bluuebunny/crossref_metadata_2025_split huggingface dataset:
CuWO4 Reinforced Co‐doped HAp Nanocomposite: Improved Photocatalytic Activity Towards Degradation of Eosin Y and Catalytic Activity in Crossed Aldol Condensation Reaction
Authors: Kalita Juri , Bose Adrija , Chakraborty Debarati , Bharali Linkon , Dhar Siddhartha S. 
Published: January 2024

AbstractPreventing the recombination of photoinduced charge carriers in different semiconductor photocatalysts is crucial but high‐performance photocatalyst is still challenging. Herein, we report the synthesis of a novel heterojunction of cobalt‐doped hydroxyapatite with CuWO4 i. e. Co‐HAp@CuWO4 nanocomposite by simple and facile ultrasonication technique. The morphological and structural features of the composite was examined using PXRD, FTIR, SEM, EDS, TEM, UV‐DRS and XPS techniques. The optical analysis showed that the band gap of Co‐HAp@CuWO4 nanocomposite is 1.59 eV which is very much lower than pure HAp. The photocatalytic efficiency of Co‐HAp@CuWO4 was assessed in the degradation of Eosin Y dye under solar light irradiation. The result of degradation capacity is 94.5 % after 70 minutes of solar irradiation and it follows pseudo first‐order kinetics. The impact of different reaction parameters such as catalyst amount, initial concentration of the dye, and solution pH was also examined. The recyclability test showed that the synthesized material was highly stable in the visible‐light driven dye degradation. Heterogeneous catalytic efficacy of the prepared nanocomposite was examined in the crossed aldol condensation reaction of benzaldehyde and acetone and the outcomes confirmed that dibenzylideneacetone (DBA) was formed in the condensation reaction in outstanding yields under optimum conditions.
Screen‐Printed Carbon Electrodes Modified with Poly(amino acids) for the Simultaneous Detection of Vitamin C and Paracetamol
Authors: Long Yalan , Zhan Yifang , Hong Shaoli , Mahmud Sakil , Liu Huihong 
Published: January 2024

AbstractElectrochemical polarization provides a practical means to enhance the typically sluggish electrochemical kinetics of screen‐printed electrodes. This study introduces an electrochemically deposited poly(amino acid) modification on screen‐printed carbon electrodes (SPCE) for the concurrent detection of Vitamin C (VC) and Paracetamol (PA). The poly(amino acid)‐modified sensor not only addresses the issue of peak potential overlap between VC and PA but also enhances the electrochemical responses for both analytes. For example, Poly(L–Cysteine)‐modified SPCE exhibited a linear concentration range of 1.00 to 107.14 μM for VC, with a detection limit of 0.37 μM, and a linear concentration range of 0.10 to 10.71 μM for PA, with a detection limit of 0.033 μM. In practical applications, this device successfully detected VC and PA simultaneously in VC Yinqiao tablets, a Chinese‐Western pharmaceutical formulation. The experimental results were satisfactory, with recovery values ranging from 95.13 % to 106.58 % for VC and 95.56 % to 104.12 % for PA, achieved through the standard addition technique applied to the pharmaceutical formulation. The poly(amino acid)‐modified SPCE demonstrates heightened sensitivity, lower detection limits, exceptional anti‐interference properties, and high reproducibility. These qualities hold significant promise for future advancements in drug detection.
A Simple Highly Efficient Catalyst with NiOX‐loaded Reed‐based SiC/CNOs for Hydrogen Production by Photocatalytic Water‐splitting
Authors: Jiao Xiaofei , Zhang Wenjing , Cao Xuehui , LV Shufang , Huo Li 
Published: January 2024

AbstractThe cocatalyst and the semiconductors are tightly coupled to achieve effective separation of charges, which is one of the effective ways to improve photocatalytic hydrogen production in recent years. In this report, natural reed as raw material was simple sintering to obtain silicon carbide (SiC) nanowires supported on carbon nano onions (CNOs), and NiOX as a cocatalyst was introduced and evenly distributed on the SiC and CNOs to form a NiOX/SiC/CNOs heterojunction composite, which can be used for photocatalytic hydrogen production under visible light. The structure and performance of the composite were investigated by XRD, XPS, TEM, SEM, FTIR, GC, etc. The results show that the NiOX/SiC/CNOs composite performed excellent photocatalytic activity, When the loaded NiOX is 1.0 wt %, the maximum hydrogenation rate can reach 3160.2 μmol ⋅ g−1 h−1 in the presence of Eosin Y (EY) as photosensitizer and triethanolamine (TEOA) as a sacrificial agent, which is 2.86 times that of SiC/CNOs. The improvement in photocatalytic performance was mainly attributed to synergistic effects of high light absorbing efficiency, effective charge separation, increasing the transfer rate of electrons, and NiOX high dispersion active sites in SiC/CNOs.
Synthesis and Characterizations of Molecularly Imprinted Polymer of Atrazine: Removal of Atrazine from Aqueous Samples
Authors: Roland Rachel Marcella , Bhawani Showkat Ahmad , Ibrahim Mohamad Nasir Mohamad , Wahi Rafeah 
Published: January 2024

AbstractAtrazine (ATZ) is a widely used triazine herbicide in agriculture, however, it negatively affects the environment and human health. Therefore, a molecularly imprinted polymer (MIP) was employed for the selective removal of ATZ. In this study, MIPs were produced by precipitation polymerization using ATZ as the target molecule, methacrylic acid (MAA), acrylamide (AAm), and 2‐vinylpyridine (2VP) as functional monomers and ethylene glycol dimethacrylate (EGDMA) as cross‐linker, respectively. MIP characterizations were performed using Fourier Infrared spectroscopy (FTIR) and Field Emission Electron Microscopy (FESEM). The batch binding study revealed that MIP (2VP) exhibited the highest rebinding efficiency (88.44 %) among the MIPs. Furthermore, MIP (2VP) was analyzed by Energy‐Dispersive X‐ray spectroscopy (EDX), Brunauer‐Emmett‐Teller (BET) analysis, and thermogravimetric analysis (TGA). Adsorption studies revealed that the optimum conditions for maximum adsorption efficiency were 8 ppm ATZ solution at pH 7, using 0.3 g of MIP (2VP). MIP (2VP) demonstrated higher selectivity towards ATZ than the Ametryn (AME) a competitive interferent, with a relative selectivity coefficient of 2.77. MIP (2VP) successfully removed ATZ from distilled water (95.39 %), tap water (88.16 %) and river water (86.75 %). These findings contributed for the development of MIP for the removal of ATZ, which would be helpful in the protection of ecosystem and human health in future.
Electrocatalytic Oxidation of Nitrite Using a Composite of Reduced Graphene Oxide and Cobalt‐4‐Pyridylporphyrin Coordination Polymer
Authors: Saran Neha , Bhavana Purushothaman 
Published: January 2024

AbstractThe present work describes the electrocatalytic oxidation of nitrite in the presence of a composite of coordination polymer of cobalt‐4‐pyridylporphyrin and electrochemically reduced graphene oxide. The electrode was modified by drop‐casting a suspension of graphene oxide and polymeric cobalt‐4‐pyridylporphyrin followed by reduction through cyclic voltammetry in the potential range 0.0 V to −1.5 V. The electrocatalytic investigations were carried out by voltammetric (cyclic, linear sweep, differential pulse and hydrodynamic) and by amperometric methods. The LOD and the working range obtained through different techniques are compared. The rate constant for this heterogeneous electron transfer reaction is 2.45×10−2 cms−1.
Deep Eutectic Solvent and Poly (Vinyl Alcohol) Based Self‐healable, Injectable and Adhesive „Eutectogel”: An Emerging Drug Delivery Vehicle
Authors: Parsana Nildhara , Seoud Omar El , Al‐Ghamdi Azza , Kasoju Naresh , Malek Naved 
Published: January 2024

AbstractMultifunctional polymeric eutectogel with characteristics such as self‐healing, adhesive, moldable, load bearable and penetrable through the stratum corneum layer of skin is vital for designing highly efficient platform for the new age sustained transdermal drug delivery. Inspired by the sea cucumber, which can loosen and tighten its body and merge collagen fibers to regain firmness, a biomimetic multifunctional polymeric eutectogel with above mentioned characteristics is developed here through interacting natural deep eutectic solvent (NADES) with poly (vinyl alcohol) (PVA). Hydrogen bonding interactions responsible for the formation of eutectogel, its porous three‐dimensional fibrous network morphology and mechanical strength as well as thixotropic behavior were assessed using state of the art analytical techniques. The eutectogel also exhibited multifunctional properties such as phase transition, in‐vitro degradation and stability as a function of temperature, pH and salt concentration, respectively apart from its multifunctional characteristics. The eutectogel‐bound cotton patch with high absorptivity and stability (750 % high) of curcumin was developed. The eutectogel was further investigated for its potential as the transdermal delivery vehicle for the encapsulation and delivery of anticancer drug, 5‐Fluoro Uracil. Skin permeation study and chemotherapeutic activity against MCF‐07 human breast cancer cell lines were evaluated, showing promising results.
A Fluorenone Derived Schiff Base as a Selective Colorimetric Sensor for Copper Ions and its Applications
Authors: Selvam Pravinkumar , R Bhaskar , Ramasamy Selva Kumar , Pradeep Ilayaperumal , Kumar Somanahalli Kalleshappa Ashok 
Published: January 2024

AbstractIn this study, a naked‐eye colorimetric probe (L) was synthesized by condensation reaction of 9‐fluorenone with 2‐thiophene carboxylic acid hydrazide and characterized by various analytical techniques. The presence of O, N, and S heteroatoms in L would modulate the hard and soft characters, which is responsible for selective complexation of Cu2+ and fluorenone act as signalling unit. The sensing ability of L was studied with various metal ions by colorimetric, test paper strip, and UV‐visible spectrophotometry in DMSO: H2O (6 : 4, v/v). The colorless solution L turned green upon interacting with Cu2+ ions, while other ions did not change color. The probe L exhibits an absorbance band at 354 nm; upon interaction with Cu2+ ions, it exhibits a band at 413 nm due to ligand‐to‐metal charge transfer (LMCT). The probe L binds Cu2+ in a 2 : 1 stoichiometric ratio with an association constant of 3.76×107 M−2, established using Job's and BindFit methods. Further, binding mechanism is supported by EPR and ESI studies. The probe L can work in the pH range of 3.0 to 7.5 and detect as low as 93 nM (6 ppb) by spectrophotometry. Probe L demonstrates a promising potential for detecting Cu2+ ions in the semi‐aqueous medium.
A Factor‐Free Hydrogel with ROS Scavenging and Responsive Degradation for Enhanced Diabetic Bone Healing
Authors: Zhang Qin , Chen Weikai , Li Guangfeng , Ma Zhixin , Zhu Mengru , Gao Qianmin , Xu Ke , Liu Xinru , Lu Wenyi , Zhang Wencai , Wu Yan , Shi Zhongmin , Su Jiacan 
Published: January 2024

AbstractIn view of the increased levels of reactive oxygen species (ROS) that disturb the osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs), the repair of diabetic bone defects remains a great challenge. Herein, a factor‐free hydrogel is reported with ROS scavenging and responsive degradation properties for enhanced diabetic bone healing. These hydrogels contain ROS‐cleavable thioketal (TK) linkers and ultraviolet (UV)‐responsive norbornene (NB) groups conjugated with 8‐arm PEG macromers, which are formed via UV crosslinking‐mediated gelation. Upon reacting with high levels of ROS in the bone defect microenvironment, ROS‐cleavable TK linkers are destroyed, allowing the responsive degradation of hydrogels, which promotes the migration of BMSCs. Moreover, ROS levels are reduced through hydrogel‐mediated ROS scavenging to reverse BMSC differentiation from adipogenic to osteogenic phenotype. As such, a favorable microenvironment is created after simultaneous ROS scavenging and hydrogel degradation, leading to the effective repair of bone defects in diabetic mouse models, even without the addition of growth factors. Thus, this study presents a responsive hydrogel platform that regulates ROS scavenging and stromal degradation in bone engineering.
Enabling High‐Performance Layered Li‐Rich Oxide Cathodes by Regulating the Formation of Integrated Cation‐Disordered Domains
Authors: Li Yongjian , Zhu Xinyu , Su Yuefeng , Xu Lifeng , Chen Lai , Cao Duanyun , Li Ning , Wu Feng 
Published: January 2024

AbstractLayered Li‐rich oxide cathode materials are capable of offering high energy density due to their cumulative cationic and anionic redox mechanism during (de)lithiation process. However, the structural instability of the layered Li‐rich oxide cathode materials, especially in the deeply delitiated state, results in severe capacity and voltage degradation. Considering the minimal isotropic structural evolution of disordered rock salt oxide cathode during cycling, cation‐disordered nano‐domains have been controllably introduced into layered Li‐rich oxides by co‐doping of d0‐TM and alkali ions. Combining electrochemical and synchrotron‐based advanced characterizations, the incorporation of the phase‐compatible cation‐disordered domains can not only hinder the oxygen framework collapse along the c axis of layered Li‐rich cathode under high operation voltage but also promote the Mn and anionic activities as well as Li+ (de)intercalation kinetics, leading to remarkable improvement in rate capability and mitigation of capacity and voltage decay. With this unique layered/rocksalt intergrown structure, the intergrown cathode yields an ultrahigh capacity of 288.4 mAh g−1 at 0.1 C, and outstanding capacity retention of ≈90.0% with obviously suppressed voltage decay after 100 cycles at 0.5, 1, and 2 C rate. This work provides a new direction toward advanced cathode materials for next‐generation Li‐ion batteries.
Optimizing Hydrogen and Hydroxyl Adsorption over Ru/WO2.9 Metal/Metalloid Heterostructure Electrocatalysts for Highly Efficient and Stable Hydrogen Oxidation Reactions in Alkaline Media
Authors: Cheng Zhiyu , Yang Yang , Wang Peichen , Wang Pengcheng , Yang Jiahe , Wang Dongdong , Chen Qianwang 
Published: January 2024

AbstractThe development of high‐performance, stable and platinum‐free electrocatalysts for the hydrogen oxidation reaction (HOR) in alkaline media is crucial for the commercial application of anion exchange membrane fuel cells (AEMFCs). Ruthenium, as an emerging HOR electrocatalyst with a price advantage over platinum, still needs to solve the problems of low intrinsic activity and easy oxidation. Herein, Ru nanoparticles are anchored on the oxygen‐vacancy‐rich metalloid WO2.9 by interfacial engineering to create abundant and efficient Ru and WO2.9 interfacial active sites for accelerated HOR in alkaline media. Ru/WO2.9/C displays excellent catalytic activity with mass activity (8.29 A mgNM−1) and specific activity (1.32 mA cmNM−2), which are 2.5/3.3 and 21.8/8.3 times that of PtRu/C and Pt/C, respectively. Moreover, Ru/WO2.9/C exhibits excellent CO tolerance and operational stability. Experimental and theoretical studies reveal that the improved charge transfer from Ru to WO2.9 in the metal/metalloid heterostructure significantly tune the electronic structure of Ru sites and optimize the hydrogen binding energy (HBE) of Ru. While, WO2.9 provides abundant hydroxyl adsorption sites. Therefore, the equilibrium adsorption of hydrogen and hydroxyl at the interface of Ru/WO2.9 will be realized, and the oxidation of metal Ru would be avoided, thereby achieving excellent HOR activity and durability.
Metabolism‐Regulating Nanozyme System for Advanced Nanocatalytic Cancer Therapy
Authors: Liu Chang , Xu Xiaoyu , Chen Yongyang , Yin Miao , Mäkilä Ermei , Zhou Wenhui , Su Wenmei , Zhang Hongbo 
Published: January 2024

AbstractNanocatalytic therapy, an emerging approach in cancer treatment, utilizes nanomaterials to initiate enzyme‐mimetic catalytic reactions within tumors, inducing tumor‐suppressive effects. However, the targeted and selective catalysis within tumor cells is challenging yet critical for minimizing the adverse effects. The distinctive reliance of tumor cells on glycolysis generates abundant lactate, influencing the tumor's pH, which can be manipulated to selectively activate nanozymatic catalysis. Herein, small interfering ribonucleic acid (siRNA) targeting lactate transporter‐mediated efflux is encapsulated within the iron‐based metal–organic framework (FeMOF) and specifically delivered to tumor cells through cell membrane coating. This approach traps lactate within the cell, swiftly acidifying the tumor cytoplasm and creating an environment for boosting the catalysis of the FeMOF nanozyme. The nanozyme generates hydroxyl radical (·OH) in the reversed acidic environment, using endogenous hydrogen peroxide (H2O2) produced by mitochondria as a substrate. The induced cytoplasmic acidification disrupts calcium homeostasis, leading to mitochondrial calcium overload, resulting in mitochondrial dysfunction and subsequent tumor cell death. Additionally, the tumor microenvironment is also remodeled, inhibiting migration and invasion, thus preventing metastasis. This groundbreaking strategy combines metabolic regulation with nanozyme catalysis in a toxic drug‐free approach for tumor treatment, holding promise for future clinical applications.
Hollow Zeolite Nanoreactor with Double Shells for Methanol Aromatization: Explicit Recognition on Catalytic Function of Inverse Elemental Zone and Shell‐Cavity
Authors: Ma Qian , Fu Tingjun , Wang Zhuo , Li Caiyan , Wu Xueqing , Yang Ning , Li Zhong 
Published: January 2024

AbstractCore@shell catalyst composited of dual aluminosilicate zeolite can effectively regulate the distribution of acid sites to control hydrocarbon conversion process for the stable formation of target product. However, the diffusion restriction reduces the accessibility of inner active sites and affects synergy between core and shell. Herein, hollow ZSM‐5 zeolite nanoreactor with inverse aluminum distribution and double shells are prepared and employed for methanol aromatization. It is demonstrated that the intershell cavity alleviated the steric hindrance from zeolites channel and provided more paths and pore entrance for guest molecule. Correspondingly, olefin intermediates generated from methanol over the external shell are easier to adsorb at internal acid sites for further reactions. Importantly, the diffusion of generated aromatic macromolecules to the external surface is also promoted, which slows down the formation of internal coke, and ensures the use of internal acid sites for aromatization. The aromatics selectivity of the nanoreactor remained at 8% after 154 h, while that of solid core@shell catalyst decreased to 2% after 75 h. This finding promises broader insight to improve internal active site utilization of core@shell catalyst at the diffusion level and can be great aid in the flexible design of multifunctional nanoreactors to enhance the relay efficiency.
Confined Nano‐Channels Incorporated with Multi‐Quaternized Cations for Highly Phosphoric Acid Retention HT‐PEMs
Authors: Li Xiaofeng , Zhang Bin , Wang Zimo , Chen Yaohan , Guo Jing , Kang Shuwen , Zou Weimin , Zheng Jifu , Li Shenghai , Zhang Suobo 
Published: January 2024

AbstractDeveloping a new strategy to retain phosphoric acid (PA) to improve the performance and durability of high‐temperature proton exchange membrane fuel cell (HT‐PEMFC) remains a challenge. Here, a strategy for ion‐restricted catcher microstructure that incorporates PA‐doped multi‐quaternized poly(fluorene alkylene‐co‐biphenyl alkylene) (PFBA) bearing confined nanochannels is reported. Dynamic analysis reveals strong interaction between side chains and PA molecules, confirming that the microstructure can improve PA retention. The PFBA linked with triquaternary ammonium side chain (PFBA‐tQA) shows the highest PA retention rate of 95%. Its H2/O2 fuel cell operates within 0.6% voltage decay at 160 °C/0% RH, and it also runs over 100 h at 100 °C/49% RH under external humidification. This combination of high PA retention, and chemical and dimensional stability fills a gap in the HT‐PEMFC field, which requires strict moisture control at 90–120 °C to prevent acid leaching, simplifying the start‐up procedure of HT‐PEMFC without preheating.
Mechanism of Self‐Oxidative Copolymerization and its Application with Polydopamine‐pyrrole Nano‐copolymers
Authors: He Yuan , Fan Zhongxiong , Sun Pengfei , Jiang Hairong , Chen Zhou , Tang Guo , Hou Zhenqing , Sun Yanan , Yi Yunfeng , Shi Wei , Ge Dongtao 
Published: January 2024

AbstractCurrently, the copolymer of dopamine (DA) and pyrrole (PY) via chemical and electrochemical oxidation usually requires additional oxidants, and lacks flexibility in regulating the size and morphology, thereby limiting the broad applications of DA‐PY copolymer in biomedicine. Herein, the semiquinone radicals produced by the self‐oxidation of DA is ingeniously utilized as the oxidant to initiate the following copolymerization with PY, and a series of quinone‐rich polydopamine‐pyrrole copolymers (PDAm‐nPY) with significantly enhanced absorption in near‐infrared (NIR) region without any additional oxidant assistance is obtained. Moreover, the morphology and size of PDAm‐nPY can be regulated by changing the concentration of DA and PY, thereby optimizing nanoscale PDA0.05‐0.15PY particles (≈ 150 nm) with excellent NIR absorption and surface modification activity are successfully synthesized. Such PDA0.05‐0.15PY particles show effective photoacoustic (PA) imaging and photothermal therapy (PTT) against 4T1 tumors in vivo. Furthermore, other catechol derivatives can also copolymerize with PY under the same conditions. This work by fully utilizing the semiquinone radical active intermediates produced through the self‐oxidation of DA reduces the dependence on external oxidants in the synthesis of composite materials and predigests the preparation procedure, which provides a novel, simple, and green strategy for the synthesis of other newly catechol‐based functional copolymers.
Can either using cognitive science principles or improving teacher content knowledge boost student achievement in middle school science?
Authors: Kramer Steven L. , Scull Janie , Porter Andrew , Massey Christine M. , Merlino F. Joseph , Baker John Y. 
Published: January 2024

AbstractThis study used a cluster randomized controlled trial to investigate the effectiveness of two approaches to increasing middle school students' science learning when using an inquiry‐based science curriculum. Eighty‐nine schools, with 253 teachers and 20,591 students, were randomly assigned into one of three conditions: (a) a treatment condition in which the textbook curriculum was modified based on three principles of cognitive science coupled with teacher professional development (PD), (b) a second treatment condition in which teachers received PD designed to improve their knowledge of the science content, and (c) a business‐as‐usual control group. The cognitive science treatment had a small but statistically significant positive effect on content learning, with a stronger impact on students of higher prior achievement. Compared to business‐as‐usual, the intervention to increase teacher content knowledge had no impact.