bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mg‐ZnO/CNT Nanocomposite as Electrode Materials with Enhanced Electrochemical Performance for Supercapacitor Applications
Authors: Sheoran Mahima , Sharma Rohit , Chaudhary Swati , Dawar Anit , Ojha Sunil , Mishra Ambuj , Dhakate Sanjay R. , Srivastava Anurag , Sinha Om Prakash 
Published: August 2024

AbstractThe present research work reported the study of nanocomposites of undoped and Mg‐doped ZnO with CNT as electrode materials for supercapacitor application. The undoped ZnO/CNT and Mg‐doped ZnO/CNT nanocomposites (i.e., 10 % Mg‐doped and 20 % Mg‐doped) were synthesized using a cost‐effective blending‐assisted hydrothermal method. The morphological (FESEM & TEM) studies revealed that the diameter of CNT was ~7 nm and the ZnO nanoparticles were spherical in shape with an average particle size of ~5 nm. In addition, it was also found that 10 % Mg‐ZnO and 20 % Mg‐ZnO had a sheet‐like structure. XRD and FTIR studies further confirmed the successful doping of Mg in ZnO and CNT nanocomposites. BET analysis showed that the value of specific capacitance increased with the increase in surface area. Further, the electrochemical performance of these nanocomposites revealed that the higher doping percentage, 20 % Mg‐ZnO/CNT nanocomposite achieved the highest specific capacitance value i.e., 458.5 F/g at 0.1 A/g current density in 3M H2SO4 electrolytic solution, having a retention of 99.8 % after 12,00 long cycles. In addition, the charge storage mechanism revealed that the as‐synthesized nanocomposites showed both the diffusion‐controlled and capacitive‐controlled behaviors. Thus, a higher value of specific capacitance with excellent cyclic stability indicated the higher efficiency of Mg‐doped ZnO/CNT nanocomposite for future supercapacitor applications.
Convenient Synthesis of Pyrano[3,2‐g]chromene‐6‐ones from Naturally Occurring Visnagin and Evaluation of their Antimicrobial Activity
Authors: Alhadhrami Nahlah A. , Al‐Harbi Reem A. K. , Abbas Samir Y. 
Published: August 2024

AbstractIt is well known that chromones possess numerous of biological activities. Due to their significant applications, there are increasing for synthesizing of several chromones but few pyranochromene have been synthesized. So, simple and convenient routes for the synthesizing of new pyrano[3,2‐g]chromenone derivatives in high yields were illustrated using visnagin as starting naturally occurring. Ring opening of visnagin afforded 6‐formyl‐7‐hydroxychromone derivative which was subjected to react with variety of active methlyene derivatives to afford pyrano[3,2‐g]chromenone derivatives. Thus, heating of 6‐formylchromone with aroylacetate gave the 3‐(aroyl)‐pyranochromene‐2,6‐dione. The desired pyranochromene‐3‐carboxamide derivatives were obtained when the precursor 6‐formylchromone was condensed with ethyl 3‐oxo‐3‐(arylamino)propanoates. When 6‐formylchromone was condensed with hippuric acid gave oxazolone derivative rather than pyranochromene derivative. Condensation of 6‐formylchromone with cyanothioacetamide led to the formation of thioamide derivative. 2‐Iminopyranochromene derivatives were synthesized through reaction of 6‐formylchromone with diverse cyanoacetamide derivatives. Finally, reaction of 6‐formylchromone with 3‐(dimethylpyrazolyl)‐3‐oxopropanenitrile gave 3‐cyano‐pyranochromenedione rather than pyrazole derivative. Antimicrobial activity of the synthesized pyranochromenone derivatives was evaluated. Nearly all compounds showed weak effects towards B. subtilis and P. vulgaris. All compounds showed no effects towards S. aureus and E. coli. All compounds showed no effects towards all tested fungi except thioamide derivative 6 showed moderate activity.
A Graphene/ZnO/ZnS/MoS2 Heterojunction with Excellent Photocatalytic Activity
Authors: Jia Mingming , Zhao Xuhao , Yu Shoushan , Chen Kezheng 
Published: August 2024

AbstractIn this work, a well‐defined flower‐like ZnO (ZnO−F) was prepared through the precipitation method, and a graphene/ZnO/ZnS/MoS2 heterojunction (GR/ZnO−H) was fabricated using the hydrothermal approach. The morphological, compositional, and optical characteristics of the prepared materials were systematically investigated employing various analytical techniques. The photodegradation performance of these materials were assessed through methylene blue (MB) photodegradation experiments. Remarkably, GR/ZnO−H exhibited superior photodegradation efficacy compared to both pure ZnO−F and ZnO/ZnS/MoS2 heterojunctions, with a degradation rate reaching 98.8 % within 240 minutes. The examination of the photocatalytic mechanism revealed that superoxide anions (O2⋅−), hydroxyl radicals (⋅OH), and holes (h+) are the principal photocatalytic active species during MB degradation. This investigation unveils a highly effective photoregenerative material with promising applications in wastewater treatment.
Dendritic Pt Aerogel for Highly Efficient Electrocatalytic Methanol Oxidation Reaction
Authors: Lin Shuai , Wang Lingwei , Liu Xia , Cai Chen , Cai Bin 
Published: August 2024

AbstractMetallic aerogels, as featured by high surface area, porosity, and self‐supported metal skeleton, are regarded as an ideal platform for developing next‐generation electrocatalysts. However, the precise adjustment of their skeleton nanostructure to enhance catalytic properties remains significantly underexplored. Herein, inspired by the impact of the metal atoms’ coordination number on their reactivity, we devised and prepared dendritic Pt aerogels (DPAs) via a facile sol‐gel method. The synergy of aerogel structure and coordinatively distinct catalytic sites from dendritic morphology enables DPAs to exhibit markedly improved electrocatalytic activity and stability for methanol oxidation reaction. The mass activity and specific activity of DPAs are 1.28 A mgPt−1 and 1.5 mA cmPt−2, which are 4.1 and 3.2 times higher than those of commercial Pt/C, respectively.
VPreparation of Temperature/pH Dual‐Sensitive Hydrogels and Study of their Properties
Authors: Yuan Long , Liu Xinyun , Xiong Jing , Lei Hua 
Published: August 2024

AbstractA temperature/pH dual‐sensitive hydrogel was prepared through simple solution radical polymerization. A novel temperature/pH dual‐sensitive terpolymerized semi‐interpenetrating network, P(NIPAAm‐co‐AA‐co‐HEAA)/SA hydrogel, was synthesized using interpenetrating network technology (IPN) with sodium alginate (SA) as the raw material. The temperature‐sensitive monomer N‐isopropylacrylamide (NIPAAm), the pH‐sensitive monomer acrylic acid (AA), and the hydrophilic monomer N‐hydroxyethylacrylamide (HEAA) were incorporated into the structure. The structure and morphology of the hydrogels were investigated using FTIR, TGA and SEM. Additionally, the swelling properties, as well as temperature and pH sensitivity, were examined. The results showed that the content of HEAA and SA influenced the swelling properties of the gels. The gels exhibited distinct swelling behaviors at different temperatures and pH levels, demonstrating remarkable temperature and pH sensitivity. Moreover, it shows rapid response speed and efficient recovery, making them suitable for use as anticancer drug carriers that meet specific requirements.
One‐Second Surface Graphenization Strategy for Highly Sensitive Valrubicin Electrochemical Sensor
Authors: AbdelHamid Ayman A. , Elgamouz Abdelaziz , Kawde Abdel‐Nasser 
Published: August 2024

AbstractWe report a novel one‐second strategy for the surface treatment of conventional graphite electrodes for the electrochemical detection of valrubicin, a potent chemotherapeutic agent used intravesically for the treatment of bladder cancer. The surface graphenization process enhances the surface area of the electrode and introduces surface defects and strain that increase its electrocatalytic activity and provides fast charge transfer pathways for an efficient redox process with excellent stability due to the direct connection with the core graphite electrode. The surface graphenized electrode is characterized using electron microscopy and Raman spectroscopy, and its electrochemical properties are studied using cyclic voltammetry and electrochemical impedance spectroscopy. A voltammetric method is developed for valrubicin detection using the surface graphenized electrode, optimized, and the electrochemical reduction mechanism is elucidated. A calibration curve is established with a wide linear range of 0.02–3 μM and a low limit of detection of 26.9 nM. Excellent reproducibility and stability are displayed and the clinical validity is demonstrated by analyzing valrubicin in human serum, achieving a high recovery of ≈90 %. The high performance and excellent sensitivity of the developed electrode show the significant impact of the surface graphenization strategy for further application in electrochemical sensing.
Visual‐Detection of Cu2+ in DMSO aAqueous Solution Based on Benzimidazole Azo‐dye as a Colorimetric Chemosensor
Authors: Ghorbanian Moein , Asghari Sakineh , Tajbakhsh Mahmood 
Published: August 2024

AbstractIn this work, a novel colorimetric chemosensor (BIAD) containing azo chromophore, 1,5dihydroxynaphthalene, and benzimidazole was synthesized and characterized by using IR, 1H,13C NMR, and mass spectral data, and elemental analysis. The cation recognition studies (including fourteen metal cations) exhibited that the synthesized azo dye can act as a rapid, sensitive, and selective colorimetric chemosensor for detecting Cu2+ ions. The addition of Cu2+ ions to the BIAD solution, changed immediately the solution color from purple to blue‐green, which could be observed by the naked eye. Comparison of the UV/Visible spectra of BIAD and (BIAD+Cu2+) revealed a red shift from 543 nm to 616 nm, which confirms the formation of a complex between Cu2+ cations and BIAD molecules. The result of Job's plot indicated that the stoichiometry binding ratio of BIAD to Cu2+ is 1 : 1. The limit of detection (LOD) was found for BIAD toward Cu2+ ion to be 0.10 μM. Furthermore, the BIAD‐based test paper strips were successfully used for the rapid detection of Cu2+ ions (<1 sec) in the aqueous solution (H2O‐DMSO, 9 : 1).
Gold Nanoparticles and Antimicrobial Peptides: A Novel Combination
Authors: Balcı Şule , Ergüden Bengü 
Published: August 2024

AbstractThis article examines the diverse conjugation forms of AMP‐AuNP nanostructures that arise from the amalgamation of antimicrobial peptides (AMPs) and gold nanoparticles (AuNPs), as well as their prospective utility in the field of biomedicine. AMPs are a class of naturally occurring microbicidal compounds that are recognized for their wide range of inhibitory effects and distinctive modes of operation. The utilization of AuNPs in diverse biomedical applications is facilitated through the application of nanotechnology. AMP‐AuNP nanostructures exhibit diverse features through the utilization of molecular linkage techniques. The aforementioned qualities encompass the ability to expedite the process of wound healing, facilitate precise targeting through the incorporation of DNA aptamers, serve as a means for bacterial imaging, enable the use of photothermal therapy, and contribute to the advancement of prospective treatments for fungal infections. The utilization of these synthesized antimicrobial gold nanostructures in many biomedical applications holds significant promise for advancing treatments and enhancing disease management.
Phytofabrication of Silver Nanoparticles Using Pomegranate Juice Extract for Antioxidant, Antimicrobial and Cytotoxic Activities
Authors: Rani Jyoti , Singh Sushila , Beniwal Anuradha , Moond Monika , Kakkar Simran , Sangwan Seema , Kant Sharma Rajni 
Published: August 2024

AbstractIn the current research, monowave‐assisted biosynthesis of AgNPs utilising aqueous Pomegranate Juice extract (PJE) for antioxidant, antimicrobial and cytotoxic activities were evaluated. The synthetic approach used for the biosynthesis of AgNPs was simple, affordable and eco‐friendly. UV‐Visible, DLS, FTIR, XRD, FE‐SEM and HR‐TEM techniques were used to characterize the synthesized AgNPs. The DLS technique confirmed the monodispersed nature and zeta potential of −25.8 mV. FTIR technique revealed that OH functional groups of phytochemicals were crucial for the reduction and stabilization of AgNPs. FESEM and HRTEM techniques confirmed that biosynthesized AgNPs appeared spherical and triangular. XRD analysis resulted in 18.04 nm size of AgNPs. The antioxidant capacityof biosynthesized AgNPs was analysed via DPPH (IC50 35.20 μg/mL), ABTS (IC50 37.77 μg/mL), FRAP (4.37 mM Fe(II)/mL at 90 μg/mL) and total antioxidant (77.16 g AAE/mL at 90 μg/mL) assays. Biosynthesized AgNPs exhibited antifungal activity against Colletotrichum gloesporioides, Colletotrichum graminicola and antibacterial activity against Xanthomonas axonopodis, Klebsiella aerogenes at 50 μg/mL. Owing to these studies, synthesized AgNPs may be valuable in the future for biomedical and agricultural applications.
Studies on the Termination Behavior of Styrenic Free‐Radicals
Authors: Zhijie Wei , Pengyu Yin , Li Jiang , Qimin Jiang , Wenyang Huang , Bibiao Jiang 
Published: August 2024

AbstractIn order to provide more evidence to understand the termination mechanism in styrene free‐radical polymerization, (1‐bromoethyl) benzene and polystyrene with bromide end group (PSt‐Br) synthesized by atom transfer radical polymerization (ATRP) were used as the model compound and model polymer to study the termination behavior of styrenic radical by atom transfer radical coupling (ATRC), and then the NMR chemical shifts of the head‐to‐head enchainment from coupling termination were obtained. SEC and different NMR measurement methods were used to analyze and characterize the products. It is confirmed that there is no bimolecular disproportionation termination between styrenic free radicals, but only coupling termination to form the head‐to‐head enchainment. The proton and carbon chemical shifts of the head‐to‐head enchainment from coupling termination for (1‐bromoethyl) benzene are 2.7–2.86 ppm and ~47.3 ppm. As for the polystyrene through ATRC from PSt‐Br, the corresponding chemical shifts are 2.61–3.29 ppm and ~46.4 ppm, respectively, they are almost the same as the data in our previous paper (~3.05 ppm, ~46.6 ppm) for polystyrene initiated by BPO, proving that the chain termination in free‐radical polymerization of styrene initiated by BPO occurs through primary termination between chain radical and primary radical rather than bimolecular termination between chain radicals.
ZnS Derived from Hydrozincite Precursor: Impact of the Synthesis‐Solvothermal Temperature on the Photocatalytic Hydrogen Evolution
Authors: Piña‐Pérez Yanet , Aguilar‐Martínez Octavio , Santolalla‐Vargas C. E. , Samaniego‐Benítez Enrique , Mantilla Ángeles , González Federico , Tzompantzi Francisco , Santes Víctor 
Published: August 2024

AbstractThis paper presents the synthesis of ZnS through solvothermal method using hydrozincite (Zn5(CO3)2(OH)6) as a precursor. Zinc sulfide (ZnS) was synthesized at four different temperatures: 80 °C, 100 °C, 140 °C, and 180 °C. All photocatalysts that were synthesized underwent characterization by X‐ray diffraction, scanning electron microscopy, infrared spectroscopy, thermogravimetric analysis, N2 adsorption‐desorption isotherms, diffuse reflectance spectroscopy, and X‐ray photoelectron analysis. The performance of H2 using photocatalysis was evaluated by utilizing methanol as a sacrificial agent. At 80 °C solvothermal temperature, the ZnS exhibited maximum photoactivity, leading to an H2 generation rate of 154.8 μmolh−1. The high photo‐activity of ZnS synthesized at 80 °C was mainly influenced by the crystallite size, which has an essential influence on the specific surface area. The photocatalytic efficiency of the most active material decreased by approximately 17 % over four reaction cycles due to the photo corrosion effect, with ZnSO3 being the primary by‐product formed after the reaction.
A Simple and Eco‐Friendly Fluorescent Probe for α‐Amylase Detection Based on Hydroxyproply‐β‐Cyclodextrin‐Curcumin Inclusion Complex
Authors: Yan Zhaoxu , Guo Rui , Du Ting , Tian Danbi , Jiang Ling , Zhu Liying 
Published: August 2024

AbstractOwing to the importance of α‐amylase in industry, it is necessary to develop a more simple and practical approach to measure α‐amylase activity. Herein, a fluorescence method was established for the detection of α‐amylase activity based on hydroxyproply‐β‐cyclodextrin‐curcumin inclusion complex (HP‐β‐CDs‐Cur). Curcumin was utilized as a signal probe, while hydroxyproply‐β‐cyclodextrin (HP‐β‐CDs) was employed both as a substrate of α‐amylase and the carrier of curcumin. α‐amylase is capable to hydrolyse α‐1,4‐glycosidic bond on the HP‐β‐CDs ring, facilitating the detection of its activity through the measurement of the decrease of fluorescence intensity caused by the release of curcumin into the aqueous. The results showed that there was a good linear relationship between fluorescence intensity and α‐amylase concentration in the range of 0.065~1.365 U mL−1, and the detection limit was 0.0065 U mL−1. The successful application of this method to evaluate the activities of multiple commercial α‐amylases underscores its robustness and reliability.
Self‐Scrolling of a Graphyne Ribbon Near a CNT in Multiphysical Environments
Authors: Song Bo , Cai Kun , Ma Jian , Qin Qing‐Hua 
Published: August 2024

AbstractGraphyne nanoscrolls (GNSs) have attracted significant research interest because of their wide‐ranging applications. However, the production of GNSs via a self‐scrolling approach is environment dependent. Here, molecular dynamics simulations are conducted to evaluate the self‐scrolling behavior of an α‐graphyne (α‐GY) ribbon on a carbon nanotube (CNT) within various multiphysical environments, accounting for the interactions among temperature, electric field, and argon gas. The results demonstrate that the fabrication of an α‐GNS lies in the interplay of van der Waals (vdW) forces among the components in a vacuum. Notably, the α‐GY ribbon is easier to scroll onto a thicker CNT. The electric field attenuates the vdW interaction, necessitating thicker CNTs for successful self‐scrolling under a stronger electric field. In argon, both the vdW interaction and nanoscale pore contribute to the overlap formation. At 300 K, increasing argon density prolongs the time required for α‐GNS formation, with self‐scrolling failing beyond a critical gas density threshold. Moreover, the self‐scrolling becomes easier at higher temperatures. In multiphysical environments, the interplay between the electric field and the gas density dictates the self‐scrolling at low temperatures. Finally, reasonable suggestions are given for successful self‐scrolling. The conclusions offer valuable insights for the practical fabrication of α‐GNS.
Targeting the Skin: The Study of a Bottlebrush Polymer‐Antisense Oligonucleotide Conjugate in a Psoriasis Mouse Model
Authors: Fang Yang , Cai Jiansong , Fei Feng , Zhong Tongtong , Ren Mengqi , Wang Dali , Li Yao , Zhang Ke 
Published: August 2024

AbstractThe investigation of gene regulation therapeutics for the treatment of skin‐related diseases is rarely explored in part due to inefficient systemic delivery. In this study, a bottlebrush polymer‐antisense oligonucleotide (ASO) conjugate, termed pacDNA, designed to target IL‐17 receptor A (IL‐17RA), which is involved in psoriasis pathogenesis is presented. Systemic administration of pacDNA led to its accumulation in epidermis, dermis, and hypodermis of mouse skin, reduced IL‐17RA gene expression in skin, and significantly reversed the development of imiquimod (IMQ)‐induced psoriasis in a mouse model. These findings highlight the potential of the pacDNA as a promising nanoconstruct for systemic oligonucleotide delivery to the skin and for treating psoriasis and other skin‐related disorders through systemic administration.
Orthorhombic Polar Phase in Sodium Niobate Nanoribbons
Authors: Canabarro Beatriz Rodrigues , Calderon Sebastian , Letichevsky Sonia , Jardim Paula Mendes , Ferreira Paulo 
Published: August 2024

AbstractFerroelectric materials exhibit switchable spontaneous polarization below Curie's temperature, driven by octahedral distortions and rotations, as well as ionic displacements. The ability to manipulate polarization coupled with persistent remanence, drives diverse applications, including piezoelectric devices. In the last two decades, nanoscale exploration has unveiled unique material properties influenced by morphology, including the capability to manipulate polarization, patterns, and domains. This paper focuses on the characterization of nanometric sodium niobate (SN) synthesized from metallic niobium through alkali hydrothermal treatment, utilizing electron microscopy techniques, including high‐resolution differential phase contrast (DPC) in scanning transmission electron microscopy (STEM). The material exhibits a nanoribbon structure forming a tree root‐like network. The study identifies crystallographic phase, atomic columns displacement directions, and surface features, such as exposed planes and the absence of particular atomic columns. The high sensitivity of integrated DPC images proves crucial in overcoming observational challenges in other STEM modes. These observations are essential for potential applications in electronic, photocatalytic, and chemical reaction contexts.
Pulsed Airstream‐Driven Hierarchical Micro‐Nano Pore Structured Triboelectric Nanogenerator for Wireless Self‐Powered Formaldehyde Sensing
Authors: Wang Gang , Ren Zhongkan , Zheng Longkui , Kang Yajie , Luo Ning , Qiao Zhuhui 
Published: August 2024

AbstractFormaldehyde (HCHO), as a common volatile organic compound, has a serious impact on human health in the daily lives and industrial production scenarios. Given the security issue of HCHO detection and danger warning, a ZIF‐8/copper foam based pulsed airstream‐driven triboelectric nanogenerator (ZCP‐TENG) is designed to develop the self‐powered HCHO sensors. By combining contact electrification and electrostatic induction, the ZCP‐TENG can be utilized for airflow energy harvesting and HCHO concentration detection. The short‐circuit current and output power of the ZCP‐TENG can reach 2.0 µA and 81 µW (20 ppm). With the high surface area, abundant micro‐nano pores, and excellent permeation flux, the ZCP‐TENGs exhibit excellent HCHO sensing response (61.3% at 100 ppm), low detection limit (≈2 ppm), and rapid response/recovery time (14/15 s), which can be served as a highly sensitive and selective HCHO sensor. By connecting an intelligent wireless alarm, the ZCP‐TENGs are designed to construct a self‐powered warning system to monitor and remind the HCHO of exceedance situations. Moreover, by combining a support vector machine model, the difference concentrations can be quickly identified with an average prediction accuracy of 100%. This study illustrates that ZCP‐TENGs have broad application prospects and provide guidance for HCHO monitoring and danger warnings.