Search query: Template method green synthesis

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abstract: Abstract Organic dyes generating from many industries are considered as a potential source of water pollution and have negative effects on human health. The present study was aimed to construct a green synthesis method for fabrication of ZnS based dual nano semiconductors and to compare the photocatalytic properties for removing cationic and anionic dyes. ZnS nanoparticles were synthesized using a template synthesis in bovine serum albumin (BSA) solution and then ZnS/PbS, ZnS/CdS and ZnS/Ag2S dual nano semiconductors were prepared using ion exchange method. Prepared nano semiconductors were characterized by using HR TEM, XRD, FTIR, TG/DTA and AAS. Moreover, photocatalytic activity of prepared nano semiconductors was tested against Rhodamine B (cationic dye) and Methyl Orange (anionic dye) Results revealed that a controllable ZnS/PbS, ZnS/CdS and ZnS/Ag2S ratio in nano semiconductors can be achieved by adjusting the ion exchange time. Prepared ZnS based composites exhibited higher photocatalytic efficiency than that of ZnS alone. In addition, photocatalytic activity of ZnS based dual nano semiconductors was found to be dependent upon composition and ratio of sulphides in nano semiconductors with environmental pH. It was concluded that the combination of template synthesis and ion exchange method is a feasible approach to fabricate new photocatalysts with higher photocatalytic activity.
author_names: Hua-jie Wang

Ying Cao

Le Wu

Sha-Sha Wu

Ali Raza

Nan Liu

Jin-Ye Wang

Teruo Miyazawa
title: ZnS based dual nano semiconductors (ZnS/PbS, ZnS/CdS or ZnS/Ag2S, A green synthesis route and photocatalytic comparison for removing organic dyes
year: 2018

abstract: Abstract Silver spongelike networks were synthesized from an alkaline pH solution of silver nitrate and glucose under solvothermal conditions. The products were characterized by X ray powder diffraction, UV visible spectroscopy, transmission electron microscopy, scanning electron microscopy and selected area electron diffraction. These Ag nanoparticles (NPs) appear to undergo sequentially linear aggregation and welding initially, and then, they randomly cross link into self supporting, three dimensional (3D) networks with time. The carboxylate groups, generated by glucose oxidation, interacted with the Ag nanostructures, resulting in formation of silver spongelike networks having very uniform wire diameters distributions (about 20 nm in diameter) A new plasmon band was observed in the longer wavelengths region (565 912 nm) of the conventional transverse plasmon resonance band at 430 nm. In principle, this one step, template free approach can also be extended to large scale 3D organizations of other transition/noble metal NPs.
author_names: Zao Yi

Xibin Xu

Kuibao Zhang

Xiulan Tan

Xibo Li

Jiang-shan Luo

Xin Ye

Weidong Wu

Jie Wu

Yougen Yi

Yongjian Tang
title: Green, one step and template free synthesis of silver spongelike networks via a solvothermal method
year: 2013

abstract: Abstract An efficient protocol for synthesis of nanosize zinc oxide without calcinations was developed by sonochemical method. The method involved only use of zinc acetate as a precursor and 1, 3 Propane diol as a solvent with multiple roles. In our study, 1,3 propanediol served multiple roles as promoter, base, stabiliser and template for synthesis of nanosize zinc oxide and it also eliminated use of any extraneous species. As prepared nanosize zinc oxide was well characterised with the help of TEM, XRD and EDAX. The analysis result showed that zinc oxide is found to be at nano scale, with uniform morphology and well crystalline nature. This is one of the facile and environmental benign protocol for synthesis of nanosize zinc oxide.
author_names: Kushal D Bhatte

Dinesh N Sawant

Dipak V Pinjari

Aniruddha Bhalchandra Pandit

Bhalchandra M Bhanage
title: One pot green synthesis of nano sized zinc oxide by sonochemical method
year: 2012

abstract: Two major goals of hierarchically porous metal organic frameworks (HP MOFs) research are the reduction of energy consumption and the enhancement of production rate. Here, we develop a simple and versatile method for the rapid synthesis of three HP MOFs (Cu BTC, Cu BDC, and ZIF 8) through introducing zinc oxide (ZnO) and template simultaneously. The synthesis condition was facile, and the synthesis time could be shortened to 30 min. Moreover, the porosity and morphology of HP MOFs could be adjustable with variable amounts and types of template. A synergistic effect of the hydroxy double salt (HDS) and template is crucial for the synthesis, whereas no meso and macropores were formed in the individual employing of either the HDS or the template. The rapid synthesis mechanism was further elucidated by the mesoscopic dynamics simulation. Furthermore, the synthetic approach of HP MOFs was readily scalable with a space time yield (STY) of up to 1322 kg*m 3*d 1, which allowed the large scale production. The prep.
author_names: Feier Li

Chongxiong Duan

Hang Zhang

Xin Yan

Jinqing Li

Hongxia Xi
title: Hierarchically Porous Metal Organic Frameworks: Green Synthesis and High Space Time Yield
year: 2018

abstract: The present work reveals a new and simple one pot green method to load doxorubicin (DOX) drugs in silica nanoparticles for efficient in vivo cancer therapy. The synthesis of DOX loaded silica nanoparticles (SiNPs/DOX) is based on the efficient encapsulation of DOX in surfactant Tween 80 micelles which act as a template for the formation of silica nanoparticles. The release profile, cellular uptake behavior, cytotoxicity and antitumor effect of SiNPs/DOX nanoparticles were investigated and compared to free DOX. The silica nanoparticles improved the cellular drug delivery efficiency and exhibited high cytotoxicity, successfully achieving the inhibition of tumor growth. Notably, the tumor size and weight of SiNPs/DOX group was 2 fold and 1.7 fold smaller than that of free DOX group, and 4 fold and 2 fold smaller than that of PBS group. The one pot green synthesis system may have the potential to be developed as a promising drug delivery system.
author_names: Shan Jiang

L Hua

Zilong Guo

Lin Sun
title: One pot green synthesis of doxorubicin loaded silica nanoparticles for in vivo cancer therapy.
venue: Materials science engineering. C, Materials for biological applications
year: 2018

abstract: Abstract The non ionic surfactant, Tween 80 (T80) a material with promising applications in the pharmaceutical, cosmetic, and food industries, has been explored here for the design of novel nanostructures (NS) We report here a direct one pot seedless green method for the synthesis of gold silver (AuAg) hollow cubic NS, with gold (90% being the major component. The concentration of T80 plays an important role in determining the shape of the NS. A minimum T80 concentration of 50 mM is required for the formation of hollow cubic NS, whose sizes are controlled by increasing the T80 concentration. The unique molecular structure of T80 directs its molecules to assemble into core shell cylindrical micelles that act as a soft template for the growth of the NS. Study of the mechanism for the formation of the NS suggests nucleation followed by co reduction of metal ions and its growth into hollow cubic NS over T80 micelles. The AuAg hollow cubic NS shows greater potential as efficient nanocatalysts than the non cubic NS obtained at lower T80 concentrations. The hollowness and the cubic shape of the NS contribute towards their effective surface area that facilitates efficient catalytic activity. The AuAg NS may have biological applications due to their cell viabilities.
author_names: Dickson Joseph

Hoomin Lee

Yun Suk Huh

Young-Kyu Han
title: Cylindrical core shell tween 80 micelle templated green synthesis of gold silver hollow cubic nanostructures as efficient nanocatalysts
year: 2018

abstract: Mesoporous SiC ceramics were prepared using different natural biopolymers (guar, tragacanth, Arabic, and xanthan gum) as both template and carbon sources. Natural biopolymers are safe, biocompatible, and inexpensive materials that can be green candidates for carbon sources. Low temperature magnesiothermic technique was used to form porous silicon carbide. In this study, tetraethylorthosilicate was prepared by sol gel method and used as silica precursor. The mixture of silica and carbon sources was carbonized under argon atmosphere at 750 degC, and then, the reaction continued by adding magnesium powder at 700 degC. Products were characterized using SEM, BET/BJH, XRD, FTIR, and Raman spectroscopy. The produced SiC materials showed mesoporous structures with high surface area and identical structures related to their carbon precursors. The results suggest that the natural gums can be potentially used as carbon templates in controlled formation of nanostructures. Also the synthesized silicon carbide nanostructures were used as catalyst supports in oxidative desulfurization of a model fuel. For this purpose, MoO3 was immobilized on the surface of SiC supports by using peroxo molybdenum complex. Such excellent catalytic performance was attributed in the presence of silicon carbide (99, 98, 94, and 93% conversion for SiCs produced from Arabic, xanthan, guar, and tragacanth, respectively).Graphical Abstract
author_names: E Khomand

Maryam Afsharpour
title: Green synthesis of nanostructured SiCs by using natural biopolymers (guar, tragacanth, Arabic, and xanthan gums) for oxidative desulfurization of model fuel
venue: International Journal of Environmental Science and Technology
year: 2018

abstract: Fabricating nanostructures (NS) with well developed morphologies and high surface areas is vital to the success of any designed material for its application in adsorption and catalysis. In this study, we prepared ZnIn2S4 NS with different morphologies using a soft template based precipitation method. X ray diffraction data show that the NS are crystalline with a hexagonal structure. Field emission scanning electron microscopy suggests that the NS are formed with different morphologies, such as lamellar structures, nanobeads, and nanopetal/nanoflake hybrids. Moreover, transmission electron microscopy confirmed the lamellar structure, which was composed of vertically grown 2D nanosheets. Brunauer Emmett Teller analysis indicates the specific surface area (135.36 to 197.63 m2 g 1) and pore width (1.41 to 4.54 nm) values of the NS vary with varying soft templates. The obtained NS have efficient adsorption performance towards malachite green dye and dichromate (Cr2O72 with maximum adsorption capacities of 1525 and 313 mg g 1, respectively, which are considerably higher than those of many other previously reported nanoadsorbents. The adsorption process follows the Freundlich isotherm model for the lamellar structure and the Langmuir isotherm model for the other morphologies. All adsorbents conformed to a pseudo second order rate kinetics model, and the best adsorbent could be recycled up to five times without significant loss of efficiency.
author_names: Afaq Ahmad Khan

Arif Chowdhury

Sunita Kumari

Sahid Hussain
title: The facile soft template morphology controlled (STMC) synthesis of ZnIn2S4 nanostructures and their excellent morphology dependent adsorption properties
year: 2020

abstract: In this research, a new nanomagnetic molecularly imprinted polymer (nanoMMIP) of brilliant blue FCF (BB) with high efficiency and nanomagnetic non imprinted polymer (nanoMNIP) were synthesized by a simple method in water medium as a green solvent. Acryl amide and N,N' methylene bis acrylamide were used as the functional monomer andcross linking agent, respectively. The synthesized nanoMMIP and nano MNIP were characterized using thermal gravimetric analysis (TGA) transmissionelectron microscopy (TEM) scanning electron microscopy(SEM) and Fouriertransforminfrared spectroscopy (FT IR) The nano MMIP,as a selective sorbent,was used to extract BB from real samples. The effect of pH, time and BB concentrationin addition toadsorption isothermswere studied. The imprinting induced extraction was confirmed by determination of recovery values for nano MNIP (37% and nano MMIP (90% The maximum binding capacity of nano MMIP for this template was 3.25 mg/g.
author_names: Naghmeh Arabzadeh

Reza Akbarzadeh

Ali Akbar Mohammadi

Maher Darwish
title: Green synthesis and application of nanomagnetic molecularly imprinted polymerfor fast solid phase extraction of brilliant blue FCF from real samples
venue: Journal of Polymer Research
year: 2018

abstract: Abstract A green and facile strategy for the synthesis of copper nanoclusters (CuNCs) is developed using Na2S2O3 as a reducing agent and bovine serum albumin as a template. The CuNCs are characterized by ultraviolet visible, fluorescence and infrared spectroscopy, transmission electron microscopy and X ray photoelectron spectroscopy. When excited at 336 nm, a strong characteristic peak of fluorescence emission is found at 407 nm. Transmission electron microscopy shows that the obtained CuNCs exhibit a spherical shape with an average diameter of ~2 nm. In addition, the CuNCs exhibit excellent water solubility and stability. Subsequently, a fluorescence method for determining minocycline (MC) is established based on the effective fluorescence quenching of CuNCs by MC attributed to the inner filter effect. The linear range is from 1.00 to 100 mM with a detection limit of 0.76 mM. Selectivity and anti interference studies indicate that the nanoprobe presents good selectivity over other substances, including biomolecules and inorganic ions. The method is successfully used for MC detection in urine and plasma samples. Therefore, the proposed fluorescence strategy based on CuNCs can provide a convenient platform for the detection of MC in biomedical applications.
author_names: Baoying Kong

Yanjie Cao

Yongli Yu

Shuang Zhao
title: Synthesis of sodium thiosulfate reduced copper nanoclusters using bovine serum albumin as a template and their applications in the fluorometric detection of minocycline
year: 2020