Search query: Semiconductor-based Nanocomposites for Selective Organic Synthesis

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author_names: Juan Su

Huilan Su

Xin-Hao Li
title: Semiconductor based nanocomposites for selective organic synthesis
year: 2021

abstract: Core shell structured nanocomposites, a type of talented functional materials with unique microstructure and properties, have shown great promise as photocatalysts for various applications, including photocatalytic degradation of pollutants, water splitting for hydrogen production, and selective organic transformations. The synthesis and utilization of efficient core shell nanoarchitectured photocatalysts for selective organic synthesis are at the center of our research efforts and the focus of this minireview. Specifically, semiconductor based core shell nanocomposites, including metal semiconductor, semiconductor semiconductor, semiconductor shell (graphene and SiO2) as photocatalysts/cocatalysts for selective oxidation of alcohols, reduction of nitro organics and carbon dioxide for synthesis of fine chemicals, and redox combined selective synthesis of pipecolinic acid are summarized. It is hoped that this minireview can make a contribution to catalyzing the development of smart core shell nanostructures in the field of photocatalytic selective organic transformations for solar energy conversion.
author_names: Siqi Liu

Nan Zhang

Yi-Jun Xu
title: Core Shell Structured Nanocomposites for Photocatalytic Selective Organic Transformations
year: 2014

abstract: In this approach, amidol, a toxic organic chemical, is used as a staining developer electrochemically detected by using binary SnO2@Nd2O3 nanocomposites (NCs) by deposition onto a flat glassy carbon electrode (GCE) The NCs were prepared by a wet chemical process followed by characterization with various conventional techniques, such as the UV Vis, FTIR, XRD, FESEM, EDS and XPS techniques. During the electrochemical method, the main key points are the sensor analytical parameters, such as selectivity, sensitivity, linearity, concentration variations, validity, response time, and repeatability. The calibration curve was plotted in the full concentration range (FCR) from 0.1 mM to 0.1 nM. From the FCR, the linear dynamic range (LDR) was found in the range 1.0 mM to 0.1 nM. The sensitivity is calculated from the slope of the calibration plot in LDR, which was 158.228 mA mM 1 cm 2. The limit of detection (LOD) and limit of quantification (LOQ) of the fabricated chemical sensor were 0.06 nM and 0.2 nM. respectively. The binary doped NC based chemical sensor probe is cheap, efficient, and environmentally friendly for detecting unsafe chemicals in the environmental and healthcare fields on a broad scale.
author_names: Mohammed Mizanur Rahman

Abdul Wahid

Abdullah Mohamed Asiri

Md Rabiul Awual

Mohammad Razaul Karim
title: One step facile synthesis of SnO2@Nd2O3 nanocomposites for selective amidol detection in aqueous phase
year: 2020

abstract: The iron oxide nanoparticles (Fe3O4) were prepared by organic molecule assisted method in aqueous solution. The facile synthetic process of Fe3O4 nanoparticles was conducted only by mixing FeCl2 and 2 methylimidazole (2 MIM) without any additives. A possible growth mechanism of the Fe3O4 nanocrystals was proposed for this mild reaction. Then, the Fe3O4 nanoparticles were anchored onto graphene oxide (GO) sheets in water by ultrasound assisted method, forming an affinity probe with strong biocompatibility. Due to the hydroxy and carboxylic groups of GO sheets, Fe3O4/GO probe exhibits excellent performance for enriching low abundance hydrophilic peptides, while the Fe3O4 nanoparticles endure the probe with specific affinity to phosphopeptides. The analytical protocol was developed for sequential enrichment of low abundance peptides and phosphopeptides by the affinity probe. It exhibited the sequence coverage of 26% for capture of 17 low abundance peptides from bovine serum albumin (BSA) as well as the selectivity of 1:1:100 for phosphopeptides from a /b casein/BSA, and low detectable concentration of 2.5 fmol and probe reusability of 5 times for capture of phosphopeptides from a /b casein. Consequently, the prepared Fe3O4/GO material possesses excellent feature as multifunctional affinity probe for low abundance peptides including phosphopeptides from complex biological matrices detected by matrix assisted laser desorption ionization time of flight mass spectrometry.
author_names: Jia-yuan Li

Xing-yu Long

Dong Sheng

Hong-zhen Lian
title: Organic molecule assisted synthesis of Fe3O4/graphene oxide nanocomposites for selective capture of low abundance peptides and phosphopeptides.
venue: Talanta
year: 2020

abstract: The development of efficient catalyst for photoredox catalyzed selective organic synthesis has always been remaining the attractive objective in recent years. Regarding semiconductor based photocat.
author_names: Jing-yu Li

Yuehua Li

Ming-Yu Qi

Qiong Lin

Zi-Rong Tang

Yi-Jun Xu
title: Selective Organic Transformations over Cadmium Sulfide Based Photocatalysts
year: 2020

abstract: Abstract In this study, we are interested in the photocatalytic activity under visible LED irradiation of one dimensional (1D) CdS @TiO2 core shell nanocomposites (CSNs) prepared through a facile and convenient method. For the synthesis of 1D CdS@TiO2 core/shell structure, titania source (Tetrabutyl titanate) was hydrolyzed by water vapor transmission on the surface of CdS nanowires (NWs) which were prepared via solvothermal method. The characterization of 1D CdS@TiO2 core shell nanocomposites (CdS@TiO2 CSNs) was performed using X ray diffraction (XRD) scanning electron microscopy (SEM) transmission electron microscopy (TEM) UV Vis spectroscopy, and UV Vis diffuse reflectance spectroscopy (DRS) The as synthesized sample was utilized for the selective reduction of nitro compounds to benzimidazole and anilide, and also the reduction of benzophenones to alcohol under blue LED irradiation. The 1D CdS@TiO2 CSNs exhibited enhanced photoactivity compared with the pure TiO2, CdS nanowires and commercial TiO2 P25. The excellent reusability of the photocatalyst was examined for six runs. The results demonstrated that the prepared sample has the potential to provide a promising visible light driven photocatalyst for other organic transformations.
author_names: Parvin Eskandari

Zahra Zand

Foad Kazemi

Moosa Ramdar
title: Enhanced catalytic activity of One Dimensional CdS @TiO2 Core Shell Nanocomposites for Selective Organic Transformations under visible LED Irradiation
year: 2021

abstract: Photocatalytic hydrogen (H2) evolution coupled with selective organic synthesis over semiconductor based photocatalysts is attractive because the clean H2 fuel and value added chemicals can be copr.
author_names: Ming-Yu Qi

Yue-hua Li

Masakazu Anpo

Zi-Rong Tang

Yi-Jun Xu
title: Efficient Photoredox Mediated C C Coupling Organic Synthesis and Hydrogen Production over Engineered Semiconductor Quantum Dots
venue: ACS Catalysis
year: 2020

abstract: The highly efficient and highly selective photocatalytic oxidation of alkenes under mild conditions is an important objective in chemical production and catalysis chemistry in the 21st century. Although there has been extensive investigation into new photocatalysts for cis cyclooctene oxidation, the problems of low conversion and poor selectivity still exist in current production processes. Herein, we demonstrate that ZnS N/C nanocomposites synthesized by a facile one step conversion from Zn based chiral metal organic frameworks as a photocatalyst exhibit excellent photocatalytic activity for the selective oxidation of cis cyclooctene under visible light with air as an oxidant at 80 degC (conversion based on cis cyclooctene is about 66.32% and the selectivity for epoxycyclooctane is about 93.42% The excellent photocatalytic activity of the ZnS N/C nanocomposites should be attributed to the synergistic effect between the ZnS and N doping carbon.
author_names: Lin Xiaoling

Beibei Liu

Hui Fei Huang

Shi Chun-feng

Yang Liu

Zhenhui Kang
title: One step synthesis of ZnS N/C nanocomposites derived from Zn based chiral metal organic frameworks with highly efficient photocatalytic activity for the selective oxidation of cis cyclooctene
year: 2018

abstract: Here we report new organic/inorganic hybrid colloidal liquid crystals that consist of colloidal calcium carbonate (CaCO3)/poly(acrylic acid) (PAA) hybrid nanodisks. We selectively synthesized anisotropic liquid crystalline CaCO3 based nanodisk and nanorod composites in water/methanol mixtures, which formed discotic and calamitic nematic liquid crystals in their colloidal dispersions, respectively. The vaterite nanodisks and calcite nanorods were selectively synthesized in methanol rich and water rich solutions, respectively. The observation of these materials with transmission electron microscopy clarified the atomic scale structures of these nanodisks and nanorods, revealing the self organized CaCO3/PAA hybrid structures with the ability to form colloidal liquid crystals. The liquid crystals were prepared under mild and aqueous conditions by methods using acidic polymers inspired by the biomineralization process. The present approach provides new insights into the design of organic/inorganic hybrid colloidal liquid crystals and development of environmentally friendly functional hybrid materials.
author_names: Masanari Nakayama

Satoshi Kajiyama

Akihito Kumamoto

Yuichi Ikuhara

Takashi Kato
title: Bioinspired selective synthesis of liquid crystalline nanocomposites: formation of calcium carbonate based composite nanodisks and nanorods
year: 2020

abstract: Abstract Covalent organic frameworks (COFs) are new generation of porous materials constructed from light elements (such as carbon, oxygen and nitrogen) linked via covalent bonds. Herein, one pot synthesis of the composite of a COF and two dimensional (2D) nanomaterials (graphene oxide (GO) graphitic carbon nitride (g C3N4) and boron nitride (BN) was reported. Melamine is poly condensed with terephthaldehyde in the presence of GO, g C3N4, and BN leading to the formation of a series of highly cross linked microporous hierarchical porous amine networks. The thermal behavior, surface morphology, and crystalline structure were studied using thermogravimetric analysis (TGA) differential thermal analysis (DTA) scanning electron microscopy (SEM) X ray diffraction (XRD) and transmission electron microscopy (TEM) The prepared COF nanocomposites possessed a high surface area of 42 509 m2 g 1 with a hierarchical porous structure and high thermal stability. COF nanocomposites (COF@GO, COF@g C3N4, and COF@BN) were explored as an adsorbent for dye removal anionic dyes (Eosin dye and fluorescein) and cationic dyes (Fuchsine, and methylene blue) The composite materials exhibit high adsorption efficiency of 100% with excellent selectivity compared to the pristine COF. The synergic effect of COF and 2D nanomaterials improves the adsorption performance of the materials.
author_names: Ahmed R Abdellah

Hani Nasser Abdelhamid

Abu-Bakr A El-Adasy

Ahmed A Atalla

Kamal I Aly
title: One pot synthesis of hierarchical porous covalent organic frameworks and two dimensional nanomaterials for selective removal of anionic dyes
year: 2020