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Title: Facile synthesis of size-tunable CuO/graphene composites and their high photocatalytic performance

Abstract

Graphical abstract: A novel leaf-like CuO/graphene nanosheet (GNS) with tunable size was prepared by a facile hydrothermal process, and the stirring temperature in synthesis was found to be effective for controlling its size. - Highlights: • Leaf-like CuO/GNS nanocomposites with tunable size was prepared via hydrothermal method. • With increase of stirring temperature, the surface area becomes larger. • The morphology of nanocomposites plays an important role in photocatalysis. - Abstract: Size-tunable leaf-like copper oxide modified by graphene nanosheets was synthesized by a facile hydrothermal method. Stirring temperature control during synthesis was found to be important in effectively controlling the size of CuO nanoparticles, with smaller size CuO nanoparticles produced by increasing the stirring temperature. The as-prepared nanocomposites were characterized by XRD, TEM, and nitrogen adsorption–desorption. The nanocomposites exhibited better catalytic activity than pure CuO toward the degradation of rhodamine B in the presence of H{sub 2}O{sub 2} under visible light irradiation. The catalytic performance was improved with decreasing particle size of the nanocomposites, which was attributed to the increased in the rate of interelectron transfer at the interface.

Authors:
; ;  [1]; ;  [2];  [3];  [1];  [1];  [2]
  1. Department of Environmental Science and Engineering, Shanghai University, Shanghai 200444 (China)
  2. Shanghai Applied Radiation Institute, Shanghai University, Shanghai 200444 (China)
  3. National Centre for Computer Animation (NCCA), Bournemouth University, BH125BB (United Kingdom)
Publication Date:
OSTI Identifier:
22420777
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 61; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ADSORPTION; COPPER OXIDES; DESORPTION; GRAPHENE; HYDROGEN PEROXIDE; HYDROTHERMAL SYNTHESIS; INTERFACES; IRRADIATION; MORPHOLOGY; NANOCOMPOSITES; NANOPARTICLES; NANOSTRUCTURES; PARTICLE SIZE; PHOTOCATALYSIS; TRANSMISSION ELECTRON MICROSCOPY; VISIBLE RADIATION; X-RAY DIFFRACTION

Citation Formats

Cheng, Lingli, Wang, Yujia, Huang, Dahong, Nguyen, Tronganh, Jiang, Yong, Yu, Hongchuan, Ding, Nan, Ding, Guoji, E-mail: gjding@shu.edu.cn, and Jiao, Zheng, E-mail: zjiao@shu.edu.cn. Facile synthesis of size-tunable CuO/graphene composites and their high photocatalytic performance. United States: N. p., 2015. Web. doi:10.1016/J.MATERRESBULL.2014.10.036.
Cheng, Lingli, Wang, Yujia, Huang, Dahong, Nguyen, Tronganh, Jiang, Yong, Yu, Hongchuan, Ding, Nan, Ding, Guoji, E-mail: gjding@shu.edu.cn, & Jiao, Zheng, E-mail: zjiao@shu.edu.cn. Facile synthesis of size-tunable CuO/graphene composites and their high photocatalytic performance. United States. doi:10.1016/J.MATERRESBULL.2014.10.036.
Cheng, Lingli, Wang, Yujia, Huang, Dahong, Nguyen, Tronganh, Jiang, Yong, Yu, Hongchuan, Ding, Nan, Ding, Guoji, E-mail: gjding@shu.edu.cn, and Jiao, Zheng, E-mail: zjiao@shu.edu.cn. Thu . "Facile synthesis of size-tunable CuO/graphene composites and their high photocatalytic performance". United States. doi:10.1016/J.MATERRESBULL.2014.10.036.
@article{osti_22420777,
title = {Facile synthesis of size-tunable CuO/graphene composites and their high photocatalytic performance},
author = {Cheng, Lingli and Wang, Yujia and Huang, Dahong and Nguyen, Tronganh and Jiang, Yong and Yu, Hongchuan and Ding, Nan and Ding, Guoji, E-mail: gjding@shu.edu.cn and Jiao, Zheng, E-mail: zjiao@shu.edu.cn},
abstractNote = {Graphical abstract: A novel leaf-like CuO/graphene nanosheet (GNS) with tunable size was prepared by a facile hydrothermal process, and the stirring temperature in synthesis was found to be effective for controlling its size. - Highlights: • Leaf-like CuO/GNS nanocomposites with tunable size was prepared via hydrothermal method. • With increase of stirring temperature, the surface area becomes larger. • The morphology of nanocomposites plays an important role in photocatalysis. - Abstract: Size-tunable leaf-like copper oxide modified by graphene nanosheets was synthesized by a facile hydrothermal method. Stirring temperature control during synthesis was found to be important in effectively controlling the size of CuO nanoparticles, with smaller size CuO nanoparticles produced by increasing the stirring temperature. The as-prepared nanocomposites were characterized by XRD, TEM, and nitrogen adsorption–desorption. The nanocomposites exhibited better catalytic activity than pure CuO toward the degradation of rhodamine B in the presence of H{sub 2}O{sub 2} under visible light irradiation. The catalytic performance was improved with decreasing particle size of the nanocomposites, which was attributed to the increased in the rate of interelectron transfer at the interface.},
doi = {10.1016/J.MATERRESBULL.2014.10.036},
journal = {Materials Research Bulletin},
number = ,
volume = 61,
place = {United States},
year = {Thu Jan 15 00:00:00 EST 2015},
month = {Thu Jan 15 00:00:00 EST 2015}
}
  • Cu{sub 2}O nanocube/polycarbazole composites have been prepared by an one-pot solvothermal process using carbazole as a reductant. The polycarbazole layer not only protected and stabilized Cu{sub 2}O particles, but also prohibited the recombination of photogenerated electrons-holes pair and facilitated interfacial charge transfer between polycarbazole and Cu{sub 2}O. The composition, structure and morphology of the obtained products was systematically studied by X-ray powder diffraction (XRD), Field-emission scanning electron microscopy (FE-SEM), High-resolution transmission electron microscopy (HRTEM), Fourier transformation infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS) and UV-visible spectrophotometer. Furthermore, the visible-light photocatalytic behavior of the Cu{sub 2}O nanocube/polycarbazole composites on the methylmore » orange was investigated. - Graphical abstract: The uniform and monodisperse Cu{sub 2}O nanocube/polycarbazole composites were prepared by an one-pot solvothermal process. As covered by polycarbazole, the photocatalytic activities of Cu{sub 2}O nanocubes were improved. The polycarbazole not only protected and stabilized Cu{sub 2}O cubes, but also prohibited the recombination of photogenerated electrons-holes pair and facilitated interfacial charge transfer between polycarbazole and Cu{sub 2}O. Highlights: > The Cu{sub 2}O/polycarbazole nanocube composite has a better photocatalytic activity. > We obtained the composite by an one-pot solvothermal process. > Carbazole monomers as reductants.« less
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  • Highlights: • A new graphene/K{sub 3}PW{sub 12}O{sub 40} (GPW) composite was synthesized via photoreduction method. • Graphene in the GPW could reduce the recombination of electron-hole pairs. • Graphene in the GPW could increase adsorptive property. • GPW hybrid shows an enhancement photocatalytic activity. - Abstract: K{sub 3}PW{sub 12}O{sub 40} is a promising polyoxometalate photocatalyst for the removal of organic pollutants from water. However, two main disadvantages of poor adsorptive performance and high recombination rate of photogenerated electron-hole pair hinder its practical applications. In this paper, a new graphene nanosheets/K{sub 3}PW{sub 12}O{sub 40} nanocomposite has been synthesized via a greenmore » photoreduction strategy, being low-cost and scalable production. Characterizations show that K{sub 3}PW{sub 12}O{sub 40} nanoparticles with 60 nm or so have been successfully deposited on the graphene nanosheets. As a kind of photocatalyst, the binary graphene nanosheets/K{sub 3}PW{sub 12}O{sub 40} nanocomposite displays improved photocatalytic activity compared to pure K{sub 3}PW{sub 12}O{sub 40}. This improvement is ascribed to the introduction of graphene nanosheets in the nanocomposite, which could increase adsorptive property and reduce the recombination of electron-hole pairs.« less
  • Graphical abstract: - Highlights: • Mesoporous TiO{sub 2} nanoparticles with anatase phase were assembled on reduced graphene oxide via a template-free one-step hydrothermal method. • The TiO{sub 2}/rGO nanocomposites have better adsorption capacity and photocatalytic degradation efficiency for dyes removal. • Improved dye adsorption and photogenerated charge separation are responsible for enhanced activity. - Abstract: Mesoporous anatase phase TiO{sub 2} was assembled on reduced graphene oxide (rGO) using a template-free one-step hydrothermal process. The nanocomposites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and Brunauer–Emmett–Teller (BET) surface area.more » Morphology of TiO{sub 2} was related to the content of graphene oxide. TiO{sub 2}/rGO nanocomposites exhibited excellent photocatalytic activity for the photo-degradation of methyl orange. The degradation rate was 4.5 times greater than that of pure TiO{sub 2} nanoparticles. This difference was attributed to the thin two-dimensional graphene sheet. The graphene sheet had a large surface area, high adsorption capacity, and acted as a good electron acceptor for the transfer of photo-generated electrons from the conduction band of TiO{sub 2}. The enhanced surface adsorption characteristics and excellent charge transport separation were independent properties of the photocatalytic degradation process.« less
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