Photocatalytic synthesis of M/Cu2O (M = Ag, Au) heterogeneous nanocrystals and their photocatalytic properties

Wang, Zhenghua; Zhao, Suping; Zhu, Shiyu; Sun, Yuhui; Fang, Mei

doi:10.1039/c0ce00681e

Cited by 136 publications

(103 citation statements)

References 40 publications

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“…Overall, the improvement in degradation rate of MB, RhB and their mixed aqueous solution relies on the synergistic effect of H 2 O 2 and the as prepared CuS catalysts. [34][35][36][37] A brief description of the reaction mechanism in this degradation process is described below. MR .…”

Section: Optical Properties and Bet Surface Areamentioning

confidence: 99%

Effect of the morphology of CuS upon the photocatalytic degradation of organic dyes

et al. 2014

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ARTICLE This journal isA variety of well defined, highly symmetric, super complex and hierarchical architectures of covellite copper sulfide have been successfully prepared by a simple solvothermal approach. The effect of various influencing parameters on the formation of CuS hierarchical architectures has been precisely investigated and a possible formation mechanism has been elucidated. The exposure time has been found to be a critical factor in controlling the CuS architecture and highly complex structures were obtained under elongated reaction times. The "as synthesized" architectures exhibited excellent photocatalytic activity in visible region for catalysis of individual dye (methylene blue and rhodamine B) and their mixed solutions in presence of H 2 O 2 . The efficient photocatalytic activity can be attributed to carefully controlled hierarchical CuS structures. Overall, this study is of great importance in "bottom-up" assembly of copper sulfide nanoplates to obtain highly complex structures which offer a good opportunity to understand the fundamental significance of atypical structures for their potential applications.

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Section: Optical Properties and Bet Surface Areamentioning

confidence: 99%

Effect of the morphology of CuS upon the photocatalytic degradation of organic dyes

et al. 2014

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“…53 These electrons and holes can be captured by H 2 O 2 molecules, so the formations of oxidants (eqn (1)- (4)) have taken place. It has been demonstrated that because of their high oxidative capacities, the photo-generated oxidant species are in favor of oxidizing organic contaminants.…”

Section: Photocatalytic Propertiesmentioning

confidence: 99%

Template free synthesis of CuS nanosheet-based hierarchical microspheres: an efficient natural light driven photocatalyst

et al. 2014

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Well controlled nanosheets-based hierarchical microspheres (NSHMS) of pure covellite phase CuS were synthesized using a facile PVP assisted solvothermal process. The reaction conditions were optimized using various amounts of PVP to develop unique hierarchical structured hollow microspheres. CuS hollow structures have a bandgap of ~1.97 eV. These mesoporous structures exhibit excellent photocatalytic activity in degradation of organic dyes (Methylene Blue) under natural light in comparison to other structures of copper sulphide. These photocatalysts show extraordinary reusability with over 96.5% degradation of organic dye after 6th cycle. A "bottom-up" assembly was successfully developed to synthesize hollow microspheres with unique and well defined architectures at large scale, which offer a good opportunity to understand the fundamental significance of unusual and complex hierarchical structures for their potential applications. This journal is the Partner Organisations 2014.Keywords nanosheet, light, driven, cus, free, synthesis, hierarchical, photocatalyst, template, microspheres, efficient, natural Disciplines Engineering | Physical Sciences and Mathematics Publication DetailsTanveer, M., Cao, C., Ali, Z., Aslam, I., Idrees, F., Khan, W. S., But, F. K., Tahir, M. & Mahmood, N. (2014 Well controlled nanosheets-based hierarchical microspheres (NSHMS) of pure covellite phase CuS were synthesized using a facile PVP assisted solvothermal process. The reaction conditions were optimized using various amounts of PVP to develop unique hierarchical structured hollow microspheres. CuS hollow structures have a bandgap of~1.97 eV. These mesoporous structures exhibit excellent photocatalytic activity in degradation of organic dyes (Methylene Blue) under natural light in comparison to other structures of copper sulphide. These photocatalysts show extraordinary reusability with over 96.5% degradation of organic dye after 6th cycle. A "bottom-up" assembly was successfully developed to synthesize hollow microspheres with unique and well defined architectures at large scale, which offer a good opportunity to understand the fundamental significance of unusual and complex hierarchical structures for their potential applications.

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“…Because Cu 2 O nanocubes possess only one type of exposed crystal plane, noble-metal nanoparticles can be homogeneously deposited on the surfaces of Cu 2 O nanocubes. Compared with our previously reported Cu 2 OÀAu and Cu 2 OÀAg nanocomposites prepared through a photocatalytic technique, [30] the method described herein is more convenient and quick, and the deposition of Au and Ag nanoparticles on Cu 2 O is more uniform. The obtained Cu 2 OÀAu and Cu 2 OÀAg nanocomposites can serve as efficient SERS substrates.…”

Section: Introductionmentioning

confidence: 87%

In Situ Growth of Noble‐Metal Nanoparticles on Cu₂O Nanocubes for Surface‐Enhanced Raman Scattering Detection

et al. 2014

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Gold and silver nanoparticles with a narrow size distribution were grown in situ on the surfaces of Cu2O nanocubes through a wet‐chemical reduction route. The Cu2O nanocubes serve as both the substrate and reducing agent. The as‐prepared Cu2OAu and Cu2OAg nanocomposites still retain the cubic morphology of the original Cu2O nanocubes. The Cu2OAu and Cu2OAg nanocomposites can serve as effective surface‐enhanced Raman scattering (SERS) substrates. Rhodamine 6G as a Raman probe was applied to determine the effects of the SERS substrates; the results show that Cu2OAg nanocomposites have higher sensitivity and good reproducibility. Furthermore, the Cu2OAg substrate was also applied to detect plasticizers, such as dimethyl phthalate and dibutyl phthalate, and shows potential applications in the area of food safety screening.

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Photocatalytic synthesis of M/Cu2O (M = Ag, Au) heterogeneous nanocrystals and their photocatalytic properties

Cited by 136 publications

References 40 publications

Effect of the morphology of CuS upon the photocatalytic degradation of organic dyes

Effect of the morphology of CuS upon the photocatalytic degradation of organic dyes

Template free synthesis of CuS nanosheet-based hierarchical microspheres: an efficient natural light driven photocatalyst

In Situ Growth of Noble‐Metal Nanoparticles on Cu₂O Nanocubes for Surface‐Enhanced Raman Scattering Detection

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Photocatalytic synthesis of M/Cu2O (M = Ag, Au) heterogeneous nanocrystals and their photocatalytic properties

Cited by 136 publications

References 40 publications

Effect of the morphology of CuS upon the photocatalytic degradation of organic dyes

Effect of the morphology of CuS upon the photocatalytic degradation of organic dyes

Template free synthesis of CuS nanosheet-based hierarchical microspheres: an efficient natural light driven photocatalyst

In Situ Growth of Noble‐Metal Nanoparticles on Cu2O Nanocubes for Surface‐Enhanced Raman Scattering Detection

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In Situ Growth of Noble‐Metal Nanoparticles on Cu₂O Nanocubes for Surface‐Enhanced Raman Scattering Detection