Search

Your search keyword '"Chengying Tang"' showing total 2 results
Start Over Author "Chengying Tang" Publisher mdpi
2 results on '"Chengying Tang"'

1. Facile One-Step Hydrothermal Fabrication of (Sr0.6Bi0.305)2Bi2O7/SnO2 Heterojunction with Excellent Photocatalytic Activity

Author

Chaohao Hu, Chengying Tang, Yan Zhong, Dianhui Wang, Huiting An, Di Zhu, and Xinling Wang

Subjects
photocatalytic activity, Materials science, heterojunction, General Chemical Engineering, (sr0.6bi0.305)2bi2o7, Heterojunction, One-Step, (Sr0.6Bi0.305)2Bi2O7/SnO2, (sr0.6bi0.305)2bi2o7/sno2, (Sr0.6Bi0.305)2Bi2O7, Hydrothermal circulation, Article, lcsh:Chemistry, chemistry.chemical_compound, X-ray photoelectron spectroscopy, chemistry, Chemical engineering, lcsh:QD1-999, hydrothermal method, Phase (matter), Photocatalysis, General Materials Science, Methylene blue, Visible spectrum
Abstract

The pyrochlore-type (Sr0.6Bi0.305)2Bi2O7 (SBO), containing Bi3+ and Bi5+ mixed valent states, was recently found to be used as a new visible light responsive photocatalyst. Novel SBO/SnO2 heterostructured composites were synthesized through a facile one-step hydrothermal method. The phase structure, morphology, chemical composition, and optical properties of the obtained samples were characterized by XRD, SEM, TEM, XPS, and UV-vis DRS. Compared to pure SBO and SnO2, the synthesized SBO/SnO2 composites exhibited significantly enhanced photocatalytic efficiency. The results indicated that the photoinduced holes and superoxide radicals play a dominant role and are the main reactive species during the degradation of Methylene Blue (MB) solution under visible light irradiation. Heterojunctions, formed in samples, directly contribute to the improvement of photocatalytic efficiency of SBO/SnO2 composites, since it not only broadens the light response range, but also accelerates the separation of photogenerated carriers.

Published
2020

2. Cobalt-Nickel-Boron Supported over Polypyrrole-Derived Activated Carbon for Hydrolysis of Ammonia Borane.

Author

Yongjin Zou, Yubo Gao, Cuili Xiang, Hailiang Chu, Shujun Qiu, Erhu Yan, Fen Xu, Chengying Tang, and Lixian Sun

Subjects
COBALT alloys, POLYPYRROLE, ACTIVATED carbon, HYDROLYSIS, AMMONIA compounds, NANOFIBERS
Abstract

In this study, polypyrrole (PPy) nanofibers were used to synthesize a super-activated carbon material. A highly-dispersed Co-Ni-B catalyst was supported on PPy nanofiber-derived activated carbon (PAC) by chemical reduction. The Co-Ni-B/PAC hybrid catalyst exhibited excellent catalytic performance for the decomposition of ammonia borane (AB) in an aqueous alkaline solution at room temperature. The size of the metal particles, morphology of Co-Ni-B/PAC, and catalytic activity of the min1. supported catalyst were investigated. Ni-B, Co-B, and Co-Ni-B catalysts were also synthesized in the absence of PAC under similar conditions for comparison. The maximum hydrogen generation rate (1451.2 mL-1. g-1 at 25 °C) was obtained with Co-Ni-B/PAC. Kinetic studies indicated that the hydrolysis reaction of AB was first order with respect to Co-Ni-B/PAC, and the activation energy was 30.2 kJ. mol1. Even after ten recycling experiments, the catalyst showed good stability owing to the synergistic effect of Co-Ni-B and PAC. [ABSTRACT FROM AUTHOR]

Published
2016
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results