Search

Your search keyword '"Zhang, Bingsen"' showing total 85 results
Start Over Author "Zhang, Bingsen" Publisher elsevier b.v.
85 results on '"Zhang, Bingsen"'

49. Surface chemistry of nanocarbon: Characterization strategies from the viewpoint of catalysis and energy conversion.

Author

Yan, Pengqiang, Zhang, Bingsen, Wu, Kuang-Hsu, Su, Dangsheng, and Qi, Wei

Subjects
*SURFACE chemistry, *CARBON, *ENERGY conversion, *CATALYSIS, *RAMAN spectroscopy
Abstract

Abstract The applications of nanocarbon materials have been drawing an ever-increasing attention due to their unique physical and chemical properties. The performance of nanocarbon materials is determined or significantly influenced by their surface chemical composition and structure, including edges, holes, heteroatoms and functional groups etc. As a result, the accurate characterization and interpretation of the surface chemical properties of nanocarbon is extremely important, and numerous mature techniques were developed with the rapid progress of nanotechnology and characteristic instrumentation. In this review we summarized the latest development of characterization techniques for nanocarbon materials, the principles behind the techniques and the related data analysis methods. The characterization techniques are divided into four categories, including spectroscopy (IR, Raman, XPS, UPS, XAS, NMR and EELS), surface reaction (Boehm titration, potentiometric titration, chemical titration and TPSR), electron/probe microscopy (TEM, SEM, STM and AFM) and electro-chemistry methods. The most suitable application circumstances, test conditions and chemical information derivable by each characterization method are pointed out with examples, and the advantages and shortcomings of each technique are thoroughly discussed. We express the idea that full-scale structural information of nanocarbon could only be obtained by proper and comprehensive application of multiple kinds of characterization methods. [ABSTRACT FROM AUTHOR]

Published
2019
Full Text
View/download PDF

50. High efficiency photocatalytic hydrogen production over ternary Cu/TiO2@Ti3C2Tx enabled by low-work-function 2D titanium carbide.

Author

Peng, Chao, Wei, Ping, Li, Xiaoyao, Liu, Yunpeng, Cao, Yonghai, Wang, Hongjuan, Yu, Hao, Peng, Feng, Zhang, Liyun, Zhang, Bingsen, and Lv, Kangle

Abstract

Abstract It is of prime importance to harness the transfer and flow of photogenerated electrons and holes to elongate the lifetimes of charge carriers and enhance the activity of semiconductor photocatalyst, which can be achieved by hybridizing the photocatalyst with appropriate cocatalysts with right electronic properties and placement. Herein, MXenes, a young family of two-dimensional transition metal carbides, are exploited as a hole mediator to enhance the photocatalytic activity of TiO 2. We grow TiO 2 sheets exposing (001) surfaces on layered Ti 3 C 2 T x , and then photodeposited Cu 2 O nanodots on TiO 2. We experimentally prove that the Ti 3 C 2 T x MXene from the wet HF etching method behaves as a low work function material (ϕ = 3.4 eV). Thanks to this unique electronic property, the photogenerated electrons on TiO 2 hybridized with Ti 3 C 2 T x accumulate and tunnel to Cu 2 O to reduce it to elemental Cu as a reduction cocatalyst. The resulting Cu/TiO 2 @Ti 3 C 2 T x photocatalyst efficiently split water to produce hydrogen at 860 μmol g−1 h−1. The results presented here demonstrate the promise of MXene materials in photocatalytic solar energy utilization. The insight into the electronic property of MXene sheds light on the new approach to the rational design of high-efficiency photocatalysts composed of MXenes. Graphical abstract fx1 Highlights • Cu 2 O nanoparticles are photodeposited on TiO 2 nanosheets hybridized with 2D Ti 3 C 2. • The work function of –OH terminated 2D Ti 3 C 2 is determined as 3.4 eV. • 2D Ti 3 C 2 as hole mediator enables the in-situ reduction of Cu 2 O to Cu as reduction cocatalyst. • The Cu/TiO 2 @Ti 3 C 2 photocatalyst is highly active for water splitting to produce hydrogen at 860 μmol g−1 h−1. [ABSTRACT FROM AUTHOR]

Published
2018
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results