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8 results on '"Chenhang Zhang"'

1. Role of oxygen species and active phase of CuCeZrOx prepared with bacterial cellulose for toluene catalytic oxidation

Author

Chenhang Zhang, Chenchen Zhao, Running Kang, Qinglan Hao, Baojuan Dou, and Feng Bin

Subjects
Cu-Ce-Zr catalyst, Oxygen species, Active phase, In-situ DRIFT, Catalytic oxidation, Chemical technology, TP1-1185
Abstract

The present study investigates the active phases and the role of oxygen species in the toluene oxidation process over CuCeZrOx catalysts prepared with bacterial cellulose (BC), and compares them with nitric acid pickling CuCeZrOx-BC(H) and CeZrOx-BC catalysts. The investigation is carried out using in-situ DRIFT, O2-TPD, H2-TPR, XRD, and TEM techniques. Our findings suggest that dispersed CuO species on the catalyst surface, Cu-Ce-Zr-O, and Ce-Zr-O solid solutions are active for toluene oxidation over CuCeZrOx-BC, with corresponding activities decreasing successively. The in-situ DRIFT results demonstrate that gaseous oxygen facilitates the chemisorption of toluene on active oxygen species, forming benzoyl oxide species and partially oxidizing the absorbed intermediates to benzyl alcohol at room temperature. Furthermore, lattice oxygen is experimentally found to be involved in the deep oxidation of toluene, and the lattice oxygen present in dispersed CuO species dominates the toluene oxidation process over CuCeZrOx-BC.

Published
2023
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5. Synthesis of Cu

Author

Pandong, Ma, Chenhang, Zhang, Baojuan, Dou, Xiaokun, Yi, Feng, Bin, and Wenjun, Liang

Abstract

Cubic Cu

Published
2022

8. Study on Performance of Nano-silver Conductive Inkjet Printed Circuits

Author

Ben Liu, Maohai Lin, Chenhang Zhang, Zhijin Li, Meiqi Lin, and Kaiyang Sang

Subjects
Printed circuit board, Materials science, business.industry, Electrical resistivity and conductivity, Conductive ink, Optoelectronics, Sintering, Electronics, Conductivity, business, Electrical conductor, Layer (electronics)
Abstract

With the rapid development of printing electronics, conductive ink as an important part of printing electronics, the electrical conductivity of which printed on different substrates has become the focus of research. In this paper, the printed circuit of different patterns and thickness of ink layer were printed on photo paper and PET film by using the nano-silver conductive ink with the particle size of 30 nm and solid content of 5–10%, and its conductivity was tested under different sintering temperature. The experimental results showed that the circuit could still maintain good electrical conductivity with the change of printing pattern. As the thickness of the ink layer increases, the circuit width becomes wider, the conductivity of the circuit gradually increased and it decreased after reaching a certain number of layers. The conductivity increased rapidly with the increase of sintering temperature and it tended to be stable after slowing down when reaching a certain temperature. As the sintering time going by, the electrical conductivity of the circuit increased swiftly first and the growth trend became slower.

Published
2019
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