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You searched for: Author "Li, Shuangming" Remove constraint Author: "Li, Shuangming" Subject X-ray diffraction Remove constraint Subject: X-ray diffraction
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1. Nitrogen-doped graphene nanosheets as metal-free catalysts for dehydrogenation reaction of ethanol

Author:
Li, Shuangming,   et al.   ; Wang, Wenping; Liu, Xia; Zeng, Xiaoliang; Li, Wenxiu; Tsubaki, Noritatsu; Yu, Sansan;     Show all 7 Authors
Source:
RSC advances 2016 v.6 no.16 pp. 13450-13455
ISSN:
2046-2069
Subject:
Raman spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; acetaldehyde; byproducts; catalysts; catalytic activity; dehydrogenation; ethanol; graphene; graphene oxide; nanosheets; nitrogen; scanning electron microscopy; temperature; transmission electron microscopy; urea
Abstract:
... The catalytic performance of nitrogen-doped graphenes for the dehydrogenation of ethanol is investigated in this study. N-Doped graphene is synthesized by using urea and graphene oxide as nitrogen source and precursor, respectively. XRD, Raman spectra, XPS, SEM and HRTEM are utilized to characterize the structure of the synthesized N-doped graphenes. XPS reveals that the doped nitrogens on the sur ...
DOI:
10.1039/c5ra20471b

2. Synthesis of octahedral and cubic Cu2O microcrystals in sub- and super-critical methanol and their photocatalytic performance

Author:
Li, Shuangming,   et al.   ; Ge, Xin; Jiang, Shengnan; Peng, Xiaona; Zhang, Zhe; Li, Wenxiu; Yu, Sansan;     Show all 7 Authors
Source:
Journal of materials science 2015 v.50 no.11 pp. 4115-4121
ISSN:
0022-2461
Subject:
temperature; X-ray photoelectron spectroscopy; X-ray diffraction; methanol; feeding methods; photolysis; scanning electron microscopy; methyl orange; cuprous oxide; photocatalysts
Abstract:
... A simple and potentially scalable sub- and super-critical methanol technique was applied to synthesize cuprous oxide. Cu₂O microcrystals with two morphologies were obtained in methanol of subcritical domain by adjusting the feeding methods. The effects of the reaction time, temperature, pressure, and feeding method on the formation of Cu₂O microcrystals were investigated. XRD, SEM, and XPS were ap ...
DOI:
10.1007/s10853-015-8967-3

3. Influence of Reducing Atmosphere of Subcritical/Supercritical Mild Alcohols on the Synthesis of Copper Powder

Author:
Li, Shuangming,   et al.   ; Yu, Sansan; Ge, Xin; Niu, Mingju; Zhang, Hao; Xu, Can; Li, Wenxiu;     Show all 7 Authors
Source:
Industrial & Engineering Chemistry Research 2014 v.53 no.6 pp. 2238-2243
ISSN:
1520-5045
Subject:
X-ray diffraction; chemistry; copper sulfate; cupric oxide; engineering; ethanol; methanol; reducing agents; scanning electron microscopy; temperature
Abstract:
... Copper powder with different size was synthesized using subcritical/supercritical mild alcohols without additional reductant. The interaction influence of the reducing atmosphere, including temperature, pressure, precursors, and alcohol types, was investigated. XRD and SEM were applied to analyze the composition and morphology of products synthesized. Results showed that the reducing atmosphere fo ...
DOI:
10.1021/ie402133y