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Synthesis of graphitic carbon nitride through pyrolysis of melamine and its electrocatalysis for oxygen reduction reaction

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Chinese Chemical Letters 2013年第2期24卷 103-106页

作者： he-Sheng Zhai Lei Cao Xing-Hua Xia Center for Scanning Electron Microscopy Xiamen University State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical Engineering.Nanjing University

Received 2 December 2012 Received in revised form 26 December 2012 Accepted 31 December 2012 Available online 4 February 2013

关键词： Melamineg-C3N4Oxygen reduction reactionElectrocatalysis

Some ω-unique and ω-ΡProperties for Linear Transformations on Hilbert Spaces

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Acta Mathematicae Applicatae Sinica 2010年第1期26卷 23-32页

作者： Xin-he Miao Zheng-hai Huang Ji-ye Han Department of Mathematics School of Science Tianjin University Tianjin 300072 China Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China

Given a real （finite-dimensional or infinite-dimensional） Hilbert space H with a Jordan product, we introduce the concepts of ω-unique and ω-P properties for linear transformations on H, and investigate some interconnections among these concepts. In particular, we discuss the ω-unique and ω-P properties for Lyapunov-like transformations on H. The properties of the Jordan product and the Lorentz cone in the Hilbert space play important roles in our analysis.

关键词： Linear complementarity problem Jordan product Lorentz cone ω-P property column sufficient property ω-uniqueness property

2D Bi2WO6/MoS2 as a new photo-activated carrier for boosting electrocatalytic methanol oxidation with visible light illumination

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Chinese Chemical Letters 2019年第12期30卷 2338-2342页

作者： Hongmin Zhang Jie he Chunyang Zhai Mingshan Zhu School of Environment Jinan UniversityGuangzhou 510632China School of Materials Science and Chemical Engineering Ningbo UniversityNingbo 315211China

In this paper,a new two-dimensional(2 D)/2 D composite of Bi2 WO6/MoS2 was facile synthesized,and then was used as supporting material for depositing Pt *** as-synthesized Pt-Bi2 WO6/MoS2 was extended into photo-assisted electrocatalytic oxidation of methanol,which is a model anode reaction for direct methanol fuel *** with traditional electrocatalytic process,PtBi2 WO6/MoS2 displays 1.5 times enhanced electrocatalytic performance on methanol oxidation with assistance of visible light irradiation and 2.2 times for commercial Pt/***,from the results of chronoamperometric and chronopotentiometry experiments,the stability of Pt-Bi2 WO6/MoS2 electrode is clearly improved under visible light *** synergistic effects of photo-and electro-catalytic in the heterojunction of Pt-Bi2 WO6/MoS2 in favor of the above *** research gives more insights in the fields of photo-assisted traditional electrocatalytic application by constructing of semiconductor heterojunction carrier.

关键词： Methanol oxidation Bi2WO6 MoS2 Visible light Electrocatalysis

Effect of Complex Agents on Structure and Activity of Fe-Substituted Rare Earth hexaaluminate Catalysts for Methane Combustion

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Journal of Rare Earths 2004年第Z1期22卷 181-184页

作者： Wu Peng Hu Ruisheng Long Zerong Meng he College of Chemistry and Chemical Engineering Inner Mongolia University Hohhot 010021 China College of Chemistry and Chemical Engineering Inner Mongolia University Hohhot 010021 China College of Chemistry and Chemical Engineering Inner Mongolia University Hohhot 010021 China College of Chemistry and Chemical Engineering Inner Mongolia University Hohhot 010021 China

A series of catalysts were prepared by using complex sol-gel *** results confirm the effect of different agents on structure and activity of Fe-substituted rare earth hexaaluminate catalyst (LaFeAl11 O19 ) for methane *** catalyst is yielded by complex sol-gel, respectively using three different complex agents (maltose, glucose and citric acid).XRD demonstrated that haxaaluminate is the major phase of catalyst prepared by maltose,while LaAlO3 is the major one of the catalyst by glucose and citric *** the same time, there is a little LaFeO3 and surface areas as well as 29.5 nm particle diameter when the complex agent is ***, T10 ( temperature for 10% conversion of methane) and T100 ( temperature for 100% conversion of methane) for catalyst by glucose is 543 and 758 ℃, which is the best among the three complex agents for methane combustion.

关键词： hexaaluminate sol-gel methane combustion complex agent rare earths

VLW equation of state of detonation products

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Science China Chemistry 2009年第5期52卷 605-608页

作者： WU Xiong LONG XinPing he Bi JIANG XiaoHua Xi’an Modern Chemistry Research Institute Xi’an 710065China China Academy of Engineering Physics Mianyang 621900China Institute of Chemical Materials CAEPMianyang 621900China

Based on the virial theory, we proposed VLW equation of state of detonation products (VLW EOS). Its basic theory and applications were described. The distinct features of the VLW EOS were:First, the detonation performance of the new high energy density materials could be predicted more reliably. Second, it had extensive application. The detonation parameters of both the condensed high energy density materials and the gaseous fuel air explosives could be calculated. Moreover, combustion performance of propellants could also be precisely calculated. The calculation results were satisfactory.

关键词： virial coefficients energetic materials equation of state detonation

A New Triterpenoid from “Gualou-xiebai-baijiu-tang” Consisting of Fructus trichosanthis and Bulbus allii macrostemi

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Chinese Chemical Letters 2002年第7期13卷 637-640页

作者： Xiang Jiu he Feng QIU Xin Sheng YAO Department of Natural Products Chemistry Shenyang Pharmaceutical UniversityShenyang 110016

A new triterpenoid saponin was isolated by bioactivity-guided isolation from 揋ualou-xiebai-baijiu-tang?consisting of Fructus trichosanthisi and Bulbus allii macrostemi. Its structure was determined as 3-O-b-D-galactopyranosylhederagenin 28-O-b-D-xylopyranosyl (16)- b-D-galactopyranosyl ester by means of chemical evidences and spectral analysis.

关键词： "Gualou-xiebai-baijiu-tang" 3-O-β-D-galactopyranosylhederagenin 28-O-β-D-xylopyranosyl(1→6)- β-D-galactopyranosyl ester Triterpenoid saponin

Initial Rifting Age of the Nearly N–S Rifts in Southern Tibetan Plateau:New Evidence from the Age limit of the Early Sediments

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Acta Geologica Sinica(English Edition) 2017年第2期91卷 739-740页

作者： HA Guanghao WU Zhonghai he Lin WANG Shubing Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China Key Laboratory of Neotectonic Movement&Geohazard Ministry of Land and ResourcesBeijing 100081China Chinese Academy of Geological Sciences Beijing 100037China College of Earth Science and Resources China University of Geosciences(Beijing)Beijing 100083China

Objective The nearly parallel N-S-trending rifts in southern Tibet represent the E-W extension of the Tibet Plateau. Most data which constrained the age of the extensional deformation come from isotopic dating of the dikes probably related to the activity of the nearly N-S faulting and micas from hydrothermal activity and the low- temperature thermochronology of plateau uplift. Previous research shows that there are at least three different ideas about the age of the rifts：（1） older than 16-12 Ma, （2） 14- 10 Ma, and （3） 8-4 Ma （Fig. la）. For the old sedimentary strata represented the beginning of the rifting, the dating of the sediments helps to better define the initial rifting age.

关键词： Initial Rifting Age of the Nearly N S Rifts in Southern Tibetan Plateau:New Evidence from the Age limit of the Early Sediments

Construction of a mutant of Actinoplanes sp. N902-109 that produces a new rapamycin analog

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Chinese Journal of Natural Medicines 2018年第3期16卷 210-218页

作者： HUANG he GAO Ping ZHAO Qi HU Hai-Feng Shanghai Institute of Pharmaceutical Industry Shanghai 201203 China Institute of Plant Physiology and Ecology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200032 China

In the present study, we introduced point mutations into Ac_rap A which encodes a polyketide synthase responsible for rapamycin biosynthesis in Actinoplanes sp. N902-109, in order to construct a mutant with an inactivated enoylreductase(ER) domain, which was able to synthesize a new rapamycin analog. Based on the homologous recombination induced by double-strand breaks in chromosome mediated by endonuclease I-SceI, the site-directed mutation in the first ER domain of Ac_rapA was introduced using non-replicating plasmid pL YERIA combined with an I-SceI expression plasmid. Three amino acid residues of the active center, Ala-Gly-Gly, were converted to Ala-Ser-Pro. The broth of the mutant strain SIPI-027 was analyzed by HPLC and a new peak with the similar UV spectrum to that of rapamycin was found. The sample of the new peak was prepared by solvent extraction, column chromatography, and crystallization methods. The structure of new compound, named as SIPI-rapxin, was elucidated by determining and analyzing its MS and NMR spectra and its biological activity was assessed using mixed lymphocyte reaction(MLR). An ER domain–deficient mutant of Actinoplanes sp. N902-109, named as SIPI-027, was constructed, which produced a novel rapamycin analog SIPI-rapxin and its structure was elucidated to be 35, 36-didehydro-27-O-demethylrapamycin. The biological activity of SIPI-rapxin was better than that of rapamycin. In conclusion, inactivation of the first ER domain of rap A, one of the modular polyketide synthase responsible for macro-lactone synthesis of rapamycin, gave rise to a mutant capable of producing a novel rapamycin analog, 35, 36-didehydro-27-O-demethylrapamycin, demonstrating that the enoylreductase domain was responsible for the reduction of the double bond between C-35 and C-36 during rapamycin synthesis.

关键词： Actinoplanes sp. N902-109 Rapamycin Structural analog Polyketide synthase Enoylreductase

Effects of Different Electrolytes on Stress Corrosion Properties of 2A12 Aluminum Alloy

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Journal of Wuhan University of Technology(Materials Science) 2021年第3期36卷 400-406页

作者： JIANG Gen BAI Zhenhai LUO Binghui WANG Shuai he Chuan School of Materials Science and Engineering Central South UniversityChangsha 410083China Key Laboratory for Nonferrous Ma-terials(MOE) Changsha 410083China

The stress corrosion cracking(SCC)behaviors of 2A12 aluminum alloy after annealing treatment were studied by slow strain rate testing(SSRT),electrochemical polarization measurement,scanning electron microscope(SEM),energy dispersive spectrometer(EDS)and transmission electron microscopy(TEM).Various concentrations of NaCl,H_(2)SO_(4)and HCl aqueous solution were prepared to act as the corrosive *** experimental results show that regarding the SCC,2A12 alloy performs best in NaCl solution but worst in HCl solution and intermediately between the above mentioned two cases in H_(2)SO_(4)*** the SSRT carried out in room temperature,there is a higher decrease in elongation without large strength loss for the alloy immersed in NaCl *** the test conducted in H_(2)SO_(4)solution,there is a higher strength loss and a relatively less loss of elongation compared to the one immersed in NaCl *** the test conducted in HCl solution,there is a relativel level loss of strength and elongation compared to either result carried out in NaCl solution or H_(2)SO_(4)solution.

关键词： 2A12 aluminum alloy stress corrosion cracking corrosive electrolyte SSRT