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24篇 您的检索式:作者名="Pingwu"
    题名 作者 年代 出处 被引量
1A New Anthranquinone Glycoside from the Seeds of Cassia obtusifolia显示文摘A new anthraquinone glycoside, emodin-l-O-β-gentiobioside 1, together with three known compounds, chrysophanol-l-O-β-gentiobioside 2, physcion-8-O-β-gentiobioside 3, and chrysophanol- 1-O-β-D-glucopyranosyl-( 1 → 3)-β-D-glucopyranosyl-( 1→6)-β-D-glucopyranoside 4 was isolated from the seeds of Cassia obtusifolia. Its structure was elucidated on the basis of spectroscopic evidence.ChuHuaLI XiaoYiWEI XuELI PingWU BaoJiangGUO 2004Chinese Chemical Letters2004,15,12:11
2Highly efficient and selective photocatalytic dehydrogenation of benzyl alcohol for simultaneous hydrogen and benzaldehyde production over Ni-decorated Zn_(0.5)Cd_(0.5)S solid solution显示文摘Photocatalytic conversion of solar energy into hydrogen and high value-added fine chemicals has attracted increasing attention. Herein, we demonstrate an efficient photocatalytic system for simultaneous hydrogen evolution and benzaldehyde production by dehydrogenation of benzyl alcohol over Nidecorated Zn_(0.5)Cd_(0.5)S solid solution under visible light. The photocatalytic system shows an excellent hydrogen production rate of 666.3 μmol h^(-1) with high stability. The optimal apparent quantum yield of52.5% is obtained at 420 nm. This noble-metal-free photocatalytic system displays much higher activity than pure Zn_(0.5)Cd_(0.5)S and Pt-loaded Zn_(0.5)Cd_(0.5)S solid solution. Further studies reveal that the metallic Ni nanocrystals play an important role in accelerating the separation of photogenerated charge carriers and the subsequent cleavage of α-C–H bond during dehydrogenation of benzyl alcohol.Lei Zhang Daochuan Jiang Rana Muhammad Irfan Shan Tang Xin Chen Pingwu Du 2019Journal of Energy Chemistry2019,28,3:5
3Internal Friction and Elastic Study on Surface Nanocrystallized 304 Stainless Steel Induced by High-energy Shot Peening显示文摘The 304 stainless steel with nanostructured surface layer was successfully obtained by using the high-energy shot peening (HESP) method. The internal friction and Young's modulus of this kind of surface nanocrystallized material were dynamically measured by means of the vibrating reed apparatus. The results implied that different treatment time could induce different microstructure and distribution characteristic of defects in this kind of materials. It is also demonstrated that there is a transition layer between the nano-layer on surface and the coarse grain region inside. The transition layer obviously has certain influence on the overall mechanical properties.PingWU JingyangWANG2002Journal of Materials Science & Technology2002,18,2:4
4Nitrogen photofixation on holey g-C3N4 nanosheets with carbon vacancies under visible-light irradiation显示文摘Nitrogen photo fixation using g-C3N4-based photocatalysts have attracted abundant of attentions recently.Herein,in this study,holey g-C3N4(HGCN)nanosheets possess a good deal of carbon vacancies were prepared by means of thermally treating bulk g-C3 N4(BGCN)under an NH3 atmosphere.Characterization analysis revealed that the as-synthesized sample have identical crystal structure,la rger BET specific surface area,stronger reduction capability,and higher photogene rated charge carrier separation rate than that of BGCN.These properties may contribute to enhance the nitrogen photofixation activity.It was also found that the rate of NH4^+production for N2 photofixation of HGCN sample reached^25.54 mg L^-1 h^-1 g(cat)^-1,which is approximately^5.87 times higher than that of BGCN sample under optimal reactive conditions.Moreover,a plausible mechanism of HGCN for nitrogen photofixation process was illuminated in detail.Jianhua Ge Long Zhang Jing Xu Yujie Liu Daochuan Jiang Pingwu Du 2020Chinese Chemical Letters2020,31,3:4
5A molecular cobaloxime cocatalyst and ultrathin FeOOH nanolayers co-modifiedBiVO_(4) photoanode for efficient photoelectrochemical water oxidation显示文摘BiVO_(4) has been attracting a lot of interest in photoelectrochemical (PEC) water oxidation due to its efficient solar absorption and appropriate band positions.So far,sluggish water oxidation kinetics and fast photogenerated charge recombination still hinder the PEC performance ofBiVO_(4) .In this study,a novel PEC photoanode was designed by depositing ultrathin FeOOH nanolayers on the surface of nanoporousBiVO_(4) electrode,followed by modification with a cobaloxime (Co(dmgH)_(2)(4-COOH-py)Cl) molecular cocatalyst.Under irradiation of a 100 mW cm^(-2)(AM 1.5G) Xe lamp,the photocurrent density of the cobaloxime/FeOOH/BiVO_(4) composite photoanode reached 5.1 mA cm^(-2)at 1.23 V vs.RHE in 1.0 M potassium borate buffer solution (pH=9.0).The onset potential of the optimal cobaloxime/FeOOH/BiVO_(4) photoanode exhibited a 460 m V cathodic shift relative to bareBiVO_(4) .In addition,the surface charge injection efficiency of the composite photoanode reached~80%at 1.23 V vs.RHE and the incident photon-to-current efficiency (IPCE) reached~88%at 420 nm.Hongyun Cao Taotao Wang Jiaxing Li Jinbao Wu Pingwu Du 2022Journal of Energy Chemistry2022,31,6:3
6Dihydrochalcones from Symplocos vacciniifolia显示文摘A new dihydrochalcone glucoside, vacciniifolin, along with confusoside, trilobatin and sieboldin were isolated from the leaves of Symplocos vacciniifolia. By the method of spectral analysis, this new compound was elucidated as 2 3,4,4 -tetrahydroxydihydrochalcone 4 -O-a-D-glu- , copyranoside.TieJunLING LiDongLIN PingWU WenHuaZHOU HuaGuYE MeiFangLIU XiaoYiWEI 2004Chinese Chemical Letters2004,15,10:2
7OsSPX1 suppresses the function of OsPHR2 in the regulation of expression of OsPT2 and phosphate homeostasis in shoots of rice显示文摘FangLiu ZhiyeWang HongyanRen ChenjiaShen YeLi Hong‐QingLing ChangyinWu XingmingLian PingWu 2010The Plant Journal2010,,3:1
8Direct analysis of titanium dioxide solid powder by fluorination assisted electrothermal vaporization inductively coupled plasma atomic emission spectrometry显示文摘Peng Tianyou Du Pingwu Hu Bin Jiang Zucheng 2000Analytica Chimica Acta2000,,1:1
9Damage mechanics model of top coal in steep top caving coal显示文摘Shi Pingwu Lai Xingping 0,,01:1
10Synthesis and Enhanced Electrochemical Catalytic Performance of Monolayer WS2(1– x )Se2 x with a Tunable Band Gap显示文摘Qi Fu Lei Yang Wenhui Wang Ali Han Jian Huang Pingwu Du Zhiyong Fan Jingyu Zhang Bin Xiang 2015Adv. Mater2015,,32:1
11Surface-particle-emulsion heat transfer model between fluidized bed and horizontal immersed tube显示文摘A mathematical model, surface-particle-emulsion heat transfer model, is presented by considering voidage variance in emulsion in the vicinity of an immersed surface. Heat transfer near the surface is treated by dispersed particles touching the surface and through the emulsion when the distance from the surface is greater than the diameter of a particle. A film with an adjustable thickness which separates particles from the surface is not introduced in this model. The coverage ratio of particles on the surface is calculated by a stochastic model of particle packing density on a surface. By comparison of theoretical solutions with experimental data from some References, the mathematical model shows better qualitative and quantitative prediction for local heat transfer coefficients around a horizontal immersed tube in a fluidized bed.PingWu XuFeng2002Journal of University of Science and Technology Beijing2002,9,2:1
12Photocatalytic property of ZnTiO3-TiOz nanq-composite materials 显示文摘Su Bitao Zhu Pingwu Xu Jingjing 2011Chinese J Appl Chem2011,28,1:1
13Application of Heat Pipe Heat Exchangers to Humidity Control in Air-Conditioning Systems 显示文摘XIAO Pingwu Peter Johnson 1997Applied Thermal Engineering1997,17,6:1
14Choosing the kernel parame- ters for support vector machines by the inter - cluster dis- tance in the feature space 显示文摘Kuo PingWu Sheng DeWang 2009Pattern Recognition2009,,42:1
15Transcription expression and clinical significance of vascular endothelial growth factor mRNA and endostatin mRNA in pleural effusions of patients with lung cancer显示文摘YingChen BinLiang Yu‐JieZhao Shao‐ChengWang Yi‐BoFan Guang‐PingWu 2012Diagn Cytopathol2012,,4:1
16Inheritance of seeds per silique in Brassica napus L. using joint segregation analysis显示文摘Liwu Zhang Pingwu Liu Dengfeng Hong Anqun Huang Shipeng Li Qingbiao He Guangsheng Yang 2009Field Crops Research2009,,1:1
17Synthesis of an all-carbon conjugated polymeric segment of carbon nanotubes and its application for lithium-ion batteries显示文摘The synthesis and potential applications of nanocarbon materials have attracted much attention in recent years.Herein,we report the design and synthesis of a novel all-carbon conjugated polymeric segment of single-walled carbon nanotubes(poly(cyclo-para-phenylene)(PCPP))and its first application as an anode material for lithium-ion batteries.The as-synthesized PCPP was characterized by Raman spectroscopy,Fourier transform infrared(FTIR),and other spectroscopies.The electrochemical characterization results show the suitability of PCPP as an anode material for lithium-ion batteries.Theoretical calculations indicate the unique structural and physical properties of PCPP.The realization of PCPP expands the scope of bottom-up synthesis of uniform carbon nanotube segments and their potential applications as new materials for lithium-ion batteries.Shengda Wang Fei Chen Guilin Zhuang Kang Wei Tianyun Chen Xinyu Zhang Chunhua Chen Pingwu Du 2023Nano Research2023,16,7:0
18A Survey Report on Sugarcane Production in Guangxi Zhuang Autonomous Region in 2013显示文摘In order to fully understand sugarcane production in Guangxi in 2013,the sample survey combined with data collection and field survey was carried out in sugarcane production areas in Nanning,Hechi,Liuzhou,Chongzuo,Baise and Laibin from May 28 to June 36 in2013. It was found that the sugarcane growing area in Guangxi in 2013 declined compared with that in 2012; the rate of emergence remained the same as previous year,and as for the plant number of plant crop and ratoon crop per hectare,there was a decline of 4000 and 2000 seedlings respectively compared with the figure in 2012; borer damage rate declined on the whole while the incidence of sugarcane smut increased.Due to the growth in the cost of planting,the growers were less enthusiastic for management. According to the findings,the fertilization and sugarcane field management should be accelerated; borer prevention work was also required,so as to reduce borer damage and dieback rate;the planting structure of varieties had to be adjusted and the cultivated area of ' Guitang' as a fine sugarcane variety should also be enlarged;meanwhile other active measures needed to be taken to prevent and control the outburst of pest attack in local areas.Xiang LI Yangrui LI Yuchi DENG Lunwang WANG Liu YANG Weihua HUANG Qiang LIANG Ronghua ZHANG Guoying LU Shijian HAN Pingwu LIU Changning LI Cuifang YANG 2014Asian Agricultural Research2014,6,12:0
19Pomegranate-like C_(60)@cobalt/nitrogen-codoped porous carbon for high-performance oxygen reduction reaction and lithium-sulfur battery显示文摘Porous carbon materials play essential roles in electrocatalysis and electrochemical energy storage.It is of significant importance to rationally design and tune their porous structure and active sites for achieving high electrochemical activity and stability.Herein,we develop a novel approach to tune the morphology of porous carbon materials(PCM)by embedding fullerene C_(60),achieving improved performance of oxygen reduction reaction(ORR)and lithium-sulfur(Li-S)battery.Owing to the strong interaction between C_(60)and imidazole moieties,pomegranate-like hybrid of Ow-embedded zeolitic imidazolate framework(ZIF-67)precursor is synthesized,which is further pyrolyzed to form C_(60)-embedded cobalt/nitrogen-codoped porous carbon materials(abbreviated as C_(60)@Co-N-PCM).Remarkably,the unique structure of C_(60)@Co-N-PCM offers excellent ORR electrocatalytic activity and stability in alkaline solutions,outperforming the commercial Pt/C(20 wt.%)catalyst.Besides,C_(60)@Co-N-PCM as a novel cathode delivers a high specific capacity of-900 mAh·g^(-1) at 0.2 C rate in Li-S batteries,which is superior to the pristine ZIF-67-derived PCM without embedding C_(60).Jianhua Wu Shiyang Wang Zhanwu Lei Runnan Guan Muqing Chen Pingwu Du Yalin Lu Ruiguo Cao Shangfeng Yang 2021Nano Research2021,14,8:0
20Temperature distribution and control in liquefied petroleum gas fluidized beds显示文摘Temperature distribution and control have been investigated in a liquefied petroleum gas (LPG) fluidized bed with hollow corundum spheres (A12O3) of 0.867-1.212 mm in diameter at moderately high temperatures (800-1100℃). Experiments were carried out for the air consumption coefficient α in the range of 0.3 to 1.0 and the fluidization number N in the range of 1.3 to 3.0. Particle properties, initial bed height, α and N all affect temperature distribution in the bed. Bed temperature can be adjusted about 200℃ by combined the adjusting of α and N.LiWang PingWu YanpingZhang JingYang LigeTong 2004Journal of University of Science and Technology Beijing2004,11,3:0
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