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A novel heterogeneous Co(Ⅱ)-Fenton-like catalyst for efficient photodegradation by visible light over extended pH

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Science China Chemistry 2020年第12期63卷 1825-1836页

作者： wu-hua Chen Jin-hua Xiong Xue Teng Jin-Xiao Mi Zhi-Biao Hu Haifeng Wang Zuofeng Chen Fujian Provincial Colleges and University Engineering Research Center of Solid Waste Resource Utilization(Longyan University) College of Chemistry and Material ScienceLongyan UniversityLongyan 364012China Shanghai Key Laboratory of Chemical Assessment and Sustainability School of Chemical Science and EngineeringTongji UniversityShanghai 200092China Key Laboratory for Advanced Materials Centre for Computational Chemistry and Research Institute of Industrial CatalysisEast China University of Science and TechnologyShanghai 200237China Department of Materials Science and Engineering College of MaterialsXiamen UniversityXiamen 361005China

A novel Co^Ⅱ-Fenton-like heterogeneous catalyst,(H3O)2[Co^Ⅱ(phen)(H2O)2]2[Mo^Ⅵ5O15(PO4)2]·4H2O (phen=1,10-phenanthroline,C12N2H8)(1),is synthesized and utilized for photocatalytic degradation of organic dyes and antibiotic in a wide range of *** experimental results show that 1 acting as the Fenton-like catalyst with H2O2 exhibits remarkable activity at pH 3–9 under vis-light irradiation and is merited with excellent recyclability and reusability.A variety of analytical methods,including in-situ electron paramagnetic resonance (EPR) spectroscopy and density functional theory (DFT) calculations,are applied to study the mechanism on generation of·OH and O2^·-radicals for photocatalytic *** suggests that,unlike the classical Fenton process involving the redox transformation of the central cations,the generation of·OH and O2^·-radicals is associated with the substitution of the coordinating water molecules at Co(Ⅱ) by H2O2 and/or OOH^-,followed by the light-driven O–O bond cleavage and *** outcomes of this study are striking which overcome the obstacles in the classical Fe^Ⅱ-Fenton process,including the slow redox transformation between Fe(Ⅱ) and Fe(Ⅲ) and the production of massive iron precipitates especially at elevated *** opens up new avenues for the development of the high-performance Fenton(-like) catalysts for photocatalytic degradation over extended pH and provides new insight into the related process.

关键词： Co^Ⅱ-Fenton-like reagent polyoxometalate photocatalytic degradation density functional theory(DFT)calculations in-situ EPR spectroscopic analysis

Simplified SEBAL method for estimating vast areal evapotranspiration with MODIS data

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Water Science and Engineering 2011年第1期4卷 24-35页

作者： Xiao-chun ZHANG Jing-wei wu hua-yi wu Yong LI State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing Wuhan University Wuhan 430079 P. R. China State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University Wuhan 430070 R R. China School of Earth Sciences and Engineering Hohai University Nanjing 210098 R R. China

The SEBAL （surface energy balance algorithm for land） model provides an efficient tool for estimating the spatial distribution of evapotranspiration, and performs a simple adjustment procedure to calculate sensible heat flux using the wind speed data set from only one weather station. This paper proposes a simplified method to modify the traditional SEBAL model for calculating the 24-hour evapotranspiration （ ETduly ） in the Haihe Basin with data from 34 weather stations. We interpolated the wind speeds using the inverse distance weighting method to establish a wind field and then used it to calculate the friction velocity directly. This process also simplifies the iterative computation process of sensible heat flux. To validate the feasibility of this simplified method, we compared the results with those obtained with an appropriate but more complex method proposed by Tasumi, which separates a vast area into several sub-areas based on the weather conditions, and runs the SEBAL model separately in each sub-area. The results show good agreement between the evapotranspiration generated by the two methods, with a coefficient of determination （r2） of 0.966, which indicates the feasibility of estimating evapotranspiration over a large region with the simplified method.

关键词： evapotranspiration SEBAL model MOD1S, remote sensing sensible heat flux Haihe Basin

Species clarification of the prize medicinal Ganoderma mushroom“Lingzhi”

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Fungal Diversity 2012年第5期56卷 49-62页

作者： Yun Cao Sheng-hua wu Yu-Cheng Dai State Key Laboratory of Forest and Soil Ecology Institute of Applied EcologyChinese Academy of SciencesShenyang 110164China Graduate University of the Chinese Academy of Sciences Beijing 100049China Department of Botany National Museum of Natural ScienceTaichung 404Taiwan Department of Plant Pathology National Chunghsing UniversityTaichung 402Taiwan e-mail:shwu@mail.nmns.edu.tw Institute of Microbiology Beijing Forestry UniversityBeijing 100083China e-mail:yuchengd@***

“Lingzhi”is a mushroom that has been renowned in China for more than 2,000 years because of its claimed medicinal properties plus its symbolic fortune.“Lingzhi”has high economic value mostly as a dietary supplement in the modern market especially in East Asia,and its medicinal functions have become a hot study *** over a century,the highly prized medicinal fungus,known as“Lingzhi”in East Asia,has been assigned to Ganoderma lucidum,a species originally described from *** studies in recent years have revealed that the commercially cultivated‘***’(“Lingzhi”)in East Asia is a different species from the true *** present study aims to clarify the species identity of“Lingzhi”based on morphological studies and analysis of rDNA nuc-ITS sequences,and additional gene fragments of mt-SSU,RPB1,RPB2,and TEF1-αof“Lingzhi”were *** Ganoderma species that mostly resemble“Lingzhi”in phylogeny and/or morphology were included for *** propose a new species *** for“Lingzhi”,which has an East Asia *** most striking characteristics which differentiate *** from *** are the presence of melanoid bands in the context,a yellow pore surface and thick dissepiments(80–120μm)at *** is most closely related to *** in phylogeny and is from North *** flexipes,***,***,*** and‘***’,are also closely related with *** and are reported from *** species are compared and discussed.‘Ganoderma tsuage’reported from China is determined as conspecific with ***,hence the distribution of *** extends from Europe to northeastern China.

关键词： Ganodermataceae Ganoderma lingzhi G lucidum Medicinal fungus Phylogeny Taxonomy

A facile synthesis of 2,3-dihydro-2-aryl-4(1H)-quinazolinones catalyzed by scandium(Ⅲ) triflate

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Chinese Chemical Letters 2007年第5期18卷 536-538页

作者： Jiu Xi Chen hua Yue wu Wei Ke Su College of Chemistry and Materials Science Wenzhou University Wenzhou 325027 China College of Pharmaceutical Sciences Zhejiang University of Technology Zhejiang Key Laboratory of Pharmaceutical Engineering Hangzhou 310014 China

2,3-Dihydro-2-aryl-4（1H）-quinazolinones were prepared in good yields via condensation of o-aminobenzamide with aldehydes promoted by a catalytic amount of Sc（OTf）3 under mild conditions.

关键词： Scandium(Ⅲ) triflate 2,3-Dihydro-2-aryl-4(1H)-quinazolinones o-Aminobenzamide

“Phonon” scattering beyond perturbation theory

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Science China(Physics,Mechanics & Astronomy) 2016年第2期59卷 28-35页

作者： wu Jie Qiu Xue Zhi Ke Li Li Xi Li hua wu Jiong Yang Wen Qing Zhang State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Department of Physics East China Normal University Materials Genome Institute Shanghai University

Searching and designing materials with intrinsically low lattice thermal conductivity （LTC） have attracted extensive considera- tion in thermoelectrics and thermal management community. The concept of part-crystalline part-liquid state, or even part-crystalline part-amorphous state, has recently been proposed to describe the exotic structure of materials with chemical-bond hierarchy, in which a set of atoms is weakly bonded to the rest species while the other sublattices retain relatively strong rigidity. The whole system inherently manifests the coexistence of rigid crystalline sublattices and fluctuating noncrystalline substructures. Representative materials in the unusual state can be classified into two categories, i.e., caged and non-caged ones. LTCs in both systems deviate from the traditional 7-1 relationship （T, the absolute temperature）, which can hardly be described by small-parameter-based perturbation approaches. Beyond the classical perturbation theory, an extra rattling-like scattering should be considered to interpret the liquid-like and sublattice-amorphization-induced heat transport. Such a kind of compounds could be promising high-performance thermoelectric materials, due to the extremely low LTCs. Other physical properties for these part-crystalline substances should also exhibit certain novelty and deserve further exploration.

关键词： part-crystalline state sublattice disorder lattice thermal conductivity

Tribological performance and chemistry of films for di-n-butyl dithiocarbamate derivatives in rapeseed oil

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Chinese Science Bulletin 2007年第2期52卷 194-199页

作者： wu hua ZENG XiangQiong LU LingBo REN TianHui School of Chemistry and Chemical Engineering Shanghai Jiaotong University Shanghai China

Two di-n-butyl dithiocarbamate derivatives were easily synthesized. Their tribological performances as lubricating oil additives in rapeseed oil were evaluated using a four-ball machine, and their chemistry of films was analyzed with X-ray absorption near-edge spectroscopy (XANES). The results indicate that the two compounds possess excellent anti-wear property and good load-carrying capacity. According to the XANES results, for the thermal films, the outer surfaces are mainly composed of N, S-containing polymer and ferric sulfate, and the near-surface and the bulk are composed of ferrous sulfate, while for the anti-wear films, the outer surfaces are only composed of ferric sulfate, but the near-surface and the bulk are mainly composed of ferrous sulfate.

关键词：摩擦学薄膜化学属性衍生物二硫代氨基甲酸酯

Application of New Water Flooding Characteristic Curve in the High Water-Cut Stage of an Oilfield

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Fluid Dynamics & Materials Processing 2022年第3期18卷 661-677页

作者： Xi Zhang Changquan Wang hua wu Xu Zhao School of Petroleum Engineering Yangtze UniversityWuhan430100China Exploration and Development Research Institute of Jianghan Oilfield Company of Sinopec Wuhan430223China

The oil production predicted by means of the conventional water-drive characteristic curve is typically affected by large deviations with respect to the actual value when the so-called high water-cut stage is *** order to solve this problem,a new characteristic relationship between the relative permeability ratio and the average water saturation is *** comparing the outcomes of different matching methods,it is verified that it can well reflect the variation characteristics of the relative permeability ratio *** the new formula with a reservoir engineering method,two new formulas are derived for the water flooding characteristic curve in the high water-cut *** practicability is verified by using the production data of Mawangmiao and Xijiakou *** results show that the error between the predicted cumulative oil production and production data of the two new water drive characteristic curves is less than the error between the B-type water drive characteristic curve and the other two water drive characteristic *** is concluded that the two new characteristic curves can be used to estimate more accurately the recoverable reserves,the final recovery and to estimate the effects of water flooding.

关键词： Water flooding characteristic curve high water cut period production dynamic prediction recoverable reserves water flooding

A regression approach to zebra crossing detection based on convolutional neural networks

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IET Cyber-Systems and Robotics 2021年第1期3卷 44-52页

作者： Xue-hua wu Renjie Hu Yu-Qing Bao School of Electrical Engineering Southeast UniversityNanjingChina School of Electrical and Automation Engineering Nanjing Normal UniversityNanjingChina

Zebra crossing detection is a fundamental function of the electronic travel *** can locate the zebra crossing and estimate its direction to help the visually impaired to cross the road *** contrast to the conventional methods,a regression approach is adopted to detect zebra crossing based on convolutional neural ***,a fixed-size window slides across the image captured at the *** image patches are sequentially fed to the logistic regression model to identify the zebra *** the image patch of zebra crossing is fed to the regression model to predict the *** parameters of models are optimized by the backpropagation algorithm before *** with existing methods,the proposed method can improve the precision-recall performance of the zebra crossing identification and reduce the root mean square error of predicted directions.

关键词： zebra neural networks

Optical Properties of Plasmon Resonances with Ag/SiO2/Ag Multi-Layer Composite Nanoparticles

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Chinese Physics Letters 2010年第6期27卷 107-109页

作者： MA Ye-Wan ZHANG Li-hua wu Zhao-Wang ZHANG Jie School of Physics and Electric Engineering Anqing Teachers College Anqing 246011

Optical properties of plasmon resonance with Ag/SiO2/Ag multi-layer nanoparticles are studied by numerical simulation based on Green＇s function theory. The results show that compared with single-layer Ag nanoparticles, the multi-layer nanoparticles exhibit several distinctive optical properties, e.g. with increasing the numbers of the multi-layer nanoparticles, the scattering efficiency red shiRs, and the intensity of scattering enhances accordingly. It is interesting to find out that slicing an Ag-layer into multi-layers leads to stronger scattering intensity and more ＂hot spots＂ or regions of stronger field enhancement. This property of plasmon resonance of surface Raman scattering has greatly broadened the application scope of Raman spectroscopy. The study of metal surface plasmon resonance characteristics is critical to the further understanding of surface enhanced Raman scattering as well as its applications.

关键词：复合纳米粒子等离子体共振光学性能表面增强拉曼散射银纳米粒子格林函数理论散射强度共振拉曼散射