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| 1 | Distribution of heavy metals in sediments of the Pearl River Estuary,Southern China:Implications for sources and historical changes显示文摘The distribution of heavy metals(Pb,Zn,Cd and As) in sediments of the Pearl River Estuary was investigated.The spatial distribution of heavy metals displayed a decreasing pattern from the turbidity maxima to both upstream and downstream of the estuary,which suggested that suspended sediments played an important role in the trace metal distribution in the Pearl River Estuary.In addition,metal concentrations were higher in the west part of the estuary which received most of the pollutants from the Pearl River.In the sediment cores,fluxes of heavy metals were consistent with a predominant anthropogenic input in the period 1970-1990.From the mid-1990s to the 2000s,there was a significant decline in heavy metal pollution.The observed decline has shown the result of pollution control in the Pearl River Delta.However,it is noteworthy that the metal concentrations in the most recent sediment still remained considerably high.Taken together,the enrichment of heavy metals in sediments was largely controlled by anthropogenic pollution. | Feng Ye Xiaoping Huang Dawen Zhang Lei Tian Yanyi Zeng | 2012 | Journal of Environmental Sciences2012，24，4： | 18 |
| 2 | A method for modeling and deciphering the persistent photoconductance and long-term charge storage of ZnO nanorod arrays显示文摘坚持的 photoconductance (PPC ) 和 ZnO nanorod 数组(NRA ) 的费用 / 精力存储的可控制性被调节 nanorod 直径试验性地表明。nanorod 直径上的 ZnO NRA 光电的特征的相关性建议在 ZnO 的 Debye 长度和光子穿入深度能空间地把独立 nanorod 划分成三个不同光电的功能的区域(PFR ) 。理论上,一系列率功能被采用动态子进程发生在不同 PFR 描述不同外来 / 内在的搬运人 photogeneration/recombination,把由 photoionized 氧空缺套住的 chemisorption/photodesorption,氧空缺光电游离,和电子与氧联系了。根据在 ZnO NRA 的光电的性质的这些不同动态子进程的联合贡献,一个彻底过程的光电的动态模型(TPDM ) 用同时的率功能被建议。通过解决率功能,相应分析方程能被采用模仿 ZnO NRA 的解决时间的 PPC 系列,然后量的参数提取了译解在 ZnO NRA 的 PPC 和费用 / 精力存储机制。这样, TPDM 模型提供了一个数字分析的方法给份量上评估 ZnO 基于 NRA 的设备的光电的性质。另外, TPDM 模型揭示了在不同 PFR 的不同 photoinduced 搬运人动力学怎么能在不同 optoelectronic 应用程序起功能的作用,例如,光电探测器,光催化剂,太阳能电池和光 nonvolatile 记忆,并且因此,它经由 PFR 的模块化的空间配置的优化为 ZnO 基于NRA 的设备的设计照亮了一条实际途径。 | Qiang Zhu Changsheng Xie Huayao Li Dawen Zeng | 2016 | Nano Research2016，9，10： | 2 |
| 3 | Enhanced photocatalytic activity of chemically bonded TiO2/graphene composites based on the effective interfacial charge transfer through the C-Ti bond显示文摘 | Huang Qingwu Tian Shouqin Zeng Dawen | 2013 | Acs Catalysis2013，3，7： | 1 |
| 4 | Characterization of Chinese vinegars by electronic nose显示文摘 | Qinyi Zhang Shunping Zhang Changsheng Xie Dawen Zeng Chaoqun Fan Dengfeng Li Zikui Bai | 2006 | Sensors & Actuators: B. Chemical2006，，2： | 1 |
| 5 | Enhanced visible light photocatalytic activity of QDS modified Bi2 WO6 nanostructures显示文摘 | CUI Zhankui ZENG Dawen TANG Tengteng LIU Jun XIE Changsheng | | 0，，： | 1 |
| 6 | Visible-light activate mesoporous WOa sensors with enhanced formalde- hyde-sensing property at room temperature显示文摘 | Deng Lubin Ding Xiaohu Zeng Dawen | 2012 | Sens Actuat B2012，163，1： | 1 |
| 7 | Effect of Zinc Doping on Microstructures and Gas-Sens-ing Properties of SnO2 Nanocrystals 显示文摘 | TIAN Shouqin GAO Yingri ZENG Dawen | 2012 | Journal of the American Ceramic Society2012，95，1： | 1 |
| 8 | A feature selection method and a sampling system for fast recognition of flammable liquids with a portable E-nose 显示文摘 | Zhang Shunping Xie Changsheng Zeng Dawen | 2007 | Sensors and Actuators B2007，，1： | 1 |
| 9 | Corrosion resisitance enhancement of Ni-reslsit ductile iron by laser surface alloying显示文摘 | Zeng Dawen | 2001 | Corrosion Resistance Enhancement2001，44，4： | 1 |
| 10 | Investigation of corrosion behavior of high nickel ductile iron by laser surface alloying with copper显示文摘 | Zeng Dawen Yung K C Xie Changsheng | 2001 | Scripta Materialia2001，44，12： | 1 |
| 11 | A Feature Extraction Method and a Sampling System for Fast Recognition of Flammable Liquids with a Portable E-Nose 显示文摘 | Zhang Shunping Xie Changsheng Zeng Dawen | 2007 | Sensors and Actuators B2007，124，： | 1 |
| 12 | Processing-structure-property relationships of Bi2WO6 nanostructures as visible-light-driven photocatalys显示文摘 | Cui Zhankui Zeng Dawen Tang Tengteng | | 0，，： | 1 |
| 13 | Numerical Simulation for Three-Dimensional (3D) Unsteady State Temperature Field in Circumferential Laser Oxygen Cutting of Pipes显示文摘A 3D unsteady state numerical model of heat transfer in the circumferential laser oxygen cutting of pipes wasdeveloped. In order to minimize the computing time required for solving the finite difference equations as much aspossible, the alternating direction implicit (ADI) method was adopted. Based on the characteristics of the pipe cuttingprocess, the periodic boundary condition was applied to calculate the temperature distribution in the θ direction andthe self-adaptive grid technology was also used. The mathematical model takes account of the temperature-dependentthermal properties of the pipe. The calculated kerfs width and the heat-affected zone (HAZ) were compared withthe experimental results. | Kaijin HUANG Dawen ZENG Changsheng XIE Desheng XU | 2003 | Journal of Materials Science & Technology2003，19，z1： | 1 |
| 14 | Corrosion resistance enhancement of Ni-resist ductile iron by laser surface alloying 显示文摘 | Zeng Dawen Xie Changsheng Hu Qianwu | 2001 | Seripta Materialia2001，44，4： | 1 |
| 15 | Recent developments of hyperspectral imaging systems and their applications in detecting quality attributes of red meats: A review显示文摘 | Xiong Zhenjie Sun Dawen Zeng Xinan | 2014 | Journal of Food Engineering2014，132，： | 1 |
| 16 | Cu+Al_2O_3 composite coating on AISI 1045 steel surface by laser cladding显示文摘Perfect composite coatings have been successfully produced with preplaced mixture of Cu+Al 2O 3(2%~20%) on AISI 1045 steel substrate by using a 2 kW CO 2 laser. A suitable amount of Al 2O 3 in Cu as additive can improve the processing conditions of laser cladding. Fe rich particles were observed in the clad layer during microstructural observation with SEM and chemical composition analysis by EDAX. The experimental results showed that microhardnesses of the coatings were over 150HV 0.05 and the electric resistivities were about 4.0×10 -8 ~4.5×10 -8 Ω·m. Perfect composite coatings have been successfully produced with preplaced mixture of Cu+Al 2O 3(2%~20%) on AISI 1045 steel substrate by using a 2 kW CO 2 laser. A suitable amount of Al 2O 3 in Cu as additive can improve the processing conditions of laser cladding. Fe rich particles were observed in the clad layer during microstructural observation with SEM and chemical composition analysis by EDAX. The experimental results showed that microhardnesses of the coatings were over 150HV 0.05 and the electric resistivities were about 4.0×10 -8 ~4.5×10 -8 Ω·m. | Wang Maoqiu(王毛球), Xie Changsheng(谢长生), Zeng Dawen(曾大文) School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China | 1999 | 中国有色金属学会会刊:英文版1999，9，3： | 0 |
| 17 | Ultrasensitive methyl salicylate gas sensing determined by Pd-doped SnO_(2)显示文摘Efficient chemicalwarfare agents(CWAs)detection is required to protect people from the cWAs in war and terrorism.In this work,a Pd-doped SnO_(2)nanoparticles-based gas sensor was developed to detect a nerve agent simulant named methyl salicylate.The sensing measurements of methyl salicylate under different Pd doping amounts found that the 0.5 at.%Pd-doped SnO_(2)exhibited a significant improvement in the detection of methyl salicylate at the ppb(1ppb=10-9)level,and the response value to 160 ppb methyl salicylate is 0.72 at 250℃.Compared with the pure SnO_(2),the response value is increased by 4.5 times,which could be attributed to the influence of the noble metal Pd on the oxygen state and its catalytic effect.In addition,the 0.5at.%Pd-doped SnO_(2)sensor still has an obvious response to 16ppb methyl salicylate with a response value of 0.13,indicating the lower detection limit of the sensor. | Chaoqi ZHU Xiang LI Xiaoxia WANG Huiyu SU Chaofan MA Xiang GUO Changsheng XIE Dawen ZENG | 2022 | Frontiers of Materials Science2022，16，4： | 0 |
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