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Self-supported NiFe-LDH nanosheets on NiMo-based nanorods as high-performance bifunctional electrocatalysts for overall water splitting at industrial-level current densities

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Nano Research 2024年第5期17卷 3769-3776页

作者： Yan Zhang Biao Feng MingLei Yan Zhen Shen Yiqun Chen Jingyi Tian Fengfei Xu Guanghai Chen Xizhang wang Lijun Yang Qiang Wu Zheng Hu Key Laboratory of Mesoscopic Chemistry of Ministry of Education(MOE)and Jiangsu Provincial Lab for Nanotechnology School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China College of Water Conservancy and Hydropower Engineering Sichuan Agricultural UniversityYa’an 625014China

Efficient,durable and economic electrocatalysts are crucial for commercializing water electrolysis ***,we report an advanced bifunctional electrocatalyst for alkaline water splitting by growing NiFe-layered double hydroxide(NiFe-LDH)nanosheet arrays on the conductive NiMo-based nanorods deposited on Ni foam to form a three-dimensional(3D)architecture,which exhibits exceptional performances for both hydrogen evolution reaction(HER)and oxygen evolution reaction(OER).In overall water splitting,only the low operation voltages of 1.45/1.61 V are required to reach the current density of 10/500 mA·cm^(-2),and the continuous water splitting at an industrial-level current density of 500 mA·cm^(-2) shows a negligible degradation(1.8%)of the cell voltage over 1000 *** outstanding performance is ascribed to the synergism of the HER-active NiMo-based nanorods and the OER-active NiFe-LDH nanosheet arrays of the hybridized 3D ***,the dense NiFe-LDH nanosheet arrays enhance the local pH on cathode by retarding OH-diffusion and enlarge the electrochemically active surface area on anode,while the conductive NiMo-based nanorods on Ni foam much decrease the charge-transfer resistances of both *** study provides an efficient strategy to explore advanced bifunctional electrocatalysts for overall water splitting by rationally hybridizing HER-and OER-active components.

关键词： alkaline water splitting bifunctional electrocatalysts layered double hydroxides high durability industrial current densities

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Control of redox potential by oxygen limitation in selective bioleaching of chalcocite and pyrite

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Rare Metals 2014年第5期33卷 622-627页

作者： Biao Wu Jian-Kang wen Bo-wei Chen Guo-Cheng Yao Dian-zuo wang National Engineering Laboratory of Biohydrometallurgy General Research Institute for Nonferrous Metals

Based on the bioleaching mechanism and electrochemical studies of metal sulfides, the dissolution rates of chalcocite and pyrite are controlled by redox potentials. Experiment on the bioleaching of chalcocite and pyrite under constant redox potential by sparging with nitrogen gas was demonstrated. By leaching at low and constant redox potential（〈760 mV, vs SHE）, copper recoveries of 90 %–98 % are achieved, which are 10 times more than iron recoveries. The iron-oxidizing bacterial populations are observed to continue to reduce under oxygen limitation conditions, but the Acidithiobacillus that have only sulfur-oxidizing capabilities are an attractive alternative for redox-controlled bioleaching of ***, the described redox control technique might be one of the effective approaches to balance acid and iron in Zijinshan copper bio-heap leaching practice.

关键词： Pyrite Chalcocite Bioleaching Redox potential Oxygen limitation

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基于再分析数据的南海三维温盐结构特征分析

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数字海洋与水下攻防 2024年第1期7卷 62-71页

作者：谷浩然杨俊钢王斌崔伟陈前自然资源部海上丝路海洋资源环境组网观测技术创新中心中国石油大学(华东)海洋与空间信息学院自然资源部第一海洋研究所

掌握南海三维温盐场特征对于研究南海海洋动力环境及其对海洋气候变化的影响具有重要意义。基于海洋再分析数据GLORYS12V1和AVHRR OISST数据，开展了南海温盐空间分布及季节变化分析，以及海表温度对台风过程的响应特征分析。分析结果... 详细信息

掌握南海三维温盐场特征对于研究南海海洋动力环境及其对海洋气候变化的影响具有重要意义。基于海洋再分析数据GLORYS12V1和AVHRR OISST数据，开展了南海温盐空间分布及季节变化分析，以及海表温度对台风过程的响应特征分析。分析结果表明：南海海表温度一般为25～32℃，最高温度出现在8月的黄岩岛附近海域，海表盐度一般为32～35 psu，最高盐度出现在7月的东海附近海域；温盐垂向结构表现为表层高温低盐，随着深度增加温盐季节性变化越小。南海地区温跃层深度存在明显季节变化特征，秋冬季节温跃层深度大于春夏两季。根据“威马逊”台风期间海表温度变化特征分析海表温度对台风过程的响应，台风期间南海水体垂向混合作用增强，海表温度降温明显。

关键词：南海三维温盐海洋再分析数据

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QoE-Driven Energy-Aware Multipath Content Delivery Approach for MPTCP-Based Mobile Phones

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China Communications 2017年第2期14卷 90-103页

作者： Yuanlong Cao Shengyang Chen Qinghua Liu Yi zuo Hao wang Minghe Huang School of Software Jiangxi Normal University Nanchang 330022 China Performance Engineering Laboratory Dublin City University Ireland Jiangxi innovation funds management center for small and medium-sized enterprises Nanchang 330046 China

Mobile phones equipped with multiple wireless interfaces can increase their goodput performance by making use of concurrent transmissions over multiple paths, enabled by the Multipath TCP （MPTCP）. However, utilizing MPTCP for data delivery may generally result in higher energy consumption, while the battery power of a mobile phone is limited. Thus, how to optimize the energy usage becomes very crucial and urgent. In this paper, we propose MPTCP-QE, a nov- el quality of experience （QoE）-driven energy-aware multipath content delivery approach for MPTCP-based mobile phones. The main idea of MPTCP-QE is described as follows： it first provides an application rate-aware energy-efficient subflow management strategy to tradeoff throughput performance and energy consumption for mobile phones; then uses an available bandwidth-aware congestion window fast recovery strategy to make a sender avoid unnecessary stow-start and utilize wireless resource quickly; and further introduces a novel receiver-driven energy-efficient SACK strategy to help a receiver possible to detect SACK loss timely and trigger loss recovery in a more energy-efficient way. The simulation results show that with the MPTCP-QE, the energy usage is enhanced while the performance level is maintained compared to existing MPTCP solutions.

关键词： energy consumption video transport multipath TCP traffic offioading

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Biochar Decreases Soil Cadmium(Cd) Availability and Regulates Expression Levels of Cd Uptake/Transport-Related Genes to Reduce Cd Translocation in Rice

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Rice science 2024年第5期31卷 494-498,I0006-I0013页

作者： wang Han HUANG Qina ZHANG Yan SHAO Guosheng HU Yijun XU Youxiang China National Rice Research Institute Hangzhou 310006China Jiangshan Agriculture and Rural Affairs Bureau Quzhou 324100China Longyou Agriculture and Rural Affairs Bureau Quzhou 324400China

Biochar has been used as a soil amendment for heavy metal-contaminated soils, and it has the potential to mitigate Cd accumulation in plants. In this study, we used rice straw biochar(RSB) and kitchen waste biochar(KWB) to clarify the effect of biochar on Cd-contaminated neutral soil, the physiological responses to biochar application, and the gene regulatory networks in a rice genotype.

关键词： soil straw soils

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Recently Ratified and Proposed Cambrian Global Standard Stratotype-section and Points

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Acta Geologica Sinica(English Edition) 2011年第2期85卷 296-308页

作者： PENG Shanchi ZHU Xuejian zuo Jinxun LIN Huanling CHEN Yong＇an wang Longwu State Key Laboratory of Paleobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology the Chinese Academy of Sciences Nanjing 210008 China Henan Institute of Geological Survey Zhengzhou 450007 China No. 405 Geological Team of Hunan Bureau of Geology and Mineral Resources Jishou 416007 China Geological Surveying Institution of Zhejiang Province Xiaoshan 311203 China

This paper briefly summarizes an officially ratified Global Standard Stratotype-section and Point （GSSP） and a proposed GSSP for global stages of the Cambrian System. The Luoyixi section near Luoyixi town, Guzhang, northwestern Hunan is ratified as the boundary stratotype for the base of the global Guzhangian Stage, which is the upmost stage of an unnamed series termed provisionally as Cambrian Series 3. The GSSP position lies 121.3 m above the base of the Huaqiao Formation in the section, coinciding with the first appearance of the cosmopolitan agnostoid trilobite Lejopyge *** Duibian B section at Duibian village, Jiangshan, western Zhejiang, is proposed as the boundary stratotype for the base of the proposed global Jiangshanian Stage that is the second stage of the Furongian Series. The proposed GSSP position lies 108.12 m above the base of the Huayansi Formation in the section, coinciding with the first appearance of the cosmopolitan agnostoid trilobite Agnostotes orientalius. This horizon is also with the first appearance of the cosmopolitan polymerid trilobite lrvingella angustilimbata.

关键词： Global Standard Stratotype-section and Point Guzhangian Stage Luoyixi section proposed Jiangshanian Stage Duibian B section Cambrian System

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Characterizing the maturity of highly evolved organic matter based on aromatic hydrocarbons and optimization with pyrobitumen reflectance and Raman spectral parameters

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Science China Earth Sciences 2022年第12期65卷 2335-2357页

作者： Zhaoxi zuo Jian CAO wenxuan HU Chunhua SHI Xiaolin wang Suping YAO Bing LUO State Key Laboratory for Mineral Deposits Research School of Earth Sciences and EngineeringNanjing UniversityNanjing 210023China Chongqing Gas Field of PetroChina Southwest Oil and Gas Field Company Chongqing 401120China

Maturity evaluation of highly evolved organic matter is an important problem in oil and gas geochemistry,because conventional organic geochemical proxies are not applicable due to hydrocarbon generation and *** this study,we investigated the pyrobitumen in the reservoirs of the Sinian Dengying Formation in the Sichuan Basin,*** focused on aromatic hydrocarbon biomarkers,and the calibration and application of aromatic maturity proxies using pyrobitumen reflectance and Raman spectral *** results show that only the thiophene compounds are effective maturity indicators,such as MDR(4-/1-MDBT),MDR′(4-MDBT/(1-MDBT+4-MDBT)),MDR1(1-MDBT/DBT),4,6-/(1,4+1,6)-DMDBT,(2,6+3,6)-/(1,4+1,6)-DMDBT,and[2,1]BNT/([2,1]BNT+[1,2]BNT),as these are largely independent of the optical anisotropy of *** condensation and incorporation of thiophene compounds can lead to an increase in the reflectance of pyrobitumen,which means the thiophene compound parameters are positively or negatively correlated with pyrobitumen *** potential maturity parameters were proposed,including DMDBTs/MDBTs,TeMDBTs/(DBT+MDBTs+DMDBTs+TMDBTs+TeMDBTs),1-MDBT/MDBTs,and[2,1]BNT/*** method and these parameters are universally applicable to maturity characterization,especially in rocks that lack vitrinite,contain strongly anisotropic organic matter,and have high contents of thiophene compounds.

关键词： Maturity characterization of high-evolution organic matter Reservoir pyrobitumen Optical texture Dengying Formation Sichuan Basin

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Enhanced Current Transportation in Siliconriched Nitride(SRN)/Silicon-riched Oxide(SRO)Multilayer Nanostructure

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Nano-Micro Letters 2012年第4期4卷 202-207页

作者： Yeliao Tao Jun Zheng Yuhua zuo Chunlai Xue Buwen Cheng Qiming wang State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences

A novel structure of silicon-riched nitride(SRN)/silicon-riched oxide(SRO) is proposed and prepared using RF reactive magnetron co-sputtering. High temperature annealing of SRN/SRO multilayers leads to formation of Si nanocrystals(NC) from isolating SRN and SRO layers simultaneously, which efficiently improves carrier transport ability compared to conventional SRN/Si_3N_4 counterpart. Micro-Raman scattering analysis reveals that SRN layer has dominating number of denser and smaller Si NCs, while SRO layer has relatively less, sparser and bigger Si NCs, as confirmed by high resolution transmission electron microscopy observation. The substitute SRO layers for Si_3N_4 counterparts significantly increase the amount of Si NCs as well as crystallization ratio in SRN layers; while the average Si NC size can be well controlled by the thickness of SRN layers and the content of N, and hence an obvious stronger absorption in UV region for the novel structure can be observed in absorption spectra. The I-V characteristics show that the current of hybrid SRN/SRO system increases up to 2 orders of magnitude at 1 V and even 5 orders of magnitude at 4 V compared to that of SRN/Si_3N_4 structure. Si NCs in Si Oylayers provide a transport pathway for adjacent Si NCs in Si Nxlayers. The obvious advantage in carrier transportation suggests that SRN/SRO hybrid system could be a promising structure and platform to build Si nanostructured solar cells.

关键词： Silicon nanostructure Magnetron sputtering Raman Spectroscopy Charge transport

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Expression of angiostatin cDNA in human gallbladder carcinoma cell line GBC-SD and its effect on endothelial proliferation and growth

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World Journal of Gastroenterology 2006年第17期12卷 2762-2766页

作者： Ding-Zhong Yang Jing He Ji-Cheng Zhang zuo-Ren wang Department of Surgery The First Hospital Xi'an Jiaotong University Xi'an 710065 Shannxi Province China Deparment of Pharmacology University of Texas Medical Branch Galveston 77555 Texas State United States Department of surgery Union Hospital Fujian Medical University Fuzhou 350001 Fujian Province China Department of surgery The First Hospital Xi' an Jiaotong University Xi'an 710065 Shannxi Province China

AIM： To explore the influence of angiostatin up-regulation on the biologic behavior of gallbladder carcinoma cells in vitro and in vitro, and the potential value of angiostatin gene therapy for gallbladder carcinoma. METHODS： A eukaryotic expression vector of pcDNA3.1（＋） containing murine angiostatin was constructed and identified by restriction endonuclease digestion and sequencing. The recombinant vector pcDNA3.1-angiostatin was transfected into human gallbladder carcinoma cell line GBC-SD with Upofectamine 2000, and paralleled with the vector and mock control. The resistant clone was screened by G418 filtration. Angiostatin transcription and protein expression were examined by RT-PCR, immunofluorescence and western-blot. The supernatant was collected to treat endothelial cells. Cell proliferation and growth in vitro were observed under microscope. RESULTS： Murine angiostatin cDNA was successfully cloned into the eukaryotic expression vector pcDNA3.1 （＋）. AFter 14 d of transfection and selection with G418, macroscopic resistant cell cloning was formed in the experimental group transfected with pcDNA 3.1（＋）-angiostatin and vector control. But untreated cells died in the mock control. Angiostatin was detected by RT-PCR and protein expression was detected in the experimental group by immunofluorescence and western-blot. Cell proliferation and growth in v/tro in the three groups were observed respectively under microscope. No significant difference was observed in the growth speed of GBC- SD cells between groups that were transfected with and without angiostatin. After treatment with supernatant, significant differences were observed in endothelial cell （ECV-304） growth in vitro. The cell proliferation and growth were inhibited. CONCLUSION： Angiostatin does not directly inhibit human gallbladder carcinoma cell proliferation and growth in vitro, but the secretion of angiostatin inhabits endothelial cell proliferation and growth.

关键词： Angiostatin Gallbladder carcinoma Endothelial cell

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Non-parallel double-crack propagation in rock-like materials under uniaxial compression

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International Journal of Coal Science & Technology 2019年第3期6卷 372-387页

作者： weidong Pan Xin wang Qiming Liu Yongkang Yuan Baodong zuo State Key Laboratory of Coal Resources and Safe Mining China University of Mining and Technology Beijing 100083 China MIRARCO-Mining Innovation Laurentian University Sudbury P3E 2C6 Canada Key Laboratory for Precise Mining of Intergrown Energy and Resources China University of Mining and Technology Beijing 100083 China Coal Industry Engineering Research Center of Top-Coal Caving Mining Beijing 100083 China

Coalescence among fractures would have influence on the stability of rock masses. Deep understanding of mechanical behavior of fractured rock masses is an important mean to identify failure mechanism of geological disaster. In this study, crack propagation processing was studied through loading pre-fractured specimens of concrete block, termed as rock-like material, in uniaxial compression tests. New non-parallel double-crack geometry was introduced to observe crack coalescence. The flaw combinations are different from the normally used flaw configurations. In addition, ultrasonic detection tests were performed on the test blocks. The stress and strain data of these tests and characteristic parameters of sound wave were recorded. The stress-strain curves of each test block under the uniaxial compression test were drawn, relations among deformation characteristics and crack angle of the crack specimens, and their overall strength were analyzed. It is found that strength of the specimen decreases as crack inclination increases under two crack inclinations. The highest uniaxial compressive strength is found in the specimen with the cracks at the same angle in different directions. Based on description of the crack initiation location, crack surface and the ultimate failure patterns, failure modes of eight subtype for test blocks are divided into three categories. It is expected that the study results could be beneficial for engineering application of jointed rock masses.

关键词： Rock-like material Non-parallel double cracks Crack-propagation path Uniaxial compression test

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