In recent years,vanadate has attracted the attention of researchers for its application in electrode materials due to its high specific capacity and layered crystal structure.Herein,a typical manganese vanadium oxides...In recent years,vanadate has attracted the attention of researchers for its application in electrode materials due to its high specific capacity and layered crystal structure.Herein,a typical manganese vanadium oxides (Mn V_(2)O_(6)) product is efficient synthesis via a simple one-step hydrothermal method at 200℃ for 16 h.The as-prepared Mn V_(2)O_(6) sample is found to be the unique one-dimensional fan-like superstructure consist of several nanorods.From a microcosmic point of view,VO6 octahedra sheets are connected by sharing edges which provides highly-open framework for rapid the intercalation and deintercalation of guest ions Therefore,stable Mn V_(2)O_(6) was prepared and used as a cathode material in aqueous zinc ion batteries,which displayed favorable specific discharge capacity,excellent coulombic efficiency and well cycling performance.展开更多
为研究城市小型河流中污染物的物理迁移过程规律,分析基流条件下流动水体与暂态存储区之间的滞留交互作用,采用溴化锂（Li Br）作为保守性示踪剂进行野外现场示踪试验,结合一维溶质运移存储模型（One-dimensional Transport with Inflow...为研究城市小型河流中污染物的物理迁移过程规律,分析基流条件下流动水体与暂态存储区之间的滞留交互作用,采用溴化锂（Li Br）作为保守性示踪剂进行野外现场示踪试验,结合一维溶质运移存储模型（One-dimensional Transport with Inflow and Storage model,OTIS）定量解析潜流交换特性,估算纵向弥散系数（D）、潜流交换面积（As）、主河道断面面积（A）和潜流交换系数（α）。模型度量指标Da I值和均方根误差值结果表征参数模拟结果可靠性高,拟合效果理想。由泵入点O至下游1 300 m设置的A、B、C、D 4处监测点的模拟结果表明,水文参数D、As、A和α均随水文条件而变,OB河段（0-600 m）潜流交换能力较弱,主要以对流弥散过程为主;BD河段（600-1 300 m）具有较强的暂态存储能力,对溶质的滞留时间长;BC（600-1 000 m）和CD（1 000-1 300 m）河段交换系数分别为（3.42×10^-6±0.65×10^-6）s-1和（2.87×10^-6±0.81×10^-6）s-1;河段BC存在2.2×10-5m3/（s·m）的侧向补给流量。4个河段对比发现,城市河流渠道化、河床沉积物贫瘠等特征导致潜流交换能力弱化。展开更多
基金supported by the National Natural Science Foundation of China (No. U1904215)the Natural Science Foundation of Jiangsu Province (No. BK20200044)the Changjiang Scholars Program of the Ministry of Education (No. Q2018270)。
文摘In recent years,vanadate has attracted the attention of researchers for its application in electrode materials due to its high specific capacity and layered crystal structure.Herein,a typical manganese vanadium oxides (Mn V_(2)O_(6)) product is efficient synthesis via a simple one-step hydrothermal method at 200℃ for 16 h.The as-prepared Mn V_(2)O_(6) sample is found to be the unique one-dimensional fan-like superstructure consist of several nanorods.From a microcosmic point of view,VO6 octahedra sheets are connected by sharing edges which provides highly-open framework for rapid the intercalation and deintercalation of guest ions Therefore,stable Mn V_(2)O_(6) was prepared and used as a cathode material in aqueous zinc ion batteries,which displayed favorable specific discharge capacity,excellent coulombic efficiency and well cycling performance.
