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电化学法原位合成Zn/Co-ZIF材料及电容性能 被引量:2
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作者 赵雪静 孙晓君 +2 位作者 魏金枝 张婷 刘欣然 《复合材料学报》 EI CAS CSCD 北大核心 2021年第5期1543-1550,共8页
采用电化学法原位合成双金属Zn/Co-类沸石类咪唑骨架材料(ZIF)。通过改变反应溶剂配比、电压大小、反应时间及金属钴盐添加量来探究材料的最佳合成条件。在N,N-二甲基甲酰胺(DMF)与乙醇(EtOH)的体积比为1∶4,外加电压为5 V,外加金属钴盐... 采用电化学法原位合成双金属Zn/Co-类沸石类咪唑骨架材料(ZIF)。通过改变反应溶剂配比、电压大小、反应时间及金属钴盐添加量来探究材料的最佳合成条件。在N,N-二甲基甲酰胺(DMF)与乙醇(EtOH)的体积比为1∶4,外加电压为5 V,外加金属钴盐为0.08 g时,合成不规则层状颗粒结构的Zn/Co-ZIF。以Zn/Co-ZIF为活性物质制备电极用于超级电容器性能研究,并与同条件下电化学法原位合成的ZIF-8作对比。通过循环伏安(CV)、恒电流充放电(GCD)及交流阻抗(EIS)等测试手段探究其电容性能。结果表明,不同扫描速度下Zn/Co-ZIF电极材料的CV曲线有一对氧化还原峰,表现出明显的赝电容特性。在1 A/g的电流密度下,Zn/Co-ZIF电极材料的比电容为189 F/g,高于ZIF-8电极(72 F/g),2 000次循环后,比电容值仍能保持初始值的90.5%。 展开更多
关键词 电化学合成 电极材料 双金属ZIF 超级电容器 电容性能
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Preparation, characterization of sludge adsorbent and investigations on its removal of hydrogen sulfide under room temperature 被引量:3
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作者 Fen LI Tao LEI +2 位作者 Yanping ZHANG jinzhi wei Ying YANG 《Frontiers of Environmental Science & Engineering》 SCIE EI CAS CSCD 2015年第2期190-196,共7页
To recycle the sludge resource from sewage treatment plants and solve the problem of odor pollution, the sludge was converted into an adsorbent by carbonized pyrolysis and the process was optimized by orthogonal exper... To recycle the sludge resource from sewage treatment plants and solve the problem of odor pollution, the sludge was converted into an adsorbent by carbonized pyrolysis and the process was optimized by orthogonal experiments. The capability for odor removal as well as the structure of the adsorbent was studied with HzS as a target pollutant. The results indicate that the main factor affecting the deodorization performance of the adsorbent is the activating time. The sludge adsorbent sample SAC1 prepared under optimum conditions exhibits the best deodorization performance with a H2S breakthrough time of 58 min and an iodine value nearly that of the coal activated carbon. The breakthrough time of H2S is much longer than that on the coal activated carbon. On the other hand, characterization results from X-ray diffractometer (XRD), X-ray photoelectron spectrometer (XPS) and scanning electron microscope (SEM) techniques show that SAC1 is composed of mainly graphite carbon with lower oxygen content on the surface. The bulk of SAC 1 exhibits a honeycomb structure with well developed porosity and a high specific surface area of 120.47 m^2· g^-1, with the average pore diameter being about 5 nm. Such a structure is in favor of H2S adsorption. Moreover, SAC 1 is detected to contain various metal elements such as Zn, Fe, Mg, etc., leading to a superior deodorization property to that of coal activated carbon. 展开更多
关键词 Keywords orthogonal experiment sludge adsorbent hydrogen sulfide
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