| 苏婷,宋永辉,张珊,田宇红,兰新哲.硝酸活化时间对煤基电极材料结构及性能的影响[J].材料导报,2018,32(4):528-532 |
| 硝酸活化时间对煤基电极材料结构及性能的影响 |
| Influence of Nitric Acid Activation Time on the Structure and Property of Coal-based Electrode Materials |
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| DOI：10.11896/j.issn.1005-023X.2018.04.004 |
| 中文关键词: 电极材料 活化时间 孔径 吸附性能 |
| 英文关键词: electrode material, activation time, pore size, adsorption capacity |
| 基金项目:基金项目:国家自然科学基金(51774227)；国家自然科学基金青年项目(51504180) |
| 作者 | 单位 | E-mail | | 苏婷 | 西安建筑科技大学冶金工程学院,陕西省黄金与资源重点实验室,西安 710055
榆林学院化学与化工学院,榆林 719000 | | | 宋永辉 | 西安建筑科技大学冶金工程学院,陕西省黄金与资源重点实验室,西安 710055 | st1010ivy@126.com,syh1231@126.com | | 张珊 | 西安建筑科技大学冶金工程学院,陕西省黄金与资源重点实验室,西安 710055 | | | 田宇红 | 西安建筑科技大学冶金工程学院,陕西省黄金与资源重点实验室,西安 710055 | | | 兰新哲 | 西安建筑科技大学冶金工程学院,陕西省黄金与资源重点实验室,西安 710055 | |
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| 摘要点击次数: 2010 |
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| 中文摘要: |
| 研究了硝酸活化时间对煤基电极材料表面性质及吸附性能的影响,采用扫描电子显微镜(SEM)、傅里叶红外光谱(FTIR)对煤基电极材料表面性质及形貌进行表征。研究表明,随着硝酸活化时间的延长,煤基电极材料的活化产率和抗压强度逐渐减小,而碘吸附值则呈先增大后减小的趋势,材料表面羧基、内酯基及酚羟基含量逐渐增加。活化8 h时煤基电极材料的收率为67.64%,抗压强度为0.234 MPa,碘吸附值达到了301.72 mg·g-1,表面含氧官能团总量提高了1.44倍。电化学测试结果表明,煤基电极具有良好的电容特性并形成稳定的双电层结构,活化时间越长,扩散过程内阻越小。电吸附处理后氰化废水中各离子的去除率均随活化时间的延长而增大,活化8 h时铜及总氰离子的去除率分别可达到90%与68%。 |
| 英文摘要: |
| Nitric acid was used to activate the coal-based electrode, the effect of activation time on the surface properties and adsorption properties of the electrode materials was studied. Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) were used to characterize the microstructure and surface chemical properties of the electrodes. The study showed that the iodine adsorption value of coal-based electrode material increased at first and then decreased while the activation rate and compressive strength gradually decreased with the increasing activation time of nitric acid, the content of carboxyl group, hydroxyl group, phenolic hydroxyl group and other oxygen functional groups increased gradually. When the activation time was 8 h, the total oxygen functional groups could be increased by 144%, the iodine adsorption value reached 301.72 mg·g-1, and the compressive strength was 0.234 MPa, the yield was 67.64%. The electrochemical test results showed that the coal-based electrode had good capacitance characteristics and formed a stable double layer structure. The removal rate of each ion in the process of cyanide wastewater after electro adsorption was increased with the increasing activation time, copper and total cyanide ion removal rates could reach 90% and 68% after activating for 8 h. |
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