Co/ZnO复合晶体材料光催化性能研究
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摘要
研究采用水热法,以Zn(AC)_2·2H_2O作为原料,以Co(Cl)_2·6H_2O作为添加剂,NaOH作为矿化剂,合成了Co/ZnO复合晶体材料。利用X射线衍射(XRD)、扫描电子显微镜(SEM)、UV-Vis漫反射光谱对复合晶体材料进行表征分析,结果显示随着Co添加量的变化,其晶体材料的形貌和光吸收能力也在发生明显的变化。当添加量为15%时,复合材料显示出二维片状形貌,其表面积明显增大,对光的吸收能力增强。在相同条件下对不同样品进行光催化降解实验,结果显示添加量为15%时的样品优于其他样品的催化性能。光催化动力学理论模拟结果分析证实了其光催化降解过程符合一级动力学反应。
Co/ZnO composite crystalline materials were synthesized by hydrothermal method using Zn(AC)_2·2H_2O as raw material,Co(Cl)_2·6H_2O as additive and NaOH as mineralizer. X-ray diffraction(XRD),scanning electron microscopy(SEM) and UV-Vis diffuse reflectance spectroscopy were used to characterize the composite crystals. The results showed that the morphology and optical absorption capacity of the composite crystals changed significantly with the amount of Co added. When the content of the composite was 15%,the composite exhibited two-dimensional flake morphology,the surface area of the composite increased significantly,and the absorption of light was enhanced. Under the same conditions,photocatalytic degradation experiments were carried out on different samples. The results showed that the samples with 15% addition had better catalytic performance than other samples. The theoretical simulation results of photocatalytic kinetics confirm that the photocatalytic degradation process conforms to the first-order kinetic reaction.
Co/ZnO composite crystalline materials were synthesized by hydrothermal method using Zn(AC)_2·2H_2O as raw material,Co(Cl)_2·6H_2O as additive and NaOH as mineralizer. X-ray diffraction(XRD),scanning electron microscopy(SEM) and UV-Vis diffuse reflectance spectroscopy were used to characterize the composite crystals. The results showed that the morphology and optical absorption capacity of the composite crystals changed significantly with the amount of Co added. When the content of the composite was 15%,the composite exhibited two-dimensional flake morphology,the surface area of the composite increased significantly,and the absorption of light was enhanced. Under the same conditions,photocatalytic degradation experiments were carried out on different samples. The results showed that the samples with 15% addition had better catalytic performance than other samples. The theoretical simulation results of photocatalytic kinetics confirm that the photocatalytic degradation process conforms to the first-order kinetic reaction.
引文
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[21]李丹,黄剑锋,曹丽云,等.微波水热法制备Cr3+掺杂ZnO纳米晶及其光催化性能[J].硅酸盐学报,2013,41(12),1692-1696.
[2]郭春芳,张淑芬.溶胶-凝胶法制备ZnO纳米微球及光催化性能研究[J].硅酸盐通报,2013,32(8):1502-1505.
[3]蔡红,杜庆波,徐基贵,等.ZnO纳米棒的制备及其光催化活性研究[J].硅酸盐通报,2013,32(10):1899-1992.
[4]张晓茹,林艳红,张健夫,等.N掺杂TiO2纳米粒子表面光生电荷特性与光催化活性[J].物理化学学报,2010,26(10):2733-2738.
[5]刘月,余林,魏志钢,等.稀土金属掺杂对锐钛矿型TiO2光催化活性影响的理论和实验研究[J].高等学校化学学报,2013,34(2):434-440.
[6]高鑫,刘祥萱,王煊军,等.改性Cu2O光催化剂的研究进展[J].2016,44(1):120-128.
[7]潘超.新颖Co3O4分级结构的制备及其光催化性能研究[J].化学学报,2011,69(8):870-874.
[8]刘淑玲,许青青.Fe3O4磁性材料的制备及其光催化降解性能[J].陕西科技大学学报(自然科学版),2015,33(2):103-107.
[9]夏志美,刘竹林.氧化锌掺杂改性研究进展[J].材料导报,2014,28(11):47-52.
[10]胡玲,曹渊,徐彦芹.ZnO纳米球的制备及性能研究进展[J].化学通报,2014,77(10):928-935.
[11]胡海峰,贺涛.酸碱度调控氧化锌纳米材料形貌及其光催化还原CO2研究[J].物理化学学报,2016,32(2):543-550.
[12]殷巧巧,乔儒,童国秀.离子掺杂氧化锌光催化纳米功能材料的制备及其应用[J].化学进展,2014,26(10):1619-1632.
[13]位子涵,孙永娇,赵振廷,等.Mn掺杂花状ZnO的合成及其光催化特性研究[J].功能材料,2015,46(9):9081-9085+9091.
[14]曹萍,白越.N掺杂纳米ZnO/聚氯乙烯复合材料的制备和光催化性能[J].材料研究学报,2015,29(3):213-215.
[15]刘欣,李家科,李艳艳,等.ZnO/g-C3N4复合光催化剂制备及其光催化性能研究[J].人工晶体学报,2016,45(11):2688-2692.
[16]余长林,杨凯,吴琼,等.Zr-Al共掺对ZnO光催化剂结构和催化性能的影响[J].硅酸盐学报,2012,40(3):396-401.
[17]王雪静,朱芳坤,胡林峰.掺N纳米ZnO的制备及光催化活性[J].硅酸盐学报,2012,40(9):1300-1304.
[18]于翔鹏,傅佳佳,王鸿博.碱沉淀法制备Ce掺杂ZnO及其光催化性能[J].材料科学与工程学报,2015,33(4):591-594+624.
[19]韦志仁,王颖,高琳洁,等.金属离子掺杂ZnO晶体的制备及其光催化性能的研究[J].人工晶体学报,2011,40(6):1511-1525.
[20]王元有,周国强,张龙,等.铜掺氧化锌多孔纳米棒的水热合成及其光催化性能[J].物理化学学报,2016,32(11),2785-2793.
[21]李丹,黄剑锋,曹丽云,等.微波水热法制备Cr3+掺杂ZnO纳米晶及其光催化性能[J].硅酸盐学报,2013,41(12),1692-1696.