rGO/ZnSn(OH)_6复合材料的合成及其光催化性能研究

The Synthesis and Photocatalytic Properties of rGO-ZnSn(OH)_6 Composite

以(CH_3COO)_2Zn·2H_2O、NaOH和SnCl_4为主要原料,采用水热法合成粒径分布均匀、平均粒径为100~200 nm、分散性良好的ZnSn(OH)_6微纳米立方体,并对羟基锡酸锌进行酸化处理;同时,通过改进的Hummers法制备氧化石墨烯(GO),在低温条件下制备了GO-ZnSn(OH)_6复合材料,在紫外光照射条件下光致还原GO得到还原氧化石墨烯(rGO),最终得到rGO-ZnSn(OH)_6复合材料.利用XRD、SEM、FT-IR、UV-Vis、PL分析了材料的物相、微观结构以及光吸收性能,并以亚甲基蓝为降解物质评价不同GO掺杂量对rGO-ZnSn(OH)_6复合材料光催化性能的影响.结果表明,当GO的质量分数为2.0%时,rGO-ZnSn(OH)_6复合材料的降解率达到最大值93.2%,降解速率常数k=0.026 min^(-1),分别是单一的ZnSn(OH)_6的2倍和4.3倍.

ZnSn （OH） 6 microl nanocubes with good dispersancy, uniform particle size distribution, and the av- erage particle size for micro/nanoseale （ 100 - 200nm） were prepared by the hydrothermal method using （CH3COO） 2Zn ·2H20, NaOH and SnCI4 as reactants, and the acidificate the Zinc bydroxysta treatment, graphene oxide（GO） was prepared by a modified Hummers method. GO-ZnSn（OH）6 composite was prepared under the condition of low temperature, reduction graphene oxide （rGO） was obtained by photo induced re- duction of GO under UV irradiation, and finally get rGO-ZnSn（OH） 6 composite. The samples were character- ized by the XRD, SEM, FT-IR, UV-Vis and PL to analyze the phase, microstructure and optical absorption properties, and the effect of different amounts of GO dopant on the photocatalytic property of rGO-ZnSn （OH） 6 composite was also evaluated using methylence blue as the degradation of material. The results showed that the mass fraction of GO was 2.0 （ massfraction, % ）, the maximum degradation rate of the rGO-ZnSn （OH） 6 com- posite was 93.2% , the degradation rate constant k = 0. 026min^-1 , which was 2 times and 4.3 times of the pure ZnSn （OH） 6, respectively.