钨酸锶微米球的溶剂热合成及其光催化降解除草剂的实验研究

通过溶剂热法成功合成了钨酸锶微米球,利用X-射线衍射(XRD)、场发射扫描电镜(FESEM)、傅立叶转换红外线光谱分析(FTIR)等测试手段,对合成产物的结构和形貌进行了表征。以钨酸锶为光催化剂,研究了除草剂特丁噻草隆的降解性能,考察了光源、催化剂、Fe3+、天然沸石负载等因素对除草剂降解率的影响。结果表明,添加Fe3+、负载天然沸石均明显提高除草剂的降解效果。当Fe3+浓度为1.5×10-3mmol/L时,降解率达96.2%;天然沸石负载量40%时,降解率为93.3%。

SYNTHESIS AND PHOTOCATLYTIC PROPERTIES OF STRONTIUM TUNGSTATE MICROSPHERES FOR HERBICIDES

Strontium tungstate microspheres were successfully synthesized by solvent-thermal method.The as-synthesized products were characterized via X-ray Diffraction（XRD）,Field Emitted Scanning Electron Microscopy（FESEM） and Fourier Transform Infrared Spectrometer（FTIR）.The photocatalytic activities of the as-synthesized strontium tungstate for Tebuthiuron had been researched.Moreover,the effect of different conditions,which included quantity of catalyst,light source, added and natural zeolite loaded on SrWO4,on decolorization rate of Tebuthiuron was investigated.The results showed that adding Fe^3＋ in herbicide solution and SrWO4-loaded natural zeolite both could increase the decolorization rate of the herbicide obviously.When Fe^3＋ concentration was 1.5×10^-3 mmol/L,the decolorization rates of the herbicide reached 96.2%.When the amount of natural zeolite loaded on SrWO4 was 40%,the decolorization rates of the herbicide was 93.3%.