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以氢氧化锶和金属钨为原料,采用阳极氧化技术合成了钨酸锶微晶粉体,通过X-射线衍射(XRD)、场发射扫描电镜(FESEM)、紫外-可见光谱(UV-VIS)等分析测试手段,研究了反应电流对合成反应的影响,以甲基橙为目标降解物,评价了其光催化能力。结果表明:反应电流的改变,导致合成产物结晶状况、形貌尺寸和光吸收能力的差异,进而影响其光催化性能;反应电流为0.5 A时可以得到结晶程度高、粒径1～2μm、最大光吸收边380 nm的纺锤形钨酸锶微晶,120 min内光催化降解甲基橙的效率可达92.2%。
The strontium tungstate microcrystalline powder was synthesized by the anodization technology using strontium hydroxide and tungsten as raw materials. The properties of the powders were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), ultraviolet-visible spectroscopy (UV- The effects of reaction current on the synthesis reaction were studied. The methyl orange as the target degradation product, its photocatalytic ability was evaluated. The results show that the change of reaction current leads to the difference of crystallization state, morphology size and light absorption ability of the synthesized product, which will affect the photocatalytic activity. When the reaction current is 0.5 A, the crystallinity, particle size of 1 ~ 2μm, The efficiency of photocatalytic degradation of methyl orange within 92 min was 92.2% after absorbing the spindle-shaped strontium tungstate microcrystal with 380 nm.