氧化钨空心球制备及其光催化性能

在较低温度下制备出氧化钨空心球，一方面可以提高催化剂对光源的利用率，另一方面能够降低催化剂成本。以氯化钨为钨源，将其在70 ℃下醇解和水解，于磺化聚苯乙烯微球表面形成氧化钨前驱体纳米颗粒，通过煅烧制备了氧化钨空心球。利用场发射扫描电镜（FE-SEM）、X射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）和综合热分析（TG-DTG）对所制备的产物进行表征。通过光催化降解罗丹明B溶液来测试氧化钨空心球的催化性能，结果表明光照60 min后催化剂对罗丹明B溶液的光催化降解率可达86.61%。

Preparation and photocatalytic activity of tungsten oxide hollow sphere

For the purpose of improving the utilization of light and cutting down the cost of preparation of the catalysts at the same time，tungsten trioxide hollow spheres were synthesized at low temperature and with tungsten chloride as tungsten source.Precursor nanoparticles were grown on the surfaces of sulfonated polystyrene spheres（SPS） through alcoholysis andhydrolysis at 70 ℃.After annealing，tungsten oxide hollow sphere can be obtained.Field-emission scanning electron micro-scope（FE-SEM），X-ray diffraction（XRD），fourier transform infrared spectroscopy（FT-IR），and thermo gravimetric analysis （TG-DTG） were used to characterize the prepared products.The photocatalytic activity of the obtained photocatalyst was tested by the degradation of Rhodamine B（RhB） with the existence of H2O2.And the degradation efficiency reached 86.61% after 60 min of illumination.