【摘要】 TiO2具有良好的化学稳定性、低成本、耐腐蚀、无毒以及独特的光学、电学性质,纳米TiO2是目前最具应用前景的光催化剂。研究采用溶胶—凝胶法制备了B掺杂的TiO2光催化剂,用X-射线衍射(XRD)和紫外—可见光谱(UV-Vis)对其进行了表征,并通过降解甲基橙溶液来检测其光催化性能,研究了不同掺杂量、煅烧温度、煅烧时间等制备条件对B-TiO2光催化剂光催化性能的影响。结果表明,掺杂B后,晶型未发生变化,电荷分离效率提高,紫外下TiO2的吸收边发生红移,制备出的B-TiO2比未掺杂的TiO2具有较好的可见光响应。合成B-TiO2催化剂的最佳条件为B掺杂量为1.4%,煅烧温度400℃,煅烧时间2h。更多还原

【Abstract】 TiO2 is good chemical stable,inexpensive,corrosion preventive,non-toxic,and has good optics and eletrical characters. Nanometer TiO2 is most promising photocatalyst now. In this paper,the B-doped photocatalyst were prepared by sol-gel method,and characterized by x-ray diffraction ( XRD) and ultraviolet-visible spectroscopy ( UV-Vis) . The catalyst capability was detected by degradation of methyl orange solution. Effects of prepared conditions of B-doped photocatalyst including doping contents,calcined temperatures,calcined time were investigated in detail. The results indicated that,after doped,crystal form of catalyst was not changed,charge separation efficiency of catalyst was enhanced,and absorption edge in UV was redshifted after doped, and doped photocatalyst had better visible light respond than non-doped. The optimized prearation conditions are listed that,B-doped content was 1. 4% ,calcined temperature was 400℃ ,calcined time was 2 hours.更多还原