中文摘要：

采用浸浈法以TiO2为载体制备了固载型杂多酸光催化剂——H3PW12O40/TiO2，H2SiW12O42／TiO2，H7PMo12O42/TiO2。通过Hammett指示剂与紫外光谱相结合的方法测定固体杂多酸催化剂的酸度，分别考察杂多酸种类、浸浈时间、漫溃浓度、烧结方式、烧结温度对催化剂酸度的影响，并对所制备的催化剂进行了红外光谱和光催化活性测试。结果表明，杂多酸固载到TiO2的表面，得到了催化活性较TiO2更强的复合杂多酸光催化剂，其对酸性大红3R的降解率从纯TiO2的79％提高到91％。以磷钨酸水溶液浸溃TiO2，漫溃浓度为0．10mol·L^-1，浸渍时间为28h，烘干温度为120℃，微波炉焙烧功率为650W，烧结时间为40min制得的催化剂活性最高．在HPA-TiO2光催化系统中，杂多酸显著加速电子从TiO2表面到O2分子的传递，改变了TiO2光催化反应历程，从而提高光催化效率。

英文摘要：

Three kinds of heteropolyacid （HPA） supported on titanium dioxide （TiO2） photocatalysts-H3PW12O40/TiO2,H2SiW12O42/TiO2,and H7PMo12O42/TiO2 were prepared separately by immersing TiO2 powder in each corresponding aqueous solution of HPA, and then agglomerated at a certain temperature. The acid intensities of supported HPA photocatclysts were determined by Hammer indicator associated with UV spectrum. The effects of the kinds of HPA, immersing time, concentration of HPA aqueous solution, the temperature and mode of agglomeration on the acid intensity of the supported HPA photocatalysts were investigated. The supported HPA photoeatalysts were characterized by IR spectrum and their photoeatalytic activities were measured by the photodegradation experiments of acid brilliant red 3R. Results show that HPA is loaded on the surface of TiO2 and it causes the prepared catalyst has higher acid intensity. The supported HPA photocatalysts prepared have higher catalytic activities than that of unloaded TiO2, and its photodegradation efficiency for acid brilliant red 3R is increased from 79% to 91%. Among the above mentioned three kinds of HPA/TiO2 photocatalysts, the catalytic activity of H3PW12O40/TiO2 is the highest when its preparation is under following conditions： the concentration of H3PW12O40 aqueous solution is 0.10 mol·L^-1, immersing time 28 h, drying temperature 120℃, microwave agglomeration power 650W and time 40min, respectively. In the new photoeatalytic system of HPA/TiO2, HPA accelerates the electron transfer from the TiO2 surface to O2, which changes the course of TiO2 photocatalysis and improves the photocatalytic efficiency.