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采用溶胶-凝胶法合成TiO_2、La~(3+)/TiO_2光催化剂,并对样品进行了XRD和SEM表征,以甲基橙模拟有机污染水,研究了La~(3+)/TiO_2降解甲基橙的催化活性.讨论了照射时间、煅烧温度、煅烧时间和催化剂的量等因素对降解甲基橙的影响,并与单一的TiO2光催化剂进行比较.结果表明:当煅烧温度为500℃,煅烧时间为60min,染料的初始浓度为10.0mg·L~(-1),催化剂的用量为1.00g·L~(-1),光照强度为1.0mW·cm~(-2)和照射时间为180min时,La~(3+)/TiO_2光催化剂降解染料表现出了较好的光催化活性.
TiO 2 and La 3+ / TiO 2 photocatalysts were synthesized by sol-gel method. The samples were characterized by XRD and SEM. The degradation of La 3+ / TiO 2 was studied by methyl orange simulated organic polluted water. Methyl orange.The effects of irradiation time, calcination temperature, calcination time and amount of catalyst on the degradation of methyl orange were discussed and compared with the single TiO2 photocatalyst.The results showed that when the calcination temperature was 500 ℃ , The calcination time was 60min, the initial concentration of dye was 10.0mg · L -1, the amount of catalyst was 1.00g · L -1, the light intensity was 1.0mW · cm -2 and the irradiation time For 180min, the photocatalytic degradation of La ~ (3 +) / TiO_2 photocatalysts showed good photocatalytic activity.