Abstract
优化了La掺杂Bi2WO6光催化剂的水热制备工艺。考察了掺杂量、反应液初始pH值、水热时间、焙烧温度及焙烧时间等条件因素对La掺杂Bi2WO6在模拟太阳光下光催化降解4-氯酚(4-CP)性能的影响。结果表明：La掺杂量为1.5 wt%，反应液初始pH值为7，160℃水热12 h，经500℃焙烧2 h，制备的La掺杂Bi2WO6的光催化性能最佳，在模拟太阳光照射下对4-CP光催化去除率达51%，明显高于Bi2WO6的光催化活性(38.4%)。 The hydrothermal synthesis process of La-doped Bi2WO6 photocatalyst was optimized. The effects of various factors including La-doping amount, initial pH of reactant solution, hydrothermal time, calcination temperature, and calcination time on the photocatalytic activity of La-doped Bi2WO6 were investigated through the photocatalytic degradation of 4-chlorophenol (4-CP) under simulated sunlight irradiation. The results show optimal preparation conditions as follows: La-doping amount is 1.5 wt%, and the initial pH value of reactant solution is 7, and hydrothermal time at 160˚C is 12 h, and calcination temperature is 500˚C, and calcination time is 2 h. The photoactivity of as-prepared La-doped Bi2WO6 was 51%, which is much higher than that of undoped Bi2WO6 prepared under the same conditions (38.4%).
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