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以Ba(NO3)2和In(OH)3为起始物,采用水热法成功制备了羟基石榴石Ba3In2(OH)12。探讨了钡铟摩尔比(Ba/In)、氢氧化钠浓度cNaOH、水热反应温度(T)和时间(t)对Ba3In2(OH)12形成的影响,确定了适宜合成条件:n(Ba)/n(In)=2:1、cNaOH=7.0mol/L、T=200℃和t=14 h。以罗丹明B(Rh B)为降解模型,考察了Ba3In2(OH)12的光催化性能。结果表明:对于50 m L浓度为5.0 mg/L的Rh B溶液,当催化剂加入量为0.1 g时,在高压汞灯下照射180 min,Rh B的降解率可达95.6%;而在氙灯辐照同样时间,其降解率只有18.3%,说明Ba3In2(OH)12具有优异的紫外光催化活性。
Hydroxide garnet Ba3In2 (OH) 12 was successfully prepared by hydrothermal method using Ba (NO3) 2 and In (OH) 3 as starting materials. The effects of Ba / In, sodium hydroxide concentration cNaOH, hydrothermal reaction temperature (T) and time (t) on the formation of Ba3In2 (OH) 12 were discussed. /n(In)=2:1, cNaOH=7.0 mol/L, T = 200 ° C, and t = 14 h. The photocatalytic activity of Ba3In2 (OH) 12 was investigated by rhodamine B (Rh B) degradation model. The results showed that the RhB solution with a concentration of 5.0 mg / L at a concentration of 5.0 mL / L had a degradation rate of 95.6% when exposed to a high pressure mercury lamp for 180 min at a dosage of 0.1 g. At the same time, the degradation rate was only 18.3%, indicating that Ba3In2 (OH) 12 has excellent UV photocatalytic activity.