论文部分内容阅读
通过润湿分散剂(十二烷基苯磺酸钠ABS-Na、木质素磺酸钠SL和羧甲基纤维素钠CMC)和载体(白炭黑、高岭土)的筛选,确定了60%稀土镧掺杂纳米TiO2可湿性粉剂(WP)的最优配方。试验结果表明:十二烷基苯磺酸钠为2%,木质素磺酸钠6%,采用高岭土作载体,可湿性粉剂的悬浮率达到了98.12%,润湿时间为4.09 s,且冷贮、热贮合格。通过克百威溶液在太阳光下的消失情况来研究La-TiO2可湿性粉剂的光催化降解效果。试验表明:稀土镧掺杂后的纳米TiO2光催化活性得到了提高,且使用La-TiO2可湿性粉剂能进一步提高克百威的光催化降解效果,当降解效果达最大时,La-TiO2最佳用量为0.2 g.L-1,而直接使用La-TiO2粉末,其最佳用量为0.4 g.L-1。
Through the screening of wetting and dispersing agents (sodium dodecylbenzenesulfonate ABS-Na, sodium lignin sulfonate SL and sodium carboxymethylcellulose CMC) and carrier (silica, kaolin), 60% rare earth Optimal formula of lanthanum doped nano TiO2 wettable powder (WP). The results showed that: sodium dodecyl benzene sulfonate 2%, sodium lignosulfonate 6%, using kaolin as a carrier, wettable powder suspension rate reached 98.12%, wetting time was 4.09 s, and cold storage , Heat storage qualified. The photocatalytic degradation of La-TiO2 wettable powder was studied by the disappearance of carbofuran in sunlight. The results showed that the photocatalytic activity of lanthanum-doped nano-TiO2 was enhanced, and the La-TiO2 wettable powder could further enhance the photocatalytic degradation of carbofuran. When the degradation effect reached the maximum, La-TiO2 was the best The dosage of 0.2 gL-1, while the direct use of La-TiO2 powder, the best dosage of 0.4 gL-1.