一种活性炭负载二氧化钛光催化剂的制备方法

Process for producing absorbent charcoal loading titanium dioxide photocatalyst

Abstract

本发明属于二氧化钛光催化剂的制备技术领域,具体涉及一种用于制备活性炭负载二氧化钛光催化剂的方法。具体步骤为:对活性炭进行预处理,洗涤,烘干;在冰水浴条件下,将偏钛酸与氨水按1∶2的摩尔比加入到30%的20-40ml双氧水中,搅拌50-70分钟,得到黄绿色溶胶;将处理后的活性炭加入到黄绿色溶胶中,搅拌3-5小时后,静置12-24小时后将活性炭滤出,在惰性气体保护下煅烧,即得到所需产品;处理后的活性炭与偏钛酸的质量比为1∶1-3∶1。本发明工艺简单,原料廉价,制备条件温和,操作简便,得到负载型光催化剂为颗粒状,降解有机污染物效果好,易于分离、再生和延长使用寿命。本发明不使用有机溶剂,在制备过程中不产生对环境有污染的副产物,即整个生产过程几乎无污染,符合可持续发展的要求,是一种环保型综合工艺。
The invention relates to a preparation method of activated carbon supported titanium dioxide photocatalyst, belonging to the preparation technical field of titanium dioxide photocatalyst, comprising a plurality of steps as followings: pretreating, washing and drying the activated carbon; at the condition of ice-water bath, adding meta-titanic acid and ammonia according to a molar ratio of 1:2 into 20 to 40 milliliter hydrogen peroxide with a concentration of 30%, and agitating for 50 to 70 minutes to obtain a yellowish green sol; then adding the pretreated activated carbon into the yellowish green sol and agitating for 3 to 5 hours, filtering the activated carbon after standing for 12 to 24 hours, then calcining with the protection of inert gas to obtain the activated carbon supported titanium dioxide photocatalyst. The weight ratio of the pretreated activated carbon and the meta-titanic acid is 1:1 to 3:1. The preparation method has the advantages of simple technology, cheap raw material, mild preparation conditions, easy operation, granular shape, good organic pollutant degradation effect, easy separation, regeneration and long service life of the supported photocatalyst prepared by the preparation method, nonuse of organic solvent, non-pollution in the whole production process, accordance with the requirement of sustainable development and environment-friendly integrated technology.

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