利用废旧锌锰电池制备光催化剂净化甲苯  

Preparation of photocatalyst for toluene purification from waste zinc manganese battery

作　　者：赵忠[1] 杜欢 徐乐 高培 沈伯雄[1] ZHAO Zhong;DU Huan;XU Le;GAO Pei;SHEN Boxiong(School of Energy and Environment Engineering,Hebei University of Technology,Tianjin 300401,China;Sichuan Water Conservancy College,Chengdu 610000,China)

机构地区：[1]河北工业大学能源与环境工程学院,天津300401 [2]四川水利职业技术学院,成都610000

出　　处：《环境工程学报》2021年第12期3982-3991,共10页Chinese Journal of Environmental Engineering

摘　　要：针对废旧锌锰电池回收利用难,以及光催化剂TiO_(2)活性低的问题,以废旧锌锰电池和商业二氧化钛为原料,通过球磨法制备了新型复合光催化剂。在紫外光灯照射下,进行了废旧锌锰电池复合改性TiO_(2)对甲苯的光催化氧化实验,并重点探究空速、光照强度、相对湿度和氧气体积分数等关键实验条件对甲苯净化效率的影响。结果表明,改性后的催化剂对甲苯的净化能力大幅提高;当TiO_(2)与废电池芯粉的质量比为2∶1时,催化剂的催化效果最好,甲苯的净化效率提高了近45%;空速越大,催化剂对甲苯的净化效率越低;净化效率随光照强度的增加呈现先增加后保持不变的规律;催化剂在相对湿度为30%的条件下具有最佳的催化活性,氧气体积分数为15%时为净化效率达到最大。本研究结果可为废旧锌锰电池的回收利用提供新的思路。In view of the difficult recycling of waste zinc manganese batteries and the low activity of photocatalyst TiO_(2),a new composite photocatalyst was prepared by ball milling with waste zinc manganese batteries and commercial titanium dioxide as raw materials.Under the irradiation of ultraviolet lamp,the photocatalytic oxidation of toluene by composite modified TiO_(2)of waste zinc manganese battery was studied,and the effects of key experimental conditions such as space velocity,light intensity,relative humidity and oxygen volume fraction on the purification efficiency of toluene were mainly explored.The results showed that the purification ability of the modified catalyst for toluene was greatly improved.When the mass ratio of TiO_(2)to waste battery core powder was 2∶1,the catalytic effect of the catalyst was the best,and the purification efficiency of toluene was increased by nearly 45%.It was found that the higher the space velocity,the lower the purification efficiency of the catalyst for toluene.The purification efficiency increased first and then remained unchanged with the increase of light intensity.The catalyst had the best catalytic activity when the relative humidity was 30%,and the purification efficiency reaches the maximum when the oxygen volume fraction was15%.This study provided a new idea for the recycling of waste zinc manganese batteries.

关 键 词：固废资源化 废旧锌锰电池 TiO_(2)光催化 甲苯 

分 类 号：X511[环境科学与工程—环境工程] X705