海绵状凝胶吸附-光催化协同去除甲基橙研究  

Synergistic Removal of Methyl Orange by Spongy Gel Adsorption and Photocatalysis

作　　者：谢磊[1] 谢颖俊 吴伟旗 XIE Lei;XIE Ying-jun;WU Wei-qi(Hangzhou Vocational&Technical College,Zhejiang Hangzhou 310018,China)

机构地区：[1]杭州职业技术学院,浙江杭州310018

出　　处：《广州化工》2022年第12期35-38,共4页GuangZhou Chemical Industry

基　　金：2021年浙江省教育厅一般科研项目(No:Y202148117);杭州职业技术学院2022年度校级科研项目(No:ky202223);2021年浙江省大学生科技创新活动计划暨新苗人才计划(No:2021R456008)。

摘　　要：凝胶态光催化材料即可利用吸附快速去除水中污染物,又能避免粉末材料或纯吸附剂回收和再利用困难问题。通过明胶(GEL)、壳聚糖(CTS)与戊二醛间交联负载Bi/BiOI/TiO_(2),得到有自洁性的凝胶材料BBT/GEL-CTS。利用XRD、SEM等获得组成和结构,并研究吸附-光催化协同去除水中甲基橙(MO)性能。结果表明,明胶:壳聚糖:催化剂=2:1:1,戊二醛质量分数2.5%,且投加量8 g/L时,呈现最优性价比。在300 W氙灯照射下,120 min内对MO的吸附-光催化协同去除率达93.58%;3次循环活性仍在85%以上。Gel-state photocatalytic materials can quickly remove pollutants from water by adsorption and avoid the difficult problems of recovery and reuse of powder materials or pure adsorbents.Self-cleaning GEL material BBT/gel-CTS was prepared by cross-linking Bi/BiOI/TiO_(2)between gelatin(GEL),chitosan(CTS)and glutaraldehyde.The composition and structure of methyl orange(MO)in water were obtained by XRD and SEM,and the adsorption-photocatalytic synergistic removal of MO was studied.The results showed that gelatin-chitosan catalyst=2:1:1,glutaraldehyde mass fraction was 2.5%,and dosage was 8 g/L,the optimal cost performance was obtained.Under the irradiation of 300 W xenon lamp,the synergistic removal rate of MO by adsorption and photocatalysis reached 93.58%within 120 min.The activity of three cycles was still above 85%.

关 键 词：吸附 光催化 凝胶 甲基橙 

分 类 号：O643.3[理学—物理化学]