纳米介孔ZnO@SiO_2核壳结构催化剂的制备及其耐酸性能  

Preparation of Nano-mesoporous ZnO@SiO_2 Core-Shell Structure Catalysts and Its Acid Tolerance

作　　者：陈子玉 刘琳 李翰林 潘勤鹤 杨玮婷 任国建 韩秀萍 牛成 CHEN Zi-yu;LIU Lin;Li HAN-lin;PAN Qin-he;YANG Wei-ting;REN Guo-jian;HAN Xiu-ping;NIU Cheng(Key Laboratory of Advanced Materials of Tropical Island Resources,Ministry of Education,School of Materials and Chemical Engineering,Hainan University,Haikou 570228,Chin)

机构地区：[1]海南大学材料与化工学院热带岛屿资源先进材料教育部重点实验室,海口570228

出　　处：《人工晶体学报》2018年第7期1377-1381,共5页Journal of Synthetic Crystals

基　　金：国家自然科学基金(21761010);海南省自然科学基金(217018);海南大学启动基金(kyqd1654;KYQD(ZR)1806);海南省高等学校科学研究项目(Hnky2015-2);海南省教育厅科学研究项目(Hnky-92)

摘　　要：以纳米中空介孔Si O2为壳,制备具有核壳结构的纳米介孔Zn O@Si O2催化剂,采用透射电子显微镜(TEM)、X射线衍射(XRD)和比表面积(BET)等进行表征,在酸性介质中测定其光催化活性。实验结果表明:纳米介孔Zn O@Si O2催化剂直径约为50 nm,颗粒均一,分散性较好;在p H大于3的酸性介质中能稳定存在并且保持催化活性;在亚甲基蓝(MB)浓度初始浓度为10 mg/L,催化剂用量5 mg,p H为5时,降解率达到98.6%,循环5次后,催化效率依然在61.5%。该催化剂具有较强的耐酸性能,在酸性染料废水处理中具有巨大的应用前景。Nano-mesoporous ZnO @ SiO2 catalysts with core-shell structure were synthesized by using impregnation method and basing on hellow nanoporous mesoporous SiO2. The structure was characterized by transmission electron microscopy（ TEM）,X-ray diffraction（ XRD） and specific surface area（ BET）and the photocatalytic activity was measured in acidic medium. The results show that the nanomesoporous ZnO@ SiO2 catalyst has a diameter of about 50 nm,uniform particle and good dispersibility.It is stable in acidic media beyond 3 and maintain catalytic activity. The degradation rate raches 98. 6%in MB aqueous solution（ 10 mg/L） containing 5 mg catalytic under UV light and after five cycles the degradation rate is 61. 5%. The catalytic has excellent acid resistance and has huge application prospect in the treatment of acid dye wastewater.

关 键 词：纳米介孔ZnO@SiO2 核壳结构 光催化 耐酸性 

分 类 号：O649[理学—物理化学]