摘要
采用络合剂协助均相沉淀法和传统均相沉淀法分别制备了镍铁类水滑石材料(Ni^(2+)-Fe^(3+)-CO_3^(2-)-LDHs)和镍铝类水滑石材料(Ni^(2+)-Al^(3+)-CO_3^(2-)-LDHs)光催化材料。对光催化剂材料的结构和光催化活性进行了研究。研究结果表明,Ni^(2+)-Fe^(3+)-CO_3^(2-)-LDHs和Ni^(2+)-Al^(3+)-CO_3^(2-)-LDHs均为六边形新貌的层状结构,层间距分别为0.768nm和0.770nm。光催化降解甲基蓝的动力学研究表明二者均为一级反应。光催化性能研究表明,Ni^(2+)-Fe^(3+)-CO_3^(2-)-LDHs光催化活性优于Ni^(2+)-Al^(3+)-CO_3^(2-)-LDHs光催化剂。相比铝基LDHs,铁基LDHs(Ni^(2+)-Fe^(3+)-LDHs)具有较低禁带宽度(2.36eV),是理想的废水染料降解光催化剂。
New type photocatalytic materials of Ni^2＋-Fe^3＋-CO3^2--LDHs and Ni^2＋-Al^3＋-CO3^2--LDHs were prepared by complexing agent assisted homogeneous precipitation technique and the traditional homogeneous precipitation technique. The structure and catalytic properties of material were systematically studied. The results showed that Ni^2＋-Fe^3＋-CO3^2--LDHs and Ni^2＋-Al^3＋-CO3^2--LDHs all exhibited platelet-like,and the basal spacing of Ni^2＋-Fe^3＋-CO3^2--LDHs and Ni^2＋-Al^3＋-CO3^2--LDHs were0. 768 nm and 0. 770 nm respectively. The results of photocatalytic activities and the kinetics in the process of decomposition for Methyl Blue showed that Ni^2＋-Fe^3＋-CO3^2--LDHs and Ni^2＋-Al^3＋-CO3^2--LDHs were all first order reaction. It was worth noting that Ni^2＋-Fe^3＋-LDHs had higher photocatalytic activity and the lower band gap（ 2. 36 eV） than Ni^2＋-Al^3＋-CO3^2--LDHs（ 4. 75 eV）,which was the excellent catalyst for the degradation of dye wastewater.
出处
《化工新型材料》
CAS
CSCD
北大核心
2017年第7期190-193,共4页
New Chemical Materials
基金
国家自然科学基金项目(51601167)
陕西省科技厅项目(2015SF262)
陕西省教育厅协同创新
服务地方计划项目(15JF035)
榆林学院专项科研计划项目(14YK22)
