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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。
Ni (2 +) - Fe ~ (3 +) - CO_3 ~ (2 -) - LDHs) and nickel (Ⅱ) catalysts were prepared by the complexing agent to aid homogeneous precipitation and conventional homogeneous precipitation, respectively. Aluminum Hydrotalcite Materials (Ni ~ (2 +) - Al ~ (3 +) - CO_3 ~ (2 -) - LDHs) Photocatalytic Materials. The structure and photocatalytic activity of photocatalyst were studied. The results show that Ni ~ (2 +) - Fe ~ (3 +) - CO_3 ~ (2 -) - LDHs and Ni ~ (2 +) - Al ~ (3 +) - CO_3 ~ (2 - The hexagonal new appearance of the layered structure, layer spacing were 0.768nm and 0.770nm. Kinetic studies of photocatalytic degradation of methyl blue show that both are first-order reactions. The results of photocatalytic activity show that the photocatalytic activity of Ni ~ (2 +) - Fe ~ (3 +) - CO_3 ~ (2 -) - LDHs is better than that of Ni ~ (2 +) - Al ~ (3 +) - CO 3 ~ 2 -) - LDHs photocatalyst. Compared with aluminum-based LDHs, iron-based LDHs (Ni ~ (2 +) - Fe ~ (3 +) - LDHs) is an ideal photocatalyst for wastewater degradation due to its low band gap (2.36eV).