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以硝酸铋和二氧化锗为原料、甘油和乙醇为溶剂,在不加表面活性剂条件下,通过液相反应和煅烧制备Bi_2GeO_5纳米棒,对其物相、形貌进行了表征,分析了其形成机理;以其为催化剂光催化降解罗丹明B(Rh B).结果表明,所制为纯Bi_2GeO_5材料,具有均一的棒状形貌和良好稳定的光催化活性.随Bi_2GeO_5浓度增加,其催化降解Rh B效果先显著提高后降低,Bi_2GeO_5浓度为1.5 g/L、光照150 min时光降解率最高,达90.4%.水热过程中铋离子与乙二醇形成的配合物自组装成纳米棒状结构,与溶液中游离的锗酸根离子发生离子置换反应,形成Bi_2GeO_5纳米棒材料.
Bi 2 GeO 5 nanorods were prepared by liquid-phase reaction and calcination with bismuth nitrate and germanium dioxide as raw materials, glycerol and ethanol as solvent, and their phases and morphologies were characterized by liquid-phase reaction and calcination. The photocatalytic degradation of rhodamine B (Rh B) showed that it was a pure Bi 2 GeO 5 material with uniform rod-like morphology and good photocatalytic activity. With the increase of Bi 2 GeO 5 concentration, Rh B was significantly increased and then decreased, the Bi 2 GeO 5 concentration was 1.5 g / L, and the photodegradation rate reached 90.4% after 150 min of light irradiation.The complexes formed by bismuth ion and ethylene glycol self-assembled into nanorod structures during the hydrothermal process, Ion exchange reaction with the free germanate ions in the solution to form a Bi 2 GeO 5 nanorod material.