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发明公开
CN107352582A 一种PrVO4纳米纤维光催化剂及其制备方法 审中-实审

一种PrVO4纳米纤维光催化剂及其制备方法
摘要：
本发明公开了一种PrVO4纳米纤维光催化剂及其制备方法。本发明以Pr(NO3)3·6H2O为镨源，2Na-EDTA为络合剂，NH4VO3为钒源，后二者共同控制整个反应体系的pH值以使其呈弱酸性(pH＝5-6)，在此条件下，VO3-缩合为V3O93-，再采用简单温和、环境友好的水热方法，V3O93-与Ce3+反应生成PrVO4。温和的反应体系为纳微米材料的生长提供了合适的环境，通过控制Pr(NO3)3·6H2O、2Na-EDTA和NH4VO3的摩尔比为1︰1︰1，从而控制所得产物为纯的四方相的PrVO4纳米晶，其直径约为30nm，长度约为500nm的纳米纤维，且粒径分布均匀。整个反应体系没有使用毒性大、危险性大的有机溶剂，反应过程无需添加表面活性剂、模板剂或其他任何有机物，没有苛刻的合成条件要求，成本低廉。合成的催化剂高效，稳定、无毒、应用广、易回收、可重复使用。
摘要（英）：

The invention discloses a PrVO4 nano-fiber photocatalyst and a preparation method thereof. The PrVO4 nano-fiber photocatalyst takes Pr(NO3)3.6H2O as a praseodymium source, 2Na-EDTA (disodium ethylene diamine tetraacetate) as a complexing agent and NH4VO3 as a vanadium source; the 2Na-EDTA and the NH4VO3 are used for commonly controlling the pH (Potential of Hydrogen) value of a whole reaction system so that the system has weak acidity (pH is equal to 5 to 6); under the condition, VO<3-> is condensed into V3O9<3->; then the V3O9<3-> and Ce<3+> react to generate PrVO4 by adopting a simple, moderate and environment-friendly hydrothermal method. A moderate reaction system provides a suitable environment for the growth of a micro-nano material and the mole ratio of the Pr(NO3)3.6H2O to the 2Na-EDTA to the NH4VO3 is controlled to be 1 to 1 to 1, so that an obtained product is a pure PrVO4 nano-crystal with a tetragonal phase; the diameter of nano-fibers is about 30nm and the length of the nano-fibers is about 500nm; the grain size distribution is uniform. The whole reaction system does not utilize organic solvents with great toxicity and great dangers, and a surfactant, a template agent or other organic matters do not need to be added in a reaction process; the reaction system has no demanding synthetic condition requirements and the cost is low. The synthesized catalyst is efficient and stable, has no toxin and wide application, is easy to recycle and can be repeatedly utilized.

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