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中文摘要：
采用水热法，在不同pH（1．0-11．0）条件下制备了磷酸铋（BiPO4）纳米催化剂，并运用X射线衍射仪，扫描电子显微镜，比表面仪和循环伏安法对催化剂进行了初步表征，说明pH是影响BiPO4催化剂比表面积和结晶度的重要因素．在紫外光（A≤387nm）照射下，以染料罗丹明B（Rhodamine，RhB）作为目标化合物，研究了不同pH制备条件下BiPO4降解RhB的光催化特性．结果表明：在pH=1．0条件下，制备所得的BiPO4为高结晶度的单斜相，具有完整的一维棒状结构，能在80min内将初始浓度为1．25×10^-5mol·L^-1的RhB完全脱色，18h后对初始浓度为7．25×10^-5mol·L^-1RhB矿化率可达99．9％．催化剂结晶度和晶型是影响其光催化活性的重要因素．采用酶催化及荧光分析法，跟踪测定了光催化反应过程中产生的双氧水（H2O2）和羟基自由基（·OH）等氧化物种，表明其光催化反应涉及羟基自由基反应历程．
英文摘要：
BiPO4 nanorods were synthesized under different pH conditions using hydrothermal method. The BiPO4 nanorods were characterized using X ray diffraction （XRD）, scanning electron microscope （SEM）, specific surface area analyzer（BET） and cyclic voltammetry （CV）. The results indicate that the prepared BiPO4 is monoclinic phase and has completely rod-like structure when the reaction was at pH 1. Under ultraviolet irradiation （A ≤387 nm）, rhodamine B （RhB） was used as the target compound to study the photocatalytic activity of catalyst BiPO4. It showes that RhB was decolorized in 80 min and the mineralization rate reached 99.9% in 18 h, indicating that BiPO4 nanorods have good photocatalytic activity for the photo-degradation of RhB. The crystallinity and crystal form are the important factors that affect the photocatalytic activity. To reveal the degradation mechanism of BiPQ nanorods/RhB system, the concentration of H2O2 and hydroxyl radical （ ~ OH） were determined by enzyme catalysis and fluorescence analysis methods. It indicates that this system primarily involves ~ OH oxdiation process.
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