简便合成几种铋、锡化合物及在光电化学和染料去除中的应用-分析化学专业论文.docxVIP

ABSTRACTIn ABSTRACT In recent years，Bi and Sn compounds have attracted great attention due to their excellent performances in photocatalysis， photoelectrochemistry,etc．In this paper,several Bi and Sn compounds have been synthesized by mild hydrolysis and then applied to photoelectrochemistry， adsorptive removal and photocatalytic degradation of dyes．The main research contents are as follows： (1) [Bi60s(OH)3](N03)5’3 HaO／Bi2S3 heterostructured colloidal nanoparticles have been synthesized by a hydrolysis—sulfuration method． Then，the colloid was modified onto FTO conductive glass to form corresponding semiconductor films．The influences of the amount of Na2S added，the layer number modified and the heat treatment temperature on the photoelectrochemical performance was investigated and the corresponding mechanism was also discussed． (2)A new adsorbent of an octahedron-structured basic bismuth(111) nitrate Was synthesized via a mild hydrolysis route at room temperature． The adsorption process was studied using MO as the model molecule by optimizing experimental variables include the influence of pH,dosage， contact time，temperature，and initiN MO concentration．The adsorption equilibriumisotherms，kineticsandthermodynamicswereanalyzed，and the adsorption mechanism was also proposed． (3)Tin dioxide nanophotocatalyst was synthesized via a hydrolysis 111 万方数据 route route followed by heat treatment．The catalytic process was studied using MO as the model molecule by optimizing experimental variables including the treatment temperature and initial MO concentration．The kinetics was analyzed and the adsorption mechanism was also discussed． Keywords：Tin dioxide， basic bismuth nitrate，hydrolysis， photoelectrochemistry，adsorption，photocatalytic degradation，methyl orange． Ⅳ 万方数据 目 目 录 中文摘要 ．I ABSTRACT ． ． ．III 第一章绪论 1 1．1 Bi基化合物半导体研究概况 1 1．1．1 Bi基化合物半导体 1 1．1．2硫化铋半导体材料 1 1．1．3铋的非金属氧酸盐材料 2 1．1．4铋系异质结型复合材料 2 1．2 Sn02光催化剂的研究概况 3 1．3我国水资源现状 ．3 1．4染料概述 ．4 1．4．1甲基橙简介 4 1．5染料废水的