CAJ | 학술논문

以Bi（NO3）3·5H2O和NH4VO3为原料，采用微波水热法在200℃不同前驱液碱浓度下制备了BiVO4粉体。利用XRD、FE-SEM、BET、UV-Vis等手段研究了前驱液碱浓度对BiVO4晶型、结构及形貌的影响，并对不同前驱液碱浓度下合成粉体的光催化性能进行了研究。溶于纯水获得的粉体是单斜相和四方相1-3μm八面体结构的BiVo。混晶。溶于HNO。和NaOH溶液时制得粉体为纯单斜相3μm大小球状BiVO4，NaOH增加到4mol／L时为2tam大小鱼排骨状BiVO4的混晶。光催化结果表明，紫外光下光催化活性顺序为：BiVO4（纯水）〉BiV04（4mol／LNaOH）〉BiVO4（2mol／LNaOH），可见光下光催化活性顺序为：BiVO4（4mol／LNaOH）〉BiVO4（纯水）〉BiVO4（2tool／LNaOH）。
이Bi（NO3）3·5H2O화NH4VO3위원료，채용미파수열법재200℃불동전구액감농도하제비료BiVO4분체。이용XRD、FE-SEM、BET、UV-Vis등수단연구료전구액감농도대BiVO4정형、결구급형모적영향，병대불동전구액감농도하합성분체적광최화성능진행료연구。용우순수획득적분체시단사상화사방상1-3μm팔면체결구적BiVo。혼정。용우HNO。화NaOH용액시제득분체위순단사상3μm대소구상BiVO4，NaOH증가도4mol／L시위2tam대소어배골상BiVO4적혼정。광최화결과표명，자외광하광최화활성순서위：BiVO4（순수）〉BiV04（4mol／LNaOH）〉BiVO4（2mol／LNaOH），가견광하광최화활성순서위：BiVO4（4mol／LNaOH）〉BiVO4（순수）〉BiVO4（2tool／LNaOH）。
Under different alkali concentrations of the precursor solution BiVO4 powers were synthesized by microwave-hydrothermal method at 200℃, using Bi（NO3）3·5H2O and N H4VO3 powders as raw materials. The phases, structures and morphologies of BiVO4 photoeatalysts were characterized respectively by XRD, FESEM, BET, and UV-Vis methods. The photocatalytic properties of the BiVO4 powders prepared under the dif-ferent alkali concentrations were also studied. The powder prepared under the precursor dissolved deionized wa- ter was BiVO4 mixed crystal with monoclinic phases and tetragonal phases with 1-3μm octahedral structure. When the precursor was dissolved into HNOa and NaOH solutions, the as-prepared powder was 3μm pure monoclinic ball-like BiVO4. When the concentration of NaOH was increased to 4mol/L, the powder became the mixed crystal with 2μm fishbone-like BiVO4. The results of photocatalytic activity show that the order of the photocatalytic activities under UV-light was BiVO4 （deionized water）〉BiVO4 （4mol/L NaOH）〉BiVO4 （2mol/L NaOH）. Under the visible-light irradiation, the order was BiVO4（4mol/L NaOH）〉 BiVO4 （deionized water）〉BiVO4 （2mol/L NaOH）.