GaOOH/α-Ga_(2)O_(3)微纳米结构的可控制备及其光催化性能研究  

Controllable preparation and photocatalytic performance of GaOOH/α-Ga_(2)O_(3) nanostructures

作　　者：杜彬[1] 周慧[1] 罗志臣[1] DU Bin;ZHOU Hui;LUO Zhi-chen(College of Chemical Engineering,Yangzhou Polytechnic Institute,Yangzhou 225127,China)

机构地区：[1]扬州工业职业技术学院,江苏扬州225127

出　　处：《化学研究与应用》2022年第6期1417-1422,共6页Chemical Research and Application

基　　金：国家自然科学基金项目(21673201)资助;苏教师〔2019〕3号江苏高校“青蓝工程”优秀教学团队(2019-69)资助;扬州工业职技术学院自然科学类2021年重点课题资助(2021xjzk004)。

摘　　要：以Ga(NO_(3))_(3)为镓源,尿素为均相沉淀剂,在PEG4000(DL(天冬氨酸形成的复合软模板体系中,通过简单常压加热回流低温水热法成功合成出形貌和尺寸较为均一的GaOOH微球体,探讨了DL-天冬氨酸、PEG4000等添加剂对前驱体形貌和尺寸的影响。前驱体经450℃煅烧3 h后转变为形貌保持性良好的α-Ga_(2)O_(3)微球体。样品通过扫描电镜(SEM)、透射电镜(TEM)、傅里叶转换红外光谱(FT(IR)、X射线衍射(XRD)、紫外(可见吸收光谱(UV(Vis)及荧光等手段进行表征和分析。以制备的α-Ga_(2)O_(3)微球体为光催化剂,考察了α-Ga_(2)O_(3)对甲基紫的光催化降解作用,结果表明:经紫外光照射100 min,所制备的α-Ga_(2)O_(3)微球体催化剂对甲基紫的脱色率高达99.85%。Using Ga(NO_(3))_(3)as gallium source and urea as homogeneous precipitator,GaOOH microspheres with uniform morphology and size were successfully synthesized by simple atmospheric heating reflux and low temperature hydrothermal method in the composite soft template system formed by PEG4000(DL-aspartic acid.The effects of DL-aspartic acid,PEG4000 and other additives on the morphology and size of the precursors were discussed.The precursor was calcined at 450°C for 3 h and then transformed intoα-Ga_(2)O_(3)microsphere with good morphology retention.The samples were characterized and analyzed by scanning electron microscopy(SEM),transmission electron microscopy(TEM),Fourier transform infrared spectroscopy(FTIR),X-ray diffraction(XRD),ultraviolet-visible absorption spectroscopy(UV-Vis)and fluorescence.The photocatalytic degradation of methyl violet byα-Ga_(2)O_(3)microspheres was investigated.The results showed that the decolorization rate of methyl violet byα-Ga_(2)O_(3)microspheres catalyst was up to 99.85%after 100 minutes of ultraviolet irradiation.

关 键 词：GaOOH/α-Ga_(2)O_(3) 水热法 复合软模板 光催化 

分 类 号：O614.3[理学—无机化学]