【摘要】 采用离子交换法制备了Zn²⁺在Ga-位不等价掺杂的功能陶瓷材料(β-CuGa_1-xZn_xO₂).通过X射线衍射（XRD）和透射电子显微镜（TEM）对材料的晶体结构进行表征,通过原位高温X射线衍射（HT-XRD）和同步热分析仪（TG-DSC）对材料的热稳定性进行表征,通过紫外-可见漫散射光谱（UV-Vis DRS）以及第一性原理计算对材料的光学性质进行研究,并通过甲基橙（MO）的降解反应评价了Zn²⁺在Ga-位的引入对该功能陶瓷光催化性能的影响.结果显示, Zn²⁺的引入引起带隙变宽,吸光范围变窄,自发极化变小,进而导致单位时间内生成的高活性物质减少,不利于降解反应.通过光致发光光谱（PL）对降解机理进行了初步探究.根据实验结果提出了改进β-CuGaO₂性质的可能方法.更多还原

【Abstract】 Functional ceramic material with unequal doping of Zn²⁺ at the Ga-site,β-CuGa_1-xZn_xO₂,were synthesized via ion exchange method. Firstly,the crystal structure of the material was investigated by means of X-ray diffraction（XRD）and transmission electron microscopy（TEM）. Furthermore,the thermal stability of the material was studied by in-situ high temperature X-ray diffraction（HT-XRD）and synchronous thermal analyzer（TG-DSC）. Next,the optical properties of the material were assessed by UV-Vis diffuse scattering spectroscopy（UV-Vis DRS）and first principles calculations. Then,the effect of the introduction of Zn²⁺ at the Ga-site on the performance of the ceramic was evaluated by the degradation reaction of methyl orange（MO）.The results showed that the introduction of Zn²⁺ is unfavorable to the degradation reaction. Finally,the degradation mechanism was investigated by photoluminescence spectroscopy（PL）. In summary,based on the above experimental results,another possible method to improve the properties of β-CuGaO₂ is proposed.更多还原