CAJ | 학술논문

采用简单的水热法结合离子交换法制备了BiPO4@Ag3 PO4核/壳异质结光催化剂，采用场发射扫描电子显微镜(FE-SEM)、透射电子显微镜(TEM)、紫外-可见漫反射光谱仪(DRS)和 X 射线光电子能谱仪(XPS)等对催化剂的形貌、组成、晶型和光物理性质等进行了研究，用罗丹明B(RhB)为模拟水体中有机污染物分别在可见光和模拟太阳光照条件下对催化剂的催化活性进行了测试。结果表明，负载 Ag3 PO4的BiPO4微米棒具有较高的可见光响应，其核/壳异质结结构有利于光生电子-空穴对的有效分离和提高对RhB的光催化降解效率，在可见光和模拟太阳光照射条件下分别在60和40 min可使RhB完全脱色降解。活性物种检测实验结果证明，该催化剂在污染物降解过程中主要的机理是光生空穴的直接氧化。
채용간단적수열법결합리자교환법제비료BiPO4@Ag3 PO4핵/각이질결광최화제，채용장발사소묘전자현미경(FE-SEM)、투사전자현미경(TEM)、자외-가견만반사광보의(DRS)화 X 사선광전자능보의(XPS)등대최화제적형모、조성、정형화광물이성질등진행료연구，용라단명B(RhB)위모의수체중유궤오염물분별재가견광화모의태양광조조건하대최화제적최화활성진행료측시。결과표명，부재 Ag3 PO4적BiPO4미미봉구유교고적가견광향응，기핵/각이질결결구유리우광생전자-공혈대적유효분리화제고대RhB적광최화강해효솔，재가견광화모의태양광조사조건하분별재60화40 min가사RhB완전탈색강해。활성물충검측실험결과증명，해최화제재오염물강해과정중주요적궤리시광생공혈적직접양화。
BiPO4@Ag3 PO4 core/shell heterojuction photocatalyst was synthesized through a facile hydrother-mal process followed by the ion-exchange method. The morphology, crystallinity, composition, and photophy-sical properties of the catalyst were systematically investigated by scanning electron microscope( SEM) , X-ray diffraction(XRD), energy dispersive X-ray analysis, UV-Vis diffuse reflectance spectrophotometer(DRS) and X-ray photoelectron spectroscopy( XPS) . Meanwhile, Rhodamine B( RhB) was chosen as the target pollutant to evaluate the photocatalytic activity of BiPO4@Ag3 PO4 photocatalyst under the visible light and simulated sunlight irradiation, respectively. The results show that RhB was almost totally degraded in 60 min under visi-ble-light irradiation and in 40 min under sunlight irradiation, respectively. The BiPO4@Ag3 PO4 core/shell heterojunction photocatalyst displayed enhanced photocatalytic activity against RhB, which is attributed to the effective charge separation by the core/shell heterojuction between the Ag3 PO4 and BiPO4 . Active species de-tection experiments proved that during the process of degradation of pollutants over the core/shell microrods, the main mechanism was the direct oxidation process by the photo-induced holes. Ag3 PO4 shell can improve the absorption of the visible light effectively and also enhance the stability, dispersibility and photocatalytic ac-tivity of the photocatalyst. The BiPO4@AgPO4 photocatalysts show attractive potential applications in pollution control, water splitting and solar cell.