A novel Ag/AgBr/Nb2O5 heterojunction photocatalyst was successfully developed via a facile solvothermal method combined with deposition–precipitation. The morphology and composition of the Ag/AgBr/Nb2O5 photocatalyst were investigated by transmission electron microscopy and X-ray energy-dispersive spectrometry, respectively. The results showed that metallic Ag was formed on the surface of the AgBr by an in situ photoreaction. The low crystalline Nb2O5 (L-Nb2O5) substrate provides the photocatalyst with a high specific area and numerous active sites for catalysis, while the combination of the Ag/AgBr with L-Nb2O5 effectively facilitates the separation of photo-generated charge carriers. The photocatalytic activities of the samples were measured using the degradation of an aqueous solution of rhodamine B under different LEDs with UV (365 nm), yellow (595 nm), and white (400 nm ≤ λ ≤ 800 nm) light. The Ag/AgBr/L-Nb2O5 photocatalyst displayed a much higher photocatalytic activity than bare L-Nb2O5 under UV and visible-light irradiation.

通过简便的溶剂热法结合沉积-沉淀法成功开发了一种新型的Ag / AgBr / Nb 2 O 5异质结光催化剂。用透射电子显微镜和X射线能谱仪分别研究了Ag / AgBr / Nb 2 O 5光催化剂的形貌和组成。结果表明，通过原位光反应在AgBr的表面上形成金属Ag 。低结晶Nb 2 O 5（L-Nb 2 O 5底物为光催化剂提供了高的比表面积和众多的催化活性位点，而Ag / AgBr与L-Nb 2 O 5的组合有效地促进了光生载流子的分离。使用若丹明B的水溶液在不同的LED下用紫外线（365 nm），黄色（595 nm）和白色（400 nm≤λ≤800 nm）的光降解来测量样品的光催化活性。在紫外线和可见光照射下，Ag / AgBr / L-Nb 2 O 5光催化剂显示出比裸露的L-Nb 2 O 5高得多的光催化活性。