黎素,张博,谢春生,张扬,肖纯.Bi-FeC2O4复合催化剂活化过硫酸盐降解罗丹明B[J].环境科学学报,2021,41(7):2796-2805
Bi-FeC2O4复合催化剂活化过硫酸盐降解罗丹明B
- Catalytic degradation of Rhodamine B by Bi-FeC2O4 composite activated persulfate
- 基金项目:肇庆市科技创新指导类项目(No.202004030204,201904030201);肇庆学院校级科研基金项目(No.202012,202021,202022)
- 黎素
- 1. 肇庆学院环境与化学工程学院, 肇庆 526061;2. 广东省环境健康与资源利用重点实验室, 肇庆 526061
- 张博
- 1. 肇庆学院环境与化学工程学院, 肇庆 526061;2. 广东省环境健康与资源利用重点实验室, 肇庆 526061
- 谢春生
- 1. 肇庆学院环境与化学工程学院, 肇庆 526061;2. 广东省环境健康与资源利用重点实验室, 肇庆 526061
- 张扬
- 1. 肇庆学院环境与化学工程学院, 肇庆 526061;2. 广东省环境健康与资源利用重点实验室, 肇庆 526061
- 肖纯
- 1. 肇庆学院环境与化学工程学院, 肇庆 526061;2. 广东省环境健康与资源利用重点实验室, 肇庆 526061
- 摘要:采用溶剂热法将Bi单质附着于草酸亚铁(FeOx)上,制备了系列Bi-FeOx复合催化剂并用于活化过硫酸盐.通过X射线衍射仪(XRD)、傅里叶变换红外光谱仪(FT-IR)、扫描电子显微镜(SEM)、X射线光电子能谱仪(XPS)等表征方法对复合催化剂的结构、形貌和元素价态进行表征.以罗丹明B(RhB)为降解对象,研究了Bi-FeOx/过硫酸盐/可见光体系中Bi单质含量、催化剂投加量、pH及过硫酸盐浓度等因素对RhB的降解影响.在最佳条件下,反应5 min后,RhB的降解率高达99.8%.Bi的引入,使得复合催化剂增强了对可见光的吸收,提高了光生电子的传输效率,从而加速了对RhB的降解.
- Abstract:Pure bismuth (Bi) metal‐modified ferrous oxalate (FeOx) composites (Bi-FeOx) were prepared by solvothermal method and used in the persulfate activated system. Bi-FeOx was characterized by XRD, FT-IR, SEM and XPS. The catalytic degradation performance of Rhodamine B (RhB) by the prepared samples was evaluated. The effects of Bi element content, catalyst dosage, pH and persulfate concentration on the degradation of RhB were studied in Bi-FeOx/persulfate/visible light system. Under the optimal conditions, the degradation rate of RhB was 99.8% within 5 min. The introduction of Bi can enhance the absorption of visible light of the composite catalyst, increase the transmission efficiency of photogenerated electrons, resulting in accelerating the degradation of RhB.