title: Photocatalytic decomposition of Congo red under visible light irradiation using MgZnCr-TiO2layered double hydroxide.
abstract: The new nanophotocatalyst MgZnCr-TiO2was prepared by co-precipitation under different molar ratio of metals (Zn:Cr) and the loaded amount of TiO2. And it was characterized by X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy et al. Langmuir model fitted well the adsorption isotherm with the value of R20.9765, the maximum adsorption capacity was 526.32 mg g-1, the adsorption followed pseudo second order kinetic by MgZnCr-TiO2(1:1:2-0.05). The photocatalytic oxidation of Congo red was used to determine the photocatalytic performance of MgZnCr-TiO2(1:1:2-0.05) under visible light irradiation, and the removal rate reached 98% after reaction for 40 min. The degradation mechanism of Congo red also was proposed, and the MgZnCr-TiO2(1:1:2-0.05) was stable after five cycles. Compared to the adsorption, Congo red was removed fundamentally by photocatalysis and it is expected to be an effective way to eliminate Congo red.
authors: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China.
authors: Chi
authors: C
authors: Ma
authors: Institute of Physical Education, Xinjiang Normal University, Urumqi, 830054, China.
authors: Fenghua
authors: F
authors: Wang
authors: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China. Electronic address: zhangchang@hnu.edu.cn.
authors: Chang
authors: C
authors: Zhang
authors: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China.
authors: Zhigang
authors: Z
authors: Yu
authors: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China.
authors: Jingjing
authors: J
authors: Wei
authors: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China.
authors: Zhongzhu
authors: Z
authors: Yang
authors: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China.
authors: Yongqiu
authors: Y
authors: Li
authors: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China.
authors: Zihao
authors: Z
authors: Li
authors: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China.
authors: Mengying
authors: M
authors: Zhu
authors: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China.
authors: Liuqing
authors: L
authors: Shen
authors: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China.
authors: Guangming
authors: G
authors: Zeng
mesh_terms: D000327:Adsorption; D004396:Coloring Agents / Q000737:chemistry / Q000528:radiation effects*; D003224:Congo Red / Q000737:chemistry / Q000528:radiation effects*; D008027:Light; D053768:Metal Nanoparticles / Q000032:analysis*; D010084:Oxidation-Reduction; D056951:Photoelectron Spectroscopy; D010782:Photolysis; D013059:Spectrum Analysis, Raman; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000528:radiation effects*; D014961:X-Ray Diffraction
chemical_list: D004396:Coloring Agents; D014874:Water Pollutants, Chemical; D003224:Congo Red
keywords: Adsorption; Congo red; MgZnCr–TiO(2); Photodegradation; Visible light irradiation