Anion exchange synthesis of hollow β-In2S3 nanoparticles: Adsorption and visible light photocatalytic performances. Issue 1 (February 2019)

• Record Type: Journal Article
• Authors: Li, He; Yuan, Zhihao; Bittencourt, Carla; Li, Xiaojiang; Li, Wei; Chen, Minfang; Li, Wenjiang; Snyders, Rony
• Is Part Of: Journal of environmental chemical engineering. Volume 7:Issue 1(2019)
• Publication Date: 2019-02
• Subjects: Indium sulfide -- Hollow nanoparticles -- Ion exchange -- Photocatalytsis -- Adsorption -- Organic dye; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2019.102910
• Languages: English
• ISSNs: 2213-2929

Abstract

Highlights: Hollow β -In2 S3 nanoparticles were synthesized by anion exchange process. Superior adsorption and visible light photocatalytic performances for concentrated MB solution were achieved. Overall removal of MB efficiently reached 92.2%. Abstract: Crystal phase and morphology control of nano semiconductor materials play a key role on the optimization of their applications. Here, hollow β -In2 S3 nanoparticles (NPs) with higher surface area were synthesized via an anion exchange process under a hydrothermal condition. The adsorption capacity and photocatalytic activity of the hollow β -In2 S3 NPs were evaluated using Methylene blue (MB) as a model probe both under dark and visible light irradiation. The fast absorption and large adsorption capacity ( ca. 157.99 mg/g within 60 min) for MB in the solution were associated to the high specific surface area (324.6 m 2 /g) of the β -In2 S3 NPs as well as the electrostatic interaction between the β -In2 S3 and MB molecule, indicating that adsorption approach plays a crucial role for removing MB from solution. After the adsorption reaction, visible light photocatalytic reaction further degrades the remaining MB in the system. The highest removal efficiency of 100 mg/L of MB solution reached 73.4% under dark for 60 min, and further increased to 92.2% after visible light irradiation for 180 min. The Langmuir isotherm model and pseudo-second-order kinetics were used for the model of the adsorption behavior of MB onto the In2 S3 sample. The as-prepared hollow In2 S3 NPs might be anticipated to be used in dye wastewater treatment.