NaBiS2 decorated polysaccharide sponges for adsorption-photocatalytic degradation of dye under visible light illumination

Chang Liu; Junyang You; Yuzhu Li; Hongbao Zhu; Lei Xia; Xupin Zhuang

doi:10.1016/j.carbpol.2023.121072

NaBiS₂ decorated polysaccharide sponges for adsorption-photocatalytic degradation of dye under visible light illumination

Carbohydr Polym. 2023 Sep 15:316:121072. doi: 10.1016/j.carbpol.2023.121072. Epub 2023 May 30.

Authors

Chang Liu¹, Junyang You², Yuzhu Li², Hongbao Zhu², Lei Xia³, Xupin Zhuang⁴

Affiliations

¹ State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, PR China; School of Textile Science and Engineering, Tiangong University, Tianjin 300387, PR China.
² State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, PR China.
³ State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, PR China. Electronic address: xialei@tiangong.edu.cn.
⁴ State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, PR China; School of Textile Science and Engineering, Tiangong University, Tianjin 300387, PR China. Electronic address: zhxupin@tiangong.edu.cn.

PMID: 37321713
DOI: 10.1016/j.carbpol.2023.121072

Abstract

Dye is emissions aggravating aquatic ecosystem pollution, and photocatalysis is considered the most appealing option to remove dyes by degradation. However, the current photocatalysts suffer from agglomeration, large bandgaps, high mass transfer resistance, and high operation cost. Herein, we present a facile hydrothermally induced phase separation and in situ synthesis strategy for fabrication of sodium bismuth sulfide (NaBiS₂)-decorated chitosan/cellulose sponges (NaBiCCSs). The NaBiCCSs demonstrate unique polysaccharide cellular structure (150-500 μm), uniformly immobilized NaBiS₂ nanoparticles (70-90 nm), narrow bandgap (1.18 eV), high photocurrent (0.74 μA/cm²), and outstanding compressibility. Benefiting from the characteristics and the high affinity to dyes, the NaBiCCSs provide innovative synergistic adsorption-photocatalytic degradation model for dye removal, attaining a superior methylene blue removal rate of 98.38 % under visible light illumination and offering good reusability. This study offers a sustainable technical solution for dye contaminant removal.

Keywords: Adsorption-photocatalytic degradation; Cellulose; Chitosan; Dye removal; NaBiS(2) nanoparticles; Visible light.

MeSH terms

Adsorption
Catalysis
Cellulose
Coloring Agents* / chemistry
Ecosystem
Light
Lighting*

Substances

Coloring Agents
Cellulose