Fluorescence response mechanism of green synthetic carboxymethyl chitosan-Eu3+ aerogel to acidic gases

Yuanhang Li; Zhiyuan Zhang; Zhengquan Fu; Di Wang; Chengyu Wang; Jian Li

doi:10.1016/j.ijbiomac.2021.10.073

Fluorescence response mechanism of green synthetic carboxymethyl chitosan-Eu³⁺ aerogel to acidic gases

Int J Biol Macromol. 2021 Dec 1:192:1185-1195. doi: 10.1016/j.ijbiomac.2021.10.073. Epub 2021 Oct 19.

Authors

Yuanhang Li¹, Zhiyuan Zhang², Zhengquan Fu³, Di Wang⁴, Chengyu Wang⁵, Jian Li⁶

Affiliations

¹ Key Laboratory of Bio-based Material Science & Technology, Ministry of Education, Northeast Forestry University, Harbin 150040, China; Engineering Research Center of Advanced Wooden Materials, Ministry of Education, Northeast Forestry University, Harbin 150040, China; College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China. Electronic address: lyh@nefu.edu.cn.
² Key Laboratory of Bio-based Material Science & Technology, Ministry of Education, Northeast Forestry University, Harbin 150040, China; Engineering Research Center of Advanced Wooden Materials, Ministry of Education, Northeast Forestry University, Harbin 150040, China; College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China. Electronic address: blairzhang96@nefu.edu.cn.
³ Key Laboratory of Bio-based Material Science & Technology, Ministry of Education, Northeast Forestry University, Harbin 150040, China; Engineering Research Center of Advanced Wooden Materials, Ministry of Education, Northeast Forestry University, Harbin 150040, China; College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China. Electronic address: fzq1999fzq@163.com.
⁴ Key Laboratory of Bio-based Material Science & Technology, Ministry of Education, Northeast Forestry University, Harbin 150040, China; Engineering Research Center of Advanced Wooden Materials, Ministry of Education, Northeast Forestry University, Harbin 150040, China; College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China. Electronic address: diwang1030@nefu.edu.cn.
⁵ Key Laboratory of Bio-based Material Science & Technology, Ministry of Education, Northeast Forestry University, Harbin 150040, China; Engineering Research Center of Advanced Wooden Materials, Ministry of Education, Northeast Forestry University, Harbin 150040, China; College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China. Electronic address: wangcy@nefu.edu.cn.
⁶ Key Laboratory of Bio-based Material Science & Technology, Ministry of Education, Northeast Forestry University, Harbin 150040, China; Engineering Research Center of Advanced Wooden Materials, Ministry of Education, Northeast Forestry University, Harbin 150040, China; College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China. Electronic address: nefujianli@163.com.

PMID: 34678380
DOI: 10.1016/j.ijbiomac.2021.10.073

Abstract

Industrial waste acidic gases are huge hazards to the environment and human health, so a material that can detect and remove them is needed. In this paper, CM chitosan-Eu³⁺ fluorescence aerogel was prepared via a green method by combining the carboxymethyl chitosan biomass polymer with Eu³⁺ ions, the structure and properties of this aerogel were characterized by SEM, TG, and stress-strain curves. The coordination of Eu³⁺ ions and carboxymethyl chitosan was analyzed with XPS and the difference in luminescence intensity of aerogel prepared at different pH values was analyzed. The monitoring of the aerogels revealed different responses to different acidic gases, and the fluorescence intensity of the aerogel showed a linear decrease with the adsorbed hydrogen chloride gas (HCl), while acetic acid gas (HAc) enhanced fluorescence. The adsorption system of the CM chitosan-Eu³⁺ aerogel was simulated using pseudo-second-order kinetics, which showed that the maximum adsorption capacity of HCl is 9.16 mmol/g. The different response mechanisms of HCl and HAc gas were analyzed with FT-IR, fluorescence lifetime imaging and Judd-Ofelt theory. This fluorescence aerogel was found to have potential applications in ensuring industrial production safety.

Keywords: Acid gas; Carboxymethyl chitosan aerogel; Eu(3+); Fluorescence response.

MeSH terms

Adsorption
Chemical Phenomena
Chemistry Techniques, Synthetic
Chitosan / analogs & derivatives*
Chitosan / chemistry
Environmental Pollutants / analysis
Environmental Pollutants / chemistry*
Fluorescence*
Gases / analysis
Gases / chemistry*
Gels / chemical synthesis
Gels / chemistry*
Green Chemistry Technology
Organometallic Compounds / chemistry*
Thermodynamics

Substances

Environmental Pollutants
Gases
Gels
Organometallic Compounds
carboxymethyl-chitosan
Chitosan