Polydopamine/Fe3O4 modified wood-based evaporator for efficient and continuous water purification

Dexing Jiang; Yaohui Dai; Yuwei Jiang; Wenquan Yu; Deyuan Ma; Long Bai; Pengfei Huo; Zhiguo Li; Yang Liu

doi:10.1016/j.jcis.2023.08.168

Polydopamine/Fe₃O₄ modified wood-based evaporator for efficient and continuous water purification

J Colloid Interface Sci. 2023 Dec 15;652(Pt B):1271-1281. doi: 10.1016/j.jcis.2023.08.168. Epub 2023 Aug 26.

Authors

Dexing Jiang¹, Yaohui Dai¹, Yuwei Jiang², Wenquan Yu², Deyuan Ma², Long Bai¹, Pengfei Huo¹, Zhiguo Li³, Yang Liu⁴

Affiliations

¹ College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, PR China; Key Laboratory of Bio-based Materials Science & Technology, Ministry of Education, Northeast Forestry University, Harbin 150040, PR China.
² College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, PR China.
³ College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, PR China; Key Laboratory of Bio-based Materials Science & Technology, Ministry of Education, Northeast Forestry University, Harbin 150040, PR China. Electronic address: lizgmse@nefu.edu.cn.
⁴ College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, PR China; Key Laboratory of Bio-based Materials Science & Technology, Ministry of Education, Northeast Forestry University, Harbin 150040, PR China. Electronic address: liuyang@nefu.edu.cn.

PMID: 37659300
DOI: 10.1016/j.jcis.2023.08.168

Abstract

Solar interfacial evaporation is a highly promising technology for seawater desalination and wastewater treatment, while the simple preparation processes and efficient production of clean water based on biomass interfacial evaporators still need further exploration and development. Here, we reported a wood-based evaporator (PFDW) loaded with Fe₃O₄ and polydopamine (PDA) after simple immersion treatment at room temperature for efficient and continuous water purification. The synergistic photothermal effect of PDA coating and Fe₃O₄ particles enables the evaporator to achieve high photothermal conversion efficiency in the longer wavelength range, while combined with the rapid water transport capacity endowed by the vertically aligned microporous structure of natural wood, it achieved an evaporation rate of 1.70 kg m^-2h^-1 and an energy efficiency of 98.0% under 1 kW m^-2 irradiation. In addition, the prepared PFDW exhibited sustainable desalination stability and excellent removal efficiency for different water sources including organic dye wastewater, heavy metal effluent, oil-water emulsion and river water. This work provides a new avenue for efficient salt-tolerant portable evaporators.

Keywords: Fe(3)O(4); Polydopamine; Salt resistance; Synergistic photothermal effect; Wood-based evaporator.