LignoPhot: Conversion of hydrolysis lignin into the photoactive hybrid lignin/Bi4O5Br2/BiOBr composite for simultaneous dyes oxidation and Co2+ and Ni2+ recycling

Tetyana M Budnyak; Joy Onwumere; Ievgen V Pylypchuk; Aleksander Jaworski; Jianhong Chen; Anna Rokicińska; Mikael E Lindström; Piotr Kuśtrowski; Olena Sevastyanova; Adam Slabon

doi:10.1016/j.chemosphere.2021.130538

LignoPhot: Conversion of hydrolysis lignin into the photoactive hybrid lignin/Bi₄O₅Br₂/BiOBr composite for simultaneous dyes oxidation and Co²⁺ and Ni²⁺ recycling

Chemosphere. 2021 Sep:279:130538. doi: 10.1016/j.chemosphere.2021.130538. Epub 2021 Apr 13.

Affiliations

¹ Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, 106 91, Stockholm, Sweden.
² Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44, Stockholm, Sweden.
³ Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Kraków, Poland.
⁴ Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Kraków, Poland; Wallenberg Wood Science Center (WWSC), Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44, Stockholm, Sweden.
⁵ Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, 106 91, Stockholm, Sweden. Electronic address: adam.slabon@mmk.su.se.

PMID: 33894514
DOI: 10.1016/j.chemosphere.2021.130538

Abstract

Valorization of lignin is still an open question and lignin has therefore remained an underutilized biomaterial. This situation is even more pronounced for hydrolysis lignin, which is characterized by a highly condensed and excessively cross-linked structure. We demonstrate the synthesis of photoactive lignin/Bi₄O₅Br₂/BiOBr bio-inorganic composites consisting of a lignin substrate that is coated by semiconducting nanosheets. The XPS analysis reveals that growing these nanosheets on lignin instead on cellulose prevents the formation of Bi⁵⁺ ions at the surface region, yielding thus a modified heterojunction Bi₄O₅Br₂/BiOBr. The material contains 18.9% of Bi₄O₅Br₂/BiOBr and is effective for the photocatalytic degradation of cationic methylene blue (MB) and zwitterionic rhodamine B (RhB) dyes under light irradiation. Lignin/Bi₄O₅Br₂/BiOBr decreases the dye concentration from 80 mg L^-1 to 12.3 mg L^-1 for RhB (85%) and from 80 mg L^-1 to 4.4 mg L^-1 for MB (95%). Complementary to the dye degradation, the lignin as a main component of the composite, was found to be efficient and rapid biosorbent for nickel, lead, and cobalt ions. The low cost, stability and ability to simultaneously photo-oxidize organic dyes and adsorb metal ions, make the photoactive lignin/Bi₄O₅Br₂/BiOBr composite a prospective material for textile wastewaters remediation and metal ions recycling.

Keywords: Adsorption; Bioinorganic interfaces; Hydrolysis lignin; Photocatalysis; Water treatment.

MeSH terms

Bismuth
Coloring Agents*
Hydrolysis
Lignin*

Substances

Coloring Agents
Lignin
bismuth oxybromide
Bismuth