Effect of ball-milling pretreatment of cellulose on Its photoreforming for H2 production

Lan, Lan, Chen, Huanhao, Lee, Daniel, Xu, Shaojun, Skillen, Nathan, Tedstone, Aleksander, Robertson, Peter, Garforth, Arthur, Daly, Helen, Hardacre, Christopher and Fan, Xiaolei 2022. Effect of ball-milling pretreatment of cellulose on Its photoreforming for H2 production. ACS Sustainable Chemistry and Engineering 10 (15) , pp. 4862-4871. 10.1021/acssuschemeng.1c07301

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Abstract

Photoreforming of cellulose is a promising route for sustainable H2 production. Herein, ball-milling (BM, with varied treatment times of 0.5–24 h) was employed to pretreat microcrystalline cellulose (MCC) to improve its activity in photoreforming over a Pt/TiO2 catalyst. It was found that BM treatment reduced the particle size, crystallinity index (CrI), and degree of polymerization (DP) of MCC significantly, as well as produced amorphous celluloses (with >2 h treatment time). Amorphous cellulose water-induced recrystallization to cellulose II (as evidenced by X-ray diffraction (XRD) and solid-state NMR analysis) was observed in aqueous media. Findings of the work showed that the BM treatment was a simple and effective pretreatment strategy to improve photoreforming of MCC for H2 production, mainly due to the decreased particle size and, specifically in aqueous media, the formation of the cellulose II phase from the recrystallization of amorphous cellulose, the extent of which correlates well with the activity in photoreforming

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry Cardiff Catalysis Institute (CCI)
Additional Information:	Attribution 4.0 International (CC BY 4.0)
Publisher:	American Chemical Society
ISSN:	2168-0485
Funders:	EPSRC and China Scholarship Council
Date of First Compliant Deposit:	1 July 2022
Date of Acceptance:	4 April 2022
Last Modified:	03 May 2023 15:05
URI:	https://orca.cardiff.ac.uk/id/eprint/150962

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