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Aqueous-Phase Cellulose Hydrolysis over Zeolite HY Nanocrystals Grafted on Anatase Titania Nanofibers

Shan, Longlong; Yan, Jun; Wang, Yang; Ke, Xuebin; Cai, Junmeng; Yu, Shirui; Lee, Adam F.; Gu, Xiaoli; Zhang, Xingguang

Authors

Longlong Shan

Jun Yan

Yang Wang

Junmeng Cai

Shirui Yu

Adam F. Lee

Xiaoli Gu

Xingguang Zhang



Abstract

© 2020, Springer Science+Business Media, LLC, part of Springer Nature. Acid-catalyzed aqueous-phase hydrolysis of cellulose was investigated over zeolite HY nanocrystals grafted on anantase titania nanofibres (HY-TiO2). H-exchanged NaY zeolite nanocrystals of controlled size (40–60 nm) were synthesized and deposited over TiO2 nanofibres prepared by hydrothermal treatment of anatase nanoparticles. The resulting materials were characterized by XRD, SEM, TEM, NH3-TPD and FT-IR, and evidenced a homogeneous distribution of HY nanocrystals across the TiO2 nanofibres. HY-TiO2 catalysts exhibited higher turnover numbers and selectivity to glucose than large (500 nm to 2 μm) unsupported HY nanoparticles; this performance enhancement is attributed to the greater accessibility of Brønsted acid sites in HY nanocrystals to cellulose particles. The importance of active site accessibility to β-1,4-glycosidic bond cleavage was highlighted by a significant increase in the rates of glucose and cellobiose hydrolysis (versus cellulose) over HY-TiO2-100. Engineering of zeolite particle size is a critical design parameter for the valorization of sterically-challenging cellulosic feedstocks. Graphic Abstract: [Figure not available: see fulltext.].

Citation

Shan, L., Yan, J., Wang, Y., Ke, X., Cai, J., Yu, S., …Zhang, X. (2021). Aqueous-Phase Cellulose Hydrolysis over Zeolite HY Nanocrystals Grafted on Anatase Titania Nanofibers. Catalysis Letters, https://doi.org/10.1007/s10562-020-03402-w

Journal Article Type Article
Acceptance Date Sep 21, 2020
Online Publication Date Sep 29, 2020
Publication Date 2021
Deposit Date Mar 3, 2021
Publicly Available Date Sep 30, 2021
Journal Catalysis Letters
Print ISSN 1011-372X
Electronic ISSN 1572-879X
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
DOI https://doi.org/10.1007/s10562-020-03402-w
Keywords Cellulose; Glucose; Hydrolysis; Diffusion; Zeolite nanocrystals
Public URL https://hull-repository.worktribe.com/output/3637008