Novel mesoporous TiO2(B) whisker-supported sulfated solid superacid with unique acid characteristics and catalytic performances

Licheng Li; Haiqin Yue; Tuo Ji; Wei Li; Xuejuan Zhao; Lei Wang; Jie She; Xiaoli Gu; Xiaobao Li

doi:10.1016/j.apcata.2019.01.025

Novel mesoporous TiO2(B) whisker-supported sulfated solid superacid with unique acid characteristics and catalytic performances

Licheng Li
, Haiqin Yue
, Tuo Ji
, Wei Li
, Xuejuan Zhao
, Lei Wang
, Jie She
, Xiaoli Gu
, Xiaobao Li

Nanjing Forestry University
Nanjing Tech University
University of Akron
Nanjing Institute of Technology

Research output: Contribution to journal › Article › peer-review

45 Citations (SciVal)

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Abstract

Mesoporous TiO2(B) whisker was firstly applied as a support for synthesizing the novel sulfated solid superacid (SO42−/TiO2(B)). According to NH3-TPD, TG and Py-IR characterization results, it was found that the similar amount of sulfate group on TiO2(B) and anatase showed significantly different acid characteristics and catalytic performances. The total acid amount of SO42−/TiO2(B) was about 1.8 times as anatase-supported sulfated solid superacid (SO42−/Anatase). Simultaneously, the SO42−/TiO2(B) possessed higher percentage of Brønsted acid and more weak-medium acid strength than SO42−/Anatase. These acidic properties endowed SO42−/TiO2(B) with the increased esterification reaction rate and decreased alkylation byproduct selectivity compared with that of SO42−/Anatase. Structure-performance analysis exhibited that there were more bridged bidentate sulfate groups coordinated to the TiO2(B) in SO42−/TiO2(B), which could induce more Ti cations than that of the chelating one. This was the key factor to be responsible for the unique acid characteristics of SO42−/TiO2(B). The present work provides a novel solid superacid and might open a strategy to mediate the acid characteristic for sulfated solid superacid.

Original language	English
Pages (from-to)	25-32
Number of pages	8
Journal	Applied Catalysis A: General
Volume	574
Early online date	29 Jan 2019
DOIs	https://doi.org/10.1016/j.apcata.2019.01.025
Publication status	Published - 25 Mar 2019

Bibliographical note

Keywords

Acid properties
Catalysis
Coordination
Sulfated solid superacid
TiO (B)

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10.1016/j.apcata.2019.01.025

Accepted Manuscript
© 2019, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Accepted author manuscript, 710 KBLicence: CC BY-NC-ND 3.0

Cite this

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title = "Novel mesoporous TiO2(B) whisker-supported sulfated solid superacid with unique acid characteristics and catalytic performances",

abstract = "Mesoporous TiO2(B) whisker was firstly applied as a support for synthesizing the novel sulfated solid superacid (SO42−/TiO2(B)). According to NH3-TPD, TG and Py-IR characterization results, it was found that the similar amount of sulfate group on TiO2(B) and anatase showed significantly different acid characteristics and catalytic performances. The total acid amount of SO42−/TiO2(B) was about 1.8 times as anatase-supported sulfated solid superacid (SO42−/Anatase). Simultaneously, the SO42−/TiO2(B) possessed higher percentage of Br{\o}nsted acid and more weak-medium acid strength than SO42−/Anatase. These acidic properties endowed SO42−/TiO2(B) with the increased esterification reaction rate and decreased alkylation byproduct selectivity compared with that of SO42−/Anatase. Structure-performance analysis exhibited that there were more bridged bidentate sulfate groups coordinated to the TiO2(B) in SO42−/TiO2(B), which could induce more Ti cations than that of the chelating one. This was the key factor to be responsible for the unique acid characteristics of SO42−/TiO2(B). The present work provides a novel solid superacid and might open a strategy to mediate the acid characteristic for sulfated solid superacid.",

keywords = "Acid properties, Catalysis, Coordination, Sulfated solid superacid, TiO (B)",

author = "Licheng Li and Haiqin Yue and Tuo Ji and Wei Li and Xuejuan Zhao and Lei Wang and Jie She and Xiaoli Gu and Xiaobao Li",

note = "{\textcopyright} 2019, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/",

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T1 - Novel mesoporous TiO2(B) whisker-supported sulfated solid superacid with unique acid characteristics and catalytic performances

AU - Li, Licheng

AU - Yue, Haiqin

AU - Ji, Tuo

AU - Li, Wei

AU - Zhao, Xuejuan

AU - Wang, Lei

AU - She, Jie

AU - Gu, Xiaoli

AU - Li, Xiaobao

PY - 2019/3/25

Y1 - 2019/3/25

N2 - Mesoporous TiO2(B) whisker was firstly applied as a support for synthesizing the novel sulfated solid superacid (SO42−/TiO2(B)). According to NH3-TPD, TG and Py-IR characterization results, it was found that the similar amount of sulfate group on TiO2(B) and anatase showed significantly different acid characteristics and catalytic performances. The total acid amount of SO42−/TiO2(B) was about 1.8 times as anatase-supported sulfated solid superacid (SO42−/Anatase). Simultaneously, the SO42−/TiO2(B) possessed higher percentage of Brønsted acid and more weak-medium acid strength than SO42−/Anatase. These acidic properties endowed SO42−/TiO2(B) with the increased esterification reaction rate and decreased alkylation byproduct selectivity compared with that of SO42−/Anatase. Structure-performance analysis exhibited that there were more bridged bidentate sulfate groups coordinated to the TiO2(B) in SO42−/TiO2(B), which could induce more Ti cations than that of the chelating one. This was the key factor to be responsible for the unique acid characteristics of SO42−/TiO2(B). The present work provides a novel solid superacid and might open a strategy to mediate the acid characteristic for sulfated solid superacid.

AB - Mesoporous TiO2(B) whisker was firstly applied as a support for synthesizing the novel sulfated solid superacid (SO42−/TiO2(B)). According to NH3-TPD, TG and Py-IR characterization results, it was found that the similar amount of sulfate group on TiO2(B) and anatase showed significantly different acid characteristics and catalytic performances. The total acid amount of SO42−/TiO2(B) was about 1.8 times as anatase-supported sulfated solid superacid (SO42−/Anatase). Simultaneously, the SO42−/TiO2(B) possessed higher percentage of Brønsted acid and more weak-medium acid strength than SO42−/Anatase. These acidic properties endowed SO42−/TiO2(B) with the increased esterification reaction rate and decreased alkylation byproduct selectivity compared with that of SO42−/Anatase. Structure-performance analysis exhibited that there were more bridged bidentate sulfate groups coordinated to the TiO2(B) in SO42−/TiO2(B), which could induce more Ti cations than that of the chelating one. This was the key factor to be responsible for the unique acid characteristics of SO42−/TiO2(B). The present work provides a novel solid superacid and might open a strategy to mediate the acid characteristic for sulfated solid superacid.

KW - Acid properties

KW - Catalysis

KW - Coordination

KW - Sulfated solid superacid

KW - TiO (B)

UR - https://linkinghub.elsevier.com/retrieve/pii/S0926860X19300419

UR - https://www.scopus.com/pages/publications/85060897009

U2 - 10.1016/j.apcata.2019.01.025

DO - 10.1016/j.apcata.2019.01.025

M3 - Article

SN - 0926-860X

VL - 574

SP - 25

EP - 32

JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

ER -

Novel mesoporous TiO2(B) whisker-supported sulfated solid superacid with unique acid characteristics and catalytic performances

Abstract

Bibliographical note

Keywords

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