Enhanced aqueous photocatalytic selective oxidation of HMF using simulated sunlight: Comparison of the performance of different photocatalysts

IF 8.6 2区工程技术 Q1 ENERGY & FUELS Sustainable Materials and Technologies Pub Date : 2024-11-20 DOI:10.1016/j.susmat.2024.e01188

Muhammad Umair, Claudio Maria Pecoraro, Francesco Di Franco, Monica Santamaria, Leonardo Palmisano, Vittorio Loddo, Marianna Bellardita

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Abstract

Selective conversion of biomass derivatives to high values added (HVA) compounds is an effective and sustainable route to fulfil the industrial request of chemicals. In this paper the partial oxidation of the lignocellulose derivative 5-hydroxymethyl-2-furfural (HMF) to high value compounds in green conditions has been investigated by using various photocatalysts and irradiation sources. In particular, TiO₂ based and alternative photocatalysts (Bi₂O₃, Cu₂O, C₃N₄, ZnIn₂S₄) were chosen with the aim of not only increasing the activity but also the selectivity in the partial oxidation of HMF. Bare ZnIn₂S₄, prepared in a simple way, showed to be the best photocatalyst under simulated sunlight illumination with conversion of HMF and selectivity towards 2,5-diformylfuran equal to 43 % and 68 %, respectively. Electrochemical measurements and experimental runs in the presence of various scavengers (tert-butanol, AgNO₃, benzoquinone, Na₂C₂O₄) revealed that e⁻ and O₂⁻ radicals play a key role in the selective conversion of HMF. A kinetic study was performed, and some kinetic parameters were determined by using the Langmuir-Hinshelwood model.

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利用模拟阳光增强水基光催化选择性氧化 HMF：不同光催化剂的性能比较

选择性地将生物质衍生物转化为高附加值（HVA）化合物是满足工业化学品需求的一条有效且可持续的途径。本文通过使用各种光催化剂和辐照源，研究了在绿色条件下将木质纤维素衍生物 5-hydroxymethyl-2-furfural (HMF) 部分氧化为高附加值化合物的过程。特别是选择了基于 TiO2 的光催化剂和替代光催化剂（Bi2O3、Cu2O、C3N4、ZnIn2S4），目的不仅是为了提高 HMF 部分氧化的活性，而且是为了提高其选择性。用简单方法制备的裸 ZnIn2S4 在模拟阳光照射下显示出最好的光催化剂性能，其 HMF 转化率和对 2,5-二甲酰基呋喃的选择性分别为 43% 和 68%。在各种清除剂（叔丁醇、AgNO3、苯醌、Na2C2O4）存在下进行的电化学测量和实验表明，e-和 O2- 自由基在 HMF 的选择性转化中起着关键作用。研究人员进行了动力学研究，并利用 Langmuir-Hinshelwood 模型确定了一些动力学参数。

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来源期刊

Sustainable Materials and Technologies Energy-Renewable Energy, Sustainability and the Environment

CiteScore

13.40

自引率

4.20%

发文量

158

审稿时长

45 days

期刊介绍： Sustainable Materials and Technologies (SM&T), an international, cross-disciplinary, fully open access journal published by Elsevier, focuses on original full-length research articles and reviews. It covers applied or fundamental science of nano-, micro-, meso-, and macro-scale aspects of materials and technologies for sustainable development. SM&T gives special attention to contributions that bridge the knowledge gap between materials and system designs.