Zinc cadmium sulphide-based photoreforming of biomass-based monosaccharides to lactic acid and efficient hydrogen production

IF 9.4 1区 化学 Q1 CHEMISTRY, PHYSICAL
Ermiao Liang , Ke Cheng , Xue Liu , Mingcong Xu , Sha Luo , Chunhui Ma , Zhijun Chen , Yahui Zhang , Shouxin Liu , Wei Li
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Abstract

Approaches that add value to biomass through the use of photoreforming reactions offer great opportunities for the efficient use of renewable resources. Here, we constructed a novel zinc cadmium sulphide/molybdenum dioxide-molybdenum carbide–carbon (ZnxCd1-xS-y/MoO2-Mo2C-C) heterojunction which was applied to photoreforming of biomass-based monosaccharides for hydrogen and lactic acid production. Bandgap engineering effectively modulated the redox capacity of ZnxCd1-xS-y and exposed more (101) crystalline surfaces, which improved the lactic acid selectivity. The MoO2-Mo2C-C (MC) co-catalysts had unique microstructures that increased the light absorption range and the number of active sites of ZnxCd1-xS-y. These features effectively promoted the separation and migration of photogenerated carriers, which in turn enhanced the photoreforming activity. The optimised Zn0.4Cd0.6S-0/MC composites exhibited superior photocatalytic activity with a hydrogen yield of 12.2 mmol/g/h. Conversion of biomass-based monosaccharides was approximately 100 %, where arabinose had the greatest lactic acid selectivity (64.1 %). Active species, including h+, ⋅O2, ⋅OH, and 1O2, all favoured lactic acid production, where ⋅O2 played a major role in the conversion. This study demonstrates that rational design of photocatalysts can achieve the selective conversion of biomass into high value-added chemicals as well as the generation of clean energy.

Abstract Image

生物质单糖光转化制乳酸及高效制氢研究。
通过使用光重整反应来增加生物质价值的方法为有效利用可再生资源提供了巨大的机会。本文构建了一种新型的硫化锌镉/二氧化钼-碳化钼-碳(ZnxCd1-xS-y/MoO2-Mo2C-C)异质结,用于生物质单糖的光重整制氢和乳酸。带隙工程有效地调节了ZnxCd1-xS-y的氧化还原能力,暴露了更多的(101)晶体表面,提高了乳酸选择性。MoO2-Mo2C-C (MC)共催化剂具有独特的微观结构,增加了ZnxCd1-xS-y的光吸收范围和活性位点数量。这些特性有效地促进了光生载流子的分离和迁移,从而提高了光重整活性。优化后的Zn0.4Cd0.6S-0/MC复合材料具有良好的光催化活性,产氢率为12.2 mmol/g/h。生物质基单糖的转化率约为100%,其中木糖具有最大的乳酸选择性(64.1%)。活性物质h+、⋅O2-、⋅OH和1O2均有利于乳酸生成,其中⋅O2-在转化过程中起主要作用。该研究表明,合理设计光催化剂可以实现生物质选择性转化为高附加值化学品,并产生清洁能源。
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来源期刊
CiteScore
16.10
自引率
7.10%
发文量
2568
审稿时长
2 months
期刊介绍: The Journal of Colloid and Interface Science publishes original research findings on the fundamental principles of colloid and interface science, as well as innovative applications in various fields. The criteria for publication include impact, quality, novelty, and originality. Emphasis: The journal emphasizes fundamental scientific innovation within the following categories: A.Colloidal Materials and Nanomaterials B.Soft Colloidal and Self-Assembly Systems C.Adsorption, Catalysis, and Electrochemistry D.Interfacial Processes, Capillarity, and Wetting E.Biomaterials and Nanomedicine F.Energy Conversion and Storage, and Environmental Technologies
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