Transforming temperature effects on TiO2/iron oxide composite derived from copper slag as a photocatalyst for glucose conversion

IF 8.6 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies Pub Date : 2024-09-27 DOI:10.1016/j.susmat.2024.e01129

Jirawat Trakulmututa , Chitiphon Chuaicham , Assadawoot Srikhaow , Keiko Sasaki

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Abstract

Amorphous copper slag (CS), a by-product of the matte smelting and refining processes in copper smelting, contains approximately 47 % iron. This study explores the potential of using CS as an iron source to create a photocatalyst composite with TiO₂ through calcination at various temperatures (550, 700, 850, and 1000 °C) in order to achieve efficient photocatalytic conversion of glucose to lactic acid under visible light irradiation (λ ≥ 380 nm) at room temperature. All the calcined composites exhibited superior glucose conversion and lactic acid production compared to the uncalcined composite (CT) and pure TiO₂. The composite calcined at 700 °C provided the highest yield and selectivity for lactic acid. This improvement is attributed to the optimal ratio of Ti^(III)/Ti^(IV) and the effective separation of photogenerated electron-hole pairs via the Z-scheme heterojunction in the calcined CT composite. This process contributes to the circular economy by recycling waste materials to produce higher-value-added chemicals from biomass using sustainable energy sources.

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铜渣衍生的 TiO2/氧化铁复合材料作为葡萄糖转化光催化剂的转化温度效应

无定形铜渣（CS）是铜冶炼过程中锍熔炼和精炼的副产品，含铁量约为 47%。本研究探讨了利用 CS 作为铁源，通过不同温度（550、700、850 和 1000 °C）的煅烧与 TiO2 制成光催化剂复合材料的潜力，以便在室温可见光照射（λ ≥ 380 nm）下实现葡萄糖到乳酸的高效光催化转化。与未煅烧的复合材料（CT）和纯 TiO2 相比，所有煅烧过的复合材料都表现出更高的葡萄糖转化率和乳酸产量。在 700 °C 煅烧的复合材料的乳酸产量和选择性最高。这一改进归功于 Ti（III）/Ti（IV）的最佳比例，以及通过煅烧 CT 复合材料中的 Z 型异质结有效分离光生电子-空穴对。该工艺通过回收废料，利用可持续能源从生物质中生产出高附加值的化学品，为循环经济做出了贡献。

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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.