Flash sintering enhanced co-doping TiO2 with Fe and Cu to improve photocatalytic efficiency

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2024-10-01 DOI:10.1016/j.jeurceramsoc.2024.116960

Anupam Raj , Adit Thampi , Bhavesh N. Socha , Shikhar Krishn Jha

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Abstract

Nanoparticles of TiO₂ doped with a transition metal are known to be effective photocatalysts. Fe and Cu co-doping in TiO₂ using flash sintering and its enhanced photodegradation efficiency for methylene blue (MB) are discussed here. The properties of synthesized material have been evaluated using various characterization techniques, including XRD, TEM, SEM, BET, XPS, FT-IR, and UV–visible spectroscopy. The XRD confirmed complete co-doping by using flash sintering, which was also corroborated by TEM. XPS analysis showed that the flash sintered catalyst had more defects like Ti³⁺ and oxygen vacancies than the conventionally sintered catalyst. UV-Vis spectroscopy and dye degradation experiments showed that co-doping in TiO₂ with Fe and Cu narrowed the band gap, which in turn boosted its visible light sensitivity by enhancing the trapping rate of photogenerated electrons and holes. Tested on MB, flash sintered co-doped TiO₂ showed a higher degradation efficiency under the visible range of LED white light.

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闪速烧结增强 TiO2 与 Fe 和 Cu 的共掺杂以提高光催化效率

众所周知，掺杂过渡金属的二氧化钛纳米颗粒是一种有效的光催化剂。本文讨论了利用闪速烧结法在二氧化钛中共同掺杂铁和铜及其对亚甲基蓝（MB）光降解效率的提高。利用各种表征技术，包括 XRD、TEM、SEM、BET、XPS、傅立叶变换红外光谱和紫外可见光谱，对合成材料的性能进行了评估。XRD 证实了通过闪速烧结实现的完全共掺杂，TEM 也证实了这一点。XPS 分析表明，与传统烧结催化剂相比，闪速烧结催化剂具有更多的 Ti3+ 和氧空位等缺陷。紫外可见光谱和染料降解实验表明，TiO2 中铁和铜的共掺杂缩小了带隙，进而通过提高光生电子和空穴的捕获率提高了其可见光灵敏度。在甲基溴的测试中，闪蒸烧结的共掺杂 TiO2 在 LED 白光的可见光范围内显示出更高的降解效率。

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.