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Yuanyuan Li, Sujun Guan, Yingda Qian, Liang Hao, Sheikh Mohamed Mohamed, Lijun Wang, Takaomi Itoi, Yun Lu, and Xinwei Zhao, Enhanced visible light response and cytocompatibility of TiO2–TiC shell–core structured S-scheme photocatalyst, Int. J. Miner. Metall. Mater., 33(2026), No. 3, pp.999-1011. https://doi.org/10.1007/s12613-025-3304-6
Yuanyuan Li, Sujun Guan, Yingda Qian, Liang Hao, Sheikh Mohamed Mohamed, Lijun Wang, Takaomi Itoi, Yun Lu, and Xinwei Zhao, Enhanced visible light response and cytocompatibility of TiO2–TiC shell–core structured S-scheme photocatalyst, Int. J. Miner. Metall. Mater., 33(2026), No. 3, pp.999-1011. https://doi.org/10.1007/s12613-025-3304-6
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基于TiO2–TiC壳–核结构S型异质结增强纳米颗粒的可见光响应及其光催化活性与细胞相容性

摘要: 为增强二氧化钛（TiO2）的可见光响应性能，本研究采用碳粉对碳化钛（TiC）纳米颗粒进行包埋式热处理，有效解决了传统掺杂方法存在的技术难题。包埋式热处理过程中，TiC纳米颗粒表面原位生成富含氧空位的 TiO2薄壳层，形成核-壳结构的S型异质结光催化剂。透射电子显微镜（TEM）和紫外–可见吸收光谱（UV–vis）的表征结果证实了 TiO2薄壳层的成功构筑。通过调控壳层厚度，所制备的 TiO2–TiC 核–壳结构材料在最优壳核配比时，展现出非常优异的可见光吸收性能（吸收波长范围 400–800 nm）；样品cHT500对罗丹明 B（RhB）的降解速率达 0.0687 min−1，是纯 TiO2材料（0.0033 min−1）可见光催化降解速率的 20.8 倍。此外，细胞相容性测试结果表明，样品cHT500具有良好的细胞存活率，达到与 TiO2纳米颗粒相当的水平，显著改善了TiC的细胞相容性的缺陷。综上，所制备的 TiO2–TiC 核–壳纳米颗粒兼具优异的可见光催化活性和良好的细胞相容性，在生物医学和光催化领域具有广阔的应用前景。

 

Enhanced visible light response and cytocompatibility of TiO2–TiC shell–core structured S-scheme photocatalyst

Abstract: To enhance the visible light response of titanium dioxide (TiO2), titanium carbide (TiC) nanoparticles (NPs) were thermally treated in carbon powder, effectively overcoming the challenges associated with conventional doping methods. During the treatment, a TiO2 thin shell with oxygen vacancies (OVs) formed around the TiC NPs, creating a shell–core structure S-scheme photocatalyst. Transmission electron microscopy (TEM) and ultraviolet–visible (UV–vis) spectroscopy confirmed the successful formation of the TiO2 shell. By optimizing the shell thickness, the TiO2–TiC shell–core structure achieved an ideal shell–core ratio, resulting in strong visible light absorption (400–800 nm), and the degradation rate constant of Rhodamine B (RhB) of sample cHT500 reached 0.0687 min−1, which is 20.8 times higher than that of pristine TiO2 (0.0033 min−1) under visible-light irradiation. In addition, cytocompatibility tests showed that sample cHT500 exhibits favorable cell viability, which is comparable to that of TiO2 nanoparticles, and thus remarkably mitigates the poor biocompatibility inherent to TiC, making them promising candidates for biomedical and photocatalytic applications.

 

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