Alothman Asma A, Khan Mohammad Rizwan, Albaqami Munirah D, Mohandoss Sonaimuthu, Alothman Zeid A, Ahmad Naushad, Alqahtani Khadraa N
Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.
School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea.
Nanomaterials (Basel). 2023 Nov 27;13(23):3026. doi: 10.3390/nano13233026.
TiC-MXene material, known for its strong electronic conductivity and optical properties, has emerged as a promising alternative to noble metals as a cocatalyst for the development of efficient photocatalysts used in environmental cleanup. In this study, we investigated the photodegradation of crystal-violet (CV) dye when exposed to UV light using a newly developed photocatalyst known as TiC-MXene/NiO nanocomposite-decorated CsPbI perovskite, which was synthesized through a hydrothermal method. Our research investigation into the structural, morphological, and optical characteristics of the TiC-MXene/NiO/CsPbI composite using techniques such as FTIR, XRD, TEM, SEM-EDS mapping, XPS, UV-Vis, and PL spectroscopy. The photocatalytic efficacy of the TiC-MXene/NiO/CsPbI composite was assessed by evaluating its ability to degrade CV dye in an aqueous solution under UV-light irradiation. Remarkably, the TiC-MXene/NiO/CsPbI composite displayed a significant improvement in both the degradation rate and stability of CV dye when compared to the TiC-MXene/NiO nanocomposite and CsPbI perovskite materials. Furthermore, the UV-visible absorption spectrum of the TiC-MXene/NiO/CsPbI composite demonstrated a reduced band gap of 2.41 eV, which is lower than that of TiC-MXene/NiO (3.10 eV) and TiC-MXene (1.60 eV). In practical terms, the TiC-MXene/NiO/CsPbI composite achieved an impressive 92.8% degradation of CV dye within 90 min of UV light exposure. We also confirmed the significant role of photogenerated holes and radicals in the CV dye removal process through radical scavenger trapping experiments. Based on our findings, we proposed a plausible photocatalytic mechanism for the TiC-MXene/NiO/CsPbI composite. This research may open up new avenues for the development of cost-effective and high-performance MXene-based perovskite photocatalysts, utilizing abundant and sustainable materials for environmental remediation.
TiC-MXene材料以其强大的导电性和光学性能而闻名，作为一种用于开发环境净化高效光催化剂的助催化剂，已成为贵金属的一种有前途的替代品。在本研究中，我们使用一种新开发的光催化剂——TiC-MXene/NiO纳米复合材料修饰的CsPbI钙钛矿，通过水热法合成，研究了其在紫外光照射下对结晶紫（CV）染料的光降解情况。我们使用FTIR、XRD、TEM、SEM-EDS映射、XPS、UV-Vis和PL光谱等技术，对TiC-MXene/NiO/CsPbI复合材料的结构、形态和光学特性进行了研究。通过评估TiC-MXene/NiO/CsPbI复合材料在紫外光照射下在水溶液中降解CV染料的能力，来评估其光催化效果。值得注意的是，与TiC-MXene/NiO纳米复合材料和CsPbI钙钛矿材料相比，TiC-MXene/NiO/CsPbI复合材料在CV染料的降解速率和稳定性方面都有显著提高。此外，TiC-MXene/NiO/CsPbI复合材料的紫外可见吸收光谱显示其带隙降低至2.41 eV，低于TiC-MXene/NiO（3.10 eV）和TiC-MXene（1.60 eV）。实际上，TiC-MXene/NiO/CsPbI复合材料在紫外光照射90分钟内实现了令人印象深刻的92.8%的CV染料降解率。我们还通过自由基清除剂捕获实验证实了光生空穴和自由基在CV染料去除过程中的重要作用。基于我们的研究结果，我们提出了一种合理的TiC-MXene/NiO/CsPbI复合材料光催化机理。这项研究可能为开发具有成本效益和高性能的基于MXene的钙钛矿光催化剂开辟新途径，利用丰富且可持续的材料进行环境修复。
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