Iqbal M Abdullah, Ali S Irfan, Amin Faheem, Tariq Ayesha, Iqbal Muhammad Z, Rizwan Syed
Physics Characterization and Simulations Lab, Department of Physics, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan.
Shenzhen Key Laboratory of Advanced Thin Films and Applications, College of Physics and Energy, and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
ACS Omega. 2019 May 17;4(5):8661-8668. doi: 10.1021/acsomega.9b00493. eCollection 2019 May 31.
Over the years, scarcity of fresh potable water has increased the demand for clean water. Meanwhile, with the advent of nanotechnology, the use of nanomaterials for photocatalytic degradation of pollutants in wastewaters has increased. Herein, a new type of nanohybrids of La- and Mn-codoped bismuth ferrite (BFO) nanoparticles embedded into transition-metal carbide sheets (MXene-TiC) were prepared by a low-cost double-solvent sol-gel method and investigated for their catalytic activity in dark and photoinduced conditions. The photoluminescence results showed that pure BFO has the highest electron hole recombination rate as compared to all the codoped BFO/TiC nanohybrids. The higher electron-hole pair generation rate of the nanohybrids provides a suitable environment for fast degradation of organic dye molecules. The band gap of the prepared nanohybrid was tuned to 1.73 eV. Moreover, the BLFO/TiC and BLFMO-5/TiC degraded 92 and 93% of the organic pollutant, respectively, from water in dark and remaining in the light spectrum. Therefore, these synthesized nanohybrids could be a promising candidate for catalytic and photocatalytic applications in future.
多年来，新鲜饮用水的短缺增加了对清洁水的需求。与此同时，随着纳米技术的出现，纳米材料在光催化降解废水中污染物方面的应用有所增加。在此，通过低成本的双溶剂溶胶 - 凝胶法制备了一种新型的镧和锰共掺杂的铋铁氧体（BFO）纳米颗粒嵌入过渡金属碳化物片（MXene - TiC）的纳米杂化物，并研究了它们在黑暗和光诱导条件下的催化活性。光致发光结果表明，与所有共掺杂的BFO/TiC纳米杂化物相比，纯BFO具有最高的电子空穴复合率。纳米杂化物较高的电子 - 空穴对产生速率为有机染料分子的快速降解提供了合适的环境。所制备的纳米杂化物的带隙被调谐至1.73 eV。此外，BLFO/TiC和BLFMO - 5/TiC在黑暗中分别从水中降解了92%和93%的有机污染物，在光谱光照下继续降解。因此，这些合成的纳米杂化物可能是未来催化和光催化应用的有前途的候选材料。
