Qamar M Tariq, Iqbal Shahid, Aslam M, Alhujaily Ahmad, Bilal Anum, Rizwan Komal, Farooq Hafiz Muhammad Umer, Sheikh Tahir Ali, Bahadur Ali, Awwad Nasser S, Ibrahium Hala A, Almufarij Rasmiah S, Elkaeed Eslam B
Department of Chemistry, Forman Christian College (A Chartered University), Lahore, Pakistan.
Department of Chemistry, School of Natural Sciences (SNS), National University of Science and Technology (NUST), Islamabad, Pakistan.
Front Chem. 2023 Apr 19;11:1126171. doi: 10.3389/fchem.2023.1126171. eCollection 2023.
Besides natural sunlight and expensive artificial lights, economical indoor white light can play a significant role in activating a catalyst for photocatalytic removal of organic toxins from contaminated water. In the current effort, CeO has been modified with Ni, Cu, and Fe through doping methodology to study the removal of 2-chlorophenol (2-CP) in the illumination of 70 W indoor LED white light. The absence of additional diffractions due to the dopants and few changes such as reduction in peaks' height, minor peak shift at 2θ (28.525°) and peaks' broadening in XRD patterns of modified CeO verifies the successful doping of CeO. The solid-state absorption spectra revealed higher absorbance of Cu-doped CeO whereas a lower absorption response was observed for Ni-doped CeO. An interesting observation regarding the lowering of indirect bandgap energy of Fe-doped CeO (∼2.7 eV) and an increase in Ni-doped CeO (∼3.0 eV) in comparison to pristine CeO (∼2.9 eV) was noticed. The process of - recombination in the synthesized photocatalysts was also investigated through photoluminescence spectroscopy. The photocatalytic studies revealed the greater photocatalytic activity of Fe-doped CeO with a higher rate (∼3.9 × 10 min) among all other materials. Moreover, kinetic studies also revealed the validation of the Langmuir-Hinshelwood kinetic model (R = 0.9839) while removing 2-CP in the exposure of indoor light with a Fe-doped CeO photocatalyst. The XPS analysis revealed the existence of Fe, Cu and Ni core levels in doped CeO. Using the agar well-diffusion method, the antifungal activity was assessed against the fungus and . Compared to CeO, Ni-doped CeO, and Cu-doped CeO nanoparticles, the Fe-doped CeO nanoparticles have outstanding antifungal properties.
除了自然阳光和昂贵的人造光之外，经济实惠的室内白光在激活用于光催化去除受污染水中有机毒素的催化剂方面可以发挥重要作用。在当前的研究中，通过掺杂方法用镍、铜和铁对二氧化铈进行了改性，以研究在70瓦室内LED白光照射下2-氯苯酚（2-CP）的去除情况。改性二氧化铈的X射线衍射图谱中由于掺杂剂而没有额外的衍射峰，并且峰高降低、2θ（28.525°）处有轻微峰位移以及峰展宽等少量变化，证实了二氧化铈的成功掺杂。固态吸收光谱显示，铜掺杂二氧化铈具有更高的吸光度，而镍掺杂二氧化铈的吸收响应较低。与原始二氧化铈（约2.9电子伏特）相比，观察到一个有趣的现象，即铁掺杂二氧化铈的间接带隙能量降低（约2.7电子伏特），而镍掺杂二氧化铈的间接带隙能量增加（约3.0电子伏特）。还通过光致发光光谱研究了合成光催化剂中的 - 复合过程。光催化研究表明，在所有其他材料中，铁掺杂二氧化铈具有更高的光催化活性，速率更高（约3.9×10分钟）。此外，动力学研究还表明，在用铁掺杂二氧化铈光催化剂去除室内光照射下的2-CP时，朗缪尔 - 欣谢尔伍德动力学模型有效（R = 0.9839）。X射线光电子能谱分析表明，掺杂二氧化铈中存在铁、铜和镍的核心能级。使用琼脂扩散法评估了对 和 真菌的抗真菌活性。与二氧化铈、镍掺杂二氧化铈和铜掺杂二氧化铈纳米颗粒相比，铁掺杂二氧化铈纳米颗粒具有出色的抗真菌性能。
