Bahadur Ali, Iqbal Shahid, Javed Mohsin, Hassan Syeda Saba, Nadeem Sohail, Akbar Ali, Alzhrani Rami M, Al-Anazy Murefah Mana, Elkaeed Eslam B, Awwad Nasser S, Ibrahium Hala A, Mohyuddin Ayesha
Department of Chemistry, College of Science and Technology, Wenzhou-Kean University Wenzhou China.
Department of Chemistry, School of Natural Sciences (SNS), National University of Science and Technology (NUST) H-12 Islamabad 46000 Pakistan
RSC Adv. 2022 Aug 16;12(36):23263-23273. doi: 10.1039/d1ra08525e.
A step-scheme (S-scheme) photocatalyst made of sulfurized graphitic carbon nitride/cobalt doped zinc ferrite (S-g-CN/Co-ZF) was constructed using a hydrothermal process because the building of S-scheme systems might increase the lifespan of highly reactive charge carriers. Utilizing cutting-edge methods, the hybrid photocatalyst was evaluated by employing TEM, XPS, XRD, BET, FTIR, transient photo-response, UV-vis, EIS and ESR signals. In order to create a variety of binary nanocomposites (NCs), nanoparticles (NPs) of 6% cobalt doped zinc ferrite (Co-ZF) were mixed with S-g-CN at various concentrations, ranging from 10 to 80 wt%. For photocatalytic dye removal, a particular binary NC constructed between S-g-CN and Co-ZF produces a huge amount of catalytic active sites. The findings showed that loading of S-g-CN on 6% Co-ZF NPs serves as a good heterointerface for e/h separation and transportation through the S-scheme S-g-CN/Co-ZF heterojunction. By boosting the hybrid system's BET surface area for the photocatalytic process, the addition of 6% Co-ZF improves the system's ability to absorb more sunlight and boosts its photocatalytic activity. The highest photo-removal effectiveness (98%), which is around 2.45 times higher than that of its competitors, was achieved by the hybrid photocatalyst system with an ideal loading of 48% Co-ZF. Furthermore, the trapping studies showed that the primary species involved in the MB aqueous photo-degradation were ˙OH and h.
采用水热法构建了一种由硫化石墨相氮化碳/钴掺杂铁酸锌（S-g-CN/Co-ZF）制成的阶梯式（S-型）光催化剂，因为构建S-型体系可能会延长高活性电荷载流子的寿命。利用前沿方法，通过透射电子显微镜（TEM）、X射线光电子能谱（XPS）、X射线衍射（XRD）、比表面积分析仪（BET）、傅里叶变换红外光谱（FTIR）、瞬态光响应、紫外可见光谱（UV-vis）、电化学阻抗谱（EIS）和电子自旋共振（ESR）信号对该复合光催化剂进行了评估。为了制备多种二元纳米复合材料（NCs），将6%钴掺杂铁酸锌（Co-ZF）的纳米颗粒（NPs）与不同浓度（10至80 wt%）的S-g-CN混合。对于光催化染料去除，在S-g-CN和Co-ZF之间构建的特定二元NC产生了大量催化活性位点。研究结果表明，在6% Co-ZF NPs上负载S-g-CN可作为电子/空穴分离和通过S-型S-g-CN/Co-ZF异质结传输的良好异质界面。通过增加复合体系在光催化过程中的比表面积，添加6% Co-ZF提高了体系吸收更多太阳光的能力并增强了其光催化活性。具有48% Co-ZF理想负载量的复合光催化剂体系实现了最高的光去除效率（98%），约为其竞争对手的2.45倍。此外，捕获研究表明，参与甲基橙水溶液光降解的主要物种是˙OH和h。
