电子-空穴对的有效分离在优化跨不同催化和光电系统的光生载流子功能方面仍然至关重要。这项研究提出了一种新型的中空直接Z-方案光催化剂的制造,ZnO/TiO2。全面的分析包括各种技术,如紫外可见光谱(UV-Vis),X射线衍射(XRD)透射电子显微镜(TEM),傅里叶变换红外光谱(FT-IR),热重分析(TGA),和能量色散X射线光谱(EDX)为ZnO/TiO2异质结催化剂的复杂材料特性提供了详细的见解。研究结果表明,锐钛矿型TiO2和纤锌矿型ZnO相共存,每个都在纳米复合材料(NC)结构中保留不同的属性。研究表明,在紫外光照射下,ZnO/TiO2-NCs分解亚甲基蓝和吖啶橙的光催化效果。与它们的潜在结构相关。这些染料的降解增强是由于在ZnO和TiO2之间建立了直接的Z方案异质结。使用量子ESPRESSO采用密度泛函理论(DFT),本研究分析了相图和能带结构,阐明电子性质和结构相关性。该研究表征了ZnO/TiO2复合材料,通过紫外可见光谱显示3.1-3.3eV的带隙,并通过XRD分析确认其形成没有杂质相。TEM和EDX显示出均匀的元素分散(Zn:27%,Ti:29.62%,C:5.03%,O:38.35%)。使用DFT的计算分析表明稳定相随着温度的升高而减少。观察到增强的染料降解(MB:88.9%,AO:84%),除了显著的抗菌活性。我们预测,未来的研究将集中在通过表面改性扩大生产和光催化活性的发展上,同时揭示了在水处理和抗菌应用中多功能使用的机械见解和环境适用性,导致该领域的进一步发展。
Efficient separation of electron-hole pairs remains pivotal in optimizing photogenerated carrier functionality across diverse catalytic and optoelectronic systems. This
study presents the fabrication of a novel hollow direct Z-scheme photocatalyst, ZnO/TiO2. A thorough analysis encompassing various techniques such as Ultraviolet-Visible Spectroscopy (UV-Vis), X-ray Diffraction (XRD), Transmission electron Microscopy (TEM), Fourier Transform Infrared Spectroscopy (FT-IR), Thermogravimetric Analysis (TGA), and Energy-Dispersive X-ray Spectroscopy (EDX) provided detailed insights into the complex material characteristics of the ZnO/TiO2 heterojunction catalyst. The findings revealed coexisting anatase TiO2 and wurtzite ZnO phases, each retaining distinct attributes within the nanocomposites (NCs) structure. The
study showcased the photocatalytic efficacy of ZnO/TiO2-NCs in decomposing Methylene Blue and Acridine Orange under UV irradiation, correlated with their underlying structures. Enhanced degradation of these dyes resulted from the establishment of a direct Z-scheme heterojunction between ZnO and TiO2. Employing Density Functional Theory (DFT) using Quantum ESPRESSO, this research analyzed phase diagrams and band structures, elucidating electronic properties and structural correlations. The
study characterized a ZnO/TiO2 composite, revealing a band gap of 3.1-3.3 eV through UV-Visible spectroscopy and confirming its formation without impurity phases via XRD analysis. TEM and EDX showed uniform element dispersion (Zn: 27%, Ti: 29.62%, C: 5.03%, O: 38.35%). Computational analysis using DFT indicated a reduction in stable phases with increasing temperature. Enhanced dye degradation was observed (MB: 88.9%, AO: 84%), alongside significant antibacterial activity. In the future we predict that research will focus on development of scaled up production and photocatalytic activity through surface modification, while unveiling mechanistic insights and environmental applicability for multifunctional use in water treatment and antibacterial applications, leading to further advancement of the field.