Unveiling the influence of Fe2O3 nanoparticles on CuxO-TiO2(B) nanofibers for dual Z-scheme electron transfer visible light photocatalysts: investigation on local atomic structures and electronic properties
Unveiling the influence of Fe2O3 nanoparticles on CuxO-TiO2(B) nanofibers for dual Z-scheme electron transfer visible light photocatalysts: investigation on local atomic structures and electronic properties
复制标题
揭示 Fe2O3 纳米粒子对 CuxO-TiO2(B) 纳米纤维对双 Z 型电子转移可见光光催化剂的影响：局部原子结构和电子特性的研究
DOI：
10.1039/d3en00038a
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发表时间：
2023
期刊：
影响因子：
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通讯作者：
Sekar Karthikeyan
中科院分区：
文献类型：
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作者：
Preeyanghaa Mani;Chuaicham Chitiphon;Shenoy Sulakshana;Vellaichamy Balakumar;Li Wei;Manokaran Kamaraj;Varathan Elumalai;Neppolian Bernaurdshaw;Ohtani Bunsho;Sasaki Keiko;Sekar Karthikeyan
虽然太阳能制氢和难降解污染物是很有吸引力的技术，但大多数反应的光催化效率受到可见光收集能力不足和电荷转移途径限制的限制。为了解决这些障碍，我们通过原位光沉积策略设计了新型光催化剂Fe2O3/CuxO/TiO2(B)纳米纤维（即CFTNF-y）。研究了CuxO纳米颗粒浓度对TiO2(B)纳米纤维（CTNF-x）的影响，并将优化后的催化剂与其他化学还原策略合成的催化剂（CTNF-x (NS)）进行了比较。通过HAADF-STEM、元素映射、XRF、XPS、XANES和EXAFS结果证实，CFTNF-y纳米复合材料中TiO2(B)纳米纤维（TNF）表面形成了Fe2O3/CuxO纳米颗粒。在紫外-可见光照射下，CFTNF-y纳米复合材料的光催化产氢活性显著增强，为65.82 μmol g−1 h−1，是原始TNF的12倍。此外，CFTNF-y纳米复合材料的光催化甲氧苄啶（TMP，一种典型的抗生素污染物）去除率为0.1 mM g−1 min−1。这些优异的光催化性能可归因于TNF表面均匀分布的尺寸可控的Fe2O3/CuxO纳米颗粒，在可见区提高的光收集能力以及通过界面电场介导的双z方案异质结实现的显着的电荷载流子分离/转移速率。这一论断得到了形态学分析、RDB-PAS的ERDT/CBB、自由基捕获实验和光电化学研究的支持。此外，基于LC-MS/MS分析，提出了cftnf纳米复合材料的TMP光降解途径。本工作强调了一种开发具有界面电荷转移的双z型光催化剂的新方法，以实现高效的光催化性能。
Although solar-driven hydrogen production and recalcitrant pollutant degradation are appealing technologies, the photocatalytic efficiency for most reactions is limited by insufficient visible-light harvesting ability and restricted charge transfer pathways. To tackle these obstacles, we designed novel photocatalyst Fe2O3/CuxO/TiO2(B) nanofibers (namely, CFTNF-y) via an in situ photodeposition strategy. The effects of the CuxO nanoparticle concentration on TiO2(B) nanofibers (CTNF-x) were investigated, and the optimized catalyst was compared to other synthesized catalysts via a chemical reduction strategy (CTNF-x (NS)). The formation of Fe2O3/CuxO nanoparticles on the TiO2(B) nanofiber (TNF) surface in CFTNF-y nanocomposites was confirmed by HAADF-STEM, elemental mapping, XRF, XPS, XANES and EXAFS results. The CFTNF-y nanocomposites demonstrated a significantly enhanced photocatalytic hydrogen production activity of 65.82 μmol g−1 h−1 under UV-visible light irradiation, which was 12-fold higher than that of pristine TNF. Moreover, the CFTNF-y nanocomposites exhibited a photocatalytic trimethoprim (TMP, a model antibiotic contaminant) removal rate of 0.1 mM g−1 min−1. These excellent photocatalytic performances can be attributed to the uniform distribution of size-controlled Fe2O3/CuxO nanoparticles on the TNF surface, improved light-harvesting ability in the visible region and a remarkable charge carrier separation/transfer rate realized via a dual-Z-scheme heterojunction mediated by an interfacial electric field. This assertion is supported by morphology analysis, ERDT/CBB by RDB-PAS, radical trapping experiments, and photoelectrochemical studies. Moreover, a plausible TMP photodegradation pathway over CFTNF-y nanocomposites is proposed based on LC-MS/MS analysis. The present work highlights a novel approach for the development of a dual-Z-scheme photocatalyst with interfacial charge transfer for achieving efficient photocatalytic performance.