Kulkarni Shirin P, Magdum Vikas V, Chitare Yogesh M, Malavekar Dhanaji B, Kim Jin H, Alshehri Sultan, Gunjakar Jayavant L, Patole Shashikant P
Centre for Interdisciplinary Research, D. Y. Patil Education Society (Deemed to Be University), Kolhapur, 416 006, MS, India.
Optoelectronic Convergence Research Centre, Department of Materials Science and Engineering, Chonnam National University, Gwangju, 61186, South Korea.
Heliyon. 2024 Oct 10;10(20):e39235. doi: 10.1016/j.heliyon.2024.e39235. eCollection 2024 Oct 30.
Metal oxide semiconductors are highly promising due to their excellent photocatalytic performance in the photodegradation of industrial waste containing refractory chemical compounds. A hybrid structure with other semiconductors provides improved photocatalytic performance. In this work, porous and two-dimensional (2D) hexaniobate-bismuth vanadate (Nb-BiVO) Z-scheme hybrid photocatalysts are synthesized by chemical solution growth (CSG) of BiVO over electrophoretically deposited Nb thin films. The structural and morphological analysis of Nb-BiVO hybrid thin films evidenced the well-crystalline uniform growth of monoclinic scheelite BiVO over lamellar Nb nanosheets. The Nb-BiVO hybrid thin films exhibit a highly porous randomly aggregated nanosheet network, creating the house-of-cards type morphology. The Nb-BiVO hybrid thin films display a strong visible light absorption with band gap energy of 2.29 eV and highly quenched photoluminescence signal, indicating their visible light harvesting nature and intimate electronic coupling between hybridized species beneficial for photocatalytic applications. The visible-light-driven photodegradation performance of methylene blue (MB), rhodamine-B (Rh-B) dyes, and tetracycline hydrochloride (TC) antibiotic over Nb-BiVO hybrid are studied. The best optimized Nb-BiVO thin film shows superior photocatalytic activity for photodegradation of MB, Rh-B dyes, and TC antibiotic with photodegradation rates of 87.3, 92.8, and 64.7 %, respectively, exceptionally higher than that of pristine BiVO. Furthermore, the mineralization study of Nb-BiVO thin film is conducted using chemical oxygen demand (COD) analysis. The optimized Nb-BiVO thin film shows superior percentage COD removal of 83.33, 85.42, and 61.36 % for MB, Rh-B dyes and TC antibiotic, respectively. The present results highlight the expediency of hybridization in enhancing the photocatalytic activity of pristine BiVO by minimizing its charge recombination rate and improving chemical stability.
金属氧化物半导体因其在含有难降解化合物的工业废料光降解中具有优异的光催化性能而极具前景。与其他半导体的混合结构可提高光催化性能。在本工作中，通过在电泳沉积的Nb薄膜上化学溶液生长（CSG）BiVO，合成了多孔二维（2D）六铌酸盐-钒酸铋（Nb-BiVO）Z型混合光催化剂。Nb-BiVO混合薄膜的结构和形态分析表明，单斜白钨矿BiVO在层状Nb纳米片上生长良好且结晶均匀。Nb-BiVO混合薄膜呈现出高度多孔的随机聚集纳米片网络，形成了纸牌屋型形态。Nb-BiVO混合薄膜显示出强烈的可见光吸收，带隙能量为2.29 eV，光致发光信号高度猝灭，表明其具有可见光捕获特性以及杂交物种之间紧密的电子耦合，有利于光催化应用。研究了Nb-BiVO混合物对亚甲基蓝（MB）、罗丹明B（Rh-B）染料和盐酸四环素（TC）抗生素的可见光驱动光降解性能。最佳优化的Nb-BiVO薄膜对MB、Rh-B染料和TC抗生素的光降解表现出优异的光催化活性，光降解率分别为87.3%、92.8%和64.7%，显著高于原始BiVO。此外，使用化学需氧量（COD）分析对Nb-BiVO薄膜进行了矿化研究。优化后的Nb-BiVO薄膜对MB、Rh-B染料和TC抗生素的COD去除率分别为83.33%、85.42%和61.36%，表现优异。目前的结果突出了通过最小化原始BiVO的电荷复合率并提高化学稳定性来增强其光催化活性的杂交方法的便利性。
