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Flower-like hierarchical h-MoO3: new findings of efficient visible light driven nano photocatalyst for methylene blue degradation

机译:花状分层H-MOO3:有效可见的光驱动纳米光催化剂的新发现,用于亚甲基蓝色降解

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摘要

Hexagonal molybdenum oxide (h-MoO3) nanocrystals with a flower-like hierarchical structure have been successfully synthesized by a solution based self assembly route. The as-synthesized h-MoO3 was recognized as a photocatalyst for the photocatalytic degradation of methylene blue (MB) under various experimental conditions. Initially, the as-synthesized h-MoO3 was characterized by different physico-chemical techniques in order to study and reveal the structural, functional, morphological, and optical properties. The results indicated that the photocatalyst has a hexagonal crystal structure with an average crystallite size of 46 nm. The morphology analysis has proved that the h-MoO3 comprises one dimensional (1D) rods with a hexagonal cross section. The possible formation mechanism is proposed as a self assembly process for nucleation and an Ostwald ripening mechanism for particle growth. The optical band gap investigation showed that the E_g value of h-MoO3 (2.94 eV) lies in the visible region and can be an appropriate candidate for visible light photocatalytic application. Furthermore, the experimental observations demonstrate an excellent photocatalytic performance of h-MoO3 in the degradation of MB under visible light irradiation.
机译:六边形钼氧化物(H-MOO3)纳米晶体具有类似花状的层次结构的纳米晶体,已通过基于溶液的自组装途径成功合成。在各种实验条件下,甲基蓝色(MB)的光催化降解是一种光催化降解的光催化剂。最初,AS合成的H-MOO3的特征是不同的物理化学技术,以研究和揭示结构,功能,形态和光学特性。结果表明,光催化剂具有六边形晶体结构,平均晶体大小为46 nm。形态分析已证明,H-MOO3包含具有六边形横截面的一维(1D)杆。提出可能的形成机制作为成核的自组装过程和颗粒生长的奥斯特瓦尔德成熟机制。光条间隙调查表明,H-MOO3(2.94 eV)的E_G值位于可见区域,可以是可见光光催化应用的合适候选者。此外,实验观察结果表明,在可见光照射下MB降解中H-MOO3的光催化性能出色。

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