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Fabrication of Ag-doped MoO3 and its nanohybrid with a two-dimensional carbonaceous material to enhance photocatalytic activity
Advanced Powder Technology ( IF 4.2 ) Pub Date : 2022-02-25 , DOI: 10.1016/j.apt.2022.103482
Sheraz Bashir 1 , Amir Habib 2 , Akmal Jamil 3 , Amira Alazmi 4 , Muhammad Shahid 3
Affiliation  

Recently, two-dimensional (2D) carbon-based materials and their nanocomposites have gained considerable fascination as a photocatalysts due to their remarkable contribution towards photocatalytic water splitting and remediation. Herein, a novel 2D reduced graphene oxide (rGO) based silver doped molybdenum trioxide (Ag/MoO3) photocatalyst was synthesized successfully via hydrothermal and ultra-sonication methods. The surface structure, morphology, functional group characterization, and bandgap of the synthesized photocatalysts were analyzed using advanced physicochemical techniques. The photocatalytic performance of the prepared materials was scrutinized for Methylene blue (MB) dye degradation under solar light illumination. Because of its lower charge transfer resistance (19.54 Ω) and higher electrical conductivity (12.74 × 102 Sm−1) the rGO/Ag/MoO3 photocatalyst demonstrated significantly higher photocatalytic activity for dye removal than pure MoO3 and Ag/MoO3 photocatalysts. In particular, the rGO/Ag/MoO3 photocatalyst illustrated about 98% dye degradation at a rate constant (0.0571 min−1) greater than MoO3 (0.0097 min−1) and Ag/MoO3 (0.0184 min−1). Ag doping and the addition of rGO sheets led to enhanced optical absorbance and effectual separation of photo-induced electron-hole pairs, causing major progress in the photocatalytic behavior of MoO3. Transient photocurrent results revealed longstanding photo-excited charge carriers in the graphene-based material.



中文翻译:

用二维碳质材料制备 Ag 掺杂的 MoO3 及其纳米杂化物以提高光催化活性

最近,二维(2D)碳基材料及其纳米复合材料因其对光催化水分解和修复的显着贡献而作为光催化剂获得了相当大的关注。在此,通过水热法和超声法成功合成了一种新型二维还原氧化石墨烯(rGO)基银掺杂三氧化钼(Ag/MoO 3 )光催化剂。使用先进的物理化学技术分析了合成光催化剂的表面结构、形貌、官能团表征和带隙。对所制备材料的光催化性能进行了仔细研究,以在太阳光照射下对亚甲基蓝 (MB) 染料进行降解。 由于其较低的电荷转移电阻 (19.54 Ω) 和较高的电导率 (12.74 × 10 2 Sm -1 ),rGO/Ag/MoO 3光催化剂表现出比纯 MoO 3和 Ag/MoO 3光催化剂显着更高的染料去除光催化活性. 特别地,rGO/Ag/MoO 3光催化剂以大于MoO 3 (0.0097 min -1 )和Ag/MoO 3 (0.0184 min -1 )的速率常数(0.0571 min -1 )显示了约98%的染料降解)。Ag 掺杂和 rGO 片的添加导致光吸收增强和光致电子-空穴对的有效分离,导致 MoO 3的光催化行为取得重大进展。瞬态光电流结果揭示了石墨烯基材料中长期存在的光激发电荷载流子。

更新日期:2022-02-25
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