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Facial synthesis of a novel Ag4V2O7/g‐C3N4 heterostructure with highly efficient photoactivity
Journal of the American Ceramic Society ( IF 3.5 ) Pub Date : 2019-01-10 , DOI: 10.1111/jace.16254
Tongtong Zhang 1 , Danfeng Zhao 1 , Yue Wang 1 , Yukun Chang 1 , Dafeng Zhang 1 , Yunxiang Tang 1 , Xipeng Pu 1 , Xin Shao 1
Affiliation  

A novel Ag4V2O7/g‐C3N4 heterostructure was synthesized by a facial etching method in ammonia solution using Ag2VO2PO4/g‐C3N4 as a self‐sacrifice precursor. With the concentration of ammonia solution increasing from 0.05 to 0.2 M, phase transformation took place, described as: Ag2VO2PO4/g‐C3N4 → Ag2VO2PO4/Ag4V2O7/g‐C3N4 → Ag4V2O7/g‐C3N4. Compared with pristine Ag2VO2PO4/g‐C3N4, the etched samples of Ag4V2O7/g‐C3N4 and Ag2VO2PO4/Ag4V2O7/g‐C3N4 exhibited dramatically improved activity for the degradation of methylene blue (MB), methyl orange (MO) and imidacloprid under visible light irradiation. When etched with 0.15 M ammonia solution, an Ag4V2O7/g‐C3N4 heterostructure was obtained that exhibited the highest photoactivity. This photocatalyst was nearly 9.1, 3.0, and 24.3 times more efficient than pristine Ag2VO2PO4/g‐C3N4 for degradation of MB, MO and imidacloprid, respectively. The excellent photocatalytic performance can be ascribed to the as‐obtained well‐defined Ag4V2O7/g‐C3N4 heterojunction, which improves the separation and transfer efficiency and prolongs the lifetime of photoinduced charges. In addition, the stability and dominant radicals were investigated.

中文翻译:

具有高效光敏性的新型Ag4V2O7 / g-C3N4异质结构的表面合成

以Ag 2 VO 2 PO 4 / g-C 3 N 4为自我牺牲的前驱体,通过在氨溶液中通过面部蚀刻法合成了一种新型的Ag 4 V 2 O 7 / g-C 3 N 4异质结构。随着氨溶液的浓度从0.05 M增加到0.2 M,发生了相变,描述为:Ag 2 VO 2 PO 4 / g-C 3 N 4 →Ag 2 VO 2 PO 4 / Ag 4 V 2 O 7/克-C 3 Ñ 4 →的Ag 4 V 2 ö 7 / G-C 3 Ñ 4。与原始的Ag 2 VO 2 PO 4 / g-C 3 N 4相比,Ag 4 V 2 O 7 / g-C 3 N 4和Ag 2 VO 2 PO 4 / Ag 4 V 2 O 7 / g的蚀刻样品‐C 3 N 4在可见光照射下,其降解亚甲蓝(MB),甲基橙(MO)和吡虫啉的活性显着提高。当用0.15 M氨溶液蚀刻时,获得的Ag 4 V 2 O 7 / g-C 3 N 4异质结构表现出最高的光活性。该光催化剂降解MB,MO和吡虫啉的效率分别比原始Ag 2 VO 2 PO 4 / g-C 3 N 4高9.1倍,3.0倍和24.3倍。出色的光催化性能可归因于获得的明确定义的Ag 4 V 2O 7 / g-C 3 N 4异质结,可提高分离和转移效率,并延长光生电荷的寿命。此外,还研究了稳定性和主要自由基。
更新日期:2019-01-10
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