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Na-doped g-C3N4/NiO 2D/2D laminated p–n heterojunction nanosheets toward optimized photocatalytic performance
Dalton Transactions ( IF 3.5 ) Pub Date : 2022-11-24 , DOI: 10.1039/d2dt03197c Jiapeng Gao 1 , Zipeng Xing 1 , Meijie Liu 1 , Yichao Wang 1 , Na Zhang 1 , Zhenzi Li 2 , Peng Chen 1 , Wei Zhou 1, 2
Dalton Transactions ( IF 3.5 ) Pub Date : 2022-11-24 , DOI: 10.1039/d2dt03197c Jiapeng Gao 1 , Zipeng Xing 1 , Meijie Liu 1 , Yichao Wang 1 , Na Zhang 1 , Zhenzi Li 2 , Peng Chen 1 , Wei Zhou 1, 2
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Na-doped g-C3N4/NiO 2D/2D laminated p–n heterojunction nanosheets are fabricated by facile calcination and hydrothermal methods. The average thickness of g-C3N4 nanosheets is ∼1.388 nm, and the ultrathin structure allows for a high specific surface area and enough surface active sites, increasing the surface reactivity. The flower ball like structure of NiO increases the light utilization rate. Na doping accelerates charge separation and transport by increasing the electrical conductivity. The g-C3N4 and NiO nanosheets form 2D/2D laminated structures, and the spherical structure can suppress the agglomeration of 2D nanosheets, which could realize adequate interface contact and form efficient p–n heterojunctions. The p–n heterostructure builds an internal electric field to accelerate spatial charge separation. Under visible light irradiation, the photocatalytic degradation efficiency for ciprofloxacin and the hydrogen production rate of Na-doped g-C3N4/NiO are up to 99.0%, and 2299.32 μmol h−1 g−1, respectively, which are several times higher than those of the pristine one. The fabrication strategy for 2D/2D laminated heterojunctions may provide new insights for the preparation of novel laminated photocatalysts with high performance.
中文翻译：
Na掺杂的g-C3N4/NiO 2D/2D层压p-n异质结纳米片优化光催化性能
Na 掺杂的 gC 3 N 4 /NiO 2D/2D 层压 p-n 异质结纳米片是通过简便的煅烧和水热法制备的。gC 3 N 4纳米片的平均厚度为~1.388 nm，超薄结构允许高比表面积和足够的表面活性位点，提高表面反应活性。NiO的花球状结构提高了光的利用率。Na 掺杂通过增加电导率来加速电荷分离和传输。gC 3 N 4和NiO纳米片形成2D/2D层状结构，球形结构可以抑制2D纳米片的团聚，实现充分的界面接触，形成高效的p-n异质结。p-n 异质结构建立内部电场以加速空间电荷分离。在可见光照射下，Na掺杂gC 3 N 4 /NiO对环丙沙星的光催化降解效率和产氢率高达99.0%，2299.32 μmol h −1 g −1，分别比原始的高几倍。2D/2D层压异质结的制备策略可能为制备新型高性能层压光催化剂提供新的思路。
更新日期：2022-11-24
中文翻译：
Na掺杂的g-C3N4/NiO 2D/2D层压p-n异质结纳米片优化光催化性能
Na 掺杂的 gC 3 N 4 /NiO 2D/2D 层压 p-n 异质结纳米片是通过简便的煅烧和水热法制备的。gC 3 N 4纳米片的平均厚度为~1.388 nm，超薄结构允许高比表面积和足够的表面活性位点，提高表面反应活性。NiO的花球状结构提高了光的利用率。Na 掺杂通过增加电导率来加速电荷分离和传输。gC 3 N 4和NiO纳米片形成2D/2D层状结构，球形结构可以抑制2D纳米片的团聚，实现充分的界面接触，形成高效的p-n异质结。p-n 异质结构建立内部电场以加速空间电荷分离。在可见光照射下，Na掺杂gC 3 N 4 /NiO对环丙沙星的光催化降解效率和产氢率高达99.0%，2299.32 μmol h −1 g −1，分别比原始的高几倍。2D/2D层压异质结的制备策略可能为制备新型高性能层压光催化剂提供新的思路。
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