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Construction of Double S-Scheme ZIF-67@GDY/CuI Heterojunction by Graphdiyne (g-CnH2n−2) Nanosheets-Coated ZIF-67 on Synergized Charge Transfer for Enhanced Photocatalytic Hydrogen Evolution
Solar RRL ( IF 6.0 ) Pub Date : 2023-02-08 , DOI: 10.1002/solr.202201054 Yifan Shao 1 , Xuqiang Hao 1 , Zhiliang Jin 1
Solar RRL ( IF 6.0 ) Pub Date : 2023-02-08 , DOI: 10.1002/solr.202201054 Yifan Shao 1 , Xuqiang Hao 1 , Zhiliang Jin 1
Affiliation
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Graphdiyne (GDY) is a carbon allotrope material composed of sp and sp2 hybrid carbon atoms, which has been proven to be a good carrier for anchoring metal catalysts due to its abundant alkyne bonds. Herein, a double S-scheme ZIF-67@GDY/CuI heterojunction with graphdiyne (g-CnH2n−2) nanosheets-coated ZIF-67 is prepared by a simple mixing method. The ZIF-67 dodecahedron coated with GDY nanosheets constructed S-scheme heterojunction by matching valence and conduction bands. The double S-scheme heterojunction can maintain the strong redox ability of photogenerated electron–hole pairs well and promote more efficient charge transport. The excellent charge transport path is also attributed to the unique double S-scheme heterojunction, which is confirmed by in situ X-ray photoelectron spectroscopy. Moreover, the electron migration from ZIF-67 to GDY generates an internal electric field (IEF), which improves the light energy utilization and charges separation efficiency under the condition of the IEF, band edge bending, and coulomb interaction. The optimal hydrogen production rate of ZIF-67@GDY/CuI-20 is 7.27 mmol g−1 h−1 under visible light irradiation, which is significantly increased by 4.75 times compared with the unmodified ZIF-67. Herein, a new possibility for the construction of double S-scheme heterojunction based on graphdiyne to improve photocatalytic performance is provided.
中文翻译：
Graphdiyne (g-CnH2n−2) Nanosheets-Coated ZIF-67 构建双 S 型 ZIF-67@GDY/CuI 异质结以协同电荷转移增强光催化析氢
石墨炔(GDY)是一种由sp和sp 2杂化碳原子组成的碳同素异形体材料，由于其丰富的炔键，已被证明是锚定金属催化剂的良好载体。在此，双 S 型 ZIF-67@GDY/CuI 异质结与石墨二炔 (gC n H 2 n -2) 纳米片涂层的 ZIF-67 是通过简单的混合方法制备的。涂有 GDY 纳米片的 ZIF-67 十二面体通过匹配价带和导带构建了 S 型异质结。双S型异质结可以很好地保持光生电子-空穴对的强氧化还原能力，促进更有效的电荷传输。优异的电荷传输路径也归功于独特的双S型异质结，这已通过原位X射线光电子能谱得到证实。此外，从ZIF-67到GDY的电子迁移产生了内电场（IEF），在IEF、带边弯曲和库仑相互作用的条件下提高了光能利用和电荷分离效率。ZIF-67@GDY/CuI-20的最佳产氢率为7.27 mmol g-1 h -1在可见光照射下，与未修饰的ZIF-67相比显着提高了4.75倍。在此，为构建基于石墨二炔的双S型异质结提高光催化性能提供了一种新的可能性。
更新日期：2023-02-08
中文翻译：
Graphdiyne (g-CnH2n−2) Nanosheets-Coated ZIF-67 构建双 S 型 ZIF-67@GDY/CuI 异质结以协同电荷转移增强光催化析氢
石墨炔(GDY)是一种由sp和sp 2杂化碳原子组成的碳同素异形体材料，由于其丰富的炔键，已被证明是锚定金属催化剂的良好载体。在此，双 S 型 ZIF-67@GDY/CuI 异质结与石墨二炔 (gC n H 2 n -2) 纳米片涂层的 ZIF-67 是通过简单的混合方法制备的。涂有 GDY 纳米片的 ZIF-67 十二面体通过匹配价带和导带构建了 S 型异质结。双S型异质结可以很好地保持光生电子-空穴对的强氧化还原能力，促进更有效的电荷传输。优异的电荷传输路径也归功于独特的双S型异质结，这已通过原位X射线光电子能谱得到证实。此外，从ZIF-67到GDY的电子迁移产生了内电场（IEF），在IEF、带边弯曲和库仑相互作用的条件下提高了光能利用和电荷分离效率。ZIF-67@GDY/CuI-20的最佳产氢率为7.27 mmol g-1 h -1在可见光照射下，与未修饰的ZIF-67相比显着提高了4.75倍。在此，为构建基于石墨二炔的双S型异质结提高光催化性能提供了一种新的可能性。
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