Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China.
School of Environmental & Safety Engineering, Changzhou University, Changzhou 213164, P. R. China.
Inorg Chem. 2023 Jun 19;62(24):9702-9712. doi: 10.1021/acs.inorgchem.3c01317. Epub 2023 Jun 7.
The construction of a heterojunction structure is considered a significant route to promote solar-driven H production. Herein, a CDs/ZnInS/Ni-Al LDHs (CDZNA) ternary heterojunction was elaborately constructed the growth of ZnInS on Ni-Al LDHs with the incorporation of carbon dots (CDs) cocatalyst, which was used as a highly efficient catalyst for the photocatalytic H generation. Characterizations indicated that 2D ZnInS nanosheet homogeneously dispersed on the surface of Ni-Al LDHs fabricated an intimate hierarchical architecture and provided a high BET surface area (135.12 m g). In addition, the unique embeddable-dispersed CDs as electron mediators possessed numerous active sites and promoted the charge separation on ZnInS/Ni-Al LDHs (ZNA) binary catalyst. By coupling these two features, the CDZNA catalyst exhibited a considerable H production rate of 23.1 mmol g h under visible-light illumination, which was 16.4 and 1.4 times higher than those of ZnInS and ZNA, respectively. A proposed mechanism of photocatalytic H production over the CDZNA catalyst was also discussed. This work provides a promising strategy to achieve highly efficient solar energy conversion in a ternary photocatalytic system.
构建异质结结构被认为是促进太阳能驱动 H 2 生产的重要途径。在此，通过在 Ni-Al LDHs 上生长 ZnInS 并掺入碳点 (CDs) 助催化剂，精心构建了 CDs/ZnInS/Ni-Al LDHs (CDZNA) 三元异质结，该异质结被用作光催化 H 2 产生的高效催化剂。表征表明，2D ZnInS 纳米片均匀分散在 Ni-Al LDHs 表面上，形成了紧密的分层结构，并提供了高 BET 表面积 (135.12 m 2 g -1 )。此外，独特的嵌入式分散 CDs 作为电子介体具有众多活性位点，促进了 ZnInS/Ni-Al LDHs (ZNA) 二元催化剂上的电荷分离。通过结合这两个特点，CDZNA 催化剂在可见光照射下表现出相当高的 H 2 生成速率为 23.1 mmol g -1 h -1 ，分别是 ZnInS 和 ZNA 的 16.4 倍和 1.4 倍。还讨论了 CDZNA 催化剂光催化 H 2 产生的机理。这项工作为在三元光催化系统中实现高效太阳能转换提供了一种有前途的策略。
