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Integrated Ni(OH)2-TiO2-Cu2O Hybrids with a Synergic Impact of the p–n Heterojunction/Cocatalyst for Enhanced Photocatalytic Hydrogen Production
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2023-07-11 , DOI: 10.1021/acs.iecr.3c01302
Chunyan Wang 1 , Jinyan Xiong 2 , Zhipan Wen 1, 3 , Gang Cheng 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2023-07-11 , DOI: 10.1021/acs.iecr.3c01302
Chunyan Wang 1 , Jinyan Xiong 2 , Zhipan Wen 1, 3 , Gang Cheng 1
Affiliation
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Designing a hybrid photocatalyst with multichannel charge separation could address the issue of rapid recombination of photo-induced electron–hole pairs from a single semiconductor and assist photocatalytic hydrogen evolution. In this work, the Ni(OH)2-TiO2-Cu2O ternary hybrid has been successfully prepared with a combination of hydrothermal-calcination-chemical reduction methods. Particularly, Ni(OH)2 species and Cu2O nanoparticles are anchored on a TiO2 nanoflake assembly. Upon light illumination, photocatalytically splitting water to hydrogen is achieved by the as-synthesized ternary hybrids. Among them, the 0.83% Ni(OH)2-TiO2–4.5% Cu2O hybrid exhibits the highest photocatalytic performance. Particularly, the hydrogen generation rate (8384.84 μmol g–1 h –1) of 0.83% Ni(OH)2-TiO2–4.5% Cu2O is 3.5 times higher than that of pristine TiO2 (2369.94 μmol g–1 h –1). It is also superior to the binary 0.83% Ni(OH)2-TiO2 and TiO2–4.5% Cu2O samples. It is demonstrated that the formed p–n junction in the interface of TiO2 and Cu2O as well as the cocatalytic effect of Ni(OH)2 species could offer multichannels for efficient charge transfer, contributing to the improved photocatalytic hydrogen production.
中文翻译：
集成 Ni(OH)2-TiO2-Cu2O 杂化物与 p-n 异质结/助催化剂的协同作用，可增强光催化产氢能力
设计具有多通道电荷分离的混合光催化剂可以解决单个半导体中光诱导电子空穴对快速重组的问题，并有助于光催化析氢。本工作采用水热-煅烧-化学还原相结合的方法成功制备了Ni(OH) 2 -TiO 2 -Cu 2 O三元杂化材料。特别地，Ni(OH) 2物质和Cu 2 O纳米颗粒锚定在TiO 2纳米片组件上。在光照下，合成的三元杂化物可以光催化地将水分解为氢气。其中，0.83% Ni(OH) 2 -TiO 2–4.5% Cu 2 O杂化物表现出最高的光催化性能。特别是0.83% Ni(OH) 2 -TiO 2 –4.5% Cu 2 O的产氢速率(8384.84 μmol g –1 h –1 )是原始TiO 2 (2369.94 μmol g –1 h –1 )的3.5倍。 –1）。它还优于二元 0.83% Ni(OH) 2 -TiO 2和 TiO 2 –4.5% Cu 2 O 样品。证明了TiO 2和Cu 2 O界面上形成的p-n结以及Ni(OH)的协同催化作用两种物质可以提供有效电荷转移的多通道，有助于提高光催化制氢能力。
更新日期：2023-07-11
中文翻译：
集成 Ni(OH)2-TiO2-Cu2O 杂化物与 p-n 异质结/助催化剂的协同作用，可增强光催化产氢能力
设计具有多通道电荷分离的混合光催化剂可以解决单个半导体中光诱导电子空穴对快速重组的问题，并有助于光催化析氢。本工作采用水热-煅烧-化学还原相结合的方法成功制备了Ni(OH) 2 -TiO 2 -Cu 2 O三元杂化材料。特别地，Ni(OH) 2物质和Cu 2 O纳米颗粒锚定在TiO 2纳米片组件上。在光照下，合成的三元杂化物可以光催化地将水分解为氢气。其中，0.83% Ni(OH) 2 -TiO 2–4.5% Cu 2 O杂化物表现出最高的光催化性能。特别是0.83% Ni(OH) 2 -TiO 2 –4.5% Cu 2 O的产氢速率(8384.84 μmol g –1 h –1 )是原始TiO 2 (2369.94 μmol g –1 h –1 )的3.5倍。 –1）。它还优于二元 0.83% Ni(OH) 2 -TiO 2和 TiO 2 –4.5% Cu 2 O 样品。证明了TiO 2和Cu 2 O界面上形成的p-n结以及Ni(OH)的协同催化作用两种物质可以提供有效电荷转移的多通道，有助于提高光催化制氢能力。
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