标题：Construction of noble-metal-free TiO2 nanobelt/ZnIn2S4 nanosheet heterojunction nanocomposite for highly efficient photocatalytic hydrogen evolution
作者：Wei, Na ;Wu, Yanhao ;Wang, Mingliang ;Sun, Wenxia ;Li, Zhenkui ;Ding, Lei ;Cui, Hongzhi
作者机构：[Wei, Na ;Wu, Yanhao ;Wang, Mingliang ;Sun, Wenxia ;Li, Zhenkui ;Ding, Lei ;Cui, Hongzhi ] School of Materials Science and Engineering, Shandong Unive 更多
摘要：A binary nanocomposite composed of two-dimensional (2D) ultrathin ZnIn2S4 nanosheets and one-dimension (1D) TiO2 nanobelts was prepared and applied as a noble-metal-free photocatalyst for hydrogen evolution under solar-light irradiation. The TiO2 nanobelt/ZnIn2S4 nanosheet heterojunction nanocomposites show higher light absorption capacity, larger surface area and higher separation of charge carriers in comparison to pristine TiO2 and ZnIn2S4. As a result, the hydrogen production over the TiO2/ZnIn2S4 nanocomposite with 15 wt% TiO2 can reach up to 348.21 μmol • g-1 • h-1, even without noble metals, which is about 26 and 2.3 times higher than the pristine TiO2 and ZnIn2S4, respectively. Meanwhile, a possible photocatalytic mechanism of TiO2/ZnIn2S4 heterojunction nanocomposites was proposed and corroborated by photoluminescence (PL) spectroscopy and photoelectrochemical (PEC) results. This work paves a way for developing low-cost and high-efficiency noble-metal-free photocatalytic systems for solar-to-hydrogen evolution.
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