| 引用本文: | 张广山,王鹏,郑彤.可见光响应型(CuAg)xIn2xZn2(1-2x)S2光催化剂的光催化制氢[J].哈尔滨工业大学学报,2014,46(6):34.DOI:10.11918/j.issn.0367-6234.2014.06.007 |
| ZHANG Guangshan,WANG Peng,ZHENG Tong.Photocatalytic hydrogen production of visible-light-responsive (CuAg)xIn2xZn2(1-2x) S2 photocatalysts[J].Journal of Harbin Institute of Technology,2014,46(6):34.DOI:10.11918/j.issn.0367-6234.2014.06.007 |
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| 摘要: |
| 为实现可见光下分解水制氢,用沉淀煅烧法合成系列(CuAg)xIn2xZn2(1-2x)S2光催化剂．采用X射线衍射仪(XRD)、紫外可见吸收光谱(UV-Vis)、电位粒径仪(DLS)、X射线能谱(EDS)、电感耦合等离子体质谱(ICP-MS)等方法研究了光催化剂的能带结构,评价其光催化性能．结果表明,随着组成配比x值的增加,光催化剂的光吸收从紫外光向可见光扩展,禁带宽度逐渐变小. 通过计算发现,光催化剂的导带电位逐渐接近氢的氧化还原电位．合成的(CuAg)xIn2xZn2(1-2x)S2 (x=0.05~0.30)在可见光下都能光催化产氢,并且(CuAg)0.15In0.3Zn1.4S2(即x=0.15)具有最高的光催化制氢活性．调节组成配比可调控光催化剂的能带结构,有助于获得具有高活性和稳定性的可见光响应型光催化剂． |
| 关键词: 光催化剂 (CuAg)xIn2xZn2(1-2x)S2 可见光 制氢 水分解 禁带宽度 |
| DOI：10.11918/j.issn.0367-6234.2014.06.007 |
| 分类号:O643 |
| 基金项目:国家自然科学基金委员会创新研究群体科学基金(51121062). |
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| Photocatalytic hydrogen production of visible-light-responsive (CuAg)xIn2xZn2(1-2x) S2 photocatalysts |
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ZHANG Guangshan1, WANG Peng1,2, ZHENG Tong1
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(1. School of Municipal and Environmental Engineering, Harbin Institute of Technology, 150090 Harbin, China; 2. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 150090 Harbin, China)
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| Abstract: |
| To fulfill photocatalytic H2 production under visible light irradiation, (CuAg)xIn2xZn2(1-2x)S2 photocatalysts were synthesized using the precipitation and calcination. X-ray diffraction (XRD), ultraviolet-visible absorption spectra (UV-Vis), dynamic light scattering (DLS), energy-dispersive X-ray spectroscopy (EDS), and inductively coupled plasma mass spectrometry (ICP-MS) were employed to investigate band structures of the photocatalysts and evaluate photocatalytic activities. The results show that the absorption edges shift to longer wavelengths up to visible-light region and band gaps decrease with the increase of x. In addition, the conduction band potentials are close to the redox potential of H+／H2 with the increase of x. The prepared (CuAg)xIn2xZn2(1-2x)S2 (x=0.05-0.30) photocatalysts exhibit the activities of H2 production under visible light irradiation, and (CuAg)0.15In0.3Zn1.4S2(x=0.15) shows the highest photocatalytic activity. The band structures of (CuAg)xIn2xZn2(1-2x)S2 were manipulated by adjusting the composition ratio, which will help design visible-light-response photocatalysts with the high activity and stability. |
| Key words: photocatalyst (CuAg)xIn2xZn2(1-2x)S2 visible light hydrogen production water splitting band gap |
