Acta Chimica Sinica ›› 2021, Vol. 79 ›› Issue (10): 1293-1301.DOI: 10.6023/A21060265 Previous Articles    


2D/3D ZnIn2S4/TiO2复合物的原位构筑及其提高的光催化性能

刘欢, 李京哲, 李平*(), 张广智, 张广智, 张豪, 邱灵芳, 齐晖, 多树旺*()   

  1. 江西科技师范大学材料与机电学院 江西省材料表面工程重点实验室 南昌 330038
  • 投稿日期:2021-06-10 发布日期:2021-08-10
  • 通讯作者: 李平, 多树旺
  • 基金资助:
    国家自然科学基金(41763020); 江西省自然科学基金(20202BABL214040); 江西省自然科学基金(20202BABL213014); 江西省教育厅科学技术研究项目(GJJ180596); 江西省教育厅科学技术研究项目(GJJ190607)

In-situ Construction of 2D/3D ZnIn2S4/TiO2 with Enhanced Photocatalytic Performance

Huan Liu, Li Li, Ping Li(), Guangzhi Zhang, Xun Xu, Hao Zhang, Lingfang Qiu, Hui Qi, Shuwang Duo()   

  1. Jiangxi Key Laboratory of Material Surface Engineering, School of Materials and Mechanical & Electrical Engineering, Jiangxi Science and Technology Normal University, Nanchang 330038, China
  • Received:2021-06-10 Published:2021-08-10
  • Contact: Ping Li, Shuwang Duo
  • Supported by:
    National Natural Science Foundation of China(41763020); Natural Science Foundation of Jiangxi Province(20202BABL214040); Natural Science Foundation of Jiangxi Province(20202BABL213014); Science and Technology Foundation of Jiangxi Educational Commission(GJJ180596); Science and Technology Foundation of Jiangxi Educational Commission(GJJ190607)

To study the influence of the construction of heterojunction on the visible-light response range and the photo-generated charge carriers separation efficiency of TiO2, two dimensional/three dimensional (2D/3D) ZnIn2S4/TiO2 heterojunctions were synthesized by high-temperature calcination followed by a facile oil bath method, and were investigated for the photodegradation of Rhodamine B (RhB) and tetracycline (TC). X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) were applied to investigate the composition, crystal structure, and morphology of the as-prepared specimens. UV-visible diffuse reflectance spectra (UV-vis DRS), electrochemical impedance spectroscopy (EIS), photocurrent measurement, photoluminescence (PL) spectra, and first-principles calculation were also performed to investigate the photoelectric property. The results showed TiO2 maintains the morphology of metal-organic frameworks (MOFs) with narrow visible-light response range and high photo-generated charge recombination efficiency. After coupling with ZnIn2S4 nanosheets, a larger specific surface area was obtained with offering more active sites for photocatalytic reaction. The band gap of the composite was reduced from 3.23 eV of TiO2 to 2.52 eV of ZnIn2S4/TiO2-II, and thus obtaining an extended visible-light response range and enhancing visible light utilization rate. The energy band structure acquired from the UV-vis DRS and XPS valence band spectra indicated a construction of type II heterojunction in the ZnIn2S4/TiO2 composite, and thus improving the separation and transfer efficiency of photo-generated carrier pairs, which was confirmed by the PL, EIS and photocurrent test results. Under the visible light, ZnIn2S4/TiO2 displayed significantly enhanced photocatalytic activity than bare TiO2 and ZnIn2S4. Among of ZnIn2S4/TiO2 photocatalysts, ZnIn2S4/TiO2-II possessed the highest photocatalytic degradation efficiency (93%) of RhB solution within 60 min, which was nearly 18 and 2 times higher than pristine TiO2 and ZnIn2S4, respectively. Besides, the ZnIn2S4/TiO2-II photocatalyst also showed enhanced photocatalytic activity for TC degradation than pure TiO2 and ZnIn2S4. The cycle experiment showed that the ZnIn2S4/TiO2-II photocatalyst could maintain good reusability, and it could still photodegrade 83% RhB after 5-cycle test. This work demonstrates that constructing 2D/3D ZnIn2S4/TiO2 heterojunction based on MOFs-derived TiO2 is an efficient strategy for significantly enhancing the photocatalytic activity of TiO2.

Key words: photocatalysis, titanium dioxide, metal-organic frameworks, heterojunction, visible-light response