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One-Pot Synthesis of $TiO_{2}$/Hectorite Composite and Its Photocatalytic Degradation of Methylene Blue
| Content Provider | MDPI |
|---|---|
| Author | Yang, Dingqing Chen, Jinyang Hong, Xiaomin Cui, Jingying Li, Lingzhen |
| Copyright Year | 2022 |
| Description | $TiO_{2}$/hectorite composite photocatalysts with different molar ratios of lithium, magnesium, and silicon were synthesized by a one-pot hydrothermal method. The samples were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), $N_{2}$ adsorption-desorption isotherms, and ultraviolet-visible diffuse reflectance spectra (UV-Vis DRS). When the molar ratio of lithium, magnesium, and silicon was 1.32:5.34:8 (TH-2), the composite showed the highest UV photocatalytic degradation of methylene blue (MB). The apparent rate constant of TH-2 was 0.04361 $min^{−1}$, which was about 3.12 times that of EVONIK Degussa commercial $TiO_{2}$ of AEROXIDE P25. The improvement of photocatalytic efficiency of the composite was mainly due to its high specific surface area, light trapping ability, and effective separation of electrons $(e^{−}$) and holes $(h^{+}$). At the same time, the F element of hectorite is beneficial to the formation of $Ti^{3+}$ in $TiO_{2}$, thus enhancing the photocatalytic activity. After five cycles, the removal rate of MB with TH-2 still reached 87.9%, indicating its excellent reusability. |
| Starting Page | 297 |
| e-ISSN | 20734344 |
| DOI | 10.3390/catal12030297 |
| Journal | Catalysts |
| Issue Number | 3 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-03-06 |
| Access Restriction | Open |
| Subject Keyword | Catalysts Environmental Engineering Environmental Sciences Photocatalysis Tio2 Hectorite One-pot Synthesis Degradation of Organic Dyes |
| Content Type | Text |
| Resource Type | Article |
