<p>Ti<sub>3</sub>C<sub>2</sub>/BiOCl composite was successfully synthesized by combining BiOCl (BOC) with an exposed (110) crystal plane and Ti<sub>3</sub>C<sub>2</sub> using a simple hydrothermal process. The photocatalytic performance of produced composite was evaluated using the degradation of rhodamine B (RhB) and tetracycline hydrochloride (TCH) under visible light. The results demonstrated that Ti<sub>3</sub>C<sub>2</sub>/BOC composite had higher photocatalytic activity than pure BOC. The optimum incorporation amount of Ti<sub>3</sub>C<sub>2</sub> was 2 wt%. The photodegradation rate of 2 wt%-Ti<sub>3</sub>C<sub>2</sub>/BOC at 10 min to 20 mg/L RhB was 97.6%, which was much higher than that of BOC (75.3%). Similarly, the photodegradation rate of 2 wt%-Ti<sub>3</sub>C<sub>2</sub>/BOC to 10 mg/L TCH at 30 min was 80.4%, which was higher than BOC (68.1%). In addition, the prepared 2 wt%-Ti<sub>3</sub>C<sub>2</sub>/BOC composite also maintained good stability even after four cycles. Electrochemical impedance spectroscopy (EIS), transient photocurrent response (IT) and ultraviolet-visible diffuse reflectance spectroscopy (UV-vis) confirmed that the photoelectrochemical properties of 2 wt%-Ti<sub>3</sub>C<sub>2</sub>/BOC composite were significantly improved. On the basis of analyzing the action mechanism of photocatalyst, it was pointed out that ·O<sub>2</sub>- and h<sup>+</sup> were the main active substances in the photodegradation of RhB and TCH by 2 wt%-Ti<sub>3</sub>C<sub>2</sub>/BOC.</p>

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Enhanced Visible Light Photocatalytic Activity of BiOCl with Ti3C2 Nanosheets for Pollutant Photodegradation

  • Jingyan Zheng,
  • Yichao Deng,
  • Mengying Xu,
  • Lian Li,
  • Pier-Luc Tremblay,
  • Tian Zhang

摘要

Ti3C2/BiOCl composite was successfully synthesized by combining BiOCl (BOC) with an exposed (110) crystal plane and Ti3C2 using a simple hydrothermal process. The photocatalytic performance of produced composite was evaluated using the degradation of rhodamine B (RhB) and tetracycline hydrochloride (TCH) under visible light. The results demonstrated that Ti3C2/BOC composite had higher photocatalytic activity than pure BOC. The optimum incorporation amount of Ti3C2 was 2 wt%. The photodegradation rate of 2 wt%-Ti3C2/BOC at 10 min to 20 mg/L RhB was 97.6%, which was much higher than that of BOC (75.3%). Similarly, the photodegradation rate of 2 wt%-Ti3C2/BOC to 10 mg/L TCH at 30 min was 80.4%, which was higher than BOC (68.1%). In addition, the prepared 2 wt%-Ti3C2/BOC composite also maintained good stability even after four cycles. Electrochemical impedance spectroscopy (EIS), transient photocurrent response (IT) and ultraviolet-visible diffuse reflectance spectroscopy (UV-vis) confirmed that the photoelectrochemical properties of 2 wt%-Ti3C2/BOC composite were significantly improved. On the basis of analyzing the action mechanism of photocatalyst, it was pointed out that ·O2- and h+ were the main active substances in the photodegradation of RhB and TCH by 2 wt%-Ti3C2/BOC.