原始链接见：https://doi.org/10.1016/j.cej.2021.131830
Photothermal tests
The photothermal tests of as-prepared samples were performed as follows. 100 mg of samples were loaded on a white paper, and the initial temperature was controlled at room temperature. The temperature of the sample was measured using a Testo 865 infrared thermograph. A 300 W xenon lamp (λ > 400 nm) was used as a light source to treat prepared samples.
Results
Analysis
The photothermal effect can effectively affect photocatalytic activity. Therefore, the photothermal effect in the sample is explored by monitoring the temperature change under light irradiation (λ > 400 nm). As shown in Fig. 4g-i, the three materials show increased temperature after 5 min irradiation with a starting temperature of 25 °C. For b-TiO2,b-TiO2/MoS2 and b-TiO2/MoS2/Cu2S photocatalysts, the temperatures rise to 49.9, 53.3, and 58.2 °C, respectively. These results demonstrate that both MoS2 and Cu2S have obvious photothermal effects in b-TiO2/MoS2/Cu2S, and Cu2S is particularly pronounced. Importantly, the photothermal effect can increase the temperature of the heterojunction system under short-time light irradiation, keep the photocatalytic reaction at a higher temperature, and effectively improve the photocatalytic activity. Therefore, the coupling of the photothermal-photocatalytic effect could both promote the final solar fuel production.
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