Figure 4. (A) EPR spectra, (B) N2 adsorption-desorption isotherms, (C) O2-TPD profiles and (D) the water contact angle measurements of ZIS and BZIS-1/20. EPR: Electron paramagnetic resonance; O2-TPD: oxygen temperature-programmed desorption; ZIS: ZnIn2S4; BZIS: Bi2S3/ZnIn2S4.
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