A HPEI modified biosorbent based on cellulose fiber was prepared promptly by MW irradiation.

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The 2H phases of MoS2 (2H-MoS2) monolayers present a wealth of new opportunities in photocatalysis owing to their photoinduced catalyzing ability and excellent charge carrier mobility. However, the complete release of their catalytic activities is restricted by their inert basal planes. Although the inert base planes of 2H-MoS2 are known to be activated by atomic doping, the operational principle of the exotic atoms remains vague. In this study, the unutilized inert base sites of MoS2 were activated via an oxygen-aided P-substituted method (denoted as POMS). Molecular structural tests and analyses of POMS indicated that the inert MoS2 substrate is activated when the inerratic crystal phases transform to amorphous phases in the P-doping process. The fully activated inert base planes provide sufficient reaction sites for photo-oxidized water contaminants. The designed POMS presented superior activity in organic degradation and completely removed sulfamethoxazole within 20 min. Uncovering these operational principles provides a theoretical basis for designing effective catalysts.

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The sulfide photocatalyst of Zn Fe S was successfully synthesized by a facile microwave-assisted method, and Zn Fe S photocatalysts were characterized using SEM, EDX, XRD and BET. The specific surface area of synthesized Zn Fe S is 78.1 m g , and total pore volume is 0.4 cm g . With bisphenol A (BPA) as a target pollutant, photocatalytic system of UV + Zn Fe S + H O was set up. Some influencing parameters, including H O dosage, initial pH value, initial concentration of BPA and Zn Fe S dosage, were investigated, and the stability of the Zn Fe S was also studied during the photocatalysis. The optimum values of operating parameters were found at an initial pH value of 5.0, a H O dosage of 0.15 mmol L and a Zn Fe S dosage of 0.08 g when the initial concentration of BPA was 10 mg L . Under the optimal conditions, the highest removal rate of BPA achieved 95%. After seven consecutive reaction cycles, the degradation efficiency of BPA could still reach 85% and there was only a little dissolution of Zn and Fe . Compared with the traditional photo-Fenton system, the UV + Zn Fe S + H O system can not only improve the degradation efficiency of BPA, but also reduce the dosage of H O and thus reduce the processing cost.