Study On The Synthesis Of BiOCl And Its Adsorption And Photocatalytic Properties For Dyes

In this paper, we devoted to synthesize BiOCl film and BiOCl nanosheets with tunable diameters by hydrolysis method and solvothermal method. The adsorption and photocatalytic properties were evaluated by organic dyes. The main contents were shown as the following:(1) A facile one-step method was developed for the first time to fabricate BiOCl film on Cu substrate by simply dipping the Cu substrate in the mixed solution containing HCl, glycol, H2O2 and BiCl3. The absorption capacity of BiOCl film was investigated by adsorption of Rhodamine B and Congo red and their maximum adsorption capacities were 1667 and 1429 mg g-1, respectively. The negative values of free energy and the positive values of enthalpy suggested that the adsorption were spontaneous and endothermic, respectively. This film could be reused and the recycle rates for Rhodamine B and Congo red were still about 95% and 75% after five cycles, respectively.(2) High quality BiOCl with(001) facets were successfully synthesized via a facile solvothermal method by controlling the volume ratio of ethanol(ET) and ethylene glycol(EG). The diameters of BiOCl nanosheets with(001) facets varied from 600 to 50 nm with the increase of EG content while the thickness nearly remained the same. The 91.84%(001) facets exposed BiOCl nanosheets with diameter of 300–600 nm exhibited the hightest photocatalytic activity for the degradation of rhodamine B(Rh B) under visible light irradiation. More importantly, the RhB sensitized BiOCl nanosheets showed effective photocatalytic property for breaking down methylene blue(MB) and methyl orange(MO) while RhB keeping almost intact until MB and MO had been photodegraded. This findings may provide a promising approach method for synthesizing other metal oxyhalide materials with controllable diameters of nanosheets and deepen our comprehending for the role of the semiconductor in the sensitization process.