Facile Synthesize And Load SnIn₄S₈ And The Study Of Photocatalytic Degradation MO

With the rapid industrialization, a large amount of dyes were released into the environment every year through industrial wastewater discharges due to the wide use of textile, printing and dying, cosmetic, petroleum and leather. However, dyes are often toxic, carcinogenic, mutagenic and can even bio-accumulate in the food chain, causing severe damage to the aquatic ecosystem and human being. As a result, it was extremely urgent to effectively treatment these dyes from wastewater. However, several traditional treatment technologies including adsorption, coagulation, biological treatment, chemical treatment can’t effectively treatment these dyes from wastewater. Hterogeneous photocatalytic oxidation technologies have received a great deal of attention due to its easy operation procedures, environmental friendliness, low cost, strong oxidation power and can effectively treatment dyes from wastewater. Herein, we first synthesized the high-efficiency photocatalysis SnIn4S8 by a low-temperature co-precipitation method with short reaction time, low energy consumption, the photocatalysis can photocatalytic degradation MO effectively. what’t more, we use g-C3N4 doping which can improve the efficiency of photocatalytic degradation MO. The details are summarized as follows:(1) Hierarchical network-like SnIn4S8 microspheres were synthesized by a facile co-precipitation method at low temperature, and the effects of preparation temperature and reaction time on the visible-light photocatalytic activity of SnIn4S8 were investigated. SnIn4S8 photocatalysts were characterized by XRD, SEM, EDS, N2adsorption-desorption and DRS. The result shows that the preparation temperature and reaction time have great influence on the photocatalytic activity of SnIn4S8, and the optimized condition is 70 oC and 3 h, The photocatalytic activity of SnIn4S8 is superior to that of SnIn4S8 prepared by hydrothermal method. The mechanism for MO degradation is that photogenerated holes(h+).(2) The novel g-C3N4/SnIn4S8 composite photocatalysts were prepared through low-temperature co-precipitation method by tuning a amount of g-C3N4 in the dispersion. The influence of g-C3N4 droping amount on the visible-light photocatalytic activity were investigated. The samples were characterized by XRD, SEM, TEM and DRS. The optimal g-C3N4 content in the composite is 15 wt.%. The MO degradation is obvious improved compared with SnIn4S8. The reason is that g-C3N4 play a part of transfer the electron, which is beneficial for the generation and transfer of photo-generated electrons and holes, while excessive g-C3N4 could shield SnIn4S8 fromlight as well as promote electron-hole recombination. The mechanism for MO degradation is that photogenerated holes(h+).