Preparation Of MoS₂/TiO₂ And MoS₂/TiO₂/CQDs And Its Catalytic Performance Research

With the progress of human society and economic development,environmental pollution has become more and more prominent.As a precious non-renewable resource,water resources are more worthy of our protection.The development of industrialization and population growth have caused a large amount of industrial sewage and domestic sewage to be discharged into natural water bodies,causing greater hidden dangers to our human health and natural ecology.General biological and physical methods may be difficult to meet the requirements for the treatment of refractory pollutants.Therefore,photoelectric catalytic technology has come into people’s eyes as a green,high-efficiency and no secondary pollution advanced oxidation technology.This article is dedicated to the study of the preparation and performance of related photoelectric catalytic electrodes.The MoS₂/TiO₂photoelectrocatalyst electrode was prepared by etching,calcination,and hydrothermal methods.Using XPS,XRD and SEM techniques,it was confirmed that MoS₂was successfully loaded on the TiO₂electrode.Combined with LSV,M-S,EIS and other means,it was determined that the new MoS₂/TiO₂electrode has a smaller charge transfer barrier and photoelectric conversion efficiency,which effectively enhanced the photoelectric catalytic activity of the electrode.The prepared MoS₂/TiO₂photoelectric catalytic electrode was used for the degradation of3-chlorophenol simulated wastewater.The results showed that the MoS₂/TiO₂photocatalytic electrode had the best degradation efficiency on 3-chlorophenol wastewater under the photoelectric catalytic synergy,and 2.5V was the best Voltage.The degradation effect is better in acidic 3-chlorophenol wastewater.It is suitable for low-concentration 3-chlorophenol wastewater,and has good stability.It is concluded that the main active species in the degradation process of 3-chlorophenol is O^2·-by adding different capture agents.Through the hydrothermal method,C quantum dots（CQDs）were loaded on the previous MoS₂/TiO₂photocatalytic electrode.Through the photoelectric performance characterization,it was confirmed that CQDswas successfully loaded on MoS₂/TiO₂,The MoS₂/TiO₂/CQDselectrode was successfully prepared and has better photoelectric catalytic activity.MoS₂/TiO₂/CQDswas used for the degradation of3-chlorophenol simulated wastewater,and the effects of different applied bias voltage,p H value,and different pollutant concentration on the removal rate were studied.The results showed that the MoS₂/TiO₂/CQDsphotoelectric catalytic electrode had high reaction rate under acidic conditions,and the photoelectric catalytic synergy has a significant effect on the degradation of 3-chlorophenol wastewater.It is suitable for low-concentration 3-chlorophenol wastewater and has good stability.It is concluded that the main active species in the degradation process of 3-chlorophenol is O^2·-by adding different capture agents.