According to the research conducted by Dong, et al (2015), there is a great potential to enhance the water purification facility with the use of visible-light-responsive photocatalytic technology, it also increases the purification water efficiency to the maximum extent which is very good addition to the methods of unconventional water purifications. In this review, different synthetic strategies which include the modification of traditional photocatalysts via dye sensitization, doping creating heterostructure in addition with traditional photocatalysts sum up the recent progress in the design [2].

        The water treatment related to the photocatalytic degradation of inorganic pollutants, organic compounds along with photocatalytic disinfection has been covered in relation to visible-light-responsive photocatalysts. In treatment of wastewater, visible-light-responsive photocatalysis is getting popular day by day and presumed as a revolutionize technology due to its unique features which attributed to it.  The detailed review about visible-light-responsive photocatalysts which is being used in heterogeneous water treatment has been done in article.  In water treatment field, visible light is being used as a renewable source of energy, and the results are coming very promising in this regard for the sustainable environmental development based on photocatalytic redox reactions [2].

Use of the Continuous-flow photochemistry of Water treatment

        According to the research conducted by Cambie, Bottecchia, Straathof, Hessel, & Noel (2016), photochemistry gets an attention from researchers in industry and in academic record. There are multiple advantages of photochemistry in continuous flow. For getting more efficiency then this will be performed in batch in the form of mesoflow and micro flow system due to beer-Lambert law. The production of the photochemical process is increased by facilitating the flow stability, decreasing in the degree of degradation, and by the constant removal of product. There is the wide range of photochemical transformation which was examined by using ultra-violet rays and visible light. Issues which are raised during the batch of photochemistry are overcoming by the use of continuous-flow micro reactors in photochemical. Uniform irradiation of the entire mixture can be done by providing narrow channel. Many successful examples can be done on lab scale. By reducing the cost makes it economical then this will be able in widespread use in real life example [3].

References of Visible-light-responsive photocatalytic technology of Water treatment