According to research conducted by Lee, Lai, Ngai, & Juan (2016) it is analyzed that Residual dyes is the most important problem about water pollution. Residual dye are obtained from different sources like textile industries, Craft bleaching industries, pulp industries etc.the most  toxic and dangerous to organism is the wide variety of persistent organic pollutants which was present in our natural water resources. Various technologies and techniques has been used for the elimination of these organic particles [8].

        The most advanced technology which is used is zinc oxide (ZnO) photo catalyst. Due its extraordinary characteristics ZnO photo catalyst attracts attention of many researchers. ZnO photo catalyst has high efficiency due to maximize photo absorption and minimize loss of electron. For getting more improvement in heterogeneous photo catalysis there will be the use of UV rays. On the other hand metal doping and binary photocatalyst system become the favourite research of various scientists. By changing the preparation method there will be the change in the properties’ of metal doping which was further used in ZnO photo catalyst [8].

Nanoporous carbon particles of Water treatment

        According to the research conducted by Torad, et al. (2014) it is noticed that for getting high catalytic activity and strong magnetic respose then metal nanoparticles will be use.by reacting  magnetic cobalt (Co)  react with nanoporous carbon particles for synthesizing nanoparticles.this can be done by carbonation of zeolitic imidazolate framework-67 (ZIF-67) crystals. when the carbonation can be don, careshould be taken that shape of ZIF-67 should not be change [9].

        Co nanoparticles show a strong magnetic response because it have excellent absorption and it also high suface area, it also shows fast diffusion of methylene blue(MB)nanoporous carbon (NPC) materials have following properties like: narrow pore-size distribution, excellent chemical resistance, high specific area. There is wide range of research fields in NPC material: fields are the following: such as energy storage, absorption, separation, and energy conversion.  Now we are expecting that there will be the copperative effect between the nanoparticles and mesostructures [9].

References  OF Zinc oxide (ZnO) photocatalyst of Water treatment