Abstract：
:Advanced oxidation process involves production of hydroxyl radical for industrial wastewater treatment. This method is based on the irradiation of UV light to photocatalysts such as TiO2 and ZnO for photodegradation of pollutant. UV light is used for irradiation in photocatalytic process because TiO2 has a high band gap energy which is around 3.2 eV. There can be shift adsorption to visible light by reducing the band gap energy to below 3.2 eV. Doped catalyst is one of the means to reduce band gap energy. Different methods are used for doped catalyst which uses transition metals and titanium dioxide. The band gap energy of three types of transition metals Fe, Cd and Co after being doped with TiO2, are around 2.88 ev, 2.97ev and 2.96 ev, respectively which are all below TiO2 energy. Some of the transition metals change the energy level to below 3.2 eV and the adsorption shifts to visible light for degradation of industrial pollutant after being doped with titanium dioxide. This paper aims at providing a deep insight into advanced oxidation processes, photocatalysts and their applications in wastewater treatment, doping processes and the effects of operational factors on photocatalytic degradation.
journal_name
J Environ Managejournal_title
Journal of environmental managementauthors
Khaki MRD,Shafeeyan MS,Raman AAA,Daud WMAWdoi
10.1016/j.jenvman.2017.04.099subject
Has Abstractpub_date
2017-08-01 00:00:00pages
78-94issue
Pt 2eissn
0301-4797issn
1095-8630pii
S0301-4797(17)30457-7journal_volume
198pub_type
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