Abstract
This research aims to treat the refractory nitrobenzene wastewater in the industrial water treatment industry with modified supported TiO2, and to study its influence on the treatment effect.Experiments have found that by preparing Fe and N co-doped TiO2/GF supported catalysts, it has better catalytic performance. Under the same conditions, Fe and N co-doped TiO2/GF can degrade nitrobenzene wastewater better than single Doped with Fe-TiO2/GF and N-TiO2/GF, the removal rates of nitrobenzene and COD are as high as 97.2% and 92.5%, respectively.The Fe and N co-doped TiO2/GF catalyst overcomes the agglomeration of traditional powdered TiO2 in solution, and has a good removal effect on nitrobenzene wastewater.
Highlights
Photocatalysis is a new advanced oxidation technology with simple equipment, mild conditions, and obvious effects of oxidizing and degrading organic matter
A large number of studies have shown that anatase is the most active crystal type, and its energy band gap energy (Eg) is 3.2eV, which is equivalent to the photon energy with a wavelength of 387.5nm[3].Frank and Bard[4] pioneered the application of semiconductor materials to sewage treatment, and cyanate oxide used TiO2 as a photocatalyst.TiO2 photocatalytic oxidation technology is considered to be one of the most promising photocatalytic materials at this stage [5]
In order to solve the harmful effects of nitrobenzene wastewater on people's production and life, domestic and foreign scholars have conducted a lot of research on the treatment methods of nitrobenzene wastewater.Shang Xiaoyuan [6] used the biodegradation method to study the granulation of aerobic sludge and the removal effect of granular sludge on nitrobenzene wastewater
Summary
Photocatalysis is a new advanced oxidation technology with simple equipment, mild conditions, and obvious effects of oxidizing and degrading organic matter. It can convert organic matter into water and carbon dioxide by using the energy of sunlight, which can meet environmental protection requirements.[1]Inorganic metal oxide semiconductor materials are commonly used photocatalysts, and TiO2 has become an ideal photocatalyst due to its stable chemical properties, nontoxicity, and low cost. This study mainly studies the preparation conditions of Fe and N co-doped TiO2/GF photocatalysts and the process conditions for the treatment of nitrobenzene wastewater, which provides a basis for accelerating the industrial use of photocatalytic oxidation technology
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