Degradation of Humic Acid by TiO2/Graphene Photocatalytic Materials
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
9 9
Page:
83-88
Column:
Date of publication:
2020-05-01
- Abstract:
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To solve the problems of difficult to recycle and poor stability of nitrogen doped TiO2/reduced graphene oxide nanoparticles (NTG) via hydrothermal method, nitrogen-doped TiO2 nanotubes/ reduced graphene oxide composite film (ENTG) was prepared by electrochemical method, and the properties of the material were characterized by FESEM, XRD and XPS. The diameter of TiO2 nanotube (TNT) in ENTG was approximately 167 nm, and its length was about 6 μm. The crystal form of TiO2 was anatase, and nitrogen entered the TiO2 lattice in the form of interstitial doping. The photodegradation of humic acid (HA) by different catalysts (TNT, N/TNT, NTG and ENTG) was explored.When HA concentration was low, the degradation processes of HA by the four photocatalysts all conformed to the quasi-first-order kinetic model. No matter in ultraviolet region or visible region, ENTG exhibited better photocatalytic performance than the other three catalysts, and the removal performance of HA in the visible region was better. Furthermore, the photocatalytic degradation repetitive test indicated that the separation and recovery of ENTG were convenient and the catalytic stability was good.ENTG is a promising photocatalyst in the field of drinking water treatment.
Last Update:
2020-05-01