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Study on photocatalytic and mechanical properties of C3N5/NH2-MIL-125（Ti） modified concrete mortar
Received date: 2024-04-09
Online published: 2025-01-24
In order to solve the environmental pollution caused by organic dyes and automobile exhaust NO x，C3N5/NH2-MIL-125（Ti） composite photocatalytic materials were prepared by solvothermal method.The crystal morphology，elemental composition，spectral absorption，photoelectron-hole recombination and charge transfer resistance of the composites were characterized by X-ray diffraction（XRD），scanning electron microscopy（SEM），transmission electron microscopy（TEM），X-ray photoelectron spectroscopy（XPS），ultraviolet-visible diffuse reflectance spectroscopy（UV-vis DRS），steady-state fluorescence spectroscopy（PL） and electrochemical impedance spectroscopy（EIS）.It was applied to the photocatalytic degradation of dye rhodamine B（RhB）.The concrete mortar was modified by C3N5/NH2-MIL-125（Ti），which was applied to the photocatalytic degradation of automobile exhaust NO x .The results showed that the XPS characterization proved the successful construction of the heterojunction between C3N5 and NH2-MIL-125（Ti），realized the efficient separation of photoelectron-holes，broadened the spectral absorption range，and significantly reduced the charge transfer resistance，showing good photocatalytic activity，which was obviously better than that of single C3N5 and NH2-MIL-125（Ti）.The degradation rate of RhB reached 98.5% within 60 min under visible light irradiation，and it still showed good photocatalytic activity after 5 cycles.A small amount of doping of C3N5/NH2-MIL-125（Ti） made ordinary concrete mortar exhibited NO x degradation activity and was beneficial to the improvement of compressive strength of mortar concrete.
LIU Guangming . Study on photocatalytic and mechanical properties of C3N5/NH2-MIL-125（Ti） modified concrete mortar[J]. Inorganic Chemicals Industry, 2025 , 57(1) : 120 -128 . DOI: 10.19964/j.issn.1006-4990.2024-0201
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