G-C3N4/ TiO2 coating with light-control and antibacterial functions and preparation method thereof
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A g-c3n4 coating technology, applied in coating, medical science, tissue regeneration, etc., to achieve the effect of dense coating, high bonding strength and good biological activity
Active Publication Date: 2019-10-15
SOUTHWEST UNIVERSITY
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[0010] The object of the present invention is to propose a kind of g-C with light-controlled antibacterial function aiming at the above-mentioned deficiencies of artificial implant materials. 3 N 4 /TiO 2 A coating and a preparation met
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[0029] Example 1
[0030] (1) First choose TC4 titanium alloy.
[0031] (2) Pretreatment: The titanium-based alloy implant material is polished step by step from coarse sand to fine sand using metallographic sandpaper with the numbers 600#, 800#, 1000#, and then acetone, 70% alcohol, and distilled water Ultrasonic cleaning, dry for later use.
[0032] (3) Chemical polishing: configure 40 ml polishing solution containing hydrofluoric acid and concentrated nitric acid, the volume ratio is: H 2 O: HF: HNO 3 =5:1:4; Put the TC4 titanium alloy in a chemical polishing solution for 3 minutes.
[0033] (4) Advanced oxidation: configure 5 wt% hydrogen peroxide solution, put the TC4 titanium alloy into the oxidation solution, and irradiate the outer surface with a 254nm ultraviolet lamp. The oxidation treatment time is 4 hours.
[0034] (5) Hydrothermal synthesis treatment: hydrothermally synthesize the advanced oxidized TC4 titanium alloy with a sodium hydroxide solution with a concentration of...
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[0037] Example 2
[0038] (1) First choose TC4 titanium alloy.
[0039] (2) Pretreatment: The titanium-based alloy implant material is polished step by step from coarse sand to fine sand using metallographic sandpaper with the numbers 600#, 800#, 1000#, and then acetone, 70% alcohol, and distilled water Ultrasonic cleaning, dry for later use.
[0040] (3) Chemical polishing: configure 40 ml polishing solution containing hydrofluoric acid and concentrated nitric acid, the volume ratio is: H 2 O: HF: HNO 3 =5:1:4; Put the TC4 titanium alloy in a chemical polishing solution for 3 minutes.
[0041] (4) Advanced oxidation: configure 5 wt% hydrogen peroxide solution, put TC4 titanium alloy into the oxidation solution, and irradiate the outer surface with a 254nm ultraviolet lamp, and the oxidation treatment time is 3 h.
[0042] (5) Hydrothermal synthesis treatment: The high-grade oxidized titanium alloy bone nail is subjected to hydrothermal reaction with a sodium hydroxide solution with a ...
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Abstract
The present invention relates to a g-C3N4/ TiO2 coating with light-control and antibacterial functions and a preparation method thereof. The light-control antibacterial coating consists of TiO2 with athree-dimensional network structure and graphite-like phase carbon nitride (g-C3N4) deposited on the surface of the TiO2. The g-C3N4/ TiO2 coating with a three-dimensional network structure is combined with the surface of a titanium or titanium alloy substrate, rod-shaped nano-array sodium titanate is constructed on the surface of the substrate by a hydrothermal synthesis method, the nano-array sodium titanate is converted into titanium dioxide by a chemical vapor deposition technology, and the g-C3N4 is deposited at the same time. The preparation method comprises the following steps of: firstly, acquiring a rod-shaped nano-array sodium titanate biological coating on the surface of the substrate by adopting a hydrothermal synthesis method; and then converting the coating into titanium dioxide by using a high-temperature annealing technology, taking melamine as a raw material, and depositing g-C3N4 on the surface of the titanium dioxide through a chemical vapor deposition technology soas to finally obtain the g-C3N4/ TiO2 coating with the light-control and antibacterial functions.
Description
technical field [0001] The invention relates to a g-C with light-controlled antibacterial function 3 N 4 / TiO 2 The coating and its preparation method, especially relate to a sodium titanate bioceramic coating with titanium and its alloys as the base material, which is controlled to grow nanorod array structure on its surface by hydrothermal synthesis method. Using high-temperature annealing process and chemical vapor deposition technology to transform sodium titanate nanorod array structure into TiO with g-C3N4 nanosheets deposited on the surface 2 A coating with a three-dimensional network structure and a preparation method thereof belong to the technical field of biomedical materials. Background technique [0002] Titanium and titanium alloys have excellent biocompatibility, high strength, toughness and corrosion resistance. They are the main raw materials for mid-to-high-end surgical implants commonly used in current clinical treatment. They can be used as denture imp...
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