nanocomposite mos 2 /ag/tio 2 nts preparation method

Abstract

Nanocomposite MoS 2 / Ag / TiO 2 The preparation method of NTs is based on the titanium mesh as the substrate, using a simple photoreduction method and a hydrothermal method, in TiO 2 In situ growth of integrated MoS on NTs / Ti webs 2 / Ag / TiO 2 NTs. Under visible light (λ≥420 nm) irradiation, 4cm 2 MoS on Titanium Mesh 2 / Ag / TiO 2 The NTs catalyst can basically degrade 100 mL of 10 mg / L tetracycline hydrochloride solution within 2 hours. The advantages of the invention are that the composite material is prepared on the titanium mesh, which solves the problem of catalyst immobilization, is convenient and quick to use, and is easy to recover and reuse, and the catalytic activity is not easy to fail, and it can also be connected to an external circuit, and a bias voltage is applied. Improve the separation efficiency of photogenerated electron-holes, thereby improving its catalytic efficiency.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanocomposite materials, in particular to a kind of in-situ growth of MoS on titanium mesh 2 / Ag / TiO 2 NTs approach and photocatalytic degradation of antibiotic pollutant-tetracycline hydrochloride. Background technique [0002] As a widely studied nano-semiconductor photocatalyst, TiO 2 With the advantages of non-toxic, cheap and easy to obtain, high physical and chemical stability and high photocatalytic activity, it has attracted the attention of many researchers in the environmental field. Among them, TiO grown on titanium sheets by anodic oxidation 2 Nanotubes (TiO 2 Nanotubes, referred to as TiO 2 NTs) have the advantages of large specific surface area, vertical charge transfer, and stability against photocorrosion and chemical corrosion. However, the band gap of TiO2 NTs is 3.2 eV, which can only absorb ultraviolet light in sunlight, and its high photogenerated carrier recombin...

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Problems solved by technology

However, the band gap of TiO2 NTs is 3.2 eV, which can only absorb ultraviolet light in sunlight, and its high photogenerated carrier recombination rate leads to its low photon quantum efficiency, and its catalytic oxidation activity under visible light is not high.

In addition, in the photocatalytic process, the backlight side of the titanium sheet cannot be excited by light, which is not conducive to the formation of TiO 2 The absorption and reflection of light by NTs are prone to scattering and cause the loss of photons

When TiO 2 When the length of NTs exceeds 10 microns, the adhesion on the titanium sheet is weak, and it is easy to fall off and break, and cannot be formed at will, and can only be kept in a flat state, which limits the formation of photocatalytic reaction devices.

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