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One-dimensional cadmium sulfide/two-dimensional titanium carbide composite photocatalyst and preparation method and application thereof

A two-dimensional titanium carbide and cadmium sulfide technology, applied in the field of photocatalytic materials, can solve problems such as photocatalytic activity limitations, achieve good cycle performance, be conducive to sustainable development, and promote the effect of separation

Active Publication Date: 2020-02-11
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its photocatalytic activity is limited due to the rapid recombination of electron-hole pairs.

Method used

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  • One-dimensional cadmium sulfide/two-dimensional titanium carbide composite photocatalyst and preparation method and application thereof
  • One-dimensional cadmium sulfide/two-dimensional titanium carbide composite photocatalyst and preparation method and application thereof
  • One-dimensional cadmium sulfide/two-dimensional titanium carbide composite photocatalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 Preparation of one-dimensional cadmium sulfide nanowire photocatalyst

[0032] Add 0.3 g / mL sodium diethyldithiocarbamate aqueous solution dropwise in 16.7 g / mL cadmium chloride solution by volume ratio 1:1 to obtain cadmium diethyldithiocarbamate; Cadmium thiocarbamate was added to ethylenediamine to form a solution with a concentration of 0.03 g / mL, then added to a polytetrafluoroethylene lining and sealed in a stainless steel autoclave, and the autoclave was placed in a 180°C Keep in the oven for 24 h, after cooling to room temperature, collect the bright yellow precipitate in the lining, wash with absolute ethanol and deionized water for 4 times (to the ion concentration in the washing solution <10 ppm), and store at 60 °C Dry in oven for 12h to obtain one-dimensional cadmium sulfide nanowires;

Embodiment 2

[0033] Example 2 Preparation of two-dimensional titanium carbide nanosheet photocatalyst

[0034] Add 1 g of titanium aluminum carbide powder into a plastic bottle containing 1 g of lithium fluoride, 3 mL of water, and 7 mL of hydrochloric acid in 5-6 times, and then stir for 24 h in an oil bath at 35 °C. The obtained product was washed several times until the pH value of the washing solution was close to neutral (6~7). The washed product was dispersed in 200 mL of water, ultrasonically dispersed for 60 min, and then centrifuged at 3500 rpm for 60 min to collect dark green A certain amount of deionized water was added to prepare a 1 g / L aqueous solution of two-dimensional titanium carbide nanosheets.

Embodiment 3

[0035] Example 3 Preparation of one-dimensional cadmium sulfide / two-dimensional titanium carbide (CdS-MX) composite photocatalyst

[0036]The one-dimensional cadmium sulfide (CdS) nanowires prepared in Example 1 were ultrasonically dispersed in deionized water, and then added dropwise to the aqueous solution of two-dimensional titanium carbide (MXene) nanosheets prepared in Example 2 (the mass ratio of MXene to CdS was 5% ), and stirred for 30-60 min, after suction filtration, deionized water washing and vacuum drying, the CdS-5%MX composite photocatalyst was obtained.

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Abstract

The invention discloses a one-dimensional cadmium sulfide / two-dimensional titanium carbide composite photocatalyst and a preparation method thereof. The preparation method comprises the following steps: preparing a one-dimensional cadmium sulfide nanowire by adopting a solvothermal method, preparing a two-dimensional titanium carbide nanosheet by adopting a lithium fluoride / hydrochloric acid etching method, and then preparing the one-dimensional cadmium sulfide / two-dimensional titanium carbide composite photocatalyst by adopting a simple electrostatic self-assembly method. According to the method, preparation process is simple, reaction conditions are mild, and precious metal with high cost is not used. Compared with a one-dimensional cadmium sulfide nanowire material, the obtained composite photocatalyst has higher performance in photocatalytic conversion of ethanol into 1,1-diethoxyethane, and can generate hydrogen at the same time; so the composite photocatalyst has wide applicationprospects in the fields of development of clean energy and photocatalytic selective organic synthesis, and meets the requirements of green chemistry.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials, and in particular relates to a one-dimensional cadmium sulfide / two-dimensional titanium carbide composite photocatalyst and its preparation method and application. Background technique [0002] Since the industrial revolution, environmental pollution and energy crisis have become two important problems that people face. Therefore, the development of new green and sustainable energy to alleviate people's dependence on non-renewable energy has become the focus of attention in recent years. Hydrogen energy is widely regarded as an ideal clean energy source. So far, a large number of studies have been devoted to using photocatalytic technology to realize efficient photolysis of water to produce hydrogen under the condition of introducing a sacrificial agent. However, this strategy not only greatly wastes the oxidation ability of photogenerated holes, but also may release carbon dioxide gas, ...

Claims

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Application Information

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IPC IPC(8): B01J27/22B01J27/04C07C41/50C07C43/303C01B3/22
CPCB01J27/22B01J27/04C07C41/50C07C43/303C01B3/22B01J35/39B01J35/23
Inventor 徐艺军李婧宇
Owner FUZHOU UNIV
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