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A cadmium complex single crystal with catalytic photodegradation of methylene blue and its preparation method

A technology of cadmium complexes and methylene blue, which is applied in the direction of cadmium organic compounds, organic compound/hydride/coordination complex catalysts, chemical instruments and methods, etc., can solve the problem of easy recombination of photogenerated electrons and holes, low utilization rate of visible light, Low quantum efficiency and other problems, to achieve the effect of simple process, stable photocatalytic degradation dye performance, and high yield

Inactive Publication Date: 2017-03-22
ANYANG NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing problems of most of the photocatalysts are: (1) the energy gap is too wide, and can only respond to the ultraviolet light region of less than 5% of solar radiation, and the utilization rate of 47% of visible light in relative solar energy is very low; (2) photogenerated electrons- Holes are easy to recombine, and the quantum efficiency is very low

Method used

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  • A cadmium complex single crystal with catalytic photodegradation of methylene blue and its preparation method
  • A cadmium complex single crystal with catalytic photodegradation of methylene blue and its preparation method
  • A cadmium complex single crystal with catalytic photodegradation of methylene blue and its preparation method

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Embodiment 1

[0020] Embodiment 1: Synthesis of cadmium complex single crystal catalyst

[0021] Dissolve cadmium acetate dihydrate (11 mg, 0.04 mmol), ligand L phthalic acid (3 mg, 0.02 mmol), bpmb (6 mg, 0.02 mmol) in a mixed solvent of methanol (2 mL) and water (2 mL), and put Put it into a hard glass tube and seal the tube. Under hydrothermal conditions, keep the temperature at 165°C for three days, and then drop to room temperature under natural conditions to obtain colorless blocky crystals. The molecular formula of the colorless blocky crystals is: [Cd 2 (L) 2 (bpmb)], namely cadmium complex single crystal catalyst, the yield is 55%.

[0022] Under the microscope, single crystals of appropriate size are selected for X-ray diffraction experiments at room temperature. On a Bruker SmartApex-II CCD diffractometer, Mo–K α Rays by to collect diffraction data. Data restoration was performed with the Bruker SAINT program. Diffraction data for partial structures were corrected for ...

Embodiment 2

[0029] Example 2: Specific application of the cadmium complex catalyst of the present invention in photocatalytic degradation of dyes

[0030] The concentration in 50mL is about 4×10 -5 Add 20 mg of the colorless blocky crystals prepared in Example 1 to the mol / L methylene blue aqueous solution, and stir for 30 minutes in a dark environment. After the adsorption-desorption equilibrium is reached, 350W ultraviolet light from a xenon lamp is used for top irradiation, and the distance between the light source and the top surface of the reactor is 10 cm. Use a Varian UV-Vis spectrometer to detect, react with light continuously for 2 hours, and manually inject samples every half an hour for detection. After 2 hours, the methylene blue is basically completely degraded. See Figure 4 .

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Abstract

The invention belongs to the field of coordination chemistry and photocatalysis, and discloses a cadimium complex monocrystal capable of catalyzing photodegradation of methylene blue, and a preparation method thereof. The chemical formula of the cadimium complex monocrystal is [Cd<2>(L)<2>(bpmb)], wherein H<2>L is used for representing phthalic acid, bpmb is used for representing 1,4-di(pyridine-3-methoxyl)benzene; the cadimium complex monocrystal belongs to monoclinic system, space group is C2 / c, a=19.490(4) angstroms, b=9.985(2) angstroms, c=15.540(3) angstroms, beta=96.25(3)DEG, V=3006.4(10) angstrom<3>. The structural simple formula is disclosed in the invention. The cadimium complex monocrystal photocatalyst possesses stable and high efficiency dye photocatalytic degradation performance at normal temperature, and especially photocatalytic degradation performance on methylene blue. The preparation method is simple; and yield is high, and is 51% or higher.

Description

technical field [0001] The invention relates to the fields of coordination chemistry and photocatalysis, in particular to a cadmium complex single crystal capable of catalyzing photodegradation of methylene blue and a preparation method thereof. Background technique [0002] With the rapid development of the dye textile industry, the variety and quantity of dyes are increasing day by day, printing and dyeing wastewater has become one of the key pollution sources of the water system environment. The water quality of printing and dyeing wastewater has complex components, deep color, and large discharge volume. It often contains refractory and toxic organic pollutants, and some are even carcinogenic, mutagenic, and teratogenic organic substances, such as benzene rings, amino groups, and azo groups. Great hazard to the environment and drinking water. Water pollution is becoming more and more serious, even threatening the daily life and living conditions of people in relevant ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F3/08B01J31/22C02F1/32C02F101/38
CPCY02W10/37
Inventor 刘雷雷杜记民石云峰吕允贺余彩霞
Owner ANYANG NORMAL UNIV