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Photocatalytic cement mortar containing graphite phase carbon nitride

A technology of graphite phase carbon nitride and cement mortar, which is applied in the field of building materials to achieve the effect of improving strength

Inactive Publication Date: 2018-10-02
SHANDONG JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After searching a large number of patents and literature data, the polymer semiconductor material-graphite carbon nitride (g-C 3 N 4 ) to prepare a patent with photocatalytic cement mortar has not yet been reported

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  • Photocatalytic cement mortar containing graphite phase carbon nitride

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Graphite carbon nitride (g-C 3 N 4 ) Preparation of photocatalyst

[0019] (1) Weigh 10g of urea, cyanamide, dicyandiamide, and melamine respectively, and place them in four 50ml porcelain crucibles with lids. At the same time, place it in a muffle furnace, set the heating rate at 10°C / min, raise it to 550°C, and keep it warm for 2h.

[0020] (2) Grinding the collected product when the furnace is cooled to room temperature to obtain graphite phase carbon nitride with a particle size of 300nm-500nm, which is set aside.

Embodiment 2

[0022] Preparation of Photocatalytic Cement Mortar Containing Graphite Phase Carbon Nitride

[0023] In parts by weight (Kg): 1 part of cement, 0.03 part of graphite carbon nitride, 0.05 part of polymer, 3 to 4 parts of construction sand, 0.035 part of admixture (wherein the admixture is from Shandong Jiangtai Building Materials Technology Co., Ltd. Special admixture for mortar produced by the company).

[0024] The photocatalytic cement mortar containing graphite phase carbon nitride is prepared by mixing graphite phase carbon nitride with cement, construction sand, polymer, and admixture with water according to the set component content by weight, and stirring.

Embodiment 3

[0026] The photocatalytic functional cement mortar is prepared by using red mud, which is suitable for engineering plastering construction.

[0027] With g-C prepared by the method of embodiment 1 3 N 4 For the raw material, the specific raw material mixing ratio is shown in Table 1.

[0028] Catalyst performance evaluation is achieved by the following devices:

[0029] Reactor: airtight ventilation pipe, filled with 2 pieces of cement mortar in the middle, and an ultraviolet lamp is installed on the top of the device. Nitric oxide is used as the simulated gas pollutant, the gas flow rate is 1.00L / min, the temperature is room temperature, and the air humidity is 50±5%. Every 30 minutes, collect gas samples at the inlet and outlet sampling points, test the concentration of pollutants, and calculate the photocatalytic efficiency of photocatalytic cement mortar according to the following formula:

[0030]

[0031] Among them, C 0 is the inlet concentration, C 1 is the ga...

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Abstract

The invention discloses photocatalytic cement mortar containing graphite phase carbon nitride. The photocatalytic cement mortar comprises the following components in part by weight: 1 part of cement,0.01-0.05 part of graphite phase carbon nitride, 0.03-0.07 part of a polymer, 2-5 parts of construction sand and 0.025-0.035 part of an admixture with thickening, water holding and plasticity-stabilizing effects. The photocatalytic cement mortar is prepared by mixing and stirring the graphite phase carbon nitride, the cement, the construction sand, the polymer, the admixture and water. The photocatalytic cement mortar disclosed by the invention has the benefits that the graphite phase carbon nitride is utilized for absorbing blue and violet light in a solar spectrum to generate photocatalyticreaction, so that nitrogen oxides and volatile organic compounds (VOC) in an atmospheric environment are catalyzed and removed in real time, and the function of purifying the atmosphere is realized. Apreparation method of the photocatalytic cement mortar disclosed by the invention is simple in steps and has popularization and utilization values in engineering construction.

Description

technical field [0001] The invention belongs to the technical field of building materials. Specifically relates to a photocatalytic cement mortar containing graphite phase carbon nitride. Background technique [0002] The photocatalytic materials used in the existing cement-based cementitious composite materials are mainly titanium dioxide materials. Using cement-based cementitious materials as the carrier, it is applied to the surface of construction projects. Under the action of sunlight, it can decompose organic pollutants in real time, purify the atmospheric environment and realize the self-cleaning effect of the building surface. Therefore, photocatalytic cement-based cementitious composites have been known and paid attention to by more and more people in the construction field. In addition, TiO 2 When mixed into cement concrete as a pavement material, when the pollution tail gas emitted by land mobile sources comes into contact with the pavement material, the solar ...

Claims

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Application Information

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IPC IPC(8): C04B28/00C01B21/082B01J27/24
CPCC01B21/0605C04B28/00B01J27/24B01J35/39C04B22/00C04B14/06C04B24/24
Inventor 庞来学冯正义孙海波唐新德王晓英史红陈建中
Owner SHANDONG JIAOTONG UNIV
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