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Catalyst for catalytic removal of formaldehyde and carbon monoxide and preparation method thereof

A carbon monoxide and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of insufficient Pt dispersion, limited utilization of light efficiency, insufficient specific surface area, etc., and achieve strong visible light. Catalytic performance, the effect of promoting electron-hole separation, and improving oxidative ability

Active Publication Date: 2022-05-17
NINGBO FOTILE KITCHEN WARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the catalyst utilizes CeO 2 As a carrier, g-C3N4 is compounded to produce a heterojunction, which improves the photocatalytic oxidation ability to a certain extent, but g-C3N4 / CeO 2 As a carrier, the specific surface area is not large enough, the dispersion of Pt is not good enough, and the utilization of light efficiency is also limited
[0008] Another example is "a mixed crystal TiO 2 / g-C3N4 Nano Hollow Tube Composite Material and Its Preparation Method", the catalyst only uses TiO 2 Photocatalytic Oxidative Degradation of Formaldehyde by / g-C3N4 with Limited Catalytic Ability

Method used

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  • Catalyst for catalytic removal of formaldehyde and carbon monoxide and preparation method thereof
  • Catalyst for catalytic removal of formaldehyde and carbon monoxide and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0033] The catalyst of this embodiment is Pt / Ce-TiO 2 / g-C3N4, that is, Pt loaded Ce-TiO 2 / g-C3N4, Pt as the active component, Ce-TiO 2 / g-C3N4 as carrier, carrier Ce-TiO2 / g-C3N4 is Ce-doped TiO 2 And complex in g-C3N4. Among them, the loading amount of Pt is 0.6wt%, and the balance is the carrier Ce-TiO 2 / g-C3N4; Ce-TiO 2 / g-C3N4: Ce / TiO 2 The mass ratio is 1.5wt%, TiO 2 / g-C3N4 mass ratio is 0.3.

[0034] The preparation method of the catalyst of the present embodiment is as follows:

[0035] (1) Dissolve tetrabutyl titanate in absolute ethanol, stir until dissolved at room temperature, then ultrasonically disperse g-C3N4 (purchased from Sinopharm Chemical Reagent Co., Ltd.) in the above solution, and mix well to obtain solution B ;

[0036] (2) dissolving cerium nitrate, acetic acid and deionized water in ethanol, stirring to obtain solution C;

[0037] (3) Add solution C dropwise to solution B in a stirring state, and keep stirring until a sol is formed, leave...

Embodiment 2

[0042] The catalyst of this embodiment is Pt / Ce-TiO 2 / g-C3N4, that is, Pt loaded Ce-TiO 2 / g-C3N4, carrier Ce-TiO 2 / g-C3N4 is Ce-doped TiO 2 And complex in g-C3N4. Among them, the loading amount of Pt is 0.6wt%, and the balance is the carrier Ce-TiO 2 / g-C3N4; Ce-TiO 2 / g-C3N4: Ce / TiO 2 The mass ratio is 1.5wt%, TiO 2 / g-C3N4 mass ratio is 0.3.

[0043] The preparation method of the catalyst of the present embodiment is as follows:

[0044] (1) Dissolving tetrabutyl titanate in absolute ethanol, stirring at room temperature until dissolved, then ultrasonically dispersing g-C3N4 in the aforementioned solution, and mixing uniformly to obtain solution B;

[0045] (2) dissolving cerium nitrate, acetic acid and deionized water in ethanol, stirring to obtain solution C;

[0046] (3) Add solution C dropwise to solution B in a stirring state, and keep stirring until a sol is formed, leave the resulting sol at room temperature for 24 hours to obtain a gel, and dry the obtain...

Embodiment 3

[0050] The catalyst of this embodiment is Pt / Ce-TiO 2 / g-C3N4, that is, Pt loaded Ce-TiO 2 / g-C3N4, carrier Ce-TiO 2 / g-C3N4 is Ce-doped TiO 2 And complex in g-C3N4. Among them, the loading amount of Pt is 0.6wt%, and the balance is the carrier Ce-TiO 2 / g-C3N4; Ce-TiO 2 / g-C3N4: Ce / TiO 2 The mass ratio is 1.5wt%, TiO 2 / g-C3N4 mass ratio is 0.3.

[0051] The preparation method of the catalyst of the present embodiment is as follows:

[0052] (1) Dissolving tetrabutyl titanate in absolute ethanol, stirring at room temperature until dissolved, then ultrasonically dispersing g-C3N4 in the aforementioned solution, and mixing uniformly to obtain solution B;

[0053] (2) dissolving cerium nitrate, acetic acid and deionized water in ethanol, stirring to obtain solution C;

[0054] (3) Add solution C dropwise to solution B in a stirring state, and keep stirring until a sol is formed, leave the resulting sol at room temperature for 24 hours to obtain a gel, and dry the obtain...

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Abstract

The present invention relates to a kind of catalyst that is used for catalytic removal formaldehyde and carbon monoxide and preparation method thereof, and the general formula of described catalyst is A / Ce-TiO 2 / g‑C3N4; where A is one of Pt, Pd, Au, and A is a noble metal; where the loading of A is 0.1-1wt%, and the balance is Ce‑TiO 2 / g‑C3N4; Ce / TiO 2 The mass ratio of TiO is 0.3-3%; TiO 2 The mass ratio of / g-C3N4 is 0.1-2. The catalyst of the present invention is assisted by visible light, CeTiO 2 / g‑C3N4 composite support has high photocatalytic efficiency, while the presence of an appropriate amount of Ce significantly promotes the dual active sites to generate highly oxidative reactive oxygen species for indoor oxidative decomposition of formaldehyde and CO, thereby obtaining high formaldehyde and CO High decomposition rate and high catalytic stability; even under the condition of high air flow rate, the catalyst has extremely high catalytic efficiency.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, and in particular relates to a catalyst for catalytically removing formaldehyde and carbon monoxide and a preparation method thereof. Background technique [0002] Both formaldehyde and carbon monoxide are the main indoor air pollutants, which have serious harm to the human body. The main hazard of formaldehyde is the irritation to the skin and mucous membranes. When formaldehyde reaches a certain concentration indoors, people will feel uncomfortable, greater than 0.08mg / m 3 High formaldehyde concentrations can cause red eyes, itchy eyes, throat discomfort or pain, hoarseness, sneezing, chest tightness, wheezing, dermatitis, etc. [0003] Carbon monoxide is a highly toxic pollutant to the blood and nervous system. Carbon monoxide in the air enters the human blood through the respiratory system and combines with hemoglobin in the blood to form a reversible conjugate. The combination...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01D53/72B01D53/62B01D53/86
CPCB01J27/24B01D53/864B01D53/8668Y02A50/20
Inventor 韩晨阳郭国良汪鹤张彬彬郑军妹霍彦强
Owner NINGBO FOTILE KITCHEN WARE CO LTD
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