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Titanium dioxide antibacterial and formaldehyde-removing composite material and its preparation method and application

A titanium dioxide and composite material technology, applied in chemical instruments and methods, botanical equipment and methods, separation methods, etc., can solve problems such as poor antibacterial and formaldehyde removal effects, reduce the composite probability, promote transmission, and inhibit Rhizopus effect of growth

Active Publication Date: 2018-08-07
ZHEJIANG JINDING INTEGRATED CEILING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a titanium dioxide antibacterial and formaldehyde-removing composite material to solve the problem of poor antibacterial and formaldehyde-removing effects of existing modified titanium dioxide photocatalysts

Method used

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  • Titanium dioxide antibacterial and formaldehyde-removing composite material and its preparation method and application
  • Titanium dioxide antibacterial and formaldehyde-removing composite material and its preparation method and application
  • Titanium dioxide antibacterial and formaldehyde-removing composite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) 0.2g TiO 2 (purchased from Sinopharm Chemical Reagent Co., Ltd.) mixed with 10mL of water, and ultrasonically crushed for 30min;

[0033] (2) 0.064g reduced graphene oxide (RGO) was mixed with 15mL water, and ultrasonically crushed for 30min;

[0034] (3) The above two solutions were mixed and ultrasonically crushed for 30 minutes;

[0035] (4) Weigh 1.6g CdCl 2 2.5H 2 O (0.007mol) was added in the mixed solution of step (3), stirred for 30min;

[0036] (5) Weigh 1.7g Na 2 S·9H 2 O (0.007mol) was dissolved in 25mL of water, and then added dropwise to the solution in step (4) to generate CdS.

[0037] (6) Stirring was continued for 2 days.

[0038] (7) centrifuge, extract lower layer solid, wash 3-5 times with water, dry, N 2 Under the atmosphere (the flow rate is 0.5mL / min), calcined at 400°C for 4 hours to obtain TiO 2 -RGO-CdS.

Embodiment 2

[0040] (1) 0.2g TiO 2 (purchased from Sinopharm Chemical Reagent Co., Ltd.) mixed with 10mL of water, and ultrasonically crushed for 30min;

[0041] (2) 0.09g reduced graphene oxide was mixed with 15mL water, and ultrasonically crushed for 30min;

[0042] (3) The above two solutions were mixed and ultrasonically crushed for 30 minutes;

[0043] (4) Weigh 1.6g CdCl 2 2.5H 2 O (0.007mol) was added in the mixed solution of step (3), stirred for 30min;

[0044] (5) Weigh 1.7g Na 2 S·9H 2O (0.007mol) was dissolved in 25mL water, and then added dropwise to the solution of step (4) to generate CdS;

[0045] (6) Continue stirring for 2 days;

[0046] (7) centrifuge, extract lower layer solid, wash 3-5 times with water, dry, N 2 Under the atmosphere (the flow rate is 0.5mL / min), calcined at 400°C for 4 hours to obtain TiO 2 -RGO-CdS.

Embodiment 3

[0048] (1) 0.2g TiO 2 (purchased from Sinopharm Chemical Reagent Co., Ltd.) mixed with 10mL of water, and ultrasonically crushed for 30min;

[0049] (2) 0.037g reduced graphene oxide was mixed with 15mL water, and ultrasonically crushed for 30min;

[0050] (3) The above two solutions were mixed and ultrasonically crushed for 30 minutes;

[0051] (4) Weigh 1.6g CdCl 2 2.5H 2 O (0.007mol) was added in the mixed solution of step (3), stirred for 30min;

[0052] (5) Weigh 1.7g Na 2 S·9H 2 O (0.007mol) was dissolved in 25mL of water, and then added dropwise to the solution in step (4) to generate CdS.

[0053] (6) Stirring was continued for 2 days.

[0054] (7) centrifuge, extract lower layer solid, wash 3-5 times with water, dry, N 2 Under the atmosphere (the flow rate is 0.5mL / min), calcined at 400°C for 4 hours to obtain TiO 2 -RGO-CdS.

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Abstract

The invention discloses a titanium dioxide antibacterial and formaldehyde-removing composite material and its preparation method and application. In terms of weight percentage, the composition of the titanium dioxide antibacterial and formaldehyde-removing composite material is: titanium dioxide 10%-20%; reduced graphene oxide (RGO) 1%‑10%; Cadmium Sulfide 70%‑89%. The preparation method includes: (1) providing an aqueous solution containing titanium dioxide, reduced graphene oxide, and cadmium sulfide; (2) mixing the three aqueous solutions and centrifuging to obtain a solid phase, which is washed, dried, and roasted to obtain The titanium dioxide antibacterial and formaldehyde-removing composite material. The invention also discloses a coating comprising the titanium dioxide antibacterial and formaldehyde-removing composite material. The invention combines reduced graphene oxide, cadmium sulfide and titanium dioxide, utilizes the good electrical conductivity of reduced graphene oxide, promotes the transmission of photogenerated electrons, reduces the recombination probability of photogenerated electrons and holes, and improves the antibacterial rate and formaldehyde removal rate.

Description

technical field [0001] The invention relates to an antibacterial and formaldehyde-removing material, in particular to a titanium dioxide antibacterial and formaldehyde-removing composite material as well as its preparation method and application. Background technique [0002] In 1972, Japan's Fujishima et al. published "TiO 2 The article "Photolysis of water on the electrode" opened the prelude to photocatalytic oxidation technology. Among many photocatalysts, TiO 2 It has become the most commonly used photocatalyst because of its high catalytic ability, good chemical stability, good acid and alkali resistance, non-toxicity, and low price. [0003] Due to TiO 2 Photocatalysts have a wide band gap (3.2eV) and can only be excited by short-wavelength ultraviolet light (λ<387nm), while ultraviolet light (below 400nm) only accounts for 5% of the visible light spectrum, and visible light with a wavelength of 400-750nm accounted for 45%, so the utilization rate of visible lig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/18B01J23/06B01D53/86B01D53/62A01N59/16A01P1/00C09D5/14
Inventor 朱长俊李雷汪海东宋利林颖马桑桑王月松俞戈凤严春浩
Owner ZHEJIANG JINDING INTEGRATED CEILING CO LTD