CN104226290A - TiO2/RGO aerogel, and preparation method and application of TiO2/RGO aerogel - Google Patents
TiO2/RGO aerogel, and preparation method and application of TiO2/RGO aerogel Download PDFInfo
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- CN104226290A CN104226290A CN201410454468.8A CN201410454468A CN104226290A CN 104226290 A CN104226290 A CN 104226290A CN 201410454468 A CN201410454468 A CN 201410454468A CN 104226290 A CN104226290 A CN 104226290A
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- tio
- rgo
- aeroge
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Abstract
The invention provides TiO2/RGO aerogel, and a preparation method and application of the TiO2/RGO aerogel, belonging to the technical fields of material preparation and environment purification. By adopting L-Cysteine as a reducing agent and a crosslinking agent, the TiO2/RGO aerogel is prepared by loading TiO2 onto ROG aerogel by a simple one-step hydrothermal method for the first time, and the TiO2/RGO aerogel has a macrostructure of which the diameter is 2.0cm and the height is 3.5mm. The prepared aerogel has high specific surface area, can efficiently adsorb oily wastewater and treat the oily wastewater in a photocatalysis manner, and is easy to separate and recycle. The preparation method is simple, is beneficial to large-scale industrial production, and has significant economic benefits and social benefits, and raw materials are cheap and easily available.
Description
Technical field
The invention belongs to the technical field of material preparation and the depollution of environment, be specifically related to the photochemical catalyst TiO of a kind of efficient adsorption and photocatalysis improvement oily waste water
2/ RGO aeroge and preparation method thereof.
Background technology
The modification modifying process of surface from hydrophilic to hydrophobic often of inorganic particle.For the TiO with photocatalytic activity
2material, a kind of method of modification changes TiO
2surface topography, people's water heat transfer such as such as Jin have the TiO of micro-nano hierarchy surface topography
2, the surface of this appearance structure has superpower parent/hydrophobic performance; The people such as Lin utilize the method for electrochemical anodic oxidation titanium sheet to prepare TiO
2nanofiber pipe array, the pattern of this array has the character of light-operated super parent/hydrophobic.Another kind of enhancing parent/hydrophobic method is at TiO
2surface add organic matter, the people such as such as Sawada have TiO in preparation
2the substrate surface grafting F silane of layer, research points out that the introducing due to macromolecule F reagent makes TiO
2parent/hydrophobic transformational stronger, the stability comparing other polymer composite is also stronger.Also has researcher by two kinds of methods combining together in addition, such as: the people such as Athanassiou prepare coarse TiO with optical lithography
2surface, and grafting spiro-pyrans from the teeth outwards, make TiO
2the hydrophobicity on surface is further enhanced.Although TiO
2hydrophobic research makes great progress, but also has many problems to need to go to solve.First, process hydrophobic complex process and low-surface energy substance used expensive, and high to the requirement of equipment, the time of reaction is long.Secondly, due to the bad mechanical strength of hydrophobic surface, be subject to the destruction of external force, its surface texture is damaged, cause the hydrophobicity on surface greatly to reduce and even lose; In addition, hydrophobic surface, likely by the Substances Pollution of some oiliness, also by other Substances Pollution, may make its hydrophobicity reduce gradually, finally makes TiO in the process used
2powder coagulation, affects its photocatalytic activity greatly.
In actual applications, by TiO
2being carried on hydrophobic solid material surface simple and easy to get and becoming hydrophobic type composite photo-catalyst, is very valuable.Based on this, many hydrophobic type solid materials are by as TiO
2carrier, and excellent hydrophobic type carrier also should have bigger serface, large aperture, can the feature such as rapid mass transfer.Administer for oil spill using cysteine and graphite oxide as the RGO aeroge of precursor synthesis because its super-hydrophobicity can be used as a kind of novel absorption material, and its ultralight density can make it swim on the water surface to receive more sunlight, therefore can as the carrier of good nano-photocatalyst.In addition, the introducing of RGO can also slow down the compound in light induced electron and hole, is conducive to improving photocatalytic activity.Based on these characteristics, this RGO aeroge can be used as the first-selection of nano-photo catalytic agent carrier.But, research TiO
2hydrophobic type aeroge is formed and photocatalytic applications is still in the starting stage with RGO aeroge.Therefore, exploitation has Controllable Wettability, and production technology is simple, and the aeroge catalysis material of easily separated recovery has great meaning to the popularization practical application of photocatalysis technology and the improvement of oily waste water.
Summary of the invention
The object of the present invention is to provide a kind of TiO
2/ RGO aeroge and its preparation method and application, quasi-solution is traditional photochemical catalyst problem such as inefficiency, easy inactivation, not easily separation and recovery when absorption and improvement oily waste water certainly.Photochemical catalyst TiO prepared by the present invention
2/ RGO aeroge has high-specific surface area, Controllable Wettability, efficient adsorption and photocatalysis can administer oily waste water, and easily separated recovery.Preparation method is simple, and cheaper starting materials is easy to get, and is conducive to large-scale industrial production, possesses significant economic and social benefit.
For achieving the above object, the present invention adopts following technical scheme:
A kind of TiO
2/ RGO aeroge is by TiO
2be carried on redox graphene aeroge, having diameter is 2 .0 cm, and height is the macrostructure of 3.5 cm.This aeroge has high-specific surface area, light density, effectively can slow down the compound in light induced electron and hole, uses rear easily separated recovery.
The preparation method of described aeroge is hydro-thermal method: by TiOSO
4adding 50 mL is dissolved with in 200 mg cysteamine aqueous acids, and then at room temperature vigorous stirring 10 ~ 40 min adds the graphene oxide (5 mg/mL) of 20 mL, proceed in the water heating kettle of 100mL, at 100 ~ 160 DEG C, react 10 ~ 20 h.After cooling, product water gel is through washing, and namely freeze-drying obtains described aeroge, wherein TiO
2load capacity is 14.3-76.9wt.%.
Described TiO
2/ RGO aeroge is used for absorption and oily waste water is administered in photocatalysis.
Remarkable advantage of the present invention is:
(1) the present invention is first by TiO
2/ RGO aeroge is applied to photocatalysis field, and its specific area is large, and Controllable Wettability, density is little, effectively can slow down the compound in light induced electron and hole, uses rear easily separated recovery, improves its photocatalysis performance and then administers oily waste water efficiently.
(2) the present invention adopts efficient hydro-thermal method easily, utilizes NAC as reducing agent and crosslinking agent, by TiO
2be carried on RGO aeroge and form TiO
2/ RGO aeroge, having diameter is 2.0 cm, and height is the macrostructure of 3.5 cm.Preparation method is simple, is conducive to large-scale industrial production.
(3) TiO
2/ RGO aeroge can adsorb efficiently administers oily waste water with photocatalysis, has good activity stability simultaneously.Can carry out separation and recovery easily in light-catalyzed reaction system, photochemical catalyst renewable is strong, and recycling rate of waterused is high, has very high practical value and application prospect.
Accompanying drawing explanation
Fig. 1 is the TiO of different content of the present invention
2the photo of/RGO aeroge.
Fig. 2 is TiO of the present invention
2x-ray diffraction (XRD) figure of/RGO aeroge and one-component.
Fig. 3 is TiO of the present invention
2/ RGO aeroge and TiO
2uV-vis DRS (DRS) figure.
Fig. 4 is TiO of the present invention
2/ RGO aeroge and TiO
2nitrogen adsorption-desorption isotherm (BET).
Fig. 5 is TiO of the present invention
2the water contact angle figure of/RGO aeroge.
Fig. 6 is TiO of the present invention
2the situation that/RGO aeroge adsorbs different types of organic solvent.
Fig. 7 is TiO of the present invention
2infrared (IR) comparison diagram of the absorption of/RGO aeroge and photocatalytic degradation oleic acid.
Fig. 8 is TiO of the present invention
2the photo of the absorption of/RGO aeroge and photocatalytic degradation oleic acid and removal process.
Detailed description of the invention
Embodiment 1
There is efficient adsorption and light degradation ability TiO
2the preparation of/RGO aeroge
By TiOSO
4adding 50 mL is dissolved with in 200 mg cysteamine aqueous acids, and then at room temperature vigorous stirring 10 ~ 40 min adds the graphene oxide (5 mg/mL) of 20 mL, proceed in the water heating kettle of 100mL, at 100 ~ 160 DEG C, react 10 ~ 20 h.After cooling, product water gel is through washing, and namely freeze-drying obtains described aeroge, wherein TiO
2load capacity is 14.3-76.9wt%.Fig. 1 illustrates the TiO of different content of the present invention
2the photo of/RGO aeroge, illustrates and can form good aeroge in this proportion.Fig. 2 illustrates TiO of the present invention
2x-ray diffraction (XRD) figure of/RGO aeroge, can find that from figure prepared sample is TiO
2with the compound of RGO.Fig. 3 illustrates TiO
2/ RGO and TiO
2uV-vis DRS (DRS) figure, as can be seen from the figure the absorption band edge of composite photo-catalyst does not change, and TiO is described
2just be carried on the surface of RGO.But absworption peak significantly improves after 365nm, illustrate that the introducing due to RGO enhances the absorption of compound in visible region, have stronger application prospect in photocatalysis field.Fig. 4 illustrates TiO of the present invention
2/ RGO and TiO
2nitrogen adsorption-desorption isotherm, more single TiO is described
2, the introducing of RGO increases the specific area of catalyst, has stronger absorption property, be more conducive to photocatalysis degradation organic contaminant to organic pollution.Fig. 5 illustrates TiO
2the water contact angle figure of/RGO aeroge, as can be seen from the figure at TiO
2load capacity at 14.3-76.9wt%, TiO
2/ RGO aeroge all belongs to hydrophobic type aeroge, and changes TiO
2the adjustable aeroge surface wettability of load capacity, the organic pollution floating on the water surface can be adsorbed.
Embodiment 2
TiO
2/ RGO aeroge adsorbs different types of organic solvent
By the TiO obtained
2/ RGO aeroge, for adsorbing different types of organic solvent, is got aeroge and is added the beaker that organic solvent is housed, and treats that its absorption is saturated, takes out the organic solvent draining its surface, takes gain in weight.TiO of the present invention
2/ RGO aeroge adsorbs the situation of various organic solvent as shown in Figure 6, can reach the 43-120 of sole mass doubly to the adsorbance of organic solvent.
Embodiment 3
TiO
2the absorption of/RGO aeroge and photocatalytic degradation oleic acid
By the TiO obtained
2/ RGO aeroge is used for absorption and photocatalytic degradation oleic acid, and sample thief adds in the water body of oleic acid adrift, under sunshine, carry out photocatalytic degradation.The absorption of oleic acid and photocatalytic degradation situation utilize gain in weight to investigate respectively and infrared spectrum detects.TiO of the present invention
2infrared (IR) contrast of the absorption of/RGO aeroge and photocatalytic degradation oleic acid as shown in Figure 7.As can be observed from Figure, after absorption oleic acid, in the IR spectrogram of catalyst, there are 2925 ~ 2850 cm
-1absorption band is oleic acid typical C-H stretching vibration absworption peak, 1712 cm
-1for C=O stretching vibration absworption peak.Infrared spectrum relatively before and after illumination, after solar irradiation 8h, on collection of illustrative plates, c h bond and the corresponding peak of C=O group disappear substantially, illustrate and are adsorbed on TiO
2oleic acid on/RGO aeroge is completely degraded.Fig. 8 is TiO
2the photo of the absorption of/RGO aeroge and photocatalytic degradation oleic acid and removal process, in 5 s, this aeroge can be clean by the oleic acid absorption on the water surface, and oleic acid of degrading under solar irradiation, and catalyst easily reclaims, and can be recycled.Therefore, TiO of the present invention
2/ RGO aeroge has efficient and stable Photocatalytic Degradation Property.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (4)
1. a TiO
2/ RGO aeroge, is characterized in that: by TiO
2be carried on redox graphene aeroge, wherein TiO
2load capacity be 14.3-76.9 wt.%.
2. prepare TiO as claimed in claim 1 for one kind
2the method of/RGO aeroge, is characterized in that: adopt hydro-thermal method to prepare TiO
2/ RGO aeroge.
3. method according to claim 2, is characterized in that: in 4 g/L cysteine solution, add predecessor TiOSO
4, under room temperature, vigorous stirring 10 ~ 40 min, then adds graphene oxide, 100 DEG C ~ 160 DEG C hydro-thermal reaction 10 h ~ 20 h, cooling, and product, through washing, freeze-drying, obtains described TiO
2/ RGO aeroge.
4. a TiO as claimed in claim 1
2the application of/RGO aeroge, is characterized in that: described TiO
2/ RGO aeroge is used for absorption and oily waste water is administered in photocatalysis.
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181770A (en) * | 2015-09-09 | 2015-12-23 | 上海大学 | Preparation method of manganese dioxide/graphene/titanium dioxide-modified glassy carbon electrode for electrochemical detection of hydrogen peroxide and application of preparation method |
| CN105521770A (en) * | 2016-01-21 | 2016-04-27 | 青岛大学 | Preparation method of graphene oxide and polyvinyl alcohol hybrid aerogel |
| CN105854860A (en) * | 2016-03-22 | 2016-08-17 | 江苏大学 | Preparation method for titanium dioxide/graphene aerogel with high specific surface area |
| CN106512987A (en) * | 2016-11-24 | 2017-03-22 | 河南师范大学 | Ismuth tungstate/graphene aerogel compound visible-light-induced photocatalyst and preparation method thereof |
| CN106512975A (en) * | 2016-10-19 | 2017-03-22 | 常州大学 | Preparation method and application of sulfur-doped titanium dioxide-graphene aerogel composite material |
| CN106799245A (en) * | 2017-02-09 | 2017-06-06 | 河南师范大学 | The 3DMoS of efficient degradation waste water from dyestuff2/ RGO composite aerogel catalysis materials and preparation method thereof |
| CN106910640A (en) * | 2017-04-17 | 2017-06-30 | 上海应用技术大学 | Controllable graphene nanometer sheet electrode material of a kind of form and its preparation method and application |
| CN106984246A (en) * | 2017-03-06 | 2017-07-28 | 常州大学 | A kind of method that hydro-thermal method prepares silicon titanium aerogel composite |
| CN107742701A (en) * | 2017-09-20 | 2018-02-27 | 东华大学 | Graphene titania aerogel composite and its preparation and application |
| CN107748193A (en) * | 2017-09-18 | 2018-03-02 | 江苏大学 | The Preparation method and use of the azepine three-dimensional grapheme aeroge of silver-colored titanium dichloride load |
| CN109585175A (en) * | 2018-11-27 | 2019-04-05 | 合肥工业大学 | A kind of composite aerogel based on SiC nanometer sheet and preparation method thereof and stored energy application |
| CN110054947A (en) * | 2019-05-28 | 2019-07-26 | 长春顺风新材料有限公司 | A kind of noise reduction antibiotic paint and preparation method thereof |
| CN110327853A (en) * | 2019-07-08 | 2019-10-15 | 浙江工业大学 | A kind of sulfonated graphene aeroge and its preparation method and application of titanium dioxide quantum dot load |
| CN111001394A (en) * | 2019-12-26 | 2020-04-14 | 武汉工程大学 | Graphene oxide/sodium alginate composite aerogel efficient adsorbent and preparation method and application thereof |
| CN111298789A (en) * | 2020-02-25 | 2020-06-19 | 福建生物工程职业技术学院 | Au/RGO composite aerogel and preparation method and application thereof |
| CN111423095A (en) * | 2020-03-05 | 2020-07-17 | 厦门大学 | Method for treating residual activated sludge |
| CN111790417A (en) * | 2020-05-23 | 2020-10-20 | 同济大学 | Mxene-derived TiO2Nanosheet-graphene gel composite material and preparation method and application thereof |
| CN113563156A (en) * | 2021-07-28 | 2021-10-29 | 浙江解氏新材料股份有限公司 | Synthesis method of 2-chloro-4 fluorotoluene based on honeycomb filler |
| CN114410206A (en) * | 2022-02-22 | 2022-04-29 | 深圳市加逸科技有限公司 | Hardness-enhanced coating and coating method and application thereof |
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| CN105181770A (en) * | 2015-09-09 | 2015-12-23 | 上海大学 | Preparation method of manganese dioxide/graphene/titanium dioxide-modified glassy carbon electrode for electrochemical detection of hydrogen peroxide and application of preparation method |
| CN105521770A (en) * | 2016-01-21 | 2016-04-27 | 青岛大学 | Preparation method of graphene oxide and polyvinyl alcohol hybrid aerogel |
| CN105854860A (en) * | 2016-03-22 | 2016-08-17 | 江苏大学 | Preparation method for titanium dioxide/graphene aerogel with high specific surface area |
| CN106512975A (en) * | 2016-10-19 | 2017-03-22 | 常州大学 | Preparation method and application of sulfur-doped titanium dioxide-graphene aerogel composite material |
| CN106512987A (en) * | 2016-11-24 | 2017-03-22 | 河南师范大学 | Ismuth tungstate/graphene aerogel compound visible-light-induced photocatalyst and preparation method thereof |
| CN106799245B (en) * | 2017-02-09 | 2020-03-10 | 河南师范大学 | 3DMoS for efficiently degrading dye wastewater2/RGO composite aerogel photocatalytic material and preparation method thereof |
| CN106799245A (en) * | 2017-02-09 | 2017-06-06 | 河南师范大学 | The 3DMoS of efficient degradation waste water from dyestuff2/ RGO composite aerogel catalysis materials and preparation method thereof |
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| CN110327853A (en) * | 2019-07-08 | 2019-10-15 | 浙江工业大学 | A kind of sulfonated graphene aeroge and its preparation method and application of titanium dioxide quantum dot load |
| CN110327853B (en) * | 2019-07-08 | 2021-09-07 | 浙江工业大学 | Sulfonated graphene aerogel loaded with titanium dioxide quantum dots as well as preparation method and application of sulfonated graphene aerogel |
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| CN111298789A (en) * | 2020-02-25 | 2020-06-19 | 福建生物工程职业技术学院 | Au/RGO composite aerogel and preparation method and application thereof |
| CN111423095A (en) * | 2020-03-05 | 2020-07-17 | 厦门大学 | Method for treating residual activated sludge |
| CN111423095B (en) * | 2020-03-05 | 2022-04-08 | 厦门大学 | Method for treating residual activated sludge |
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| CN114410206A (en) * | 2022-02-22 | 2022-04-29 | 深圳市加逸科技有限公司 | Hardness-enhanced coating and coating method and application thereof |
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