CN103551203A - Preparation method for loading titanium dioxide (TiO2) nano fiber photocatalyst on basalt cellucotton substrate - Google Patents

Preparation method for loading titanium dioxide (TiO2) nano fiber photocatalyst on basalt cellucotton substrate Download PDF

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CN103551203A
CN103551203A CN201310556821.9A CN201310556821A CN103551203A CN 103551203 A CN103551203 A CN 103551203A CN 201310556821 A CN201310556821 A CN 201310556821A CN 103551203 A CN103551203 A CN 103551203A
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basalt fibre
basalt
cotton
preparation
tio
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CN103551203B (en
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梁小平
罗大军
徐彩云
高红娇
徐梦星
王浩龙
王科翔
张颖策
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Tianjin Polytechnic University
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Tianjin Polytechnic University
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Abstract

The invention relates to a preparation method for loading a titanium dioxide (TiO2) nano fiber photocatalyst on a basalt cellucotton substrate. The method comprises the following raw materials: tetrabutyl titanate, polyvinylpyrrolidone (PVPK90), absolute ethyl alcohol, nitric acid and basalt cellucotton. A precursor solution is prepared by adopting tetrabutyl titanate, nitric acid and polyvinylpyrrolidone (PVPK90), PVP/TiO2 composite fibers are precipitated on the basalt cellucotton substrate after being pre-processed by an electrospinning technique, then the basalt cellucotton substrate with the PVP/TiO2 composite fibers is insulated and sintered and then cooled to the room temperature, so that the photocatalyst with TiO2 nano fibers being loaded on the basalt cellucotton substrate is obtained. The method is characterized in that the TiO2 nano fibers with large draw ratio, controllable diameter and large specific surface area is loaded on the basalt cellucotton substrate with large porous surface area, so that the TiO2 photocatalytic efficiency is improved, and the catalyst is easy to recover.

Description

Load TiO on the cotton matrix of a kind of basalt fibre 2the preparation method of nanofiber photochemical catalyst
Technical field
The present invention relates to load TiO on the cotton matrix of a kind of basalt fibre 2the preparation method of nanofiber photochemical catalyst, relates to material for water treatment field.
Background technology
According to recent statistics, the annual textile printing and dyeing wastewater discharge capacity of China is 7,000,000,000 tons, contains multiple strong toxicity, organic compound that concentration is high in this class organic wastewater, and traditional processing method has flocculent precipitation, absorption method, biochemical process and chemical oxidization method etc.These methods all exist that power consumption is large, cost is high and process the problems such as not thorough, therefore develop effective dyeing and printing process wastewater processing technology, and industrial production, environmental protection and national life are had to important impact.In recent years, with titanium dioxide TiO 2be that main photocatalysis oxidation technique is achieving noticeable achievement aspect degrading high concentration organic pollution.TiO 2application aspect water treatment is based on TiO 2after optical excitation, produce the redox ability in electronics and hole, thereby utilize cheap oxidant as airborne O 2organic and inorganic pollution in photochemical catalytic oxidation decomposition water, comprises hydrocarbon and derivative, itrogenous organic substance, surfactant, carboxylic acid, dyestuff and medical waste water etc.
But due to nano-TiO 2the shortcomings such as powder is easily assembled, recycling difficult, active ingredient loss is large, are seriously restricting nano-TiO 2the industrialization of photochemical catalyst, therefore stable, the efficient supported titanium of preparation 2photochemical catalyst has become one of key technology of photochemical catalytic oxidation.
Summary of the invention
The object of this invention is to provide load TiO on the cotton matrix of a kind of basalt fibre 2the preparation method of nanofiber photochemical catalyst.
Load TiO on the cotton matrix of a kind of basalt fibre 2the preparation method of nanofiber photochemical catalyst, is characterized in that, the method step is as follows,
(4) get appropriate butyl titanate, with the speed of 1~2 per minute, drip nitric acid, at 50~70 ℃, constant temperature stirs 30~60min, obtains transparent red solution, then add polyvinylpyrrolidone to stir 3~5h it is sufficiently uniformly dissolved, more static 1~2h obtains precursor solution;
(5) in environment temperature, be 18~22 ℃, ambient humidity is 35~55%, and curing distance is 15~20cm, and polytetrafluoroethylene (PTFE) needle tubing and stainless steel syringe needle horizontal cross angle of inclination are under the condition of 14~16 °, to carry out electrostatic spinning to prepare PVP/TiO 2composite fibre, the contact rod with stainless steel electrode as spinning solution, negative pole receiving system is that pretreated basalt fibre is cotton;
(6) by the PVP/TiO of load on the cotton matrix of basalt fibre 2composite fibre in high temperature furnace under air atmosphere at 400 ℃~700 ℃ roasting 1.5~2h, heating rate is 3~5 ℃/min, is naturally cooled to room temperature, obtains load TiO on the cotton matrix of basalt fibre 2nanofiber photochemical catalyst.
The cotton pretreatment of described basalt fibre is chemical plating covered with metal layer.The cotton chemical nickel plating covered with metal layer of basalt fibre can be adopted with the following method:
First basalt fibre felt carries out the heat treatment of 350-550 ℃, then carries out chemical nickel plating.
The plating solution of chemical plating consists of main salt nickelous sulfate NiSO 46H 2o (28-36g/L), reducing agent inferior sodium phosphate NaH 2pO 2h 2o (24-32g/L), lactic acid+propionic acid (6-10g/L), buffer anhydrous sodium acetate NaHCO 3(10-20g/L), stabilizing agent thiocarbamide CS (NH 2) 2(1-2mg/L).Sedimentary condition is: pH value is 4.4-5.4, time 30-90min, reaction temperature 80-95 ℃.
Described polyvinylpyrrolidone is PVPk90, before using, grinds 5~15min.Polyvinylpyrrolidone consumption is the 6-10% of solution gross mass.
Described TiO 2nanofiber is anatase and Rutile Type mixed crystal phase.
Described pretreated basalt fibre felt is carrier, load TiO 2nanofiber.
Beneficial effect of the present invention is:
(1) because basalt fibre cotton is porous material, all can load TiO with surface between its layer of gap 2nanofiber, thus its load factor improved.
(2) this preparation method is simple, easy to operate, and cost is low, pollution is few, and photochemical catalyst easily reclaims, and reduces waste.
Accompanying drawing explanation
Fig. 1 is the load TiO of embodiment 1 preparation 2projection electron microscope (TEM) picture of the basalt fibre cotton of nanofiber photochemical catalyst;
Fig. 2 is the collection of illustrative plates of the XRD of pretreated basalt fibre cotton used in embodiment 1;
Fig. 3 is the TiO of preparation in embodiment 1 2the collection of illustrative plates of nanofiber photochemical catalyst XRD;
Fig. 4 be preparation in embodiment 1 photochemical catalyst the degradation rate of differential responses time Methyl Orange with basalt fibre TiO on cotton matrix 2the variation of nano-fibre supported rate.
The specific embodiment
Take that butyl titanate, polyvinylpyrrolidone (PVPK90), absolute ethyl alcohol, nitric acid and basalt fibre are cotton prepares load TiO on a kind of basalt fibre cotton matrix for raw material 2nanofiber photochemical catalyst.Porous basalt cellucotton is as matrix, the TiO that the diameter of the big L/D ratio that electrostatic spinning technique is synthetic is controlled and specific area is large 2nanofiber is photochemical catalyst, and the two cooperative effect improves light-catalyzed reaction efficiency.
Below in conjunction with drawings and Examples, the invention will be further described:
Embodiment 1
Load TiO on the cotton matrix of a kind of basalt fibre 2the preparation method of nanofiber photochemical catalyst, the method step is as follows,
Take 50ml butyl titanate, at 60 ℃, constant temperature stirs, to the speed with 1 per minute in mixed liquor, drip nitric acid, to pH=4, uniform stirring 30min, obtain transparent red solution, then add polyvinylpyrrolidone PVPk90 (polyvinylpyrrolidone consumption be solution gross mass 9%) to stir 4h it is sufficiently uniformly dissolved, more static 1h obtains transparent precursor solution.In environment temperature, be 20 ℃, humidity is 40%, and solidifying distance is 18cm, and polytetrafluoroethylene (PTFE) needle tubing and stainless steel syringe needle horizontal cross angle of inclination are under 16 ° of conditions, to carry out spinning to prepare PVP/TiO 2composite fibre, the contact rod with stainless steel electrode as spinning solution, negative pole receiving system is cotton through the basalt fibre of chemical nickel plating.By the PVP/TiO of load on the cotton matrix of basalt fibre 2composite fibre in high temperature furnace under air atmosphere at 550 ℃ of roasting 2h, heating rate is 3 ℃/min, is naturally cooled to room temperature, obtains load TiO on the cotton matrix of basalt fibre 2nanofiber photochemical catalyst.
The cotton chemical nickel plating covered with metal layer of basalt fibre can be adopted with the following method:
First basalt fibre felt carries out the heat treatment of 350-550 ℃, then carries out chemical nickel plating.
The plating solution of chemical plating consists of main salt nickelous sulfate NiSO 46H 2o (36g/L), reducing agent inferior sodium phosphate NaH 2pO 2h 2o (30g/L), lactic acid+propionic acid (8g/L), buffer anhydrous sodium acetate NaHCO 3(15g/L), stabilizing agent thiocarbamide CS (NH 2) 2(0.5mg/L).Sedimentary condition is: pH value is 4.8, time 60min, 85 ℃ of reaction temperatures.
In the surface plate of sealing, add the 20mg/L methyl orange solution 20mL of preparation in advance, then put into the TiO of different loads rate 2the basalt fibre of nanofiber photochemical catalyst is cotton, in darkroom, places and reaches after adsorption equilibrium, is placed under the uviol lamp of 300W and carries out light-catalyzed reaction, at regular intervals sample analysis.Methyl orange solution concentration adopts 721 visible spectrophotometers to analyze mensuration.Absorbance under λ=465nm wavelength before and after working sample photocatalytic degradation, and according to the concentration of the methyl orange after concentration-absorbance calibration curve calculating light-catalyzed reaction certain hour.
Fig. 1 is the load TiO of embodiment 1 preparation 2transmission electron microscope (TEM) picture of the basalt fibre cotton of nanofiber photochemical catalyst, the as can be seen from the figure TiO in cellucotton 2nanofiber, diameter is about 10~30nm.Fig. 2 is the collection of illustrative plates of the XRD of basalt fibre cotton used in embodiment 1, can find out that basalt fibre cotton is amorphous glass state in figure.Fig. 3 is the TiO of preparation in embodiment 1 2the collection of illustrative plates of nanofiber photochemical catalyst XRD, as can be seen from the figure TiO 2phase be anatase and Rutile Type mixed crystal phase.Fig. 4 be preparation in embodiment 1 photochemical catalyst the degradation rate of differential responses time Methyl Orange with basalt fibre TiO on cotton matrix 2the variation of nano-fibre supported rate.Therefrom can find out, along with TiO on the cotton matrix of basalt fibre 2the increase of nano-fibre supported rate, photocatalytic activity presents first the trend slowly reducing after sharply increase, when load factor is 4.2%, the degradation rate after methyl orange degradation 8h is risen to 95.3% from 55.1% of 1h.Along with TiO 2the load capacity of nanofiber continues to increase, and the cotton surface of basalt fibre will be tending towards smooth gradually, and photocatalytic activity therefore can slow decreasing.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (6)

1. load TiO on the cotton matrix of a basalt fibre 2the preparation method of nanofiber photochemical catalyst, is characterized in that, the method step is as follows,
(1) get appropriate butyl titanate, with the speed of 1~2 per minute, drip nitric acid, at 50~70 ℃, constant temperature stirs 30~60min, obtains transparent red solution, then add polyvinylpyrrolidone to stir 3~5h it is sufficiently uniformly dissolved, more static 1~2h obtains precursor solution;
(2) in environment temperature, be 18~22 ℃, ambient humidity is 35~55%, and curing distance is 15~20cm, and polytetrafluoroethylene (PTFE) needle tubing and stainless steel syringe needle horizontal cross angle of inclination are under the condition of 14~16 °, to carry out electrostatic spinning to prepare PVP/TiO 2composite fibre, the contact rod with stainless steel electrode as spinning solution, negative pole receiving system is that pretreated basalt fibre is cotton;
(3) by the PVP/TiO of load on the cotton matrix of basalt fibre 2composite fibre in high temperature furnace under air atmosphere at 400 ℃~700 ℃ roasting 1.5~2h, heating rate is 3~5 ℃/min, is naturally cooled to room temperature, obtains load TiO on the cotton matrix of basalt fibre 2nanofiber photochemical catalyst.
2. load TiO on the cotton matrix of a kind of basalt fibre according to claim 1 2the preparation method of nanofiber photochemical catalyst, is characterized in that, the cotton pretreatment of described basalt fibre is chemical plating covered with metal layer.
3. load TiO on the cotton matrix of a kind of basalt fibre according to claim 1 2the preparation method of nanofiber photochemical catalyst, is characterized in that, described polyvinylpyrrolidone is PVPk90, before using, grinds 5~15min.
4. load TiO on the cotton matrix of a kind of basalt fibre according to claim 1 2the preparation method of nanofiber photochemical catalyst, is characterized in that, polyvinylpyrrolidone consumption is the 6-10% of solution gross mass.
5. load TiO on the cotton matrix of a kind of basalt fibre according to claim 1 2the preparation method of nanofiber photochemical catalyst, is characterized in that, the pretreated basalt fibre felt of take is carrier, load TiO 2nanofiber.
6. load TiO on the cotton matrix of a kind of basalt fibre according to claim 1 2the preparation method of nanofiber photochemical catalyst, is characterized in that, the cotton chemical nickel plating covered with metal layer of basalt fibre is adopted with the following method:
First basalt fibre felt carries out the heat treatment of 350-550 ℃, then carries out chemical nickel plating;
The plating solution of chemical plating consists of main salt nickelous sulfate NiSO 46H 2o (28-36g/L), reducing agent inferior sodium phosphate NaH 2pO 2h 2o (24-32g/L), lactic acid+propionic acid (6-10g/L), buffer anhydrous sodium acetate NaHCO 3(10-20g/L), stabilizing agent thiocarbamide CS (NH 2) 2(1-2mg/L), sedimentary condition is: pH value is 4.4-5.4, time 30-90min, reaction temperature 80-95 ℃.
CN201310556821.9A 2013-11-08 2013-11-08 TiO is loaded in a kind of basalt fibre cotton matrix2The preparation method of nanofiber photocatalyst Expired - Fee Related CN103551203B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104549355A (en) * 2015-01-13 2015-04-29 山东默锐环保科技有限公司 Application of volcanic used as titanium dioxide loaded photocatalyst
CN105664938A (en) * 2015-12-29 2016-06-15 四川力久知识产权服务有限公司 Basalt fiber automotive exhaust purifying material and preparation method thereof
TWI566830B (en) * 2015-10-28 2017-01-21 Yu-Xun Nian Preparation of Photocatalyst Composite Nanofibers
CN108906129A (en) * 2018-06-22 2018-11-30 东华大学 It is a kind of based on composite electroless-plating fiber base nickel-loaded/optically catalytic TiO 2 degradable material preparation method

Citations (2)

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Publication number Priority date Publication date Assignee Title
US4363878A (en) * 1980-03-17 1982-12-14 Nitto Boseki Co., Ltd. Alkali- and heat-resistant inorganic fiber
CN102019176A (en) * 2010-12-16 2011-04-20 海宁安捷复合材料有限责任公司 Method for preparing basalt fiber-based TiO2 photocatalytic film

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4363878A (en) * 1980-03-17 1982-12-14 Nitto Boseki Co., Ltd. Alkali- and heat-resistant inorganic fiber
CN102019176A (en) * 2010-12-16 2011-04-20 海宁安捷复合材料有限责任公司 Method for preparing basalt fiber-based TiO2 photocatalytic film

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滕乐天等: "静电纺丝制备TiO2纳米纤维的光催化性能", 《硅酸盐学报》 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104549355A (en) * 2015-01-13 2015-04-29 山东默锐环保科技有限公司 Application of volcanic used as titanium dioxide loaded photocatalyst
TWI566830B (en) * 2015-10-28 2017-01-21 Yu-Xun Nian Preparation of Photocatalyst Composite Nanofibers
CN105664938A (en) * 2015-12-29 2016-06-15 四川力久知识产权服务有限公司 Basalt fiber automotive exhaust purifying material and preparation method thereof
CN105664938B (en) * 2015-12-29 2018-09-18 四川力久知识产权服务有限公司 A kind of basalt fibre purifying vehicle exhaust material and preparation method thereof
CN108906129A (en) * 2018-06-22 2018-11-30 东华大学 It is a kind of based on composite electroless-plating fiber base nickel-loaded/optically catalytic TiO 2 degradable material preparation method

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