CN102886254A

CN102886254A - Preparation of attapulgite compound type ATP-SnO2-TiO2 photocatalyst

Info

Publication number: CN102886254A
Application number: CN2012104308525A
Authority: CN
Inventors: 董兴盛; 司松海; 张志敏; 李晓薇; 杨嵩; 白高鹏
Original assignee: Zhenjiang Yinuowei Shape Memory Alloys Co Ltd
Current assignee: Zhenjiang Yinuowei Shape Memory Alloys Co Ltd
Priority date: 2012-11-02
Filing date: 2012-11-02
Publication date: 2013-01-23

Abstract

The invention provides preparation of an attapulgite compound type ATP-SnO2-TiO2 photocatalyst and belongs to the field of photocatalysts. The preparation is characterized in that SnO2-TiO2 compound oxide is loaded on the surface of attapulgite by using an in-situ sol-gel process; after the compound oxide is loaded and modified, the appearance of the surface of attapulgite is obviously improved; the loading effect of a product is good and the specific surface area is large; and the attapulgite compound photocatalyst has the excellent photocatalysis performance.

Description

A kind of recessed soil composite ATP – SnO 2– TiO 2The preparation of photochemical catalyst

Technical field

The invention belongs to photocatalysis field, refer in particular to a kind of recessed soil composite ATP – SnO ₂– TiO ₂The preparation of photochemical catalyst.

Background technology

Environment and the energy be 21 century facing mankind and etc. problem to be solved.The light-catalyzed reaction technology that can directly utilize solar energy to drive at normal temperatures, become a kind of comparatively desirable environmental pollution improvement and the mode of cleaner production, have broad application prospects in industries such as environmental protection, the energy, medicine, building materials and food, thereby the extremely attention of scientific circles, government department and business circles.TiO ₂Rely on the characteristics such as it is inexpensive, nontoxic, high stability, corrosion resistance, reusable edible, become a kind of photochemical catalyst material of main part that has development prospect, be widely used in the fields such as air cleaning, wastewater treatment, antibiotic and cleaning surfaces.TiO ₂Although photochemical catalyst has higher photocatalytic activity, its disposal efficiency is not high in actual applications.Because in most cases, organic content is very low, and degradation reaction speed is by organic matter and TiO ₂The possibility control of collision, and TiO ₂Itself is relatively poor to organic adsorption capacity, therefore needs the long time to finish light-catalyzed reaction.Adopt adsorptive support load TiO ₂, can make the harmful substance in the environment be gathered in TiO ₂On every side, and pass through TiO ₂With other semiconductors are compound the catalyst surface means such as modify are reduced TiO ₂Energy gap, increase its absorbing wavelength, improve its photocatalysis efficiency thereby take full advantage of sunshine.The present invention develops a kind of recessed soil composite ATP – SnO ₂– TiO ₂The preparation of photochemical catalyst through inquiry, is delivered there are no Patents.

Summary of the invention

The present invention develops a kind of recessed soil composite ATP – SnO ₂– TiO ₂The preparation of photochemical catalyst is characterized by: by the original position sol-gel technology, with SnO ₂– TiO ₂Composite oxide supported in recessed soil surface, through after the composite oxide supported modification, the surface topography of recessed soil be improved significantly, the load effect of product is good, specific area is large, the attapulgite clay composite photo-catalyst demonstrates excellent photocatalysis performance.

The specific embodiment

Embodiment 1: nano-TiO ₂ Preparation

Equation: Ti (OR) ₄+ 4H ₂O=Ti (OH) ₄+ 4ROH

Ti(OH) ₄=TiO ₂+2H ₂O

Under the room temperature with the positive fourth fat of 10mL metatitanic acid [C ₁₆H ₃₆0 ₄Ti, C.P] under vigorous stirring, be added drop-wise in the absolute ethyl alcohol that contains the 5mL triethanolamine among the 30mL, obtain evenly faint yellow transparent solution A.With 2mL H ₂O (distilled water), 10mL absolute ethyl alcohol and 1 mL nitric acid wiring solution-forming B.Under the condition of vigorous stirring, the speed of solution B with 1 drops/sec slowly is added drop-wise in the solution A, obtain uniform vitreosol, continue to stir 30min, ultrasonic dispersion 20min obtains transparent wet gel.Wash centrifugal after with the lower dry 12h of 80 ℃ of gels, obtain light yellow crystal shape thing, then at 400 ~ 600 ℃ of lower roasting 2h, obtain white nano-TiO ₂Powder.

Embodiment 2: the purification of recessed soil

Selecting calgon is dispersant, uses 20 ℃ deionized water, and the consumption of calgon is 3% of recessed native consumption, and agitating mode is that ultrasonic wave adds the middling speed stirring.Concrete steps are: measure deionized water 200mL and place beaker, take by weighing recessed native 10g, accurately take by weighing certain dispersant an amount of (be that solid-to-liquid ratio is 1:20, dispersant dosage be recessed soil property amount 3%); Dispersant is poured in the deionized water, and fully stirring is dissolved it fully, forms homogeneous phase solution; Under agitation, recessed soil slowly added in 20 ℃ the aqueous solution, form suspension after fully stirring.After stirring 15min, this suspension is put concussion and stirring in the ultrasonic cleaner, the abundant aquation of recessed soil particle to suspension is disperseed; After leaving standstill 30min, system obviously is divided into the closely knit beds of precipitation of top suspension and bottom, pour out top suspension and centrifugal alcohol wash, with common drying box the top and the bottom material is carried out drying, 150 ℃ of baking temperatures, obtain respectively recessed soil and the bottom residue of purifying, the recessed soil of purification is called ATP, and its content is close to 100%.

Embodiment 3:ATP – TiO ₂ The preparation of complex

Adopt sol-gel method to make TiO ₂Colloidal sol slowly is added drop-wise in the aqueous solution of ATP in the ultrasonic situation that adds stirring, drip off rear continuation ultrasonic adding to stir 1 hour, then with deionized water with ATP – TiO ₂The presoma of complex cleans and centrifugal 3 times.Again 80 ℃ lower dry 12 hours, then grind, with the calcination 2 hours under different temperatures of the powder that obtains, can obtain the ATP – TiO of different calcination temperatures ₂Complex.

Embodiment 4: compound ATP – SnO ₂ – TiO ₂ The photochemical catalyst preparation

Take by weighing 5g ATP – SnO ₂Powder, under agitation slowly splash into the 11.52g tetrabutyl titanate to it, after the two mixes, slowly drip the 100mL deionized water to it while stirring, stir 1h, still aging 4h, washing, centrifugal, 80 ℃ of dry 12h put into after the grinding under the muffle furnace different temperatures and calcine 2h, namely make compound ATP – SnO2 – TiO2 photochemical catalyst.

Claims

1. recessed soil composite ATP – SnO ₂– TiO ₂The preparation of photochemical catalyst is characterized by: by the original position sol-gel technology, with SnO ₂– TiO ₂Composite oxide supported in recessed soil surface, through after the composite oxide supported modification, the surface topography of recessed soil be improved significantly, the load effect of product is good, specific area is large, the attapulgite clay composite photo-catalyst demonstrates excellent photocatalysis performance.

2. described a kind of recessed soil composite ATP – SnO according to claim 1 ₂– TiO ₂The preparation of photochemical catalyst can obtain white nano-TiO ₂Powder, the recessed soil of purification is called ATP, and its content is close to 100%, obtains the ATP – TiO of different calcination temperatures ₂Complex makes compound ATP – SnO2 – TiO2 photochemical catalyst at last.