CN105126851B - One kind oxidation Fe2O3 doping two-phase titanium deoxid film visible light catalyst preparation method - Google Patents
One kind oxidation Fe2O3 doping two-phase titanium deoxid film visible light catalyst preparation method Download PDFInfo
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- CN105126851B CN105126851B CN201510543401.6A CN201510543401A CN105126851B CN 105126851 B CN105126851 B CN 105126851B CN 201510543401 A CN201510543401 A CN 201510543401A CN 105126851 B CN105126851 B CN 105126851B
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Abstract
The present invention provides one kind to aoxidize Fe2O3 doping two-phase titanium deoxid film visible light catalyst preparation method, and carrying out the conventional surfaces such as deoiling cleaning to steel material surface first cleans；Using steel material as anode, it is placed in electrolyte solution, carries out differential arc oxidation processing；There is micro-arc oxidation films steel sample to carry out simply cleaning and drying surface, obtain sample；The sample that step 3 is obtained is heat-treated, and obtains target product.Electrolyte solution should at least include four kinds of aluminate, dihydric phosphate, sulfate and titania powder components.Prepared oxidation Fe2O3 doping two-phase titanium deoxid film is used for visible light photocatalytic degradation methylene blue, there is good degradation effect.The process stabilizing of the present invention is reliable, and the equipment of use is simple, and reaction carries out at normal temperatures, easy to operate, is easy to grasp, electrolyte solution is environment-friendly type solution, meets environment protection emission requirement.
Description
Technical field
The present invention relates to differential arc oxidization technique and its post-processing technology, refers in particular to a kind of prepared in steel surface and aoxidizes Fe2O3 doping
The method of two-phase titanium deoxid film, the oxidation Fe2O3 doping two-phase titanium deoxid film prepared by this method can be used for visible ray
Catalytic degradation organic pollution, is used especially for visible light photocatalytic degradation methylene blue.
Background technology
Photocatalysis field is always the hot spot of scientific research, and one of difficult point.Semiconductor catalyst is considered as always
The preferable catalyst of effect, including titanium oxide, zinc oxide, titanium oxide etc..Wherein, titanium dioxide, due to preferable comprehensive
Performance and be widely studied.Titanium dioxide after especially adulterating, has preferable visible light activity, can be under visible ray photograph
Realize photovoltaic effect, water process, organic matter degradation etc..Titanium dioxide has a variety of knots such as brilliant red stone, anatase, brockite
Structure.Research shows, the mixed structure of the red stone of a certain amount of crystalline substance and anatase has preferable catalytic performance, and aoxidizes Fe2O3 doping energy
Significantly improve the visible light activity of titanium dioxide.Therefore, scientific research personnel is prepared for oxidation Fe2O3 doping titanium dioxide using a variety of methods
Titanium.
Differential arc oxidization technique is the process for modifying surface to grow up in recent years, which is used in material surface especially
It is that metal surface prepares various films, can both improves the performance of metallic matrix, while various functions film can also be obtained, into
For the hot spot in investigation of materials field.Differential arc oxidization technique is initially to be answered on so-called valve metal and its alloy surface processing
With such as Al, Mg, Ti and its alloy, some scholars were gradually in the research of development iron-based material differential arc oxidation in recent years.This seminar
Some discussions have been carried out to steel surface differential arc oxidation study on the modification, wear-and corrosion-resistant film and photocatalysis are prepared in steel surface
Function film.The present invention prepares the titanium deoxid film containing ferro element first with differential arc oxidation in steel surface, then passes through heat
Processing, obtains the titania-doped film of iron oxide with brilliant red stone and anatase double structure, and research shows that the film has
There is higher visible light catalysis activity.
The content of the invention
Oxidation Fe2O3 doping two-phase titanium dioxide is prepared by differential arc oxidation in steel surface the object of the present invention is to provide one kind
The method of titanium film, is a new method that catalyst film is prepared in steel surface, and this method first passes through differential arc oxidation in steel
Iron surface prepares titanium deoxid film, then has brilliant red stone and anatase structured and possess oxidation Fe2O3 doping by being heat-treated to obtain
Titanium deoxid film.This method is both in-depth research, the expansion application to differential arc oxidation, while is also with visible light catalytic
The titanium dioxide thin film catalyst of activity provides a kind of new attachment carrier, i.e., cheap steel substrate.The present invention is suitable for
Various carbon steels, steel alloy in addition to stainless steel etc..
The present invention is achieved through the following technical solutions：
One kind oxidation Fe2O3 doping two-phase titanium deoxid film visible light catalyst preparation method, includes the following steps：
Step 1, first carry out steel material surface the cleaning of the conventional surfaces such as deoiling cleaning；
Step 2, using steel material as anode, be placed in electrolyte solution, carry out differential arc oxidation processing；
Step 3, the steel sample that surface is had micro-arc oxidation films carry out simply cleaning and drying, by dried sample
It is heat-treated, obtains target product.
To realize the purpose of steel surface differential arc oxidation film layer, in the step 2, electrolyte solution should at least be included such as
The each component of lower concentration：0.1~0.8mol/L aluminates, 0.01~0.1mol/L dihydric phosphates, 0.01~0.1mol/L sulphur
Hydrochlorate, 2~60g/L titania powders.
Micro-arc oxidation process of the present invention is 400~600V using the bi-directionally or uni-directionally pulse power, voltage, and current density is 2
~15A/dm2Between, 15~50min of reaction time.
The heat-treating methods are：Using box heat treatment furnace, in air atmosphere, firing rate for 8~10 DEG C/
Under the conditions of min, be heated to 800 DEG C, and keep the temperature 4~6 it is small when, cool to room temperature with the furnace.
In order to improve adjustment micro-arc oxidation process stability and film layer quality, electrolyte solution also containing phosphate,
At least one of pyrophosphate, ammonium dihydrogen phosphate；Phosphate concn is 0~0.2mol/L, pyrophosphate concentration for 0~
0.1mol/L, biphosphate ammonium concentration are 0~0.2mol/L.
The aluminate, dihydric phosphate, sulfate, phosphate, pyrophosphate are sodium salt or sylvite.
Further, electrolyte solution contains each component of following concentration：0.1~0.4mol/L sodium aluminates and 0.01~
0.05mol/L sodium dihydrogen phosphates, 0.01~0.05mol/L sodium sulphate, 10~30g/L titania powders, 0~0.05mol/L
Sodium phosphate.
Further, electrolyte solution contains each component of following concentration：0.4~0.6mol/L sodium aluminates and 0.05~
0.08mol/L potassium dihydrogen phosphates, 0.05~0.08mol/L sodium sulphate, 2~10g/L titania powders, 0.05~0.1mol/L
Sodium phosphate, 0.03~0.07mol/L sodium pyrophosphates.
Further, electrolyte solution contains each component of following concentration：0.6~0.8mol/L sodium aluminates and 0.08~
0.1mol/L potassium dihydrogen phosphates, 0.08~0.1mol/L sodium sulphate, 30~60g/L titania powders, 0.1~0.2mol/L phosphorus
Sour sodium, 0.07~0.1mol/L sodium pyrophosphates, 0.1~0.2mol/L ammonium dihydrogen phosphates.
Visible light photocatalytic degradation methylene is used for according to oxidation Fe2O3 doping two-phase titanium deoxid film prepared by the above method
It is blue.
Each step, the mechanism of component and effect：
Differential arc oxidation：By differential arc oxidation, the film containing elements such as titanium, oxygen, iron is obtained.In above-mentioned electrolyte system
In, realize steel surface differential arc oxidation, and film layer is obtained, its film layer main component common denominator is in electrolyte and matrix, such as mesh
The elements such as titanium, oxygen are marked essentially from electrolyte, ferro element is essentially from matrix；Phosphate, pyrophosphate, ammonium dihydrogen phosphate is can
Component is selected, can as needed add a small amount of or be not added with.
Heat treatment：By heat treatment, make film layer that the transformation of crystal structure occur, so as to obtain target crystalline phase.
The specific preparation method of electrolyte：
In the case where being stirred continuously, soluble constituent is first dissolved in deionized water, for example, in the case where being stirred continuously, go from
Appropriate sodium aluminate, sodium dihydrogen phosphate, sodium sulphate are sequentially added in sub- water, then is separately added into titania powder etc..
The present invention distinctive feature and beneficial effect be：
(1) pulse power and appropriate electrolyte system are utilized, activates and strengthens steel chemical process occurs on anode,
Plasma reaction is produced, realizes the differential arc oxidation of steel, expands the application range of traditional differential arc oxidation；Realize steel table
Face aoxidizes the preparation of Fe2O3 doping and the film containing brilliant red stone and anatase two-phase titanium dioxide, in differential arc oxidation field and its compound
Report is had no in processing method.
(2) present invention is suitable for various carbon steels, cast iron, steel alloy etc., and Body regions are extensive.
(3) film for being attached to steel surface has preferable visible light catalysis activity, by prepared oxidation Fe2O3 doping
Two-phase titanium deoxid film is used for visible light photocatalytic degradation methylene blue, has good degradation effect, can reach 89% drop
Solution rate.
(4) process stabilizing of the invention is reliable, and the equipment of use is simple, and reaction carries out at normal temperatures, easy to operate, is easy to
Grasp, electrolyte solution is environment-friendly type solution, meets environment protection emission requirement.
Brief description of the drawings
Fig. 1 is the SEM figures of sample surfaces film prepared by embodiment 1；
Fig. 2 is the XRD spectrum of sample surfaces film prepared by embodiment 1；
Fig. 3 is the XPS fine scannings spectrum of sample surfaces film prepared by embodiment 1；
Fig. 4 is the design sketch that sample prepared by embodiment 1 is used for 6 circulation visible light photocatalytic degradation methylene blues.
Embodiment
It is further explanation to the present invention with reference to specific embodiment：
Embodiment 1：
1. pair Q235 carbon steels surface carries out deoiling cleaning.
2. prepare the electrolyte of the component containing following concentration：0.1~0.4mol/L sodium aluminates, 0.01~0.05mol/L
Sodium dihydrogen phosphate, 0.01~0.5mol/L sodium sulphate, 10~30g/L titania powders.
3. carry out differential arc oxidation processing, 400~600V of voltage, 5~20A/ of current density using Q235 carbon steels as anode
dm2, handle 15~50 minutes.
4. by Surface Creation the carbon steel of micro-arc oxidation films 800 DEG C carry out heat treatment 4 it is small when, and furnace cooling.
5. pair film obtained carries out structural characterization and performance test.
Its surface topography such as Fig. 1, surface are in porous coarse structure, and this structure is beneficial to the surface area for increasing catalyst,
So as to increase surface-catalyzed reactions point.XRD spectrum is shown in Fig. 2, which shows that film has brilliant red stone, anatase and iron oxide crystalline substance
Body composition.XPS fine scannings are shown in Fig. 3, which demonstrates the presence of iron oxide again.Fig. 4 is shown in photocatalysis test, is in visible ray
To the visible light photocatalytic degradation of methyl blue under illumination, under the illumination of 4 hours, degradation rate reaches 88%, and circulation light is urged
Change better performances.6 same photocatalysis experiments have successively been carried out, have 3 times all maintained higher activity.
Embodiment 2：
1. pair 30CrMnSi alloys steel surface carries out deoiling cleaning.
2. prepare the electrolyte of the component containing following concentration：0.1~0.4mol/L sodium aluminates, 0.01~0.05mol/L
Sodium dihydrogen phosphate, 0.01~0.05mol/L sodium sulphate, 10~30g/L titania powders, 0~0.05mol/L sodium phosphates.
3. using 30CrMnSi steel alloys as anode carry out differential arc oxidation processing, 400~600V of voltage, current density 5~
20A/dm2, handle 15~50 minutes.
4. by Surface Creation the steel alloy of micro-arc oxidation films 800 DEG C carry out heat treatment 6 it is small when, and furnace cooling.
5. pair film obtained carries out structural characterization and performance test, product phenogram is similar with Fig. 1~Fig. 3, shows to produce
The successful preparation of product, the product are equally applicable to visible light photocatalytic degradation methylene blue, and degradation rate reaches 87%.
Embodiment 3：
1. pair 30CrMnSi alloys steel surface carries out deoiling cleaning.
2. prepare the electrolyte of the component containing following concentration：0.4~0.6mol/L sodium aluminates and 0.05~0.08mol/L
Potassium dihydrogen phosphate, 0.05~0.08mol/L sodium sulphate, 2~10g/L titania powders, 0.05~0.1mol/L sodium phosphates,
0.03~0.07mol/L sodium pyrophosphates.
3. using 30CrMnSi steel alloys as anode carry out differential arc oxidation processing, 400~600V of voltage, current density 5~
20A/dm2, handle 15~50 minutes.
4. by Surface Creation the steel alloy of micro-arc oxidation films 800 DEG C carry out heat treatment 6 it is small when, and furnace cooling.
5. pair film obtained carries out structural characterization and performance test, product phenogram is similar with Fig. 1~Fig. 3, shows to produce
The successful preparation of product, the product are equally applicable to visible light photocatalytic degradation methylene blue, and degradation rate reaches 88%.
Embodiment 4：
1. pair Q235 carbon steels surface carries out deoiling cleaning.
2. prepare the electrolyte of the component containing following concentration：0.6~0.8mol/L sodium aluminates, 0.08~0.1mol/L phosphorus
Acid dihydride sodium, 0.08~0.1mol/L sodium sulphate, 30~60g/L titania powders, 0.1~0.2mol/L sodium phosphates, 0.07
~0.1mol/L sodium pyrophosphates, 0.1~0.2mol/L ammonium dihydrogen phosphates.
3. carry out differential arc oxidation processing, 400~600V of voltage, 5~20A/ of current density using Q235 carbon steels as anode
dm2, handle 15~50 minutes.
4. by Surface Creation the carbon steel of micro-arc oxidation films 800 DEG C carry out heat treatment 4 it is small when, and furnace cooling.
5. pair film obtained carries out structural characterization and performance test, product phenogram is similar with Fig. 1~Fig. 3, shows to produce
The successful preparation of product, product of changing products are equally applicable to visible light photocatalytic degradation methylene blue, and degradation rate reaches 89%.
Embodiment 5：
1. pair 30CrMnSi alloys steel surface carries out deoiling cleaning.
2. prepare the electrolyte of the component containing following concentration：0.4~0.6mol/L sodium aluminates and 0.05~0.08mol/L
Potassium dihydrogen phosphate, 0.05~0.08mol/L sodium sulphate, 2~10g/L titania powders, 0.05~0.1mol/L sodium phosphates, 0
~0.03mol/L sodium pyrophosphates.
3. using 30CrMnSi steel alloys as anode carry out differential arc oxidation processing, 400~600V of voltage, current density 5~
20A/dm2, handle 15~50 minutes.
4. by Surface Creation the steel alloy of micro-arc oxidation films 800 DEG C carry out heat treatment 6 it is small when, and furnace cooling.
5. pair film obtained carries out structural characterization and performance test, product phenogram is similar with Fig. 1~Fig. 3, shows to produce
The successful preparation of product, the product are equally applicable to visible light photocatalytic degradation methylene blue, and degradation rate reaches 84%.
Embodiment 6：
1. pair Q235 carbon steels surface carries out deoiling cleaning.
2. prepare the electrolyte of the component containing following concentration：0.6~0.8mol/L sodium aluminates, 0.08~0.1mol/L phosphorus
Acid dihydride sodium, 0.08~0.1mol/L sodium sulphate, 30~60g/L titania powders, 0.1~0.2mol/L sodium phosphates, 0.07
~0.1mol/L sodium pyrophosphates, 0.05~0.1mol/L ammonium dihydrogen phosphates.
3. carry out differential arc oxidation processing, 400~600V of voltage, 5~20A/ of current density using Q235 carbon steels as anode
dm2, handle 15~50 minutes.
4. by Surface Creation the carbon steel of micro-arc oxidation films 800 DEG C carry out heat treatment 4 it is small when, and furnace cooling.
5. pair film obtained carries out structural characterization and performance test, product phenogram is similar with Fig. 1~Fig. 3, shows to produce
The successful preparation of product, the product are equally applicable to visible light photocatalytic degradation methylene blue, and degradation rate reaches 88%.
Embodiment 7：
1. pair Q235 carbon steels surface carries out deoiling cleaning.
2. prepare the electrolyte of the component containing following concentration：0.6~0.8mol/L sodium aluminates, 0.08~0.1mol/L phosphorus
Acid dihydride sodium, 0.08~0.1mol/L sodium sulphate, 30~60g/L titania powders, 0.1~0.2mol/L sodium phosphates, 0.07
~0.1mol/L sodium pyrophosphates, 0~0.05mol/L ammonium dihydrogen phosphates.
3. carry out differential arc oxidation processing, 400~600V of voltage, 5~20A/ of current density using Q235 carbon steels as anode
dm2, handle 15~50 minutes.
4. by Surface Creation the carbon steel of micro-arc oxidation films 800 DEG C carry out heat treatment 4 it is small when, and furnace cooling.
5. pair film obtained carries out structural characterization and performance test, product phenogram is similar with Fig. 1~Fig. 3, shows to produce
The successful preparation of product, the product are equally applicable to visible light photocatalytic degradation methylene blue, and degradation rate reaches 87%.
Embodiment 8：
1. pair Q235 carbon steels surface carries out deoiling cleaning.
2. prepare the electrolyte of the component containing following concentration：0.1mol/L sodium aluminates, 0.01mol/L sodium dihydrogen phosphates,
0.01mol/L sodium sulphate, 30g/L titania powders.
3. carry out differential arc oxidation processing, 400~600V of voltage, 5~20A/ of current density using Q235 carbon steels as anode
dm2, handle 15 minutes.
4. by Surface Creation the carbon steel of micro-arc oxidation films 800 DEG C carry out heat treatment 4 it is small when, and furnace cooling.
5. pair film obtained carries out structural characterization and performance test, product phenogram is similar with Fig. 1~Fig. 3, shows to produce
The successful preparation of product, the product are equally applicable to visible light photocatalytic degradation methylene blue, and degradation rate reaches 86%.
Embodiment 9：
1. pair 30CrMnSi alloys steel surface carries out deoiling cleaning.
2. prepare the electrolyte of the component containing following concentration：0.4mol/L sodium aluminates, 0.05mol/L sodium dihydrogen phosphates,
0.05mol/L sodium sulphate, 2g/L titania powders, 0.05mol/L sodium phosphates.
3. carry out differential arc oxidation processing, voltage 400V, current density 5A/dm using 30CrMnSi steel alloys as anode2, place
Reason 30 minutes.
4. by Surface Creation the steel alloy of micro-arc oxidation films 800 DEG C carry out heat treatment 6 it is small when, and furnace cooling.
5. pair film obtained carries out structural characterization and performance test, product phenogram is similar with Fig. 1~Fig. 3, shows to produce
The successful preparation of product, the product are equally applicable to visible light photocatalytic degradation methylene blue, and degradation rate reaches 88%.
Embodiment 10：
1. pair 30CrMnSi alloys steel surface carries out deoiling cleaning.
2. prepare the electrolyte of the component containing following concentration：0.6mol/L sodium aluminates and 0.08mol/L potassium dihydrogen phosphates,
0.08mol/L sodium sulphate, 10g/L titania powders, 0.1mol/L sodium phosphates, 0.03mol/L sodium pyrophosphates.
3. carry out differential arc oxidation processing, voltage 500V, current density 10A/dm using 30CrMnSi steel alloys as anode2,
Processing 50 minutes.
4. by Surface Creation the steel alloy of micro-arc oxidation films 800 DEG C carry out heat treatment 6 it is small when, and furnace cooling.
5. pair film obtained carries out structural characterization and performance test, product phenogram is similar with Fig. 1~Fig. 3, shows to produce
The successful preparation of product, the product are equally applicable to visible light photocatalytic degradation methylene blue, and degradation rate reaches 88%.
Embodiment 11：
1. pair Q235 carbon steels surface carries out deoiling cleaning.
2. prepare the electrolyte of the component containing following concentration：0.8mol/L sodium aluminates, 0.1mol/L sodium dihydrogen phosphates,
0.1mol/L sodium sulphate, 60g/L titania powders, 0.1mol/L sodium phosphates, 0.07mol/L sodium pyrophosphates, 0.2mol/L phosphorus
Acid dihydride ammonium.
3. carry out differential arc oxidation processing, voltage 600V, current density 20A/dm using Q235 carbon steels as anode2, processing 50
Minute.
4. by Surface Creation the carbon steel of micro-arc oxidation films 800 DEG C carry out heat treatment 4 it is small when, and furnace cooling.
5. pair film obtained carries out structural characterization and performance test, product phenogram is similar with Fig. 1~Fig. 3, shows to produce
The successful preparation of product, the product are equally applicable to visible light photocatalytic degradation methylene blue, and degradation rate reaches 89%.
Embodiment 12：
1. pair Q235 carbon steels surface carries out deoiling cleaning.
2. prepare the electrolyte of the component containing following concentration：0.8mol/L sodium aluminates, 0.1mol/L sodium dihydrogen phosphates,
0.1mol/L sodium sulphate, 60g/L titania powders, 5mol/L sodium phosphates, 1mol/L sodium pyrophosphates, 0.05mol/L di(2-ethylhexyl)phosphates
Hydrogen ammonium.
3. carry out differential arc oxidation processing, voltage 600V, current density 20A/dm using Q235 carbon steels as anode2, processing 50
Minute.
4. by Surface Creation the carbon steel of micro-arc oxidation films 800 DEG C carry out heat treatment 4 it is small when, and furnace cooling.
5. pair film obtained carries out structural characterization and performance test, product phenogram is similar with Fig. 1~Fig. 3, shows to produce
The successful preparation of product, the product are equally applicable to visible light photocatalytic degradation methylene blue, and degradation rate reaches 88%.
Embodiment 13:
1. pair Q235 carbon steels surface carries out deoiling cleaning.
2. prepare the electrolyte of the component containing following concentration：0.8mol/L sodium aluminates, 0.1mol/L sodium dihydrogen phosphates,
0.1mol/L sodium sulphate, 60g/L titania powders, 5mol/L sodium phosphates, 1mol/L sodium pyrophosphates, 0.1mol/L biphosphates
Ammonium.
3. carry out differential arc oxidation processing, voltage 600V, current density 20A/dm using Q235 carbon steels as anode2, processing 50
Minute.
4. by Surface Creation the carbon steel of micro-arc oxidation films 800 DEG C carry out heat treatment 4 it is small when, and furnace cooling.
5. pair film obtained carries out structural characterization and performance test, product phenogram is similar with Fig. 1~Fig. 3, shows to produce
The successful preparation of product, the product are equally applicable to visible light photocatalytic degradation methylene blue, and degradation rate reaches 87%.
Claims (5)
1. one kind oxidation Fe2O3 doping two-phase titanium deoxid film visible light catalyst preparation method, includes the following steps：
Step 1, the conventional surface cleaning for carrying out deoiling cleaning to steel material surface first；
Step 2, using steel material as anode, be placed in electrolyte solution, carry out differential arc oxidation processing；The differential arc oxidation is adopted
With the bi-directionally or uni-directionally pulse power, voltage is 400 ~ 600V, and current density is in 2 ~ 15A/dm2Between, 15 ~ 50min of reaction time；
Step 3, the steel sample that surface is had micro-arc oxidation films carry out simply cleaning and drying, and dried sample is carried out
Heat treatment, obtains target product；The heat-treating methods are：Using box heat treatment furnace, in air atmosphere, firing rate
Under the conditions of 8 ~ 10 DEG C/min, be heated to 800 DEG C, and keep the temperature 4 ~ 6 it is small when, cool to room temperature with the furnace；
It is characterized in that：To realize the purpose of steel surface differential arc oxidation film layer, in step 2, the electrolyte solution at least should
This includes each component of following concentration：0.1 ~ 0.8mol/L aluminates, 0.01 ~ 0.1mol/L dihydric phosphates, 0.01 ~
0.1mol/L sulfate, 10 ~ 60g/L titania powders.
2. a kind of oxidation Fe2O3 doping two-phase titanium deoxid film visible light catalyst preparation method according to claim 1,
It is characterized in that, in order to improve the quality of the stability of adjustment micro-arc oxidation process and film layer, electrolyte solution also contains phosphoric acid
At least one of salt, pyrophosphate, ammonium dihydrogen phosphate；Phosphate concn is 0 ~ 0.2mol/L, pyrophosphate concentration for 0 ~
0.1mol/L, biphosphate ammonium concentration are 0 ~ 0.2mol/L；The aluminate, dihydric phosphate, sulfate, phosphate, Jiao
Phosphate is sodium salt or sylvite.
3. a kind of oxidation Fe2O3 doping two-phase titanium deoxid film visible light catalyst preparation method according to claim 2,
It is characterized in that, electrolyte solution contains each component of following concentration：0.1 ~ 0.4mol/L sodium aluminates and 0.01 ~ 0.05mol/L
Sodium dihydrogen phosphate, 0.01 ~ 0.05mol/L sodium sulphate, 10 ~ 30g/L titania powders, 0 ~ 0.05mol/L sodium phosphates.
4. a kind of oxidation Fe2O3 doping two-phase titanium deoxid film visible light catalyst preparation method according to claim 2,
It is characterized in that, electrolyte solution contains each component of following concentration：0.6 ~ 0.8mol/L sodium aluminates and 0.08 ~ 0.1mol/L phosphorus
Acid dihydride potassium, 0.08 ~ 0.1mol/L sodium sulphate, 30 ~ 60g/L titania powders, 0.1 ~ 0.2mol/L sodium phosphates, 0.07 ~
0.1mol/L sodium pyrophosphates, 0.1 ~ 0.2mol/L ammonium dihydrogen phosphates.
5. the oxidation Fe2O3 doping two-phase titanium deoxid film prepared as the method described in claim 1 ~ 2, it is characterised in that described
Oxidation Fe2O3 doping two-phase titanium deoxid film be used for visible light photocatalytic degradation methylene blue.
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