C/Fe-FeVO4 composite photocatalyst as well as preparation method and application thereof
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A technology of composite light and catalyst, used in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve problems such as unsatisfactory visible light utilization rate and achieve good visible light response , stable performance, improve the effect of visible light absorption
Active Publication Date: 2017-09-22
QIQIHAR UNIVERSITY
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[0012] The object of the present invention is to propose a kind of C/Fe-FeVO 4 Composite photocatalyst and its preparation meth...
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specific Embodiment approach 1
[0036] Specific implementation mode one: as figure 1 As shown, this embodiment discloses a C / Fe-FeVO 4 The preparation method of composite photocatalyst, this method comprises the following steps:
[0037] Step 1. Mix glucose and ferrous gluconate, add deionized water and stir until clarification and dissolve all substances, place in a hydrothermal reaction kettle, react at 160°C for 8 hours, and take out the reaction kettle after it cools down naturally , followed by washing with deionized water and absolute ethanol, and vacuum-drying the washed precipitate to obtain the desired carrier carbon gel beads;
[0038] Step 2: Get the carbon rubber balls prepared in step 1 and add them to deionized water for ultrasonic treatment. After that, Fe(NO 3 ) 3 9H 2 O, NH 4 VO 3 and SDBS surfactant, after adding in the carbon rubber balls and mixing, continue to carry out ultrasonic treatment, then stir until fully mixed, use 2mol / LHNO 3 Or 1mol / LNaOH and then adjust the pH value o...
specific Embodiment approach 2
[0042] Specific embodiment two: this embodiment is a further description of specific embodiment one. In step one, the glucose and ferrous gluconate are mixed in a ratio of 1:0.6 by mass ratio, and deionized water is added and stirred until Clarify and dissolve all substances, the ratio of glucose to deionized water is (0.4-1g): (40-100mL), and the washed precipitate is vacuum-dried at 40° for 4 hours.
[0043] This embodiment is mainly judged according to the level of photocatalytic degradation effect of photocatalytic oxidation of ciprofloxacin, etc., under this condition, the removal rate of ciprofloxacin is relatively high.
specific Embodiment approach 3
[0044] Specific embodiment three: This embodiment is a further description of specific embodiment one. In step two, the ratio of the carbon rubber balls to deionized water is (0.4-1) g: (40-100) mL , the ultrasonic treatment time is 10min, Fe(NO 3 ) 3 9H 2 O, NH 4 VO 3 and SDBS surfactant, after adding in the carbon rubber balls and mixing, the time for continuing ultrasonic treatment is 10min, with 2mol / LHNO 3 Or 1mol / L NaOH to adjust the pH=3 of the solution.
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Abstract
The invention provides a C/Fe-FeVO4 composite photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of preparation of inorganic nano-materials. The preparation method comprises the following steps: mixing glucose and ferrous gluconate; adding de-ionized water and stirring until a solution is clarified; dissolving substances, putting the solution into a hydrothermal reaction kettle and reacting; after cooling, taking out a product from the reaction kettle; washing with the de-ionized water and absolute ethyl alcohol; drying washed sediment in vacuum to obtain a carbon colloidal ball; adding the carbon colloidal ball into the de-ionized water and carrying out ultrasonic treatment; taking Fe(NO3)3.9H2O, NH4VO3 and an SDBS (Sodium Dodecyl Benzene Sulphonate) surfactant; adding into the carbon colloidal ball and mixing; continually carrying out the ultrasonic treatment; adjusting the pH (Potential of Hydrogen) value of the solution to obtain a grey solution; putting the grey solution into a stainless steel reaction kettle and reacting under a hydrothermal condition; cooling to room temperature to obtain a muddy solution; centrifuging the muddy solution and washing with water and ethanol respectively, and drying to obtain a C/Fe-FeVO4 precursor; roasting the C/Fe-FeVO4 precursor to obtain C/Fe-FeVO4 composed of mesoporous nano-sheet-shaped structures. The C/Fe-FeVO4 composite photocatalyst provided by the invention is used for treating newly-developing micro-pollutants of ciprofloxacin and norfloxacin under visible light.
Description
technical field [0001] The present invention relates to a kind of C / Fe-FeVO 4 The composite photocatalyst and its preparation method and application belong to the technical field of inorganic nanometer material preparation. Background technique [0002] Iron vanadate belongs to an n-type semiconductor, FeVO 4 It is a new type of semiconductor photocatalyst with direct band gap, which can absorb visible light to degrade organic pollutants. There are four main crystal forms of ferric vanadate: triclinic, orthorhombic Orthogonal and monoclinic. Among them, the triclinic form can be obtained under normal pressure, while the other three crystal forms can only be obtained under high pressure. FeVO 4 It is used in high energy density lithium batteries, photocatalysts, catalytic hydrogen combustion, etc. [0003] FeVO 4 Semiconductor photocatalysts are photocatalysts that respond to visible light, and researchers are investigating their good photocatalytic performance unde...
Claims
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