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Preparation method of gamma-Fe2O3 nano material

A nanomaterial, 9H2O technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as operator and environmental hazards, toxicity, and large amount of dimethylformamide used , to achieve the effect of high product purity, simple preparation method and few operation links

Inactive Publication Date: 2018-01-12
ZHEJIANG UNIV OF TECH
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Problems solved by technology

[0003] Chinese invention patent CN 104986804 A adopts Fe 3+ The salt is directly dissolved in dimethylformamide (DMF), stirred evenly to form a transparent solution, and then the solution is sintered at 150°C-280°C for 1-4 hours to obtain γ-Fe 2 o 3 Nanoparticles; Fe(NO 3 ) 3 9H 2 The mass ratio of O to dimethylformamide is 1:4, and dimethylformamide is used in a large amount, and it is toxic and has potential hazards to operators and the environment; in order to obtain high-purity γ-Fe 2 o 3 , the maximum sintering temperature is 280°C, and cannot be used in higher temperature environments

Method used

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  • Preparation method of gamma-Fe2O3 nano material
  • Preparation method of gamma-Fe2O3 nano material

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Experimental program
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Effect test

Embodiment 1

[0018] Embodiment 1: weigh 40 grams of Fe (NO 3 ) 3 •9H 2 0. Put 18 grams of L-tartaric acid into a glass beaker, then weigh 12 grams of water and pour it into the above-mentioned beaker, stir and dissolve with a glass rod to obtain a reddish-brown viscous liquid, put it into an oven at 88°C and dry it for 16 hours; then The dried solid was put into a muffle furnace and roasted at 350°C for 3 hours to obtain red powder sample 1, namely γ-Fe 2 o 3 Nanoparticles. Using the PNAlytical X'Pert X-ray diffractometer to analyze the crystal structure of sample 1, compared with the standard spectrum, only γ-Fe was detected 2 o 3 , the results are shown in the attached figure 1 , figure 1 To five samples prepared by embodiment 1 to embodiment 5 respectively, utilize PNAlytical X'Pert X-ray diffractometer to analyze their diffraction peaks, and with standard substance α-Fe 2 o 3 (PDF:33-0664) and γ-Fe 2 o 3 (PDF: 39-1346) and their crystal structures were compared, and the gra...

Embodiment 2

[0019] Embodiment 2: weigh 40 grams of Fe (NO 3 ) 3 •9H 2 O. Put 18 grams of L-tartaric acid into a glass beaker, then weigh 15 grams of water and pour it into the above-mentioned beaker, stir and dissolve with a glass rod until it becomes a reddish-brown viscous liquid, put it into a 90°C oven and dry it for 12 hours; then The dried solid was put into a muffle furnace and calcined at 380°C for 5 hours to obtain red powder sample 2. Using the PNAlytical X'Pert X-ray diffractometer to analyze the crystal structure of sample 2, compared with the standard spectrum, only γ-Fe was detected 2 o 3 , the results are shown in the attached figure 1 , the grain size calculated by using the strongest diffraction peak at 35.63° and the Scherer equation is 24 nanometers; the morphology of sample 2 is observed with a Hitachi S-4700II scanning electron microscope, and its grain size is about 50 nanometers. The results are shown in the attached figure 2 .

Embodiment 3

[0020] Embodiment 3: weigh 40 grams of Fe (NO 3 ) 3 •9H 2O. Put 18 grams of L-tartaric acid into a glass beaker, then weigh 15 grams of water and pour it into the above-mentioned beaker, stir and dissolve with a glass rod until it becomes a reddish-brown viscous liquid, put it into a 92°C oven and dry it for 12 hours; then The dried solid was put into a muffle furnace and calcined at 280° C. for 6 hours to obtain a red powder sample 3 . Using the PNAlytical X'Pert X-ray diffractometer to analyze the crystal structure of sample 3, compared with the standard spectrum, only γ-Fe was detected 2 o 3 , the results are shown in the attached figure 1 , using the strongest diffraction peak at 35.57° and the Scherer equation to calculate the grain size to be 18 nm.

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Abstract

The invention discloses a preparation method of a gamma-Fe2O3 nano material. The preparation method comprises the following steps: preparing red brown thick liquid from Fe(NO3)3-9H2O and L-tartaric acid through an aqueous phase reaction; drying the red brown thick liquid in an air blasting oven to obtain greyish-green solid powder; re-roasting the greyish-green solid powder in a muffle furnace toobtain gamma-Fe2O3 nanoparticles. According to the preparation method disclosed by the invention, gamma-Fe2O3 is prepared from Fe(NO3)3-9H2O and L-tartaric acid through an aqueous phase reaction; thepreparation method is simple, a few operation links are adopted, and the obtained product has high purity.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional materials, in particular to a simple γ-Fe 2 o 3 Preparation methods of nanomaterials. Background technique [0002] γ-Fe 2 o 3 It is a material with multiple functions, such as magnetic recording materials, catalysts, pigments, and drug delivery carriers. In γ-Fe 2 o 3 and its allomorphic α-Fe 2 o 3 When both can play a role, γ-Fe 2 o 3 The performance is better than α-Fe 2 o 3 , such as the photocatalytic degradation of H 2 S [J Am Ceram Soc. 2007; 90: 412-414.], with NH 3 Selective reduction of NO X [Catal Lett. 2013; 143:697-704.], Pb ion detection [Anal Chem.2016; 88: 906-914], CO 2 Hydrogenation reactions [PLoS ONE 2017; 12(8): e0182955.]. Therefore, the establishment of γ-Fe with easy-to-obtain raw materials and simple operation 2 o 3 The preparation method can meet the needs of many applications. [0003] Chinese invention patent CN 104986804 A adopts ...

Claims

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Application Information

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IPC IPC(8): C01G49/06B82Y30/00
Inventor 宁文生李贝王凯
Owner ZHEJIANG UNIV OF TECH
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