Green preparation method for metal oxide nano material

A technology of nanomaterials and oxides, applied in chemical instruments and methods, titanium oxide/hydroxide, nanotechnology, etc., can solve the problems of non-compliance with green synthesis and clean production, increase costs, etc., and achieve easy production and cost saving , a wide range of effects

Pending Publication Date: 2018-08-17
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the many types of metals, different metal oxide nanomaterials usually require different synthesis methods and processes. The synthesis of many nanomaterials usually requires organic molecules or polymers as additives, and subsequent complex procedures need to be added for Removal of organic molecules and polymers increases costs and does not meet the requirements of green synthesis and clean production

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  • Green preparation method for metal oxide nano material
  • Green preparation method for metal oxide nano material
  • Green preparation method for metal oxide nano material

Examples

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Effect test

Embodiment 1

[0048] 0.5mol / L of ZnSO 4 Mix 10ml of the solution with 10ml of 1mol / L NaSCN solution, and after fully reacting, add 12ml of 1mol / L NaOH. ZnSO 4 and NaSCN are equivalent, and the ratio of substances is 1:2; NaOH is excessive, and ZnSO 4 The substance ratio with NaOH is 1:2.4. After standing for 2 hours, filter with suction, wash the solid precipitate, and then dry it at 60°C to obtain the ZnO nanomaterial sample (if the sample is baked at 300°C for 2 hours, the sample is still ZnO). XRD and SEM of the sample (see figure 2 ) analysis is as follows, the detection result is flaky ZnO (JCPDS 65-3411), the length can reach 1μm, and the thickness is about 20nm.

[0049] Experiments have proved that this kind of flaky zinc oxide has good photocatalytic activity. This zinc oxide is a semiconductor material that has important applications in oxide thin-film solar energy; it can also be used as a filler material in composite materials.

Embodiment 2

[0051] 0.2mol / L NiSO 4 Mix 50ml of the solution with 100ml of 0.2mol / L KSCN solution evenly, and then add the mixed solution dropwise to 100ml of 0.2mol / L KOH aqueous solution. NiSO 4 It is equivalent to KSCN, and the molar ratio of the substance is 1:2; NiSO 4 The substance molar ratio with KOH is 1:2. After mixing evenly, let it stand for 3~6h. Then, centrifuge in a centrifuge at 4000r / min for 5min to separate the precipitate, wash it with deionized water and alcohol several times, and then dry it in a drying oven (50°C) to obtain light green β-Ni(OH) 2 precursor, again at 280 0 C and baked for 2h, the NiO nanomaterial sample can be obtained. XRD and SEM of the sample (see image 3 ) analysis is as follows, the test result is granular NiO (JCPDS 47-1049), the particle size is 30-70nm.

[0052] Experiments have proved that this nickel oxide nanomaterial can degrade organic matter well under the action of photocatalysis.

Embodiment 3

[0054] 0.05mol / L of Ti(SO 4 ) 2 Mix 50ml of the solution with 100ml of 0.1mol / L NaSCN solution evenly, and then add it to 75ml of 0.2mol / L NaOH solution. Ti(SO 4 ) 2 and NaSCN are equivalent, and the molar ratio of the substances is 1:4; Ti(SO 4 ) 2 The molar ratio of the substance to NaOH is 1:6. After mixing evenly, let stand for 2 hours, suction filter, wash, dry at 60° C., and bake at 300° C. for 2 hours to obtain a titanium oxide nanomaterial sample. XRD and SEM of the sample (see Figure 4 ) analysis is as follows, the detection result is very small particles, and the XRD analysis pattern has no signal peak, which is an amorphous amorphous material.

[0055] It can be used as a doping material to improve the performance of thin-film solar cells.

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Abstract

The invention belongs to the technical field of fine chemical engineering, and particularly relates to a green preparation method for metal oxide nano material. A 'metal ion-thiocyanide' system is used as a precursor, and reacts with aqueous alkali at the room temperature to form a product. The prepared metal oxide nano material is packed in a sealed manner to form the product. Various metal oxidenano materials, various metal oxide composite nano materials and doped nano materials can be synthesized. The preparation method has universality, the process is simple, conditions are gentle, cleanproduction and transportation can be realized, and production scale can reach industrial scale. The prepared metal oxide nano material can serve as an advanced functional material and a chemical novelmaterial, and application value is obtained in extensive fields.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a preparation method of metal oxide nanometer materials. Background technique [0002] Due to the effects of quantum size and small size, metal oxide nanomaterials can exhibit superior performance than metal oxide bulk materials, and even obtain special properties that bulk materials do not possess. At present, nanoscale metal oxides have been widely used in the fields of semiconductor materials, luminescent materials, catalytic materials, adsorption materials, supercapacitor materials, photoelectric conversion materials, and lithium battery electrode materials. Nanoscale metal oxides can also be used in composite materials, such as fillers, including the modification of resins, and are new fine chemical materials. [0003] In the field of synthesis of nanomaterials, two important aspects have been highly concerned by people. On the one hand, the synthesis of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B13/36B82Y40/00C01G9/02C01G53/04C01G23/04
CPCB82Y40/00C01B13/36C01B13/363C01G9/02C01G23/04C01G53/04C01P2004/32C01P2004/24C01P2002/72C01P2004/03
Inventor 徐伟夏鹏孙倩张辉
Owner FUDAN UNIV
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