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Synthetic method for NiO/ZnO porous flower-like structure and product thereof

A synthesis method and technology of composite materials, which are applied in the field of synthesizing multi-empty flower-like structures, can solve problems such as the synthesis technology of multi-empty flower-like structures that have not yet been found, and achieve the purpose of improving pH, enhancing crystallinity and porosity, and improving surface activity. Effect

Active Publication Date: 2018-12-14
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the synthesis methods of NiO / ZnO composite nanorods, nanoparticles, nanofibers and other zero-dimensional or one-dimensional structures have been reported in the literature, but the related synthesis technology of porous flower-like structures assembled from NiO / ZnO sheets has not been found.

Method used

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  • Synthetic method for NiO/ZnO porous flower-like structure and product thereof
  • Synthetic method for NiO/ZnO porous flower-like structure and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) 0.0742 g of nickel nitrate hexahydrate (Ni(NO 3 ) 2 . 6H 2 O) and 0.1503 g of zinc nitrate hexahydrate (Zn(NO 3 ) 2 . 6H 2 O) Add to 12 mL of DMF, 12 mL of water and 0.13 mL of acetone, stir for 0.5 h; add 0.0462 g of 2-aminoterephthalic acid and 0.0014 g of salicyl alcohol into the above mixed solution and stir 0.5 h, then add 0.1450 g of PVP and stir for 0.5 h to form a mixed solution;

[0031] (2) Transfer the mixed solution to the reaction kettle, keep it at 150 °C for 12 h, then centrifuge, wash and dry;

[0032] (3) The precursor was placed in a muffle furnace, and the temperature was raised from room temperature to 450 °C at a rate of 1 °C / min in an air atmosphere, and kept for 2 h. The sample was cooled with the furnace to obtain the product.

[0033] The XRD result of the product is as follows figure 1 As shown, it can be seen from the figure that all the diffraction peaks are consistent with the standard XRD card (44-1159; 36-1451), which proves t...

Embodiment 2

[0035] (1) Add 0.0891 g of Ni(NO 3 ) 2 . 6H 2 O and 0.1353 g of Zn(NO 3 ) 2 . 6H 2 O was added to 11 mL of DMF, 13 mL of water and 0.15 mL of acetone, and stirred for 0.5 h; then 0.0416 g of 2-aminoterephthalic acid and 0.0015 g of salicyl alcohol were added to the above mixed solution and stirred to 0.5 h, then add 0.1740 g of PVP and stir for 0.5 h to form a mixed solution;

[0036] (2) The mixed solution was transferred to a reaction kettle, kept at 140 °C for 13 h, then centrifuged, washed and dried.

[0037](3) Place the precursor in a muffle furnace, raise the temperature from room temperature to 430 °C at a rate of 1 °C / min in an air atmosphere, and keep it for 2 h. After the sample is cooled with the furnace, the product is obtained, and the NiO / ZnO sheet is assembled The resulting porous flower-like structure has a size of 2.8-2.9 μm.

Embodiment 3

[0039] (1) 0.1187 g of Ni(NO 3 ) 2 . 6H 2 O and 0.1052 g of Zn(NO 3 ) 2 . 6H 2 O was added to 10 mL of DMF, 14 mL of water and 0.17 mL of acetone, and stirred for 0.5 h; then 0.0500 g of 2-aminoterephthalic acid and 0.0017 g of salicyl alcohol were added to the above mixed solution and stirred for 0.5 h. h, and then add 0.2030 g of PVP and stir for 0.5 h to form a mixed solution.

[0040] (2) The mixed solution was transferred to a reaction kettle, kept at 130 °C for 7 h, then centrifuged, washed and dried.

[0041] (3) Place the precursor in a muffle furnace, raise the temperature from room temperature to 480 °C at a rate of 1 °C / min in an air atmosphere, and keep it for 3 h. After the sample is cooled with the furnace, the product is obtained, and the NiO / ZnO sheet is assembled The resulting porous flower-like structure is 2.2-2.4 μm in size.

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Abstract

The invention provides a synthetic method for a porous flower-like structure formed by assembling of NiO / ZnO sheets. The synthetic method comprises the following steps: adding a soluble nickel salt and a soluble zinc salt into a mixed solvent of N,N-dimethylamide, water and acetone and carrying out uniform mixing under stirring; adding an appropriate amount of 2-aminoterephthalic acid, salicyl alcohol and polyvinylpyrrolidone, and carrying out stirring to obtain a solution; after a solvothermal reaction, subjecting a reaction product to centrifugal separation, washing and drying so as to obtain a precursor; and subjecting the precursor to a thermal reaction so as to obtain a NiO / ZnO composite. According to the invention, a combination of the solvothermal reaction and heat treatment is adopted to obtain the porous flower-like structure assembled by NiO / ZnO composite micro-nanosheets; raw materials used in the invention are common reagents and are widely available; a product process is simple, and parameters are adjustable; and the prepared porous flower-like structure has special morphology, a narrow size distribution range and good repeatability, and shows potential application value in the fields of gas sensing, photocatalysis, etc.

Description

technical field [0001] The invention belongs to the field of organic small molecule fluorescent probes, and in particular relates to a method for synthesizing a porous flower-like structure assembled from NiO / ZnO sheets and a product thereof. Background technique [0002] As an important class of gas-sensing materials, semiconducting metal oxides can cause significant changes in resistance when detecting gases, thereby causing signal feedback of the detection current. The cost of raw materials of semiconductor metal oxides is generally low, the preparation method is simple, and the application range is wide. They play an irreplaceable role in pollution control and prevention and control of toxic and harmful gases. [0003] It has been found that NiO-based composite materials can produce good gas-sensing response characteristics to most organic or inorganic gases, and have great application potential in the field of environmental detection. For example, NiO / ZnO composites wi...

Claims

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Application Information

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IPC IPC(8): C01G53/04C01G9/02
CPCC01G9/02C01G53/04C01P2002/72C01P2004/03C01P2004/61C01P2004/82
Inventor 褚姝姝李绘马谦张进涛方圆王懿林紫琼张琪杨萍
Owner UNIV OF JINAN
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