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An ultrathin single crystal zn 3 (oh) 4 (no 3 ) 2 Structured hydroxyzinc nitrate nanosheets and preparation method thereof

A technology of hydroxyzinc nitrate and nanosheets, which is applied in the field of nanomaterials, can solve the problems of large thickness, amorphous, heterogeneous, etc., and achieve the effects of low size dispersion, smooth surface, and high crystallinity

Active Publication Date: 2021-09-03
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] The first object of the present invention is to provide the ultrathin single crystal Zn that adopts described method to make 3 (OH) 4 (NO 3 ) 2 Hydroxyzinc nitrate nanosheets with a structure to solve the problems of amorphous, polycrystalline and heterogeneous phases and excessive thickness in the current synthesized ZHNs products

Method used

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  • An ultrathin single crystal zn <sub>3</sub> (oh) <sub>4</sub> (no <sub>3</sub> ) <sub>2</sub> Structured hydroxyzinc nitrate nanosheets and preparation method thereof
  • An ultrathin single crystal zn <sub>3</sub> (oh) <sub>4</sub> (no <sub>3</sub> ) <sub>2</sub> Structured hydroxyzinc nitrate nanosheets and preparation method thereof
  • An ultrathin single crystal zn <sub>3</sub> (oh) <sub>4</sub> (no <sub>3</sub> ) <sub>2</sub> Structured hydroxyzinc nitrate nanosheets and preparation method thereof

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Experimental program
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Embodiment 1

[0060] 50ml, 0.3M Zn(NO 3 ) 2 ·6H 2 After the O aqueous solution was prepared and mixed, in order to fully dissolve, the precursor solution was stirred with a magnetic stirrer at 30 °C for 30 min, and then loaded into a micro-injector. Before the experiment started, the air in the reaction device was exhausted with a large flow of nitrogen, and the water cooling system was turned on at the same time to carry out the water cooling process of circulating water, and the surface temperature of the solid phase receiving plate was controlled to maintain a stable value of about 40 °C, and then the ethylene concentration was adjusted. The gas flow rate is 0.6SLPM, the gas flow rate of oxygen is 5.4SLPM, and the gas flow rate of nitrogen is 9.TSLPM. After 10s, it is ignited at a distance of 15mm from the nozzle. In the presence of unstable phenomena such as diffusion and floating, turn on the micro-injector again, inject samples at a speed of 0.003SLPM, and bring the reactants into t...

Embodiment 2

[0065] Only the premix gas flow is changed. 50ml, 0.3M Zn(NO 3 ) 2 ·6H 2 After the O aqueous solution was prepared and mixed, in order to fully dissolve, the precursor solution was stirred with a magnetic stirrer at 30 °C for 30 min, and then loaded into a micro-injector. Before the experiment started, the air in the reaction device was exhausted with a large flow of nitrogen, and the water cooling system was turned on at the same time to carry out the water cooling process of circulating water, and the surface temperature of the solid phase receiving plate was controlled to maintain a stable value of about 40 °C, and then the ethylene concentration was adjusted. The gas flow rate is 0.4SLPM or 0.75SLPM, the gas flow rate of oxygen is 2.7SLPM or 5.8SLPM, and the gas flow rate of nitrogen gas is 8SLPM or 10.2SLPM. After 10s, it is ignited at a distance of 15mm from the nozzle. After fine-tuning, a flame zone is formed, and the flame is stable within 10 minutes Existence, no ...

Embodiment 3

[0068] Change the distance between the receiving plate and the reactor outlet and the temperature on the surface of the solid phase receiving plate. 50ml, 0.3M Zn(NO 3 ) 2 ·6H 2 After the O aqueous solution was prepared and mixed, in order to fully dissolve, the precursor solution was stirred with a magnetic stirrer at 40 °C for 30 min, and then loaded into a micro-injector. Before the start of the experiment, the air in the reaction device was exhausted with a large flow of nitrogen, and the water cooling system was turned on at the same time to carry out the water cooling process of circulating water, and the surface temperature of the solid phase receiving plate was controlled to maintain a stable value of about 70°C, and then the ethylene concentration was adjusted. The gas flow rate is 0.6SLPM, the gas flow rate of oxygen is 5.4 SLPM, the gas flow rate of nitrogen is 9.TSLPM, adjust the distance between the receiving plate and the reactor outlet to 5mm or 30mm, ignite a...

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Abstract

The invention discloses an ultra-thin single crystal Zn 3 (OH) 4 (NO 3 ) 2 Hydroxyzinc nitrate nanosheets of structure and preparation method thereof, the preparation method of the hydroxyzinc nitrate nanosheets is as follows with hexahydrate zinc nitrate Zn(NO 3 ) 2 ·6H 2 O is the precursor, through the improved premixed flame synthesis method, the carrier gas is used to bring the precursor into the flame zone, and after passing through the temperature gradient of the flame zone, it is deposited on the surface of the water-cooled solid phase receiving plate to prepare the Zn 3 (OH) 4 (NO 3 ) 2 Structured 2D materials of hydroxyzinc nitrate nanosheets. The preparation method of hydroxyzinc nitrate nanosheets of the present invention overcomes unfavorable factors such as uneven product morphology, too many impurity phases, complicated experimental operations, and harsh conditions in complex chemical synthesis methods, and at the same time synthesizes ultra-thin nano-scale hydroxynitric acid for the first time Zinc-based substances to obtain Zn with excellent performance 3 (OH) 4 (NO 3 ) 2 Nanosheets.

Description

technical field [0001] The invention belongs to the field of nanomaterials, in particular to an ultrathin single crystal Zn 3 (OH) 4 (NO 3 ) 2 Hydroxyzinc nitrate nanosheets with structure and preparation method thereof. Background technique [0002] Zinc hydroxynitrates (ZHNs) are a class of inorganic compounds with positively charged layers and exchangeable interlayer anions, mainly composed of two-dimensional building blocks linked by weak forces [1] , the insertion of nitrate groups leads to an increase in the interlayer distance, and this structure can also be considered as a brucite-like alternating structure of hydroxide layers and interlayer anions [2] , which makes it very similar to hydroxyl double salts (HDSs) and layered double hydroxides (LDHs) in terms of material properties and application research. For example: Based on the nitrate ion exchange reaction, a new inorganic drug delivery system (IAA-ZBS) was developed [3] . ZnO similar to precursor morphol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/64C30B29/22C30B7/14B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C30B7/14C30B29/22C30B29/64
Inventor 郭耸陈学兵张琳陈苗苗翁哲帆
Owner NANJING UNIV OF SCI & TECH
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