Purple phosphorus alkenyl humidity-sensitive sensor as well as preparation method and application thereof

A moisture sensitive sensor, phosphorene technology, applied in the field of humidity sensitive sensors, can solve problems such as limiting the development of the sensing field, achieve the effect of simple and easy to operate in the preparation process, realize large-scale production, and light and compact finished products

Pending Publication Date: 2022-05-13
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] So far, there has been no report of phosphorene as a humidity-sensitive material to prepare a method for preparing purple phosphorene-based humidity sensors, which limits its development in the field of sensing.

Method used

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  • Purple phosphorus alkenyl humidity-sensitive sensor as well as preparation method and application thereof
  • Purple phosphorus alkenyl humidity-sensitive sensor as well as preparation method and application thereof
  • Purple phosphorus alkenyl humidity-sensitive sensor as well as preparation method and application thereof

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preparation example Construction

[0036] A method for preparing a purple phosphorene-based humidity sensor provided by the invention comprises the following steps:

[0037] Step 1: Use the vacuum filtration method to combine graphene and phosphorene to form a heterojunction, use a tube furnace to anneal the phosphorene / graphene heterojunction, and then heat the phosphorene / graphene heterojunction Coating conductive silver glue on the junction and connecting silver wires as electrodes to prepare a phosphorene-based humidity sensor;

[0038] In step 2, the saturated saline solution is used to configure different humidity, and the sensing performance of the phosphorene-based humidity sensor is measured by using the humidity detection platform.

[0039] In step 1, the vacuum degree of vacuum suction filtration is -0.1~-1MPa, and the suction filtration time is 10-30min.

[0040] In step 1, the preparation method of the purple phosphorous block is chemical vapor phase transfer (CVT), the preparation methods of purp...

Embodiment 1

[0048] Set the power of the ultrasonic cell disruptor to 30%, and the effective time to 10 hours, and vacuum filter 0.5 mg of phosphorene. Using a tube furnace at 200 °C for 3 h, the annealing pretreatment was performed on the phosphorene / graphene heterojunction. Specific steps are as follows:

[0049] (1) Preliminary preparation

[0050] The massive purple phosphorus was prepared by chemical vapor transfer (CVT), the power of the ultrasonic cell breaker was set to 30%, and the effective time was 10 hours to break the massive purple phosphorus, and then the laser stripping method was used to prepare phosphorene. Graphene was prepared by chemical vapor deposition (CVD). Using vacuum filtration method, the vacuum degree of the suction filtration is -0.1MPa, and the suction filtration is 10min, and 0.5mg of phosphorene and graphene are prepared into a heterojunction, and the phosphorene / graphene is heated at 200°C for 3 hours in a tube furnace. The graphene heterojunction is p...

Embodiment 2

[0054] Set the power of the ultrasonic cell disruptor to 30%, and the effective time to 10 hours, and vacuum filter 1 mg of phosphorene. Using a tube furnace at 200 °C for 3 h, the annealing pretreatment was performed on the phosphorene / graphene heterojunction. Specific steps are as follows:

[0055] (1) Preliminary preparation

[0056] The massive purple phosphorus was prepared by chemical vapor transfer (CVT), the power of the ultrasonic cell breaker was set to 30%, and the effective time was 10 hours to break the massive purple phosphorus, and then the laser stripping method was used to prepare phosphorene. Graphene was prepared by chemical vapor deposition (CVD). Using vacuum filtration method, the vacuum degree of the suction filtration is -0.5MPa, and the suction filtration is 20min, and 1mg of phosphorene and graphene are prepared into a heterojunction, and the phosphorene / graphene is heated at 200°C for 3 hours in a tube furnace. The annealing pretreatment was perfo...

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Abstract

The invention discloses a purple phosphorus alkenyl humidity-sensitive sensor as well as a preparation method and application thereof, and belongs to the technical field of humidity-sensitive sensors. The humidity-sensitive sensor is composed of a purple phosphorus alkene/graphene heterojunction and an electrode located on the surface of the purple phosphorus alkene/graphene heterojunction. Different amounts of purple phosphorene and graphene films are prepared into heterojunctions by adopting a vacuum filtration method, conductive silver adhesives are coated on the purple phosphorene/graphene heterojunctions, silver wires are connected, the purple phosphorene-based humidity-sensitive sensor is prepared, a humidity-sensitive test platform is assembled, different humidity is prepared by adopting a saturated salt solution, and the humidity-sensitive test result is obtained. A sensitivity detection experiment is carried out under the condition that the humidity is relatively stable. The prepared purple phosphorus-based humidity-sensitive sensor is short in response time, high in humidity sensitivity and obvious in humidity induction.

Description

technical field [0001] The invention belongs to the technical field of humidity-sensitive sensors, and in particular relates to a phosphorene-based humidity-sensitive sensor and its preparation method and application. Background technique [0002] Purple phosphorus, also known as Hittoff's phosphorus, is a layered elemental phosphorus structure with unique electronic and optoelectronic properties. Zhang Jinying's research group at Xi'an Jiaotong University first reported the synthesis, characterization and exfoliation process of millimeter-scale purple phosphorus single crystals in 2019. Its research shows that the upper limit of hole mobility of purple phosphorus is located at 3000-7000cm 2 V -1 the s -1 Between, and the decomposition temperature of purple phosphorus is 52 ℃ higher than that of black phosphorus, which is the most stable phosphorus allotrope known so far. At the same time, phosphorene can be obtained by exfoliating purple phosphorus. As a two-dimensiona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
CPCG01N27/125
Inventor 叶晓慧陈萌瑧齐明张悦强豪郑希侯小江锁国权张荔杨艳玲
Owner SHAANXI UNIV OF SCI & TECH
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