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Preparation method and application of polypyrrole photothermal film for intercepting volatile organic compounds in water pollution

A technology for volatile organic compounds and water pollution, applied in water pollutants, water/sewage treatment, general water supply conservation, etc., can solve the problems that volatile organic compounds cannot be separated, and volatile biological organic compounds cannot be separated, so as to increase light absorption. area, improving photothermal conversion rate, and the effect of simple method

Active Publication Date: 2022-05-20
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problem that existing photothermal materials cannot separate volatile organic compounds existing in the form of synthetic organic compounds in water, nor can they separate volatile organic compounds produced by microbial metabolism in natural water, and provide Preparation method and application of polypyrrole photothermal film for intercepting volatile organic compounds in water pollution

Method used

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  • Preparation method and application of polypyrrole photothermal film for intercepting volatile organic compounds in water pollution
  • Preparation method and application of polypyrrole photothermal film for intercepting volatile organic compounds in water pollution
  • Preparation method and application of polypyrrole photothermal film for intercepting volatile organic compounds in water pollution

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specific Embodiment approach 1

[0043] Embodiment 1: A method for preparing a polypyrrole photothermal film for intercepting volatile organics in water body pollution according to this embodiment is carried out in the following steps:

[0044] Step 1. Spin-coat photoresist positive resist on the surface of the silicon wafer with a 1 μm oxide layer on the surface;

[0045] Step 2, preparing a square grid array structure with a side length of 5 μm by photolithography;

[0046] Step 3. Soak and elute the silicon wafer after photolithography in step 2 in a mixed solution composed of hydrogen fluoride and ammonium fluoride for 5 minutes to remove exposed silicon dioxide; wherein the volume ratio of hydrogen fluoride to ammonium fluoride is 7:1, so The mass concentration of hydrogen fluoride is 49%, and the mass concentration of ammonium fluoride is 40%;

[0047]Step 4, placing the silicon wafer after step 3 in a KOH solution with a mass concentration of 35% for treatment, the treatment temperature is 70° C. and ...

specific Embodiment approach 2

[0050] Specific embodiment two: the application of the polypyrrole photothermal film prepared by specific embodiment one is as follows:

[0051] The polypyrrole photothermal film prepared in Embodiment 1 is used to intercept phenol in water pollution. The specific process is: in the process of evaporating the phenol solution, the polypyrrole cone film prepared in Embodiment 1 is attached to an open glass container Seal the open end of the open end, and then buckle it upside down on the surface of the phenol solution to ensure that the phenol solution and the polypyrrole cone membrane are fully infiltrated and in contact. Light is injected from the bottom of the glass container and reaches the polypyrrole membrane to heat the evaporated water, which condenses on the wall of the glass container for recovery detection.

[0052] Comparative experiment; use different photothermal materials to carry out barrier test on the phenol solution with an initial concentration of 5 mg / L conf...

specific Embodiment approach 3

[0055] Specific Embodiment Three: A method for preparing a polypyrrole photothermal film for intercepting volatile organics in water body pollution according to this embodiment is carried out in the following steps:

[0056] Step 1. Spin-coat photoresist positive resist on the surface of the silicon wafer with a 1 μm oxide layer on the surface;

[0057] Step 2, preparing a square grid array structure with a side length of 20 μm by photolithography;

[0058] Step 3. Soak and elute the silicon wafer after photolithography in step 2 in a mixed solution composed of hydrogen fluoride and ammonium fluoride for 5 minutes to remove exposed silicon dioxide; wherein the volume ratio of hydrogen fluoride to ammonium fluoride is 7:1, so The mass concentration of hydrogen fluoride is 49%, and the mass concentration of ammonium fluoride is 40%;

[0059] Step 4, placing the silicon wafer after step 3 in a KOH solution with a mass concentration of 35% for treatment, the treatment temperature...

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Abstract

A preparation method and application of a polypyrrole photothermal film for intercepting volatile organic compounds in water body pollution. The invention belongs to the field of water resource purification materials. The purpose of the present invention is to solve the technical problem that existing photothermal materials cannot separate volatile organic compounds existing in the form of synthetic organic compounds in water, nor can they separate volatile organic compounds produced by microbial metabolism in natural water. The method of the present invention: 1. Spin-coat photoresist on the surface of a silicon wafer with a surface oxide layer; 2. Prepare a micron-scale grid array structure by photolithography; 3. Soak and elute in a silicon dioxide removal solution; 4. Place in KOH solution for processing; 5. Electrodeposit polypyrrole, and remove the template to obtain a polypyrrole film with a micron silicon cone structure on the surface. Or directly etch a silicon wafer without an oxide layer with a KOH solution, and then electrodeposit polypyrrole to obtain it. The photothermal material of the invention exhibits high photothermal conversion rate, good water purification effect and simple preparation process.

Description

technical field [0001] The invention belongs to the field of water resource purification materials, and in particular relates to a preparation method and application of a polypyrrole photothermal film for intercepting volatile organic matter in water body pollution. Background technique [0002] China is a country with severe water shortage. The seven major river systems of Haihe River, Liaohe River, Huaihe River, Yellow River, Songhua River, Yangtze River and Pearl River are all polluted to varying degrees. The regeneration of usable fresh water resources is the main challenge my country currently faces in the field of water purification. As a green, environmentally friendly and sustainable technology, solar water purification technology has broad application prospects in seawater desalination, water quality sterilization, freshwater regeneration and other fields. [0003] The process of purifying water by solar energy is actually a process of converting the sun's light en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12C02F1/14C02F101/30
CPCC02F1/14C02F2101/30Y02A20/212
Inventor 刘妍齐殿鹏王威徐洪波
Owner HARBIN INST OF TECH
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