Spectrum-controllable melanin material for water treatment and preparation method thereof

A technology of water treatment and melanin, which is applied in the field of water treatment, can solve the problem of low light energy collection efficiency and achieve good evaporation efficiency, high solar energy conversion efficiency, and good light absorption ability

Active Publication Date: 2021-09-17
陈鹏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, although several PDA-based photothermal materials have been studied to a certain extent, their light energy harvesting efficiency in water and solid states is not high.

Method used

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  • Spectrum-controllable melanin material for water treatment and preparation method thereof
  • Spectrum-controllable melanin material for water treatment and preparation method thereof
  • Spectrum-controllable melanin material for water treatment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 Preparation of PDA-1.

[0031] A spectrally adjustable melanin material for water treatment, the preparation method of which is as follows:

[0032] Under magnetic stirring for 20 minutes, 200 mg of camphorsulfonic acid was completely dissolved in 80 mL of deionized water to obtain a camphorsulfonic acid solution;

[0033] Then 200 mg of dopamine hydrochloride was dissolved in 20 mL of deionized water to obtain a dopamine hydrochloride solution;

[0034] Then, under stirring conditions, inject the dopamine hydrochloride solution into the camphorsulfonic acid solution within 5 seconds, stir for 8 to 16 hours, centrifuge and rinse with deionized water three times to obtain a spectrally regulated melanin material for water treatment of the same size, which is denoted as PDA-1, the particle size is 200nm-300nm.

Embodiment 2

[0035] Example 2 Preparation of PDA-2.

[0036] A spectrally adjustable melanin material for water treatment, the preparation method of which is as follows:

[0037] Under magnetic stirring for 20 minutes, 300 mg of camphorsulfonic acid was completely dissolved in 80 mL of deionized water to obtain a camphorsulfonic acid solution;

[0038] Then 200 mg of dopamine hydrochloride was dissolved in 20 mL of deionized water to obtain a dopamine hydrochloride solution;

[0039] Then, under stirring conditions, inject the dopamine hydrochloride solution into the camphorsulfonic acid solution within 5 seconds, stir for 8-16 hours, centrifuge and rinse with deionized water to obtain a spectrally adjustable melanin material for water treatment of the same size, which is recorded as PDA -2, the particle size is 200nm to 300nm.

Embodiment 3

[0040] Example 3 Preparation of PDA-3.

[0041] A spectrally adjustable melanin material for water treatment, the preparation method of which is as follows:

[0042] Under magnetic stirring for 20 minutes, 400 mg of camphorsulfonic acid was completely dissolved in 80 mL of deionized water to obtain a camphorsulfonic acid solution;

[0043] Then 200 mg of dopamine hydrochloride was dissolved in 20 mL of deionized water to obtain a dopamine hydrochloride solution;

[0044] Then, under stirring conditions, inject the dopamine hydrochloride solution into the camphorsulfonic acid solution within 5 seconds, stir for 8-16 hours, centrifuge and rinse with deionized water to obtain a spectrally adjustable melanin material for water treatment of the same size, which is recorded as PDA -3, the particle size is 200nm to 300nm.

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Abstract

The invention provides a preparation method of a spectrum-controllable melanin material for water treatment, the spectrum-controllable melanin material for water treatment and a cellulose membrane coated with the spectrum-controllable melanin material for water treatment. The preparation method comprises the following steps: completely dissolving camphorsulfonic acid in deionized water to obtain a camphorsulfonic acid solution; dissolving dopamine hydrochloride in deionized water to obtain a dopamine hydrochloride solution; under a stirring condition, rapidly injecting the camphorsulfonic acid solution into the camphorsulfonic acid solution; and stirring, centrifuging and washing with deionized water to obtain the spectrum-controllable melanin material for water treatment. The absorption spectrum of polydopamine (PDA) is adjusted through one-pot polymerization of dopamine hydrochloride and camphorsulfonic acid, the doping of camphorsulfonic acid does not influence the main structure and photo-thermal mechanism of the polymer, and non-thermal radiation is rarely found in a PDA system. A CM film is coated with the materials to prepare an evaporation device, the evaporation rate can reach 1.53 kgm <-2 > h <-1 >, and the solar energy conversion efficiency is high (about 88.6%) after one-time sun irradiation.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a spectrally adjustable melanin material for water treatment and a preparation method thereof. Background technique [0002] Clean water is a necessity for human survival and social development, but its access is insufficient. An effective acquisition channel in recent years is to obtain clean water from seawater and wastewater. [0003] It has been proven that solar energy can be converted into heat for seawater evaporation and water vapor for seawater and wastewater desalination. However, in the existing technology, the existing seawater desalination materials are often not resistant to salt and oil pollution, so there are problems such as salt deposition and limited use in polluted sea areas. [0004] The abundant functional groups of polydopamine (PDA), such as catechol, amine, and imine, etc., not only can be used to effectively remove organic pollutants, but also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/14C02F103/08
CPCC02F1/14C02F2103/08Y02A20/212
Inventor 乔晴陈鹏郭馨宇李昊天
Owner 陈鹏
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