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Preparation method of sisal hemp carbon fiber photocatalyst

A photocatalyst and sisal fiber technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of molybdenum disulfide retention and less MoS2 quantum dots, and achieve large specific surface area, Excellent adsorption and catalytic performance, good photothermal stability

Active Publication Date: 2017-10-17
TONGXIANG BEITE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the reports on molybdenum disulfide stay in the range of nanosheets. For MoS 2 There are relatively few reports on quantum dots

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of sisal carbon fiber photocatalyst, comprising the following steps:

[0033]Step 1: Preparation of sisal carbon fiber: soak sisal fiber with 5wt% NaOH aqueous solution for 20 hours, then rinse with water to neutrality, then soak with 5wt% diammonium hydrogen phosphate aqueous solution for 20 hours, remove and dry in the air; Put the pretreated and dried sisal fibers into a muffle furnace for step-by-step calcination: first raise the temperature to 200°C, keep it for 35 minutes, then raise the temperature to 800°C, keep it for 3 hours, at a rate of 5°C / min, and pass inert gas. After calcination and cooling, porous sisal carbon fibers are obtained.

[0034] Step 2: Put the sisal carbon fiber in step 1 in (NH 4 ) 2 S 2 o 8 Ultrasound in the solution for 2h, filter, wash with deionized water, soak in 95g / L NaOH solution for 6min, wash off the unreacted (NH 4 ) 2 S 2 o 8 .

[0035] Step 3: Preparation of molybdenum disulfide quantum dots: (NH ...

Embodiment 2

[0039] A preparation method of sisal carbon fiber photocatalyst, comprising the following steps:

[0040] Step 1: Preparation of sisal carbon fiber: soak sisal fiber with 5wt% NaOH aqueous solution for 24 hours, then rinse with water to neutrality, then soak with 5wt% diammonium hydrogen phosphate aqueous solution for 24 hours, remove and dry; Put the pretreated and dried sisal fibers into a muffle furnace for step-by-step calcination: first raise the temperature to 250°C, keep it for 30 minutes, then raise the temperature to 850°C, keep it for 2.5 hours, at a rate of 5.5°C / min, and pass inert gas. After calcination and cooling, porous sisal carbon fibers are obtained.

[0041] Step 2: Put the sisal carbon fiber in the step 1 in the (NH 4 ) 2 S 2 o 8 Ultrasound in the solution for 1.5h, filter, wash with deionized water, soak in 100g / L NaOH solution for 5min, wash off unreacted (NH 4 ) 2 S 2 o 8 .

[0042] Step 3: Preparation of molybdenum disulfide quantum dots: (NH ...

Embodiment 3

[0046] A preparation method of sisal carbon fiber photocatalyst, comprising the following steps:

[0047] Step 1: Preparation of sisal carbon fiber: soak sisal fiber with 5wt% NaOH aqueous solution for 28 hours, then rinse with water to neutrality, then soak with 5wt% diammonium hydrogen phosphate aqueous solution for 28 hours, remove and dry in the air; Put the pretreated and dried sisal fibers into a muffle furnace for step-by-step calcination: first raise the temperature to 300°C, keep it for 25 minutes, then raise the temperature to 900°C, keep it for 2 hours, at a rate of 6°C / min, and pass inert gas. After calcination and cooling, porous sisal carbon fibers are obtained.

[0048] Step 2: Put the sisal carbon fiber in the step 1 in the (NH 4 ) 2 S 2 o 8 Ultrasound in the solution for 1h, filter, wash with deionized water, soak in 105g / L NaOH solution for 4min, wash off unreacted (NH 4 ) 2 S 2 o 8 .

[0049] Step 3: Preparation of molybdenum disulfide quantum dots:...

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Abstract

The invention relates to the field of catalytic materials for waste water treatment, and discloses a preparation method of a sisal hemp carbon fiber photocatalyst. The preparation method comprises the following steps: firstly, calcinating sisal hemp into porous carbon fiber with strong adsorption effect, and loading titanium dioxide nanoparticles and molybdenum disulfide quantum dots onto porous carbon by adopting a sol-gel method to obtain a tri-compounded porous carbon material. Through the photocatalyst, not only can the energy gap of titanium dioxide be reduced, but also the transfer efficiency of electrons can be enhanced, the visible light response range of the catalyst can be extended, and the modified titanium dioxide photocatalyst has response to visible light with wavelength of more than or equal to 460nm. According to the preparation method, the high-efficiency utilization of resources can be realized by fully utilizing natural sisal hemp, thus meeting green ecological concept. The preparation method of chemically modified sisal hemp carbon fiber photocatalyst is simple in technology, low in cost, and applicable to industrial production.

Description

technical field [0001] The invention relates to the field of wastewater treatment catalytic materials, in particular to a preparation method of sisal carbon fiber photocatalyst. Background technique [0002] Water pollution has always been the environmental issue that people pay the most attention to. The types and discharge of wastewater are increasing year by year, and printing and dyeing wastewater has become one of the key pollution sources of the water system environment. At present, a variety of carbon materials have been synthesized and applied in the field of photocatalysis, including mesoporous carbon, graphene, carbon nanotubes, etc. However, considering the large-scale application of photocatalysts, high-performance photocatalytic materials prepared from renewable biomass can not only realize high value-added utilization of biomass, but also effectively reduce the cost of photocatalysts. Sisal carbon fiber is the product of high temperature pyrolysis of sisal f...

Claims

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Application Information

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IPC IPC(8): B01J27/051C02F1/30
CPCC02F1/30B01J27/0515C02F2305/10B01J35/39
Inventor 胡智文蒙均晶万军民王秉彭志勤
Owner TONGXIANG BEITE TECH CO LTD
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