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an α-fe 2 o 3 /bi 2 the w 6 Shell composite photocatalyst and preparation method thereof

A -fe2o3, composite light technology, used in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of low photocatalyst efficiency and high preparation cost, and achieve Improve photocatalytic performance, low cost, and improve the effect of photocatalytic environment

Active Publication Date: 2021-06-18
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of low efficiency and high preparation cost of existing photocatalysts, the present invention provides an α-Fe 2 o 3 / Bi 2 WO 6 Shell composite photocatalyst and preparation method thereof

Method used

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  • an α-fe <sub>2</sub> o <sub>3</sub> /bi <sub>2</sub> the w <sub>6</sub> Shell composite photocatalyst and preparation method thereof
  • an α-fe <sub>2</sub> o <sub>3</sub> /bi <sub>2</sub> the w <sub>6</sub> Shell composite photocatalyst and preparation method thereof
  • an α-fe <sub>2</sub> o <sub>3</sub> /bi <sub>2</sub> the w <sub>6</sub> Shell composite photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0043] Preparation of bismuth tungstate powder:

[0044] S1) Prepare 0.06-0.08mol / L sodium tungstate solution and 0.12-0.16mol / L bismuth salt solution respectively, and add the sodium tungstate solution dropwise into the bismuth salt solution to obtain a pre-solution;

[0045] S2) Add sodium lauryl sulfate to the pre-solution obtained in step S1), add 12-15 g of sodium lauryl sulfate per liter of pre-solution, mix well and let stand for 3-4 hours, then place it at 160-185 After drying at ℃ for 20-28 hours, filter out the precipitate, wash the precipitate with water until it becomes neutral, and then dry it to obtain bismuth tungstate powder.

[0046] The above specific preparation parameters are shown in Table 1 below.

[0047] The concrete preparation parameter of table 1 bismuth tungstate powder

[0048]

[0049]

[0050] The bismuth tungstate powder prepared in Examples 1 to 6 is detected and characterized, and the EDS diagram of the bismuth tungstate powder prepare...

Embodiment 7～12

[0053] Utilize the bismuth tungstate powder that embodiment 1~6 makes to prepare α-Fe 2 o 3 / Bi 2 WO 6 / shell composite photocatalyst, its specific steps include:

[0054] 1) Grinding the shells and sieving the shell powder with a particle size of 5-15 μm, as a carrier, dispersing the carrier in a molten organic dispersant;

[0055] 2) adding bismuth tungstate powder and iron source to the molten organic dispersant in step 1), mixing them evenly, and then water-cooling and solidifying to obtain a precursor;

[0056] 3) Burn the precursor at 450-550°C for 1-3 hours to obtain α-Fe 2 o 3 / Bi 2 WO 6 / shell composite photocatalyst.

[0057] The specific parameters in the preparation process are shown in Table 2 below.

[0058] Table 2 α-Fe 2 o 3 / Bi 2 WO 6 / Specific parameters for the preparation of shell composite photocatalysts

[0059]

[0060] For the prepared α-Fe 2 o 3 / Bi 2 WO 6 / shell composite photocatalysts were detected in which α-Fe 2 o 3 and Bi...

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Abstract

The invention relates to the field of photocatalysts. In order to solve the problems of low efficiency and high preparation cost of existing photocatalysts, the invention provides α-Fe 2 o 3 / Bi 2 WO 6 / shell composite photocatalyst and preparation method thereof. The composite photocatalyst uses shell powder as a carrier, and the carrier is connected with nano-Bi 2 WO 6 And in-situ growth of nano-α-Fe on the carrier 2 o 3 , and its α‑Fe 2 o 3 and Bi 2 WO 6 The contents are respectively 2.5-3.5wt% and 23-27.5wt%. The preparation method includes: 1) using shell powder as a carrier, dispersing the carrier in a dispersant; 2) adding bismuth tungstate and iron sources into the dispersant, mixing them uniformly and curing to obtain a precursor; 3) preparing the precursor The body is burned to obtain α‑Fe 2 o 3 / Bi 2 WO 6 / shell composite photocatalyst. The invention has wide sources of raw materials, low cost, simple process, easy operation and is suitable for large-scale production.

Description

technical field [0001] The invention relates to the field of photocatalysts, in particular to an α-Fe 2 o 3 / Bi 2 WO 6 / shell composite photocatalyst and preparation method thereof. Background technique [0002] From the perspective of today's world, photocatalysis is undoubtedly one of the most promising technologies. It shows us the application of solar energy in many aspects, such as photolysis of water to obtain hydrogen energy, for example, it can efficiently solve the problem of sewage treatment in the industry. Traditional photocatalysts are based on TiO 2 The representative metal oxides and sulfides, but the International Agency for Research on Cancer of the World Health Organization has on October 27, 2017, TiO 2 Included in the list of 2B carcinogens, and it can only be driven by ultraviolet light, which accounts for 4% of solar energy, and its efficiency is low. my country has abundant reserves of bismuth element, which is cheap, safe and non-toxic. The dev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/888C02F1/30C02F101/30
CPCC02F1/30B01J23/002B01J23/888C02F2101/308B01J35/33B01J35/39
Inventor 刘艳萍刘先勇李世杰陈庆国薛冰
Owner ZHEJIANG OCEAN UNIV
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