无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2025, Vol. 57 ›› Issue (11): 130-136.doi: 10.19964/j.issn.1006-4990.2024-0578

• 催化材料 • 上一篇    

CuO-PMA异质纳米片的制备及其光催化还原二氧化碳研究

马彩梅1(), 金华2, 周文3   

  1. 1.新疆石河子职业技术学院,新疆 石河子 832000
    2.新疆天业集团,新疆 石河子 832000
    3.兰州大学化学化工学院,甘肃 兰州 730000
  • 收稿日期:2024-11-02 出版日期:2025-11-10 发布日期:2025-07-25
  • 作者简介:马彩梅(1981— ),女,硕士,副教授,主要研究方向为催化剂合成与应用;E-mail:120640025@qq.com

Study on preparation of CuO-PMA heterogeneous nanosheets and their photocatalytic CO2 reduction

MA Caimei1(), JIN Hua2, ZHOU Wen3   

  1. 1. Xinjiang Shihezi Vocational and Technical College,Shihezi 832000,China
    2. Xinjiang Tianye Group,Shihezi 832000,China
    3. College of Chemistry and Chemical Engineering,Lanzhou University,Lanzhou 730000,China
  • Received:2024-11-02 Published:2025-11-10 Online:2025-07-25

摘要:

构建纳米级异质结构是提高光催化还原二氧化碳能力的重要策略之一。采用溶剂热法制备得到氧化铜-磷钼酸(CuO-PMA)共组装纳米片结构,并进行结构表征和性能评价。首先采用透射电子显微镜、能谱仪、红外光谱仪、X射线光电子能谱仪和X射线衍射仪等仪器表征形貌、组成、结构和元素价态等,然后评价其光催化CO2还原性能,最后研究CuO-PMA异质纳米片的光催化CO2还原机理。结果表明,CuO-PMA异质纳米片为梭子形,长度约为1 μm,宽度约为100 nm,其由CuO与PMA组成。此外,和CuO与PMA相比,CuO-PMA异质纳米片具有较大的比表面积(52.03 m2/g)。在可见光照射下,CuO-PMA异质纳米片光催化还原CO2生成CH4和CO的速率分别为210.12、486.70 μmol/(g·h),分别是纯CuO和PMA的催化速率的8.4、10.2倍和2.5、2.3倍。CuO-PMA异质结构中载流子分离和传输性能提高,从而促进光化学CO2转化反应的产生,并以此得出相应的光催化CO2还原机制。

关键词: 光催化, 氧化铜, 多金属氧酸盐, CO2还原, 纳米片

Abstract:

Constructing nanoscale heterostructures is an important strategy to improve the photocatalytic reduction of carbon dioxide.Phosphomolybdic acid and copper oxide(CuO-PMA) co-assembled nanosheets were prepared by solvothermal method,and structural characterization and performance evaluation were conducted.Firstly,the morphology,composition,structure and element valence,etc.of the newly prepared composite materials were characterized by TEM,EDS,infrared spectroscopy,XPS and XRD.Then,their photocatalytic CO2 reduction performance was evaluated.Finally,the photocatalytic CO2 reduction mechanism of CuO-PMA was studied.The prepared nanosheets were shuttle shaped with a length of about 1 μm and a width of around 100 nm.The elemental characterization of the structure confirmed that the obtained nanosheets were composed of CuO and PMA.In addition,compared with CuO and PMA,CuO-PMA nanosheets had a larger specific surface area(52.03 m2/g).The rates of photocatalytic reduction of CO2 to CH4 and CO by CuO PMA under visible light irradiation were 210.12 μmol/(g·h) and 486.70 μmol/(g·h),respectively,which were 8.4,10.2 times and 2.5,2.3 times higher than those of pure CuO and PMA,respectively.The carrier separation and transport performance in CuO-PMA heterostructures was improved,thereby promoting the generation of electrochemical CO2 conversion reactions and deriving the corresponding photocatalytic CO2 reduction mechanism.

Key words: photocatalysis, CuO, polyoxometalate, CO2 reduction, nanosheets

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