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坡缕石-Cd0.5Zn0.5S/Zn-Fe LDH复合材料的制备及其光催化性能

胡美凤 唐忠家 文娜 常玥 查飞

胡美凤, 唐忠家, 文娜, 等. 坡缕石-Cd0.5Zn0.5S/Zn-Fe LDH复合材料的制备及其光催化性能[J]. 复合材料学报, 2023, 40(5): 2794-2803. doi: 10.13801/j.cnki.fhclxb.20220705.003
引用本文: 胡美凤, 唐忠家, 文娜, 等. 坡缕石-Cd0.5Zn0.5S/Zn-Fe LDH复合材料的制备及其光催化性能[J]. 复合材料学报, 2023, 40(5): 2794-2803. doi: 10.13801/j.cnki.fhclxb.20220705.003
HU Meifeng, TANG Zhongjia, WEN Na, et al. Preparation of palygorskite-Cd0.5Zn0.5S/Zn-Fe LDH composite and its photocatalytic performance[J]. Acta Materiae Compositae Sinica, 2023, 40(5): 2794-2803. doi: 10.13801/j.cnki.fhclxb.20220705.003
Citation: HU Meifeng, TANG Zhongjia, WEN Na, et al. Preparation of palygorskite-Cd0.5Zn0.5S/Zn-Fe LDH composite and its photocatalytic performance[J]. Acta Materiae Compositae Sinica, 2023, 40(5): 2794-2803. doi: 10.13801/j.cnki.fhclxb.20220705.003

坡缕石-Cd0.5Zn0.5S/Zn-Fe LDH复合材料的制备及其光催化性能

doi: 10.13801/j.cnki.fhclxb.20220705.003
基金项目: 国家自然科学基金(21865031)
详细信息
    通讯作者:

    常玥,博士,教授,硕士生导师,研究方向为功能材料的制备及应用 E-mail: cy70@sin.com

  • 中图分类号: O611.3;TB333

Preparation of palygorskite-Cd0.5Zn0.5S/Zn-Fe LDH composite and its photocatalytic performance

Funds: National Natural Science Foundation of China (21865031)
  • 摘要: 为解决Cd0.5Zn0.5S易光腐蚀的缺点,两步水热法制备了坡缕石(PGS)负载Cd0.5Zn0.5S/Zn-Fe 层状双金属氢氧化物(LDH)复合材料(PGS-Cd0.5Zn0.5S/Zn-Fe LDH),通过Zn-Fe LDH和PGS提高光生载流子的分离效率。利用XRD、SEM、TEM、UV-Vis DRS和PL对材料的结构、形貌及光学性能进行了表征。电镜图像显示,片状Zn-Fe LDH表面附着针状PGS与颗粒状Cd0.5Zn0.5S。紫外-可见漫反射光谱表明PGS-Cd0.5Zn0.5S/Zn-Fe LDH吸光区域比Cd0.5Zn0.5S宽,吸收边缘从560 nm红移至605 nm。PGS-Cd0.5Zn0.5S/Zn-Fe LDH在光催化降解结晶紫(CV)中表现出良好的光催化活性,催化活性高于Cd0.5Zn0.5S和Zn-Fe LDH。当PGS 与Cd0.5Zn0.5S/Zn-Fe LDH质量比为50%时,可见光照射60 min, 20 mg PGS-Cd0.5Zn0.5S/Zn-Fe LDH对20 mg/L结晶紫溶液的去除率为97.5%,${\text{•}} {\rm{O}}_2^{-}$、•OH是光催化降解的主要活性物种,且5次循环实验后仍然保持较高活性。此外,制备的复合材料对孔雀石绿(MG)、酸性品红(AF)、罗丹明B(RhB)、甲基橙(MO)、亚甲基蓝(MB)等染料均表现出较好的光降解效果。

     

  • 图  1  50%PGS-Cd0.5Zn0.5S/Zn-Fe LDH 3、Cd0.5Zn0.5S/Zn-Fe LDH 3、Cd0.5Zn0.5S、Zn-Fe LDH和PGS的XRD图谱

    Figure  1.  XRD patterns of 50%PGS-Cd0.5Zn0.5S/Zn-Fe LDH 3, Cd0.5Zn0.5S/Zn-Fe LDH 3, Cd0.5Zn0.5S, Zn-Fe LDH and PGS

    图  2  Zn-Fe LDH (a)、Cd0.5Zn0.5S (b)、Cd0.5Zn0.5S/Zn-Fe LDH 3 (c)、PGS (d)和50%PGS-Cd0.5Zn0.5S/Zn-Fe LDH 3 (e)的SEM图像;50%PGS-Cd0.5Zn0.5S/Zn-Fe LDH 3的TEM图像((f), (g))及EDS能谱图(h)

    Figure  2.  SEM images of Zn-Fe LDH (a), Cd0.5Zn0.5S (b), Cd0.5Zn0.5S/Zn-Fe LDH 3 (c), PGS (d) and 50%PGS-Cd0.5Zn0.5S/Zn-Fe LDH 3 (e); TEM images ((f), (g)) and EDS spectrum (h) of 50%PGS-Cd0.5Zn0.5S/Zn-Fe LDH 3

    图  3  不同光催化材料的紫外-可见漫反射光谱(a)和相应的禁带宽度图(b)

    α—Absorption coefficient; —Photon energy

    Figure  3.  UV-vis DRS (a) and band gap diagram (b) of different materials

    图  4  Zn-Fe LDH、Cd0.5Zn0.5S、Cd0.5Zn0.5S/Zn-Fe LDH及50%PGS-Cd0.5Zn0.5S/Zn-Fe LDH 3的光致发光光谱

    Figure  4.  PL spectra of Zn-Fe LDH, Cd0.5Zn0.5S, Cd0.5Zn0.5S/Zn-Fe LDH and 50%PGS-Cd0.5Zn0.5S/Zn-Fe LDH 3

    图  5  Cd0.5Zn0.5S、Zn-Fe LDH和Cd0.5Zn0.5S/Zn-Fe LDH复合材料对染料的光催化活性((a), (b))及光催化降解反应动力学(c)

    Figure  5.  Photocatalytic activity of Cd0.5Zn0.5S, Zn-Fe LDH and Cd0.5Zn0.5S/Zn-Fe LDH composites for dyes ((a), (b)) and photocatalytic degradation reaction kinetics (c)

    Ct—Concentration after time t of degradation; C0—Initial concentration; MB—Methylene blue; CV—Crystal violet; RhB—Rhodamine B; AF—Acid fuchsin; MG—Malachite green; MO—Methyl orange

    图  6  PGS-Cd0.5Zn0.5S/Zn-Fe LDH 3对CV的光催化活性(a)及50%PGS-Cd0.5Zn0.5S/Zn-Fe LDH 3对染料降解率(b)

    TC—Tetracycline

    Figure  6.  Photocatalytic activity of PGS-Cd0.5Zn0.5S/Zn-Fe LDH 3 on CV (a) and removal rate of 50%PGS-Cd0.5Zn0.5S/Zn-Fe LDH 3 for dyes (b)

    图  7  50%PGS-Cd0.5Zn0.5S/Zn-Fe LDH 3光催化循环实验

    Figure  7.  Photocatalysis cycle experiment of 50%PGS-Cd0.5Zn0.5S/ Zn-Fe LDH 3

    图  8  50%PGS-Cd0.5Zn0.5S/Zn-Fe LDH 3对混合染料的降解(a)及紫外-可见光谱(b)

    Figure  8.  Degradation of mixed dyes by 50%PGS-Cd0.5Zn0.5S/Zn-Fe LDH 3 (a) and UV-Vis spectra (b)

    图  9  Cd0.5Zn0.5S (a)和Zn-Fe LDH (b)的MS图谱

    Figure  9.  MS maps of Cd0.5Zn0.5S (a) and Zn-Fe LDH (b)

    C2—Space charge capacitance

    图  10  PGS-Cd0.5Zn0.5S/Zn-Fe LDH的活性物种捕获实验

    EDTA-2Na—Ethylenediamine tetraacetic acid disodium salt; BQ—Benzoquinone; IPA—Isopropyl alcohol

    Figure  10.  Trapping experiments for active species of PGS-Cd0.5Zn0.5S/Zn-Fe LDH

    图  11  PGS-Cd0.5Zn0.5S/Zn-Fe LDH光催化降解CV的机制

    NHE—Normal hydrogen electrode

    Figure  11.  Photocatalytic degradation mechanism of CV by PGS-Cd0.5Zn0.5S/Zn-Fe LDH

    表  1  Cd0.5Zn0.5S/Zn-Fe层状双金属氢氧化物(LDH)复合材料的命名

    Table  1.   Nomenclature of Cd0.5Zn0.5S/Zn-Fe layered double hydroxides (LDH) composites

    Sample Mass of Zn-Fe LDH/g Mass ratio of Cd0.5Zn0.5S to
    Zn-Fe LDH
    Cd0.5Zn0.5S/Zn-Fe LDH 1 0.052 7∶1
    Cd0.5Zn0.5S/Zn-Fe LDH 2 0.104 7∶2
    Cd0.5Zn0.5S/Zn-Fe LDH 3 0.156 7∶3
    Cd0.5Zn0.5S/Zn-Fe LDH 4 0.208 7∶4
    Cd0.5Zn0.5S/Zn-Fe LDH 5 0.260 7∶5
    下载: 导出CSV

    表  2  坡缕石(PGS)-Cd0.5Zn0.5S/Zn-Fe LDH复合材料的命名

    Table  2.   Naming of palygorskite (PGS)-Cd0.5Zn0.5S/Zn-Fe LDH composites

    SampleMass ratio of PGS/wt%Mass ratio of Cd0.5Zn0.5S/
    Zn-Fe LDH 3/wt%
    30%PGS-Cd0.5Zn0.5S/
    Zn-Fe LDH 3
    30100
    40%PGS-Cd0.5Zn0.5S/
    Zn-Fe LDH 3
    40100
    50%PGS-Cd0.5Zn0.5S/
    Zn-Fe LDH 3
    50100
    60%PGS-Cd0.5Zn0.5S/
    Zn-Fe LDH 3
    60100
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-05-18
  • 修回日期:  2022-06-21
  • 录用日期:  2022-06-24
  • 网络出版日期:  2022-07-06
  • 刊出日期:  2023-05-15

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