Preparation of palygorskite-Cd<sub>0.5</sub>Zn<sub>0.5</sub>S/Zn-Fe LDH composite and its photocatalytic performance

HU Meifeng; TANG Zhongjia; WEN Na; CHANG Yue; ZHA Fei

doi:10.13801/j.cnki.fhclxb.20220705.003

Volume 40 Issue 5

May 2023

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Article Navigation > Acta Materiae Compositae Sinica > 2023 > 40(5): 2794-2803

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-Cd_0.5Zn_0.5S/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

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Preparation of palygorskite-Cd_0.5Zn_0.5S/Zn-Fe LDH composite and its photocatalytic performance

doi: 10.13801/j.cnki.fhclxb.20220705.003

HU Meifeng¹,
TANG Zhongjia¹,
WEN Na¹,
CHANG Yue^{1, 2, 3
,
,},
ZHA Fei¹

1.
College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
2.
Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Lanzhou 730070, China
3.
Key Laboratory of Polymer Materials of Gansu Province, Lanzhou 730070, China

Funds: National Natural Science Foundation of China (21865031)

Received Date: 2022-05-18
Accepted Date: 2022-06-24
Rev Recd Date: 2022-06-21

Available Online: 2022-07-06

Publish Date: 2023-05-15

Abstract

Abstract

To solve easy photocorrosion of Cd_0.5Zn_0.5S, palygorskite (PGS) supported Cd_0.5Zn_0.5S/Zn-Fe layered double hydroxides (LDH) composites (PGS-Cd_0.5Zn_0.5S/Zn-Fe LDH) were prepared by a two-step hydrothermal method. The aim is to improve the separation efficiency of photogenerated carriers using Zn-Fe LDH and PGS. Its crystal phase, micromorphology and optical properties were characterized by XRD, SEM, TEM, UV-Vis DRS and PL. The electron microscope images show that the needle-like PGS and graininess Cd_0.5Zn_0.5S are attached on the surface of Zn-Fe LDH. UV-visible diffuse reflectance spectroscopies confirm that the PGS-Cd_0.5Zn_0.5S/Zn-Fe LDH has a wider absorption range than Cd_0.5Zn_0.5S. That absorption range has a red shift from 560 nm to 605 nm. The photocatalytic activity of PGS-Cd_0.5Zn_0.5S/Zn-Fe LDH is higher than those of Cd_0.5Zn_0.5S and Zn-Fe LDH in the degradation of crystal violet. The photocatalyst with mass ratio of PGS to Cd_0.5Zn_0.5S/Zn-Fe LDH of 50%, the removal rate of 20 mg/L crystal violet is 97.5% by 20 mg of PGS-Cd_0.5Zn_0.5S/Zn-Fe LDH for 60 min. ${\text{•}}{\rm{O}}_2^{-} $ and •OH groups are the main active species in photodegradatlon reaction. The photocatalytic activity of composite is well retained after five cycles. Meanwhile, the composite shows good photocatalytic activity in the degradations of various dyes including malachite green (MG), acid fuchsin (AF), Rhodamine B (RhB), methyl orange (MO) and methylene blue (MB).
- Cd_0.5Zn_0.5S/Zn-Fe LDH,
- palygorskite,
- photocatalyst,
- degradation,
- dye
Long Abstrsct
Innovation Points

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References(32)

References

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