Magnetic Ag2S/Ag/CoFe1.95Sm0.05O4 Z-scheme Heterojunction: Preparation and Its Photocatalytic Degradation Property

doi:10.15541/jim20220166

Abstract

Abstract:

Photocatalytic degradation of organic pollutants from water bodies can efficiently reduce the organic pollutants in wastewater, which has broad application prospects. In this study, using CoFe_1.95Sm_0.05O₄as a support, the Z-scheme heterojunction Ag₂S/Ag/CoFe_1.95Sm_0.05O₄was synthesized through a facile in situ deposition method followed by photo-reduction. Microstructure, phase structure, optical and magnetic properties of the samples were analyzed. Ag₂S/Ag/CoFe_1.95Sm_0.05O₄ composite exhibited the highest catalytic activity, which dynamic constant (k) was 1.96, 2.71 and 7.24 times higher than those of Ag₂S/Ag, Ag₂S and CoFe_1.95Sm_0.05O₄, respectively. Introduction of CoFe_1.95Sm_0.05O₄ could efﬁciently promote the separation efﬁciency of photogenerated charge carriers in Ag₂S/Ag. And •O₂^-and •OH^- were proved to be the main active substances in the photocatalytic process. In addition, the as-prepared Ag₂S/Ag/CoFe_1.95Sm_0.05O₄ composite could be quickly separated from the solution by an extra magnetic field after the photocatalytic reaction. Cyclic photodegradation test showed that the Ag₂S/Ag/CoFe_1.95Sm_0.05O₄ hybrid materials had the stable degradation ability and crystal structures in the photodegradation process. This research provides a useful approach to develop photocatalysts with high efficiency, narrow band gap and magnetism.

Key words: Ag₂S/Ag/CoFe_1.95Sm_0.05O₄, Z-scheme heterojunction, photocatalytic degradation, recycling

CLC Number:

TB333

CHEN Shikun, WANG Chuchu, CHEN Ye, LI Li, PAN Lu, WEN Guilin. Magnetic Ag₂S/Ag/CoFe_1.95Sm_0.05O₄ Z-scheme Heterojunction: Preparation and Its Photocatalytic Degradation Property[J]. Journal of Inorganic Materials, 2022, 37(12): 1329-1336.

Figures/Tables 7

Fig. 1 XRD patterns of different samples (a) and EDS pattern of Ag2S/Ag/CoFe1.95Sm0.05O4 (b)

Fig. 2 TEM (a) and HRTEM (b,c) images of Ag2S/Ag/CoFe1.95Sm0.05O4

Fig. 3 XPS survey spectra of different materials (a); Ag3d(b); S2p(c); Co2p (d); Fe2p(e); Sm3d (f) and O2p (g) XPS spectra of Ag2S/Ag/CoFe1.95Sm0.05O4

Fig. 4 UV-Vis absorption spectra (a) and plots of (αhν)2 versus hv (b) of samples

Fig. 5 Degradation curves of MO by different samples under visible light irradiation (a, c) and corresponding first-order kinetics (b, d)

Fig. 6 Magnetization curves of samples with inset showing the pictures of the solution after magnetic separation using an external magnetic (a), five cycling runs of the sample for MO degradation (b) and XRD patterns of Ag2S/Ag/CoFe1.95Sm0.05O4 before and after cyclic test (c)

Fig. 7 Photocatalytic degradation of Ag2S/Ag/CoFe1.95Sm0.05O4 by free radical capture (a), Mott-Schottky curves of samples (b), Valence-band XPS spectra of Ag2S, CoFe1.95Sm0.05O4 (c,d), EIS spectra of as-prepared samples (e), and the proposed photocatalytic degradation mechanism of MO over Ag2S/Ag/CoFe1.95Sm0.05O4(f)

References 40

[1]	SOLAKIDOU M, GIANNAKAS A, GEORGIOU Y, et al. Efficient photocatalytic water-splitting performance by ternary CdS/Pt-N-TiO₂ and CdS/Pt-N, F-TiO₂: interplay between CdS photocorrosion and TiO₂-dopping. Applied Catalysis B: Environmental, 2019, 254: 194-205. DOI URL
[2]	CHI C C, QU P P, REN C N, et al. Preparation of SiO₂@Ag@SiO₂@TiO₂ core-shell structure and its photocatalytic degradation. Journal of Inorganic Materials, 2022, 37(7): 750-756. DOI URL
[3]	ZHANG X, ZHANG C, JIANG W J, et al. Synthesis, electronic structure and visible-light catalytic performance of quaternary BiMnVO₅. Journal of Inorganic Materials, 2022, 37(1): 58-64. DOI
[4]	IKRAM S, ASHRAF F, ALZAID M, et al. Role of nature of rare earth ion dopants on structural, spectral, and magnetic properties in spinel ferrites. Journal of Superconductivity and Novel Magnetism, 2021, 34: 17451751.
[5]	CHEN S K, JIANG D C, ZENG G, et al. Dysprosium doped CoFe₂O₄with enhanced magnetic property and photodegradation activity of methyl orange. Materials Letters, 2021, 284: 128966. DOI URL
[6]	HAGIRI M, UCHIDA K, SASAKI M K, et al. Preparation and characterization of silver orthophosphate photocatalytic coating on glass substrate. Scientific Reports, 2021, 11(1): 13968. DOI PMID
[7]	MOHD T K, ABDULLAH A, MOHD S, et al. Effect of Ag₂S nanoparticles on optical,photophysical and electrical properties of P₃HT thin films. Luminescence, 2021, 36(3): 761-768. DOI URL
[8]	JIANG W, WU Z M, YUE X N, et al. Photocatalytic performance of Ag₂S under irradiation with visible and near-infrared light and its mechanism of degradation. RSC Advances, 2015, 5(31): 24064-24071. DOI URL
[9]	ZHAO W, DAI B L, ZHU F X, et al. A novel 3D plasmonic p-n heterojunction photocatalyst: Ag nanoparticles on flower-like p-Ag₂S/n-BiVO₄ and its excellent photocatalytic reduction and oxidation activities. Applied Catalysis B: Environmental, 2018, 229: 171-180. DOI URL
[10]	PRADYASTI A, KIM D H, BIUTTY M N, et al. Ag-Ag₂S hybrid nanoplates with unique heterostructures: facile synthesis and photocatalytic application. Journal of Alloys and Compounds, 2020, 8926: 154191.
[11]	PENG C, WU Z J. Preparation of α-Fe₂O₃/ZnFe₂O₄ composite powder and its photocatalytic degradation of methylene blue. Journal of Process Engineering, 2016, 16(5): 882-888.
[12]	ZENG Q H, ZHU Y M, TIAN W, et al. Recyclable CoFe₂O₄-Ag₂O magnetic photocatalyst and its visible light-driven photocatalytic performance. Research on Chemical Intermediates, 2017, 43: 4487-4502. DOI URL
[13]	SUN F J, ZENG Q H, TIAN W, et al. Magnetic MFe₂O₄-Ag₂O (M = Zn, Co, & Ni) composite photocatalysts and their application for dye wastewater treatment. Journal of Environmental Chemical Engineering, 2019, 7(2): 103011. DOI URL
[14]	ŠUTKA A, DÖBELIN N, JOOST U, et al. Facile synthesis of magnetically separable CoFe₂O₄/Ag₂O/Ag₂CO₃ nanoheterostructures with high photocatalytic performance under visible light and enhanced stability against photodegradation. Journal of Environmental Chemical Engineering, 2017, 5(4): 3455-3462. DOI URL
[15]	GAN L, XU L J, QIAN K. Preparation of core-shell structured CoFe₂O₄ incorporated Ag₃PO₄ nanocomposites for photocatalytic degradation of organic dyes. Materials and Design, 2016, 109: 354-360. DOI URL
[16]	FARHADI S, SIADATNASAB F. CoFe₂O₄/CdS nanocomposite: Preparation, characterization, and application in sonocatalytic degradation of organic dye pollutants. Chinese Journal of Catalysis, 2016, 37(9): 1487-1495. DOI URL
[17]	HE Y M, ZHANG L H, TENG B T, et al. New Application of Z-Scheme Ag₃PO₄/g-C₃N₄ composite in converting CO₂ to fuel. Environmental Science and Technology, 2015, 49(1): 649-656. DOI URL
[18]	LIU C, LIU F, HUANG F, et al. Preparation and photocatalytic properties of alga-based CDs-Cu-TiO₂ composite material. Journal of Inorganic Materials, 2021, 36 (11):1154-1162. DOI URL
[19]	XU Y G, ZHOU T, HUANG S Q, et al. Preparation of magnetic Ag/AgCl/CoFe₂O₄ composites with high photocatalytic and antibacterial ability. RSC Advances, 2015, 5(52): 41475-41483. DOI URL
[20]	LI J T, CUSHING S K, ZHENG P, et al. Solar hydrogen generation by a CdS-Au-TiO₂ sandwich nanorod array enhanced with Au nanoparticle as electron relay and plasmonic photosensitizer. Journal of the American Chemical Society, 2014, 136(23): 8438-8449. DOI URL
[21]	WANG Z P, LIN Z P, SHEN S J, et al. Advances in designing heterojunction photocatalytic materials. Chinese Journal of Catalysis, 2021, 42(5): 710-730. DOI URL
[22]	HOU Y H, HUANG Y L, HOU S J, et al. Structural, electronic and magnetic properties of RE³⁺-doping in CoFe₂O₄: a first-principles study. Journal of Magnetism and Magnetic Materials, 2017, 421: 300-305. DOI URL
[23]	HE D L, CHEN Y F, SITU Y, et al. Synthesis of ternary g-C₃N₄/Ag/γ-FeOOH photocatalyst: an integrated heterogeneous Fenton-like system for effectively degradation of azo dye methyl orange under visible light. Applied Surface Science, 2017, 425: 862-872. DOI URL
[24]	SHEN X F, YANG J Y, ZHENG T, et al. Plasmonic p-n heterojunction of Ag/Ag₂S/Ag₂MoO₄ with enhanced vis-NIR photocatalytic activity for purifying wastewater. Separation and Purification Technology, 2020, 251: 117347. DOI URL
[25]	ZHAO W, GUO Y, WANG S M, et al. A novel ternary plasmonic photocatalyst: ultrathin g-C₃N₄ nanosheet hybrided by Ag/AgVO₃ nanoribbons with enhanced visible-light photocatalytic performance. Applied Catalysis B: Environmental, 2015, 165: 335-343. DOI URL
[26]	JING H X, GAO M X, WANG X M, et al. Preparation and absorption properties of rare earth Ce³⁺ doped CoFe₂O₄ nanoparticles. Journal of Materials Research, 2018, 32(6): 449-454.
[27]	LIU Y, CHEN J J, ZHANG J F, et al. Z-scheme BiVO₄/Ag/Ag₂S composites with enhanced photocatalytic efficiency under visible light. RSC Advances, 2020, 10: 30245-30253. DOI URL
[28]	LIU Y, ZHANG T H, LI S S, et al. Geometric and electronic modification of the active Fe³⁺ sites of α-Fe₂O₃ for highly efficient toluene combustion. Journal of Hazardous Materials, 2020, 398: 123233. DOI URL
[29]	HELENA BRUNCKOVA, MARIA KANUCHOVA, HRISTO KOLEV, et al. XPS characterization of SmNbO₄ and SmTaO₄ precursors prepared by Sol-Gel method. Applied Surface Science, 2019, 473: 1-5. DOI URL
[30]	LI X Z, ZHANG Z S, YAO C, et al. Attapulgite-CeO₂/MoS₂ ternary nanocomposite for photocatalytic oxidative desulfurization. Applied Surface Science, 2016, 364: 589-596. DOI URL
[31]	SADOVNIKOV S I, GUSEV A I. Recent progress in nanostructured silver sulﬁde: from synthesis and nonstoichiometry to properties. Journal of Materials Chemistry, 2017, 5: 17617-17704.
[32]	BAI S, WANG L, LI Z, et al. Facet-engineered surface and interface design of photocatalytic materials. Advanced Science, 2017, 4: 1600216. DOI URL
[33]	SUN G S, XU H, LI X M, et al. Fabrication and characterization of visible-light induced photocatalyst Gd₂O₃/Ag₃VO₄. Reaction Kinetics, Mechanisms and Catalysis, 2010, 99: 471-484.
[34]	LIU C H, ZHOU Z D, YU X, et al. Preparation and characterization of Fe₃O₄/Ag composite magnetic nanoparticles. Inorganic Materials, 2008, 44(3): 291-295. DOI URL
[35]	LI X, KANG B, DONG F, et al. Enhanced photocatalytic degradation and H₂/H₂O₂ production performance of S-p CN/ WO_2.72 S-scheme heterojunction with appropriate surface oxygen vacancies. Nano Energy, 2021, 81: 105671. DOI URL
[36]	CHEN F F, WU C Y, WANG J N, et al. Highly efficient Z-scheme structured visible-light photocatalyst constructed by selective doping of Ag@AgBr and Co₃O₄ separately on {010} and {110} facets of BiVO₄: pre-separation channel and hole-sink effects. Applied Catalysis B: Environmental, 2019, 250: 31-41. DOI URL
[37]	DENG J M, XUE R T, HUANG C Y, et al. Preparation of Z-scheme Ag/AgBr/BiOBr composite photocatalyst for effective removal of organic pollutants. Chemical Physics, 2021, 548: 111228. DOI URL
[38]	XIONG J, LI X B, HUANG J T, et al. CN/rGO@BPQDs high-low junctions with stretching spatial charge separation ability for photocatalytic degradation and H₂O₂ production. Applied Catalysis B: Environmental, 2020, 266: 118602. DOI URL
[39]	TANG H, FU Y H, CHANG S F, et al. Construction of Ag₃PO₄/ Ag₂MoO₄ Z-cheme heterogeneous photocatalyst for the remediation of organic pollutants. Chinese Journal of Catalysis, 2017, 38: 337-347. DOI URL
[40]	LI L, WANG X, LAN Y, et al. Synthesis, photocatalytic and electrocatalytic activities of wormlike GdFeO₃ nanoparticles by a glycol-assisted Sol-Gel process. Industrial & Engineering Chemistry Research, 2013, 52: 9130-9136. DOI URL

Magnetic Ag₂S/Ag/CoFe_1.95Sm_0.05O₄ Z-scheme Heterojunction: Preparation and Its Photocatalytic Degradation Property

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 7

References 40

Related Articles 12

Recommended Articles

Metrics

Comments

[1]	YE Maosen, WANG Yao, XU Bing, WANG Kangkang, ZHANG Shengnan, FENG Jianqing. II/Z-type Bi₂MoO₆/Ag₂O/Bi₂O₃ Heterojunction for Photocatalytic Degradation of Tetracycline under Visible Light Irradiation [J]. Journal of Inorganic Materials, 2024, 39(3): 321-329.
[2]	LIU Peng, WU Shimiao, WU Yunfeng, ZHANG Ning. Synthesis of Zn_0.4(CuGa)_0.3Ga₂S₄/CdS Photocatalyst for CO₂ Reduction [J]. Journal of Inorganic Materials, 2022, 37(1): 15-21.
[3]	LIU Cai, LIU Fang, HUANG Fang, WANG Xiaojuan. Preparation and Photocatalytic Properties of Alga-based CDs-Cu-TiO₂ Composite Material [J]. Journal of Inorganic Materials, 2021, 36(11): 1154-1162.
[4]	XU Jingwei,LI Zheng,WANG Zepu,YU Han,HE Qi,FU Nian,DING Bangfu,ZHENG Shukai,YAN Xiaobing. Morphology and Photocatalytic Performance Regulation of Nd³⁺-doped BiVO₄ with Staggered Band Structure [J]. Journal of Inorganic Materials, 2020, 35(7): 789-795.
[5]	XU Shichao,ZHU Tianzhe,QIAO Yang,BAI Xuejian,TANG Nan,ZHENG Chunming. Fabrication of Z-scheme BiVO₄/GO/g-C₃N₄ Photocatalyst with Efficient Visble-light Photocatalytic Performance [J]. Journal of Inorganic Materials, 2020, 35(7): 839-846.
[6]	JI Bang, ZHAO Wenfeng, DUAN Jieli, MA Lizhe, FU Lanhui, YANG Zhou. Synthesis of TiO₂/WO₃ on Nickel Foam for the Photocatalytic Degradation of Ethylene [J]. Journal of Inorganic Materials, 2020, 35(5): 581-588.
[7]	QU Xiao-Fei, LIU Lu-Ying, LI Xue-Qin, DU Fang-Lin. Preparation of TiO₂: Er³⁺Hollow Spheres and Its Photocatalytic Properties [J]. Journal of Inorganic Materials, 2015, 30(2): 183-188.
[8]	LI Yue-Jun, CAO Tie-Ping, MEI Ze-Min. Preparation and Photocatalytic Properties of BaTiO₃/TiO₂ Heterostructured Nanofibers [J]. Journal of Inorganic Materials, 2014, 29(7): 741-746.
[9]	CAO Tie-Ping, LI Yue-Jun, WANG Chang-Hua. Preparation and Photocatalytic Property of NiO/ZnO Heterostructured Nanofibers [J]. Journal of Inorganic Materials, 2013, 28(3): 295-300.
[10]	LI Yue-Jun, CAO Tie-Ping, SHAO Chang-Lu, WANG Chang-Hua. Preparation and Photocatalytic Properties of γ-Bi₂O₃/TiO₂ Composite Fibers [J]. Journal of Inorganic Materials, 2012, 27(7): 687-692.
[11]	HE Yan, WANG Pan, DENG An-Ping, YANG Jing, HUANG Ying-Ping, YANG Yong. Preparation of CdS Nanoparticles with Reverse Micelle Method and Photo-degradation of Malachite Green Dye [J]. Journal of Inorganic Materials, 2010, 25(11): 1221-1227.
[12]	HOU Ya-Qi,ZHANG Gong,ZHUANG Da-Ming,WU Min-Sheng. Photo catalytic Degradation Properties of Titanium Oxide Film Prepared by Mid-frequency AC Magnetron Sputtering [J]. Journal of Inorganic Materials, 2004, 19(5): 1073-1079.