| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Synthesis of ZnS-g-C3N4/C and Its Photocatalytic Performance for Tetracycline |
| WU Ruiqi1,2, LIU Chengbao1,2,3,*, CHEN Feng1,2,3, QIU Yongbin4, MENG Xianrong5, CHEN Zhigang1,2,3
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1 Jiangsu Key Laboratory for Environment Functional Materials, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu, China
2 School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu, China
3 Jiangsu Collaborative Innovation Center of Technology and Material for Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu, China
4 Jiangsu Province Ceramics Research Institute Co., Ltd., Yixing 214221, Jiangsu, China
5 Suzhou Institute of Environmental Science, Suzhou 215007, Jiangsu, China |
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Abstract A ternary ZnS-g-C3N4/C heterostructured composite was synthesized via a bio-templated thermal polymerization and solvothermal strategy to enhance photocatalytic activity. Carbon-modified g-C3N4 (g-C3N4/C) was first fabricated using crown daisy stems as biological templates and melamine as the precursor. Subsequently, ZnS nanoparticles derived from zinc acetate anhydrous and thiourea were uniformly deposited onto the g-C3N4/C matrix through solvothermal treatment, forming a well-integrated heterojunction structure. Comprehensive characterization via XRD, SEM, TEM, X-ray photoelectron spectroscopy, N2 adsorption-desorption test, and photoluminescence spectroscopy confirmed the composite’s homogeneous morphology, structural integrity, high specific surface area, and abundant active sites. The optimized g-C3N4/C sample with a 3∶1 mass ratio of precursor to bio-template exhibited a tetracycline hydrochloride degradation efficiency of 49.9% under visible light, outperforming pristine g-C3N4 by 1.76-fold. Further enhancement was achieved by incorporating 30wt% ZnS, yielding a tetracycline degradation efficiency of 61.2% (1.16 times higher than pure g-C3N4) with minimal activity loss (60.5% retention after four cycles), demonstrating exceptional stability. The improved performance could be attributed to synergistic effects between the heterojunction-mediated charge separation and carbon-induced electron transfer pathways.
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Published: 25 January 2026
Online: 2026-01-27
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2026, Vol. 40 
