DIAMOND AND RELATED MATERIALS
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2025
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IF 5.1
Liu Ouyang,Huihu Wang,Lizhong Duan,Jingle Zhang,Shenghao Jiang,Yu Xiong,Chenhuinan Wei,Xing Xiang,Yun Zhao,Qianyu Wang
Tetracycline (TC), a widely detected aquatic pollutant, poses significant ecological risks, necessitating the development of effective remediation strategies. Photocatalytic degradation, which converts TC into harmless CO 2 and H 2 O, offers a promising eco-friendly solution. This study successfully synthesized a novel 2D/3D g-C 3 N 5 /BiVO 4 (N-CN/BiVO 4 ) S-scheme heterojunction via a hydrothermal method. The optimized 5 % N-CN/BiVO 4 exhibited exceptional performance in activating the Fe 2+ /PMS system under visible light, achieving a 96.8 % TC removal efficiency with an apparent rate constant 4.4 times higher than that of BiVO 4 . Mechanistic studies, including ultraviolet photoelectron spectroscopy (UPS) and valence band X-ray photoelectron spectroscopy (VB-XPS), confirmed the S-scheme interfacial charge transfer pathway. Furthermore, radical quenching experiments revealed that the enhanced photocatalytic activity originated from the synergistic contribution of multiple reactive species ( OH, SO 4 − , O 2 − , h + , and 1 O 2 ), validating both the efficient activation of Fe 2+ /PMS and the proposed S-scheme charge transfer mechanism. This work presents an innovative approach for high-performance pollutant degradation by coupling an S-scheme heterojunction with the Fe 2+ /PMS activation system.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Lijia Huang,Jiao Shen,Yi Yuan,Yaoqi Huang,Ying Liang,Shaojun Yuan
The development of efficient photocatalysts for hydrogen sulfide (H 2 S) degradation under visible light remains a critical challenge due to constraints in light absorption efficiency and rapid electron-hole recombination. In this study, a novel dual S-scheme ternary heterojunction photocatalyst, In-TiO 2 @BiOBr@In-TCPP (IBP), was synthesized via a hydrothermal method for high-performance H 2 S desulfurization. Comprehensive characterization confirmed the successful formation of the heterostructure, where In-TiO 2 facilitated spontaneous H 2 S dissociation, BiOBr served as an efficient electron transport medium, and In-TCPP extended the light absorption spectrum to 1200 nm. The optimized IBP-3 demonstrated exceptional performance, achieving complete H 2 S degradation (100 %) within 120 min under visible light irradiation and retaining over 70 % efficiency even after 8 h of continuous operation. Mechanistic investigations revealed that the synergistic integration of In-TiO 2 , BiOBr, and In-TCPP enhanced visible light utilization, suppressed charge carrier recombination, and promoted reactive oxygen species (ROS) generation via internal electric fields (IEF) and S-scheme charge transfer pathways. This study not only presents the rational engineering of multi-component systems for designing advanced heterojunction photocatalysts to address industrial desulfurization challenges, but also emphasizes the potential of tailored heterostructures in advancing sustainable environmental remediation technologies.
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WATER RESEARCH
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2025
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IF 12.4
Cong Zhang,Zhipeng Zhang,Shuang Zhang,Yifeng Chen,Dunjie Li,Yongmei Li
Anaerobic co-digestion of sulfur-containing organic wastes with waste-activated sludge containing iron–phosphorus compounds (FePs) was recently suggested as an environment-friendly strategy to promote phosphate release, energy recovery, and hydrogen sulfide (H 2 S) control. Nevertheless, the mechanistic coupling between FePs speciation and the concurrent transformation of carbon, sulfur, iron, and phosphorus within this system remains to be fully elucidated. To address this knowledge gap, methionine, a typical hydrolysis product of sulfur-containing organics, and five FePs prevalent in sludge (ferric-phosphate tetrahydrate (FePO 4 ⋅4H 2 O), ferric-phosphate dihydrate (FePO 4 ⋅2H 2 O), vivianite (Fe 3 (PO 4 ) 2 ·8H 2 O), phosphate coprecipitated with Fe(III) (COP-P), and phosphate adsorption on hydrous ferric oxide (HFO-P)) were selected to elucidate C-S-Fe-P transformations in this study. The results showed that the H 2 S and methyl mercaptan productions decreased by >96% and >99%, respectively, while the methane production rate increased by 51.60–103.9% in the presence of FePs. The reaction between FePs and sulfide promoted the transformation of gaseous H 2 S and aqueous S 2− to solid sulfur species (elemental sulfur and iron sulfide precipitates), while simultaneously promoting the release of PO 4 3− from FePs. The formation of Fe(II) species derived from both abiotic sulfide-driven reduction and microbial-mediated iron reduction processes. The reduction rates of FePO 4 ⋅2H 2 O and FePO 4 ⋅4H 2 O were higher than those of COP-P and HFO-P, owing to their higher thermodynamic favorability. A negative correlation was observed between the Fe/P molar ratio and PO 4 3− release efficiency. FePO 4 (FePO 4 ⋅2H 2 O and FePO 4 ⋅4H 2 O) with the lowest Fe/P molar ratio achieved the highest P release efficiency (89.83–91.01%). Metagenomics analysis revealed that the SELENBP1 gene related to the degradation of methanethiol to sulfide was upregulated by 21.12–51.72% in the presence of FePs, and the genes involved in propionate metabolism, methylotrophic, and hydrogenotrophic methanogenesis were up-regulated concurrently. This study provides an in-depth understanding of C-S-Fe-P interactions and transformations during the anaerobic co-digestion of sulfur-containing organic wastes with FePs-containing sludge, helping to enhance methane production and the recovery of phosphorus and sulfur.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
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IF 21.1
Zhiyuan Ning,Xiangqian Tan,Qian Wei,Yue Liu,Ruigang Wang,He Guo,Jingyu Ren,Qiuling Ma,Jian Zhou,Tiecheng Wang
A nanoconfinement strategy was employed to encapsulate iron species within carbon nanotubes (Fe-CCNTs) in this study, enabling rapid degradation of sulfadiazine (SDZ) through sulfite (S(IV)) activation. The Fe-CCNTs catalyst enhanced the generation of reactive species during the S(IV) activation process. Nearly complete SDZ degradation was achieved within 10 min, with a reaction rate constant 1.8 times higher than that of the non-confined system. Fe-CCNTs shifted the mechanism from a radical pathway (SO 4 • − and •OH) to a non-radical pathway ( 1 O 2 and Fe IV =O), thereby improving SDZ degradation efficiency. The nanoconfinement effect increased the local charge density, accelerating electron transfer and promoting the formation of reactive species. This system exhibited strong catalytic performance, high reusability, and resistance to interference. Furthermore, the Fe-CCNTs/S(IV) treatment reduced the abundance of intestinal pathogenic bacteria and the toxicity of byproducts. The Fe-CCNTs/S(IV) system offers a promising and low-toxicity solution for antibiotic removal in water treatment.
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REACTIVE & FUNCTIONAL POLYMERS
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2025
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IF 5.1
Zhe Tian,Yu Dai,Chengkai Zhan,Yupeng Chen,Zhaolin Ding,Jiaqi Wu,Ruixiang Hou,Yongxiang Sun,Yajun Li,Wei He,Ning Zhu,Xin Hu,Yihuan Liu,Kai Guo
Poly(amino ester)s (PAEs) are widely employed in diverse applications, particularly biomedicine, owing to their tunable functionality via amine group modification and the inherent biodegradability and biocompatibility of their polyester chains. Herein, we reported (thio)urea/base-catalyzed ring-opening polymerization of proline-based lactones for well-defined poly(amino ester)s. A series of (thio)ureas and organic bases were synthesized and combined to form various binary organocatalysts to explore the structure-activity relationships. Monomer conversion up to 95 % was achieved within 5 min. Kinetics studies and chain extension experiments confirmed the living/controlled nature of ROP. Four well-defined PAEs with high molecular weights (3150–51,340 g mol −1 ) and narrow dispersity ( Đ < 1.29) were produced. The resultant PAEs showed high thermal stability ( T d,5% = 224–350 °C) and T m (189–244 °C). Furthermore, seven cationic random or block copolymers were synthesized through ring-opening copolymerization, followed by deprotection reaction. The effect of copolymer composition on the self-assembly behavior was investigated by DLS and TEM. Cationic random copolymers with high hydrophobic content demonstrated strong antimicrobial activity against E. coli, while those with high hydrophilic content were more active against S. aureus . This work would provide valuable insights into poly(amino ester)s and cationic polymers with tailored antimicrobial activity.
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JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2025
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IF 4.9
Jing Li,Ying-Xia Ma,Shi-Fan Chang,Wen-Jing Li,Rui-Xiang Wu,Zhi-Da Wang,Yu-Ting Chai,Fen Ran
Metal-organic frameworks (MOFs) exhibit promising prospects as supercapacitor electrode materials due to the high specific surface area, adjustable pore structure and flexible structural design, but suffer from low conductivity, unstable structure and easy collapse. In this work, by selecting nickel (Ⅱ) nitrate hexahydrate and 2-amino-5-mercapto-1,3,4-thiadiazole (EAMTD, containing various functional groups), a series of Ni-MOFs-EAMTD samples were fabricated in a mixed solvent system of N, N-dimethylformamide and ethylene glycol. EAMTD and mixed solvents provided a coordination environment rich in S, N and O heteroatoms for Ni ions, enhancing the delocalization of charge throughout the framework. The synergistic electronic interaction improved electrical conductivity and electrochemical performance of the Ni-MOFs-EAMTD, which demonstrated a high specific capacitance of 1608.0 F·g -1 at 1 A·g -1 . And assembled into an asymmetric supercapacitor (ASC) with activated carbon, it exhibited high energy density (39.2 Wh·kg -1 ) and power density (850.0 W·kg -1 ). More significantly, the ASC exhibits self-regenerative property. After 10000 cycles, the specific capacitance of ASC dropped to 45%, then recovered to 65%, which was attributed to the decomposition of Ni-MOFs-EAMTD into smaller nanoparticles and the release of active sites to compensate for the capacitance. This work provides a feasible strategy to develop MOFs-based electrode materials, paving the way for secondary resource utilization and extended industrial chain development.
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APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Shu Wang,Xin Li,Yiwei Wang,Wenlong Yang,Shuang Han,Hui Zhang
The persulfate (PMS)-activated photo-Fenton system has emerged as a promising solution for addressing severe environmental contamination, owing to its efficient generation of strongly oxidizing free radicals. Herein, we present a magnetically recyclable CdS/CoFe 2 O 4 S-scheme heterostructure with broad-spectrum response, demonstrating exceptional performance in degrading ciprofloxacin (CIP) and high-concentration rhodamine B (RhB). A mild synthesized strategy was used to construct CdS/CoFe 2 O 4 composite, meanwhile, experimental characterizations and theoretical calculations were combined to exhibit the phase structure, interface heterojunction, surface chemical state, energy band structure, surface photovoltage, charge transfer mechanism, and magnetic property. In our work, the best degradation rates of CIP and RhB are 5.63 μmol·min −1 ·g -1 cat. and 13.91 μmol·min −1 ·g -1 cat. , respectively, with the contribution order of reactants to be h + >·SO 4 - >·O 2 – >·OH, which proves a synergy effect on the production of reactive oxygen free radicals and available photogenerated charge to boost the photo-Fenton applications. This work opens a new avenue for the construction of low-cost, high-efficiency, and magnetic recycling semiconductor heterojunction for enhanced photo-Fenton applications.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Jian Gao,Shu Wang,Shuang Han,Wenlong Yang
The rational design and efficient utilization of room-temperature ferroelectric physical field photocatalysts are of significant importance for addressing energy and environmental challenges. In this work, ferroelectric-based Zn 0.5 Cd 0.5 S/PbTiO 3 S-scheme heterojunction photocatalyst was synthesized via a facile and mild two-step hydrothermal method. The heterostructure was constructed through in-situ selective growth of Zn₀.₅Cd₀.₅S nanoparticles onto the positively polarized surface of PbTiO₃ microplates. The underlying mechanism of this ferroelectric polarization-driven selective growth was systematically investigated through combined theoretical simulations and experimental analyses. Furthermore, the charge transfer behavior within the heterostructure, the synergistic enhancement mechanism of the built-in electric field, and the photocatalytic Cr(VI) reduction performance along with influencing factors were comprehensively examined via DFT calculations and a series of characterization techniques. Zn 0.5 Cd 0.5 S/PbTiO 3 S-scheme heterojunction catalyst integrates three key aspects for boosting photocatalytic efficiency, including the increased solar spectrum response, the enhanced photogenerated charge separation, and the improved surface chemical reaction. As a result, it exhibits an optimal Cr(VI) reduction rate of 15.16 μmol·min⁻¹ ·g⁻¹ , which is 5.5 times higher than that of pristine PbTiO₃. This provides a new design and application of the synergistic and enhanced effect on ferroelectric-based artificial-photosynthesized heterojunction catalyst.
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Results in Chemistry
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2025
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IF 4.2
Worku Lakew Kebede,Molla Tefera,Amogne Wondu,Melesse Ababay,Abrha Berhe,Mengistu Mulu,Atnafu Guadie
Water contamination caused by textile and industrial dyes is currently among the most important issues facing humanity that require urgent attention. Organic pollutants are harmful and can cause cancer in both humans and aquatic life. Even small amounts of these pollutants in water can lead to grave health problems. One promising way to clean up these pollutants is through degradation, using oxysulfide-based photocatalysts. These materials are effective because of their advanced optical and structural properties. The Sn-Mo(O,S) 3 catalysts were prepared through an easy precipitation process conducted at low temperatures. Different techniques were used to examine the catalyst's shape, structure, electrical properties, chemical makeup, and how it interacts with light. The Sn-Mo(O,S) 3 oxy-sulfide nanoparticle was successfully used to break down organic pollutants through photocatalytic processes. Among the samples made, the SMOS-25 catalyst showed the best performance in breaking down methylene blue dye. The effectiveness of the SMOS-25 catalyst was tested by seeing how well they could break down organic dye pollutant when exposed to visible light. The SMOS-25 nanoparticle was able to remove 98.9 % MB dye from water within 105 min under visible light. In this system, the main substance responsible for breaking down the dye is hydroxyl radical ( • OH).
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POLYMER
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2025
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IF 4.5
Zi’ang Yu,Gaoyun Qi,Zhenyu Jiang,Zhonglin Luo,Biaobing Wang
In this paper, a P/N/S multi-element flame retardant (TATP) was synthesized by 5-amino-1H-tetrazole, 2-thenaldehyde and DOPO. When TATP content reaches 4 wt%, EP/TATP-4 exhibits 38.1 % of LOI value and UL-94 V-0 rating. Compared to the pure EP, the peak of heat release rate, the total heat release and the total smoke production in cone calorimeter test are dropped by 30.8% and 32.4%, and 51.6% respectively. Moreover, the char residue is dramatically increased by 74.0%. Detailed analysis indicates, the tetrazole group decomposes from TATP firstly, which promotes the cleavage of thiophene ring below 380 o C, much lower than experimentally reported degradation temperature of thiophene compounds. Therefore, besides the emission of enough nonflammable gases, the high-energy density characteristics of the tetrazole ring is also benefited to the thermal decomposition of TATP and make the tetrazole, thiophene and DOPO groups play synergistic impacts on fire safety for epoxy resin. Furthermore, the P/N/S elements are found exerting flame retardant effects both in the gas and condensed phases. The obtained EP/TATP-4 maintains the comparable tensile and flexural properties to pure EP. Remarkably, EP/TATP-4 has high transparency and exhibits excellent UV shielding performance for UVA wavelengths, and has an extraordinarily higher Ultraviolet Protection Factor value of 1983.2.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Zhiru Yang,Zi Yang,Wentao Hou,Hai Zhou,Hao He,Chao Jin
Three-dimensional S-CN/NC/CNTs network composites were synthesized via a combined hydrothermal and high-temperature treatment strategy. And their electrochemical behavior as supercapacitor electrodes was investigated. Compared with conventional synthesis routes, this method provides distinct advantages. Cobalt and nickel nanoparticles catalyze the directional growth of carbon nanotubes (CNTs) from melamine, forming a uniform coating structure that significantly enhances the electrical conductivity of the electrode. Concurrently, the sulfidation of cobalt and nickel nanoparticles dispersed within the nitrogen-doped carbon (NC) matrix and CNT network generates abundant redox-active sites, thereby improving the specific capacitance. Within this composite, Co-Ni-S functions as the electrochemically active phase, NC serves as the structural scaffold, and CNTs form an interconnected three-dimensional conductive framework that facilitates efficient electron transport. The synergistic interaction among these components endows the material with superior electrochemical performance. The optimized composite exhibits a high specific capacitance of 2104 F g⁻¹ at 0.5 A g⁻¹ in 6 M KOH electrolyte. Furthermore, a flexible quasi-solid-state supercapacitor assembled using this material as the positive electrode, activated carbon as the negative electrode, and a gel polymer electrolyte achieves an energy density of 40.3 Wh kg⁻¹ at a power density of 750 W kg⁻¹ , maintaining 87.6 % capacitance retention after 5000 cycles at 10 A g⁻¹ with excellent mechanical flexibility. This study presents an effective route for enhancing the electrochemical performance of three-dimensional composite electrodes through hierarchical conductive network design and controlled active-site dispersion, offering valuable insights for the development of high-performance energy storage materials.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Yuhui Xie,Zipeng Xing,Xinyue Liu,Na Zhang,Zibin Wang,Zhenzi Li,Wei Zhou
S-scheme heterojunctions have garnered significant attention in the field of solar energy conversion, predominantly owing to their profound ability to facilitate charge carrier transfer and enhance photocatalytic activity. In this study, we introduce a novel hollow molybdenum dioxide containing oxygen vacancies@Nickel-Iron layered double hydroxide (MoO 2 -OV@NiFe-LDH) S-scheme heterostructure, designed to achieve effective charge separation and thereby enhance photothermal-photocatalytic performance. The photocatalytic hydrogen production efficiency under visible light is enhanced by a factor of 10.15 relative to pristine molybdenum dioxide (MoO 2 ). Additionally, the photocatalytic degradation efficiency for tetracycline is improved by 21.5 % compared to Nickel-Iron layered double hydroxide (NiFe-LDH). These enhancements are attributed to the S-scheme carrier transport pathways and a significant photothermal effect, as substantiated by diverse characterization tests and theoretical calculations. The S-scheme heterojunction promotes electron-hole separation, augments carrier transport, and enhances photo-oxidative reduction capabilities. This research presents an innovative approach for fabricating S-scheme heterojunctions with unique architectures that significantly improve photothermal and photocatalytic efficiencies.
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