JOURNAL OF CRYSTAL GROWTH
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2024
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IF 1.7
Mengran Sun,Jinlong Shi,Jindong Chen,Chunxiao Li,Jiyong Yao
Infrared nonlinear optical crystals are widely used in all-solid-state lasers as pivotal devices for laser frequency conversion. BaGa 4 Se 7 (BGSe) crystal has attracted much attention due to its excellent optical properties. However, the presence of point defects in BGSe increases the absorption loss and reduces the laser-induced damage threshold, thus limiting its practical application in high-power mid- and far-infrared lasers. Therefore, it is crucial to reveal the types of defects and their formation mechanisms in BGSe crystal, which is conducive to the design of rational strategies to improve the crystal quality. In this work, the defect activation energies were calculated by photoluminescence (PL) spectroscopy and the existence of three types of defects, Ga Ba , V Se and V Ba were verified in the as grown BGSe crystal. Therefore, a thermal annealing process under BaSe vapor was rationally designed to compensate for the loss of Ba and Se elements and to reduce the defect concentration in BGSe. In addition, the changes of defects in BGSe crystal were determined by X-ray photoelectron spectroscopy (XPS) and photoluminescence (PL) spectroscopy. All the experimental results confirm that the defect concentration in BGSe decreases greatly and the crystal quality is significantly improved after annealing in BaSe vapor.
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JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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2024
·Vol. 99
·期 12
·2665-2676
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IF 2.8
Yongming Wang,Qiang Chen,Yuezong Su,Yuxuan He,Jin Qian,Kailin Xu
BACKGROUND The increasing presence of antibiotics in aquatic environments poses significant ecological risks, with sulfamethoxazole (SMX) being a prominent example due to its persistence and widespread use in medical and veterinary practices. Advanced oxidation processes, particularly those based on peroxymonosulfate (PMS), have shown promise in degrading such contaminants. This work explored the efficacy of a bimetallic selenide catalyst, FeSe 2 /MoSe 2 (FM), synthesized via a hydrothermal method, for the rapid activation of PMS and subsequent degradation of SMX. RESULTS Over 95% SMX degradation was achieved with a 0.25 g/L catalyst dosage and 1.5 g/L PMS dosage, demonstrating that FM was an effective PMS activator capable of efficiently oxidizing SMX. The EPR tests and quenching experiments confirmed the presence of 1 O 2 , SO 4 •– and • OH in the degradation system, with SO 4 •- predominating. The redox cycling of Mo with Fe was involved in the activation of PMS. Moreover, the DFT calculations of the SMX molecule revealed that the vulnerable sites were mainly in the vicinity of the sulfonamide group and the oxygen-containing group. The toxicity assessment disclosed that most of the primary degradation intermediates of SMX were toxic, while the further small molecule products were non-toxic. CONCLUSION This work underscores the potential of the FM/PMS system as an efficient and sustainable solution for degrading antibiotic contaminants like SMX in water. The low toxicity of the final degradation products further supports the environmental safety of this approach, making it a promising candidate for real-world water treatment applications. © 2024 Society of Chemical Industry (SCI).
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Dafeng Zhang,Dong Zhang,Yutong Zhao,Fuping Zhao,Xipeng Pu,Hengshuai Li,Junchang Liu,Xue-Yang Ji
The rational design of excellent visible light photocatalysts that efficiently utilize the solar spectrum is urgently needed. In this work, ZnIn 2 S 4 (ZIS) and Co 3 Se 4 (CS) were coupled by a multistep process involving simple ultrasonic self-assembly and calcination to form ZnIn 2 S 4 /Co 3 Se 4 (ZIS/CS) photocatalysts with synergistic S-scheme heterojunctions and photothermal effects, which realized efficient photocatalytic hydrogen (H 2 ) production with optimal H 2 yield of 2.46 mmol h −1 g −1 , superior to pure ZIS (0.47 mmol h −1 g −1 ) by a factor of 5.23. The excellent cyclic stability and wide environmental adaptability to the ionic environment of water of ZIS/CS were proved. The positive impaction of photothermal effect on the H 2 yield of ZIS/CS was investigated and confirmed by the temperature change of photocatalysts powder or photocatalytic system under light irradiation. In addition, based on a series of characterization analyses and first-principle simulation calculations, a charge transfer pathway for ZIS/CS S-scheme heterojunctions was proposed. This work provides valuable ideas and feasible research methods for the design of stable and practical photocatalysts.
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CRYSTAL GROWTH & DESIGN
·
2025
·
IF 3.4
Yiran Wu,Jinyang Liu,Yulong Lian,Yuzhen Lian,Hongbing Cai
One-dimensional multisegment nanostructures, with their unique physicochemical properties and broad application potential in optoelectronics, have garnered significant attention. However, current synthesis methods face challenges, including strict catalyst requirements, limited control over segment dimensions, and difficulties in achieving scalable and precise fabrication. These obstacles hinder the exploration of size-dependent physical properties and advanced applications. Here, we present a catalyst-free incommensurate heteroepitaxial growth method to synthesize Sb2Se3 multisegment homostructured nanowires. Using dashed-line-like nanowires synthesized in the first step as templates, our method achieves precise control over the segment number (three to nine) and diameter, forming homostructures with distinct physical properties. The Sb2Se3 nanowires grow along the [001] direction, and their anisotropic characteristics were confirmed by angle-resolved polarization Raman spectroscopy (ARPRS). The Sb2Se3 nanowires were applied in polarization-sensitive photodetectors, demonstrating a high dichroic ratio (∼1.7) and strong anisotropic photocurrent responses. This approach provides a versatile and scalable solution for fabricating multisegment nanostructures with tailored properties, paving the way for the further exploration of size-dependent phenomena and their integration into advanced anisotropic optoelectronic devices.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhi-Hui Xie,Yao Luo,Runjia Liu,Jilan Long,Liang Wu,Ke Wang,Chuan-Jian Zhong
Conventional micro-arc oxidation (MAO) coating on lightweight alloy displays innumerable micron-sized through-holes, severely restricting its corrosion protection in many industrial applications. To address this problem, we demonstrated a new strategy by creating a highly corrosion-resistant composite coating on magnesium alloy. The composite coating comprises a micrometer-scale MAO primer and a sub-micrometer-sized sulfur-selenium (S-Se) alloy top layer. The underlying MAO layer is incorporated with metal–organic framework (MOF) nanoparticles, including inhibitor-loaded zeolitic imidazolate framework-8 (ZIF-8) nano-containers. The thin S-Se film was fabricated by dip coating in a dimethylsiloxane-containing melt. The composite coating (S-Se/MOFs/MAO) with a thin thickness showed a tremendously increased charge transfer resistance and an ultralow corrosion current density down to 0.273 nA cm −2 , demonstrating remarkably superior corrosion protection in comparison with the unmodified and other MAO-based coatings reported to date. The origin of this unprecedented corrosion protection was mainly attributed to a combination of the inhibition by the released inhibitor and the structural integration resulting from the nanoparticle incorporation. Notably, the effective pore sealing via the strongly adhesive S-Se alloy thin film to the MgO layer through chemical bonding played an essential role in enhanced corrosion protection, supported by density functional theory calculation.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Yi Wang,Yuxin Wang,Yueting Wang,Jin Zhao,Yang Gao,Jingyi Liang,Tianjun Hu,Baoliang Lv,Ergui Luo,Jianfeng Jia
Carbon-based metal-free materials are emerging as leading candidates to replace noble-metal catalysts in the oxygen reduction reaction (ORR). Herein, we introduce a facile secondary carbonation technique for fabricating Se and N co-doped metal-free catalysts using a zeolite imidazole framework (ZIF-8) as the precursor. The optimal electrocatalyst, designated SeNC-900, exhibited good ORR performance under both alkaline and acidic conditions, with half-wave potentials of 0.864 V and 0.731 V (vs. RHE), respectively. Density functional theory (DFT) calculations reveal that the enhanced activity of SeNC-900 originates from Se doping, which triggers an increase in the intrinsic defects of sp 3 -hybridized C. Concurrently, the sp 3 -hybridized C, in concert with Se dopant, modulates the electronic structure of the active C atoms. This work not only underscores the significance of tuning the electronic structure to boost catalytic performance by enriching intrinsic defects but also presents a fresh insight into the effect of heteroatom doping on carbon-based materials for electrocatalysis.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
·
IF 20.2
Wencong Sun,Li Zhou,Wenxue Tian,Shumiao Li,Min Yang,Chunxiang Li
Highly active noble metals and developed modified electrocatalysts are limited in terms of economy and kinetics for the electrocatalytic CO 2 reduction reaction (ECO 2 RR), respectively. Herein, different bimetallic chalcogenides (CuInSe 2 , CuInS 2 , AgInS 2 ) were found to have the ability to prepare proportionally tunable syngas in PV 3 Mo 9 medium at an ultra-low onset potential of −0.1 V (vs. RHE). The ECO 2 RR system established by CuInSe 2 and PV 3 Mo 9 achieved the widest CO/H 2 range (1.0–5.1), with a maximum j CO of −29.3 mA·cm −2 . The PV 3 Mo 9 medium had a positive effect on reducing the onset potential and improving the reaction kinetics. Theoretical calculations illustrated that the high activity of CuInSe 2 in PV 3 Mo 9 medium depended on the metal-like characteristic generated by the interaction of bimetallic orbitals and the mild regulation of *CO adsorption energy . This work demonstrates the broad application prospects of bimetallic chalcogenides in POM media in terms of ECO 2 RR activity and economic benefits.
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Journal of Energy Storage
·
2024
·
IF 8.9
Guoxian Gu,Jinjin Wen,Huiting Xu,Yufen Zhang,Meng Li,Haonan Zhai,Wenyue Yang,Chunli Li,Honghai Wang,Wenchao Peng,Jiapeng Liu
Recently, the aqueous zinc‑tellurium (Zn Te) batteries have garnered a lot of interest as a result of their unique conversion mechanism, low cost, and innate safety. Nevertheless, Zn Te batteries still possess an inevitable disadvantage which is their slow reaction kinetics. Herein, this work proposes a new strategy to accelerate the reaction kinetics by introducing the molybdenum diselenide@reduced graphene oxide (MoSe 2 @rGO) hybrid in Zn Te batteries. The MoSe 2 @rGO hybrid not only can serve as tellurium (Te) hosts on account of the unique hierarchical structure, but also can significantly promote the reaction kinetics due to the catalytic property. Benefiting from the presence of the MoSe 2 @rGO hybrid, the as-assembled aqueous Zn Te batteries deliver high discharge capacity (450 mAh g −1 at 0.15 A g −1 ) as well as outstanding cycle performance. Additionally, multiple ex-situ characterizations are used to illustrate the reversible conversion mechanism. This work may shed some light on developing aqueous Zn Te batteries with high performance.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
·
IF 8.1
Shuaiqiang Liu,Yu Li,Yan Yue,Xingxing Jiang,Chuanmin Ding,Junwen Wang,Donghong Duan,Qinbo Yuan,Xiaogang Hao,Shibin Liu
Oxygen evolution reaction (OER) is an important half-reaction of many actual processes, which has the slow kinetics of four-electron process. Interface engineering as an effective method can accelerate the slow kinetics of oxygen evolution reaction. In this paper, CoSe 2 –MoSe 2 porous nanosheet arrays with heterostructures were synthesized on carbon cloth by ion exchange and vapor phase selenization using Co-MOF as template. Due to the porous two-dimensional structure, the electron diffusion path is shortened and the self-supporting electrode has excellent conductivity. When catalyzing OER in 1 M KOH solution, the CoSe 2 –MoSe 2 delivers an overpotential of 278 mV at 10 mA cmm 2 , and Tafel slope of 61.2 mV dec −1 , making catalytic activity a better result than commercial RuO 2 . In addition, the decay of the catalytic activity is negligible after 24 h of continuous electrolysis. This work provides a method for the design of porous bimetallic selenide self-supporting oxygen evolution electrocatalysts.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Cijun Shuai,Jiachi Zhao,Qi Zhong,Shuping Peng,Jun Zan,Zhen Cao
Although photothermal therapy is widely employed for tumor treatment because of its high tumor cell selectivity and low apoptosis resistance, heat-shock proteins (HSPs) impart resistance to heat-induced apoptosis in tumor cells, thus diminishing the therapeutic effectiveness. To this end, tin selenide (SnSe) was grown in situ on reduced graphene oxide (rGO) nanosheets to construct a photothermal–thermoelectric SnSe/rGO nanosystem. The rGO component converted near-infrared light energy into localized thermal energy, resulting in the thermal ablation of tumor cells. Meanwhile, SnSe converted temperature fluctuations into pyroelectric charges, which interacted with surrounding O2 molecules to generate reactive oxygen species that oxidized the amino acids on the HSPs, which changed the protein conformation and functionally damaged the tumor cells. In addition, rGO functioned as an efficient electron acceptor to increase electron mobility, thus enhancing the thermoelectric conversion efficiency of SnSe. Then, the SnSe/rGO nanosystem was incorporated into a poly-l-lactic acid bone scaffold to prevent tumor recurrence. Results showed that the composite scaffold not only exhibited good photothermal and thermoelectric effects. In vitro cell tests demonstrated that the scaffold generated 1O2 based on temperature fluctuations and the antitumor rate reached 86.6% against osteosarcoma MG-63 cells.
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DALTON TRANSACTIONS
·
2025
·
IF 3.3
Jun Cao,Chengsheng Wang,Zechao Xu,Kelan Yan,Liming Shen,Zheng Huang,Lingjie Zhang,Runhua Fan,Ningzhong Bao
Metamaterials exhibiting simultaneous negative permittivity (ε < 0) and negative permeability (μ < 0) offer exceptional electromagnetic properties, enabling advanced applications such as subwavelength imaging, wireless power transfer, and advanced antenna systems. Chromium-based selenium spinel composites have emerged as promising candidates for random double-negative metamaterials (DNMs), although achieving tunable and desired double-negative characteristics remains challenging. Here, CoCr2Se4, distinguished by high magnetic spin resonance in high-frequency fields and low conductivity, was selected to modulate the electromagnetic properties of CuCr2Se4-based composites. A series of (1 − x)CuCr2Se4·xCoCr2Se4 samples were synthesized via a solid-state reaction. Double-negative properties were achieved in the MHz frequency ranges, specifically within 841–1000 MHz for x = 0.2, 638–1000 MHz for x = 0.4, and 484–1000 MHz for x = 0.6. The negative permittivity arises from the plasma oscillations of delocalized carriers, well described by the Drude model. Meanwhile, negative permeability is explained through the suppression of eddy currents–due to the low conductivity of CoCr2Se4-which mitigates skin-depth limitations and enhances magnetic resonance. This composite design not only reduces electromagnetic attenuation but also improves magnetic responsiveness under alternating fields. By clarifying the selection rationale for metallic ferromagnetic spinel composites, this work enhances the theoretical understanding and tuning mechanisms of negative ε and μ. It thereby broadens the scope of metamaterial research and facilitates the development of single-phase double-negative materials, especially for low-frequency near-field applications.
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Nano-Micro Letters
·
2025
·Vol. 17
·期 1
·1-20
·
IF 36.3
Liang Puwu,Pan Duo,Hu Xiang,Yang Ke R.,Liu Yangjie,Huo Zijing,Bo Zheng,Xu Lihong,Xu Junhua,Wen Zhenhai
Manganese-based chalcogenides have significant potential as anodes for sodium-ion batteries (SIBs) due to their high theoretical specific capacity, abundant natural reserves, and environmental friendliness. However, their application is hindered by poor cycling stability, resulting from severe volume changes during cycling and slow reaction kinetics due to their complex crystal structure. Here, an efficient and straightforward strategy was employed to in-situ encapsulate single-phase porous nanocubic MnS 0.5 Se 0.5 into carbon nanofibers using electrospinning and the hard template method, thus forming a necklace-like porous MnS 0.5 Se 0.5 -carbon nanofiber composite (MnS 0.5 Se 0.5 @N-CNF). The introduction of Se significantly impacts both the composition and microstructure of MnS 0.5 Se 0.5 , including lattice distortion that generates additional defects, optimization of chemical bonds, and a nano-spatially confined design. In situ/ex-situ characterization and density functional theory calculations verified that this MnS 0.5 Se 0.5 @N-CNF alleviates the volume expansion and facilitates the transfer of Na + /electron. As expected, MnS 0.5 Se 0.5 @N-CNF anode demonstrates excellent sodium storage performance, characterized by high initial Coulombic efficiency (90.8%), high-rate capability (370.5 mAh g −1 at 10 A g −1 ) and long durability (over 5000 cycles at 5 A g −1 ). The MnS 0.5 Se 0.5 @N-CNF //NVP@C full cell, assembled with MnS 0.5 Se 0.5 @N-CNF as anode and Na 3 V 2 (PO 4 ) 3 @C as cathode, exhibits a high energy density of 254 Wh kg −1 can be provided. This work presents a novel strategy to optimize the design of anode materials through structural engineering and Se substitution, while also elucidating the underlying reaction mechanisms.
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