Surfaces and Interfaces
·
2024
·
IF 5.7
Wenxu Zhang,Wei Li,Huixing Yang,Linlin Hou,Yongzhuo Yu,Yangyang Jiang,Chaoyu Lv,Yuxin Huang
We propose a potential solution to the problem of severe recombination of photogenerated electron-hole pairs in composite catalysts. The g-C 3 N 5 has better electronic properties and photocatalytic efficiency than g-C 3 N 4 , and In 2.77 S 4 is a typically sulfur-deficient sulfide with stable structure and strong visible light absorption. However, the In 2.77 S 4 /g-C 3 N 5 composite catalyst has severe recombination of photogenerated electron-hole pairs, which limits its performance. To solve this problem, we introduced NCDs (nitrogen-doped carbon dots) into g-C 3 N 5 to prepare hybrid material, which subsequently combined with In 2.77 S 4 . The high-efficiency S-scheme In 2.77 S 4 /NCDs-(g-C 3 N 5 ) heterojunction was prepared by electrostatic self-assembly to prevent the thermal decomposition of g-C 3 N 5 . Photocatalytic experiments show that In 2.77 S 4 /NCDs-(g-C 3 N 5 ) composite has excellent photodegradation efficiency of rhodamine B (94.23 %), high photocatalytic H 2 production (7134 μmol·g −1 h −1 ), and good reusability in the visible light. The H 2 evolution rate of In 2.77 S 4 /NCDs-(g-C 3 N 5 ) composite is about 30.10, 3.89 and 3.08 folds than In 2.77 S 4 , g-C 3 N 5 and In 2.77 S 4 /g-C 3 N 5 , respectively. The photoluminescence spectroscopy (PL) and the time-resolved fluorescence decay (TRF) indicated a substantial reduction in photogenerated carrier recombination of In 2.77 S 4 /NCDs-(g-C 3 N 5 ) compared to In 2.77 S 4 /g-C 3 N 5 . Taking advantage of the high conductivity of NCDs , the electron-highways were constructed in heterojunctions, which accelerates the interfacial depletion of useless electron-hole pairs and reserved more strong redox carriers. In addition, we inferred a possible energy band structure for In 2.77 S 4 /NCDs-(g-C 3 N 5 ) heterojunction based on the energy band bending theory. This work provides an expandable idea for improving the utilization efficiency of photogenerated carriers by constructing electron-highways in heterojunctions.
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INSECT MOLECULAR BIOLOGY
·
2024
·
IF 2.3
Hui-Hua Cao,Wei-Wei Kong,Xi-Ya Chen,Sadaf Ayaz,Cai-Ping Hou,Yi-Sheng Wang,Shi-Huo Liu,Jia-ping Xu
The RNA interference pathway mediated by microRNAs (miRNAs) is one of the methods to defend against viruses in insects. Recent studies showed that miRNAs participate in viral infection by binding to target genes to regulate their expression. Here, we found that the Bombyx mori miRNA, miR-6498-5p was down-regulated, whereas its predicted target gene pyridoxal phosphate phosphatase PHOSPHO2 ( BmPLPP2 ) was up-regulated upon Bombyx mori nucleopolyhedrovirus (BmNPV) infection. Both in vivo and in vitro experiments showed that miR-6498-5p targets BmPLPP2 and suppresses its expression. Furthermore, we found miR-6498-5p inhibits BmNPV genomic DNA (gDNA) replication, whereas BmPLPP2 promotes BmNPV gDNA replication. As a pyridoxal phosphate (PLP) phosphatase (PLPP), the overexpression of BmPLPP2 results in a reduction of PLP content, whereas the knockdown of BmPLPP2 leads to an increase in PLP content. In addition, exogenous PLP suppresses the replication of BmNPV gDNA; in contrast, the PLP inhibitor 4-deoxypyridoxine facilitates BmNPV gDNA replication. Taken together, we concluded that miR-6498-5p has a potential anti-BmNPV role by down-regulating BmPLPP2 to modulate PLP content, but BmNPV induces miR-6498-5p down-regulation to promote its proliferation. Our findings provide valuable insights into the role of host miRNA in B. mori –BmNPV interaction. Furthermore, the identification of the antiviral molecule PLP offers a novel perspective on strategies for preventing and managing viral infection in sericulture.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Miao Li,Yu Zhang,Zihao Chen,Yewei Zhang,Bin Yang,Fang Xie,Xiaobo Gong,Tao Zhang,Xiaoxiao Huang
Development of magnetic composites with rational microstructural design to achieve excellent electromagnetic wave (EMW) absorption in the low-frequency range is necessary and still challenging. Herein, the B/N carbon nanotubes loaded with Ni nanoparticles were successfully synthesized through a homogeneous precursor pyrolysis route. The homogeneity of the micro-magnetic field in the composite architecture is improved by the co-doping of B and N in carbon nanotubes due to the polarization effect, which would enhance the impedance matching and EMW absorption. The Ni@B/N carbon nanotubes exhibit a minimum reflection loss (RL min ) of −56.9 dB at 8.24 GHz with a maximum bandwidth of 7.12 GHz ranging almost all S and C bands (from 3.44 to 10.56 GHz) suggesting that the composite architecture effectively enhances low-frequency EMW absorption properties. The combination of impedance matching and interfacial polarization resulting from the homogeneous Ni nanoparticles and co-doping of B and N in carbon lattice structure is responsible for the enhanced low-frequency EMW absorption properties. This simple co-doping synthesis strategy provides a new design strategy for the preparation of broadband and low-frequency EMW absorbers.
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CHEMICAL PHYSICS
·
2024
·
IF 2
Ronghua Zhang,Shikun He,Fei Wang,Bo Cai,Junfeng Feng,Hui Pan
Porous bi-functional catalsyts consisting of metals and zeolites are used as solid acid catalysts, characterized by octahedral morphology and good stability. In this work, a series of bifunctional catalysts (xZr-HY) with Lewis and Brønsted acid sites were prepared by a simple impregnation method, and used for the conversion of glucose to levulinic acid and methyl levulinate. The catalysts were characterized using different methods of physical and chemical properties. The analysis results showed that these catalysts existed in tetrahedral form with good pore structure , suitable acid strength and acidity. Using 10Zr-HY as the catalyst, 43.0 % yield of LA and ML could be obtained at 200 ℃ for 2.5 h. In addition, this catalytic system also gave high LA and ML yields from other biomass carbohydrates. Meanwhile, the 10Zr-HY catalyst had good stability and reusability after four cycles. This catalyst has the potential to convert biomass into high value-added platform compounds.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 30
·1-12
·
IF 2.8
Ding Feng,Li Jiaying,Wang Jiacheng,Wu Tengyan,Liu Xin,Yang Zeliang
Nano magnetic particles immobilized on the surface of carbon spheres ( M Fe 2 O 4 /CNS, M = Mn, Ni, Zn) composites have been obtained through a facile and environmental friendly solvothermal method. The measurement results of M Fe 2 O 4 /CNS clarified the successful preparation of M Fe 2 O 4 /CNS and characterization of composites. Meanwhile, the activation performance of M Fe 2 O 4 /CNS was also measured through catalyzing persulfate (PS) for degrading Rhodamine B. Results showed that the catalytic performance of M Fe 2 O 4 /CNS for PS activation was much stronger than that of pure CNS, and the catalytic ability of M Fe 2 O 4 /CNS was MnFe 2 O 4 /CNS > NiFe 2 O 4 /CNS > ZnFe 2 O 4 /CNS. The influence factors of Rhodamine B degradation were also investigated. When the optimum conditions were conducted, with PS 5 × 10 –3 M, MnFe 2 O 4 /CNS 0.5 g/L, initial pH 6.0, and 60 °C, 98.4% Rhodamine B degradation was obtained within 70 min. Finally, the recycle of MnFe 2 O 4 /CNS was carried out for four times, which demonstrated the favorable retrievability and reusability of MnFe 2 O 4 /CNS. The experiments also proved that the synthesized MnFe 2 O 4 /CNS was a potentially useful catalyst for contaminants degradation in water/wastewater treatment.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Mei Yang,Jiao Ma,Ling Xia,Yujiao Guo,Xiaofang Liu,Wei Bai,Mingwu Xiang,Junming Guo
The spinel LiMn 2 O 4 cathode material shows severe capacity degradation due to Jahn–Teller distortion and dissolution of Mn during the charge-discharge process. Herein, a series of single crystal truncated octahedral of LiFe 0.03 B x Mn 1.97−x O 4 (0≤x≤0.10) were synthesized by simple solid-state combustion combined with Fe-B co-doping, morphology and particle size controlling strategy. Through Fe-B co-doping, not only the LiFe 0.03 Mn 1.97 O 4 containing {111}, {100} and {110} planes are successfully controlled to the particles containing only {111} and {100} planes, but also the near-nanometer particles are controlled to bigger submicron sizes. It is found that Fe-B co-doping can enhance the stability of the crystal structure, inhibit Jahn-Teller distortion and reduce the dissolution of Mn. Among them, the optimized LiFe 0.03 B 0.08 Mn 1.89 O 4 forms a truncated octahedral single crystal particle with good crystallization and only {111} and {100} crystal faces, and the particle size is around 349.3 nm, showing exceptional high rate capacity and long cycle life. The LiFe 0.03 B 0.08 Mn 1.89 O 4 releases a high initial discharge capacity of 107.1 mAh/g with a capacity retention of 77.7% after 1000 cycles at 10 C, which is higher than that of the LiFe 0.03 Mn 1.97 O 4 (58.8%). Even at 20 C, LiFe 0.03 B 0.08 Mn 1.89 O 4 still achieves a high reversible specific capacity (90.4 mAh/g) and outstanding long-cycle stability (81.3%, 1000th). This work provides a scientific basis for the crystal surface control and particle size control of spinel LiMn 2 O 4 , which is of great significance for the development of the next generation of high-power lithium-ion batteries.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Qiang Xiao,Xianliang Song,Xiaojuan Jin
The advancement of rechargeable zinc-air batteries (ZABs) faces significant challenges, particularly due to substantial polarization and the slow kinetics of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Multi-element doping represents an effective strategy to address the deficiencies in catalytic activity and stability observed in single-atom catalysts. In this study, we prepare an activated lignin carbon catalyst doped with three elements (N, S, and B) via salt assisted (KOH), referred to as AL-NSB, with the aim is to achieve bifunctional catalysis through the synergistic interaction between the three elements to influence the distribution of the electron cloud and the extent of carbonaceous defects within the catalyst. The catalyst exhibits an ORR half-wave potential ( E 1 / 2 ) of 0.798 V relative to the reversible hydrogen electrode. The superior activity of AL-NSB results in a peak power density of 293.76 mW cm − 2 for the ZAB, along with an excellent cycle lifetime exceeding 1000 h, surpassing the performance of commercial Pt/C-RuO 2 catalysts. The findings of this study underscore the critical roles of N, S, and B in enhancing the activity and stability of both the oxygen reduction and evolution reactions.
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Journal of Coatings Technology and Research
·
2025
·
IF 2.8
Ran Ke,Kang Fenghua,Zhou Wentao,Zhang Ziyuan,Li Yintao,He Zhiyu
The widely used indicator, 2-(5-bromo-2-pyridylazo)− 5-diethylaminophenol (Br-PADAP), can enable color tracing of radioactive contaminants when incorporated into strippable decontamination materials. However, its practical application is hindered by poor dispersion in aqueous substrates. To address this issue, this study prepared an amphiphilic diblock copolymer, PEA-b-PAA, using a one-pot synthesis method. Ethyl acrylate (EA) and acrylic acid (AA) were used as monomers, with S,S,S-trisulfanyl dibenzyl carbonate (DBTTC) serving as the initiator for reversible addition-fragmentation chain transfer (RAFT) polymerization. Test results demonstrated that block copolymers with EA:AA monomer ratios of 2:1, 1.5:1, and 1:1 effectively dispersed and stabilized the Br-PADAP indicator. Among these, the copolymer with a 1.5:1 monomer ratio, added at a concentration of 4%, improved the mechanical properties of the peelable decontamination material without compromising the color tracing function of Br-PADAP. This enhancement facilitates practical applications by enabling incorporation into aqueous peelable substrates, while maintaining the indicator’s color development mechanism. The resulting materials exhibit both effective decontamination and reliable color tracing capabilities.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Linqian Hou,Qiulan Li,Jitao Li,Dezhi Yang,Yaling Yang
A curcumin based iron, copper and boron doping carbon dots (Cu,Fe,B/Cur-CDs) with ascorbic acid oxidase (AAO)- and peroxidase (POD)-like activities were synthesized via microwave digestion. The Cu,Fe,B/Cur-CDs oxidize ascorbic acid (AA) to dehydroascorbic acid (DHAA), which reacts with o -phenylenediamine (OPD) to generate fluorescent 3-(1,2-dihydroxyethyl) furo [3,4-b]quinoxaline-1-one (DFQ). Simultaneously, it catalyzes OPD/H₂O₂ to fluorescent 2,3-diaminophenazine (DAP) via POD-like activity. In the presence of metronidazole (MNZ), it induces competitive inhibition by competing with OPD for the active sites of Cu, Fe, B/Cur-CDs. This reduces the generation of •OH and •O₂ − radicals, hindering the oxidation of OPD to form DAP and thus decreasing the system's fluorescence intensity. Additionally, MNZ quenches the fluorescence of DFQ at 420 nm via the inner filter effect. Therefore, a dual-signal fluorescence sensor for MNZ detection was constructed. The sensor achieved 91.6–109.9 % and 86.2–116.2 % recovery in food samples using standard addition, demonstrating high sensitivity for dual-signal detection systems.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yanling Wang,Yanqi Xu,Haiqing Qin,Cunjun Li,Luwen Tang,Luyang Gan,Hai Wang,Xinyu Wang,Linjiang Wang
Addressing the environmental impact of heavy metal ions and organic dye pollution from industrial processes is a critical challenge for sustainable development. Herein, an innovative approach is reported to sustainable purification of industrial wastewater through the synthesis of magnetic γ-Fe 2 O 3 @NiFe-layered double hydroxides (γ-Fe 2 O 3 @NiFe-LDHs) from wastewater containing various heavy metal ions, which are recovered by a magnetic field and then applied to Rhodamine B (RhB) wastewater treatment. The synthesized γ-Fe 2 O 3 @NiFe-LDHs were proved to possess LDHs characteristics, as confirmed through a comprehensive suite of techniques including X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), vibrating sample magnetometry (VSM), X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy (XAS), and electron paramagnetic resonance (EPR) analysis. Remarkably, these γ-Fe 2 O 3 @NiFe-LDHs demonstrate exceptional efficacy in removing high concentrations of heavy metal ions (including Fe, Ni, Cr, Cu, Ca, Al, and Mg), as well as Mn, achieving removal efficiencies of 99.99 % and 97.89 %, respectively, through highly super-stable mineralization process. Meanwhile, the integration of multiple transition metals (Ni, Fe, Cr, Cu, and Mn) within the NiFe-LDHs laminates enables critical electronic cycling for RhB degradation via Fe-based Fenton-like reactions, achieving both cost-effective and highly efficient catalytic performance. Specifically, these γ-Fe 2 O 3 @NiFe-LDHs facilitated the degradation of RhB (100 mL, 50 mg/L) to an impressive 96.44 % without any light irradiation, and notably retained catalytic activity across several reused cycles. This environmentally friendly approach promotes sustainable treatment among different industrial wastewaters and offers great potential for the development of multilevel resource utilization and green environmental management.
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Surfaces and Interfaces
·
2024
·
IF 5.7
Xiaoqian Chen,Xingliang Chen,Binglin Li,Jixian Ma,Binxia Zhao,Nan Shao,Yuqi Wang
A magnetic ternary double Z-scheme ATP-g-C 3 N 4 /SnFe 2 O 4 /Bi 2 WO 6 (AG/SFO/BWO) heterojunction was prepared by a simple and green hydrothermal process, which was successfully used in the dye degradation . AG/7.5 %SFO/BWO catalyst demonstrated outstanding visible-light-induced degradation, achieving an impressive 96.72 % degradation of rhodamine B (RhB) in 2 h. Compared with Bi 2 WO 6 (BWO) and SnFe 2 O 4 /Bi 2 WO 6 (SFO/BWO), the degradation efficacy was increased about 1.65 and 1.16 times, respectively. After being used for five batches, the degradation rate of RhB remained over 90 %. Moreover, AG/7.5 %SFO/BWO showcased remarkable efficacy in degrading methylene blue (MB), Congo red (CR), and tetracycline (TC). Bacterial toxicity test indicated the toxicity of dyes was rapidly decreased in 24 h. Physicochemical properties and morphological characteristics of the prepared photocatalysts were investigated by various methods, including XRD , FTIR, XPS , SEM, TEM , BET, VSM , UV–vis, and EIS . AG/7.5 %SFO/BWO, utilizing a dual-Z scheme pathway, efficiently absorbed broad light, yielding multiple active agents, primarily hole (h + ) and superoxide radical •O 2 − . The double Z-scheme heterojunction structure enhanced the electron-hole separation and ensured a stable photochemical environment. UPLC-HRMS was used to identify intermediates during the RhB degradation. Its degradation pathway and catalytic mechanism were illustrated systematically. The bio-toxicity (acute toxicity, developmental toxicity, and mutagenicity) of the intermediates was also evaluated by T.E.S.T.
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MOLECULES
·
2025
·Vol. 30
·期 21
·4215
·
IF 4.6
Yukun Tang,Pingping Yang,Jinpu Xie,Tengfei Duan,Zengmin Tang,Yao Liu,Rui Zhang,Haihu Tan,Jingjing Du,Lijian Xu
In recent years, cadmium sulfide (CdS) has been widely investigated due to its excellent photocatalytic performance. However, its practical application in pollutant treatment is limited by its narrow photoresponse range and susceptibility to photocorrosion. Herein, we design a unique four-layer core–shell structure NaYF 4 :Yb 3+ ,Er 3+ @NaYF 4 @CdS@Au (CSNPs@CdS@Au), with an inert NaYF 4 shell coating on NaYF 4 :Yb 3+ ,Er 3+ (CNPs) to form NaYF 4 :Yb 3+ ,Er 3+ @NaYF 4 (CSNPs) and CdS depositing on CSNPs (CSNPs@CdS); Au nanoparticles are loaded on CdS (CSNPs@CdS@Au). Compared with CdS (9.81%), CSNPs (5.0%), CSNPs/CdS (6.9%), and CSNPs@CdS (81.0%), CSNPs@CdS@Au degrades 97.7% Rhodamine B (RhB) within 15 min, exhibiting superior photocatalytic performance, attributable to two key factors: (1) the NaYF 4 inert shell encapsulation amplifies upconversion (UC) luminescence intensity by suppressing surface quenching; and (2) the electron transfer between Au nanoparticles and CdS effectively promotes spatial separation of photogenerated charge carriers and increases reactive active sites. Additionally, after five degradation cycles, CSNPs@CdS@Au still maintains a 93.25% degradation rate for RhB, confirming its excellent stability. This remarkable stability is attributed to the uniquely designed multilayer core–shell architecture, which significantly enhances structural integrity through physical isolation effects. This study establishes a material preparation strategy for efficient photocatalytic pollutant degradation.
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