Advanced Composites and Hybrid Materials
·
2024
·Vol. 7
·期 4
·1-12
·
IF 23.2
Lu Yukun,Zhang Yaojie,Zhang Jiale,Li Zhaoyang,Hu Feiyang,Pan Duo,Melhi Saad,Shi Xuetao,Amin Mohammed A.,El-Bahy Zeinhom M.,Shao Qian
Tin (Sn) micro-nanoparticles with special pine tree dendritic morphology were synthesized by using tin foil as the anode and titanium as the cathode through simple anodization method. Surprisingly, it is found that the morphology of Sn particles is closely related to factors such as the type of electrolyte, the concentration of the electrolyte, and the different applied voltages, and briefly discussed the influence of various factors on the growth of Sn particles. In addition, Sn particles are calcined under different temperature conditions to obtain Sn/SnO 2 hybrid materials with different tin dioxide (SnO 2 ) contents. The changes in morphology and the phase of SnO 2 crystal lattices were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively, which proved the successful synthesis of Sn/SnO 2 mixed materials. Finally, the Sn/SnO 2 hybrid material with metal-doped modified semiconductor properties was used to photocatalytic degradation of simulated organic pollutants rhodamine B (RhB). It was found that the photocatalytic degradation efficiency of the Sn/SnO 2 hybrid material under simulated sunlight conditions is near 90% in 5 h. Therefore, this work provides a convenient and effective environmental protection approach for the treatment of architecture and industrial dyes. Graphical Abstract Tin (Sn) micro-nanoparticles with special pine tree dendritic morphology are synthesized through simple anodization method, and the final product Sn/SnO 2 particles after different heat treatments show superior photocatalytic degradation of RhB under simulated solar light.
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FUEL
·
2024
·
IF 6.7
Renjie Ji,Defu Yin,Yao Chen,Like Ma,Fanglin Lv,Yuhao Zhang,Zhen Jia,Jingyun Zhang,Mingya Liu,Shitao Yu,Yue Liu
A core–shell catalyst mZSM-5@SO 4 2- /mSiO 2 composed of mZSM-5 core and SO 4 2- /mSiO 2 shell was prepared by the soft template method. Core-shell structure could promote the building of Brønsted -Lewis (B-L) acids interface and significantly improve the synergistic effect of B-L. In this paper, the Brønsted/Lewis (B/L) of mZSM-5@SO 4 2- /mSiO 2 was targeted regulating by innovatively introducing Brønsted acid (BA) sites into the shell. The optimal mZSM-5@SO 4 2- /mSiO 2 catalyst (B/L = 0.142) could achieve 72.1 % furfural yield at 140 ℃ for 1 h. In addition, 70.2 % furfural yield could be obtained after the catalyst was recycled and regenerated for 5 times. Combining In-situ IR and 13 C NMR, the reaction path was revealed in detail: xylose was first isomerized to xylulose and then dehydrated to furfural. This paper provides a research idea for the directional regulation of dual active sites of cascade reaction catalysts.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Tian Wang,Wei Wang,Yunqing Zhu,Baozhong Zhang
AuNPs/rGO composite cathode was prepared using in-situ reduction method and was applied for H 2 O 2 generation through molecular oxygen (O 2 ) undergoing a 2-electron reduction reaction in the electro-Fenton system. The results showed the AuNPs/rGO cathode exhibited good activity and stability. The size and loading amount of AuNPs, as well as applied voltages were considered for evaluating the catalytic activity of AuNPs/rGO cathode. AuNPs 2:1 /rGO with the smallest size (2.8 ± 0.6 nm) exhibited higher catalytic activity in the electro-Fenton system when the AuNPs 2:1 loading amount was 2.7 %, pH= 3, and applied voltage was −0.6 V (vs. SCE), resulting in an H 2 O 2 yield of 19.3 ± 0.1 mmol g −1 . The synergistic effect of AuNPs 2:1 and rGO enhanced the activation of H 2 O 2 , generating a large number of hydroxyl radicals (∙OH) for efficient degradation of rhodamine B (RhB), corresponding to a degradation efficiency of 100 % within 30 min. In addition, AuNPs 2:1 /rGO exhibited excellent stability and reusability in cyclic experiments. The quenching experiment and the radical spin trap test showed ∙OH and superoxide anion (∙O 2 ̄) as the active species during the reaction process. Furthermore, LC-MS and in-situ FTIR were used to analyze the intermediate products of the degradation process and determine the reaction mechanism.
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Polymer Chemistry
·
2024
·Vol. 15
·期 47
·4875-4887
·
IF 4.1
Yangyang Xu,Wenlong Tang,Hui Deng,Jianjun Zhang,Zhongquan Zhu,Changjiang Yu,Haiguang Zhu,Ke Sun,Jiazhu Li,Jacques Lalevée
Polymerization reactions induced by light are gaining increasing importance in the field of polymer synthesis; however, effective photopolymerization under visible light emitting diodes (LEDs), as opposed to UV light, remains limited and warrants further research and development. In this work, a family of bisbenzothieno[b]-fused boron dipyrromethene (BODIPY) derivatives, which have not been previously tested for photopolymerization, were designed. They contain seven fused aromatic rings with broad absorption properties and were introduced with amine and iodonium salt to form three-component photoinitiating systems (PISs) for the first time. Remarkably, under visible light irradiation, e.g. LED@405 nm and LED@660 nm, these PISs were able to initiate the free radical polymerization of acrylate monomers and cationic polymerization of epoxy monomers at room temperature, displaying different photopolymerization kinetics. This excellent initiation ability at both ends of the visible spectrum (i.e. the highest and lowest photon energy) indicated a remarkable panchromatic initiation ability. The exceptional photochemical reactivity of these BODIPY dyes and the underlying photoinitiation mechanisms of the PISs were thoroughly investigated through steady-state photolysis, fluorescence quenching experiments, and theoretical calculations. Finally, three-dimensional patterns with excellent spatial resolution were successfully printed using the BODIPY dye with the highest photoinitiation efficiency via direct laser writing, highlighting its significant potential for 3D printing applications.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Yuying Zhao,Qixin Yuan,Ruting Xu,Chenhao Zhang,Kang Sun,Ao Wang,Anqi Zhang,Ziyun Wang,Jianchun Jiang,Mengmeng Fan
Developing efficient electrocatalysts for CO 2 reduction has gained significant attention in the field of sustainable energy, especially the Cu-based catalysts for CO 2 conversion to valuable alcohols. In this study, we developed Cu nanoparticles supported on pyridinic N-B doped graphene nanoribbons/amorphous carbon (Cu/BNC-1) as an electrocatalyst for CO 2 reduction, exhibiting substantially improved ethanol (EtOH) conversion rate in terms of activity, selectivity, and stability. The Cu/BNC-1 achieved a remarkable 58.64 % Faradaic efficiency (FE) for producing EtOH at −1.0 V vs. RHE with a current density of 20.4 mA cm −2 in 0.5 M KHCO 3 electrolyte. In-situ Raman, FT-IR, and density functional theory (DFT) calculations demonstrated that the high C 2+ product selectivity of Cu/BNC-1 attributed to the pyridinic N-B modulation, lowering the CO dimerization barrier. Moreover, the synergistic confinement effect of Cu and BNC can stabilize the C-O bond of the *HOCCH intermediate, thereby increasing the yield of EtOH.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Shuofeng Li,Fangfang Wang,Chenhuan Wang,Lin Hao,Ningzhao Shang,Pengbo Zhang,Yawen Zhang,Nuo Xiao,Yaai Kang,Jin Liu,Shutao Gao,Chun Wang,Zhi Wang,Qiuhua Wu
Single-atom nanozyme (SAZ) with peroxidase-like activity has attracted great attention in point-of-care (POC) diagnostic, but the use of unstable H 2 O 2 in peroxidase catalytic reactions often leads to low detection accuracy. Thus, developing SAZ with high oxidase (OD)-like activity to construct RNA sensing systems independent of H 2 O 2 is imperative for improving accuracy. Herein, a novel strategy to fabricate boron-nitrogen co-doped zinc SAZ (ZnBNC-SAZ) with excellent OD-like activity by carbonizing Zn based zeolitic boron imidazolate frameworks is reported. The electron deficient B in imidazolate ligand can form Zn─N─B bond in situ during high temperature pyrolysis, which can regulate the electronic structure of Zn and further upshift the d-band center of Zn to improve the OD-like activity. With ZnBNC-SAZ as signal generator, a new method for sensitive RNA detection is developed by combining CRISPR/ cas13 system with terminal deoxynucleotidyl transferase-induced DNA extension reaction. The limits of detection for RNAs are as low as 20 aM. The proposed biosensor is adaptable to a lateral-flow-based readout and is universally applicable for sensing various RNAs by programming the guide RNA. Importantly, the proposed biosensor can monitor the cellular differentiation and identify patients with cervical carcinoma, showing great potential for application in facile POC diagnosis.
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JOURNAL OF APPLIED ELECTROCHEMISTRY
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2024
·
IF 2.4
Yang Xiaobo,Wang Chao,Zhou Bao,Duan Zhuoqi,Xie Zaixin,Nie Heng-Yong,Hu Yongmao
Boron and nitrogen dual-doped carbon fibers loaded with nanocrystalline NiCo were derived from carbonization of layers deposited by electrospinning a solution containing precursor reagents of nickel acetate, cobalt acetate, 4-hydroxybenzeneboronic acid, and polyacrylonitrile. This composite with uniformly distributed boron and nitrogen atoms in and NiCo nanoparticles around the carbon skeleton, denoted as NiCo@BNCF-T, where T represented the carbonization temperature in Celsius, possessed a considerable specific surface area. It was demonstrated that the NiCo@BNCF-T electrode, as an electrocatalyst, offered excellent electrocatalytic performance toward oxygen evolution reaction in alkaline environment. For example, the overpotential at 10 mA cm −2 of the NiCo@BNCF-900 electrode was 268 mV, which was 43 mV lower than that of the RuO 2 electrode. In addition, the NiCo@BNCF-900 electrode exhibited excellent durability of 90% retention after 60-h polarization at 1.60 V. The two-electrode system for electrolytic water splitting, composed of the NiCo@BNCF-900 as the anode and the commercial Pt/C as the cathode, showed a voltage of 1.49 V to afford 10 mA cm −2 for overall water splitting, which was superior to that of the RuO 2 ||Pt/C counterpart, which was a complete commercial system using noble metals. This work developed an effective electrocatalyst with non-noble metals (nickel and cobalt) and non-metal elements (boron, carbon and nitrogen), which was demonstrated to be a high-performance catalyst for oxygen evolution reaction. Graphical abstract
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FOOD CHEMISTRY
·
2024
·
IF 8.5
Yilan Zhao,Xue Jiang,Ke Huang,Xiaoli Xiong,Qing Yang
A switchable ratiometric fluorescent smartphone-assisted sensing platform based on nitrogen-doped carbon dots (N-CDs) and Rhodamine B was fabricated for the determination of the ascorbic acid (AA) content in fruits by quenching the fluorescence of N-CDs with Hg 2+ (turn-off) and recovering with AA (turn-on). The blue-emission N-CDs was synthesized by liquid dielectric barrier discharge microplasma with an average size of 3.65 nm and an absolute quantum yield of 18 % (excited at 345 nm). In addition, the fluorescence color was converted to RGB values, enabling visual and quantitative determination of AA. Under optimal parameters, the linear ranges for detecting AA were found to be 3–170 μM and 5–170 μM for fluorescence spectrometer and smartphone sensing platform. The detection limits were 0.98 μM and 2.90 μM, respectively. Furthermore, the satisfactory recoveries in fruits were obtained by RF probe and smartphone platform. This smartphone-assisted platform will facilitate sensitive and visual determination for AA.
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Journal of Water Process Engineering
·
2024
·
IF 6.3
Song He,Jianxu Gao,Xin Jin,Saiping Guo,Yajun Huang
Sulfate radical-based advanced oxidation technologies (SR-AOPs) are extensively employed in the degradation of diverse wastewater pollutants owing to their superior capacity for degrading emerging and recalcitrant pollutants and their excellent adaptability. However, how to reduce the secondary pollution caused by metal ion spillage is still a major problem. In this work, Co 2+ was introduced into the molding process of SiO 2 microspheres as a novel activator of per-oxomonosulfate (PMS), which 15 mg of the catalyst completely degraded 100 mL of 40 mg/L of Rhodamine B (RhB) in 10 min, with a low Co leaching of only 0.18 mg/L. The effects of the introduction of Co, the addition of polyvinylpyrrolidone (PVP), H 2 O, and PMS, and the adjustment of pH, temperature, and anionic inorganics on the degradation of RhB were investigated. Based on the PMS activation mechanism analysis, it was concluded that the degradation of RhB involves two pathways, including the non-radical pathway dominated by 1 O 2 and mediated electron transfer and the radical pathway dominated by SO4 − , OH, and O2 − . This study presents a novel hybrid catalyst with high efficiency and easy recyclability, good recyclability, and low secondary pollution, which provides valuable insights into the field of wastewater treatment.
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CELLULOSE
·
2024
·
IF 4.9
Liu Lei,Hu Yufan,Yang Yuhui,Cheng Hongbin,Xiao Shili
Printing and dyeing wastewater can cause serious environmental pollutant and must be treated to meet the emission standards before discharge. In this study, we report a method to prepare nano zero-valent iron (nZVI) particle-immobilized cotton (nZVI@cotton) fabrics assisted by polydopamine (PDA) deposition using cotton fabrics as the substrate. The mechanical property tests of cotton fabric revealed a significant improvement in the breaking strength after deposition of PDA. The pollutant removal capability of nZVI@cotton fabric was evaluated using rhodamine B and Cr(VI) as models. The decolorization efficiency of rhodamine B could be up to 79.45% and Cr(VI) removal efficiency was 70.74% within 60 min, respectively. In addition, the iron content, different nZVI@cotton fabric system, the effect of pollutant composition and reusability of nZVI@cotton fabric were systematically investigated. Results showed that nZVI@cotton fabric prepared with the assistance of PDA was a kind of comparable wastewater purification material with the advantages of high removal efficiency to rhodamine B and Cr(VI) ions and easy to be recycled.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2024
·
IF 4.1
Xiangqian Guo,Chenhui Qiu,Lei Wang,Jing Ding,Jinfeng Zhang,Hui Wan,Guofeng Guan
Photocatalytic CO 2 reduction with perovskite can effectively address both energy and environmental issues. Nevertheless, it remains challenging to prepare photocatalysts with suitable hollow tubular structures in rational. Herein, the La 1-x Sr x Co 1-δ Fe δ O 3 nanofiber with a hollow tubular structure was fabricated through an electrospinning method. The hollow nanofiber structure was constructed by doping Sr atoms in the A-site and Fe atoms in the B-site of LaCoO 3 perovskite. The characterization of TEM proved that the hollow tubular structural La 1-x Sr x Co 1-δ Fe δ O 3 nanofiber exhibited an external diameter of about 95 nm and an internal diameter of about 50 nm. The hollow tubular structural La 1-x Sr x Co 1-δ Fe δ O 3 nanofiber showed superior carrier separation ability which could exhibit significant advantages for photocatalytic CO 2 reduction. The CH 3 OH generation rate over the optimized La 0.8 Sr 0.2 Co 0.7 Fe 0.3 O 3 nanofiber could reach 5.25 µmol⋅g −1 ⋅h −1 . This work highlighted an electrospinning strategy to build a hollow tubular structural La 1-x Sr x Co 1-δ Fe δ O 3 nanofiber for enhancing photoreduction CO 2 .
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Fen Ma,Jiali Jiao,Yuchen Chao,Wenyuan Xie,Defeng Wu
Rod-like chitin nanocrystals (ChNCs) filled biodegradable aliphatic polyesters are of great interest because as-obtained nanocomposites are all-degradable. In this work, we prepared a poly(ε-caprolactone- b - l -lactide) (PCL- b -PLA) copolyester nanocomposite with ChNCs and carried out a crystallization study. The results disclosed that the roles of ChNCs played during crystallization of copolyester matrices were very attractive: as heterogeneous nucleator of PLA phase, whereas as inert filler for PCL phase. Thus, the overall crystallization kinetics of PLA phase were accelerated. The heterogeneous nucleation led to the formation of more amounts of crystallized PLA domains, which favored nucleating following crystallization of PCL phase. In addition, the presence of ChNCs did not strongly influence the microphase-segregated structure of PCL- b -PLA, and had good reinforcements to matrix copolymer. The selective nucleation ability of ChNCs reported in this study is valuable for regulating the structures and properties of nanocomposites based on the ChNCs-filled aliphatic diblock copolyester with double crystalline blocks.
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