LANGMUIR
·
2024
·
IF 3.7
Xianmin Gong,Yi He,Liping Yan,Huilian Zhou,Yiling He,Kaijun Wei,Quangang Chen,Shijun Xu
In this study, vanadium carbide (VC) was used as the raw material to synthesize PDA-functionalized VC (P-VC). VC and P-VC were added as nanoreinforced materials to the Ni–W–B coating. The effects of the two nanomaterials on the morphology, wear resistance, and corrosion resistance of the Ni–W–B coatings were investigated and compared. The experimental results show that the surface of the Ni–W–B/P-VC coating is denser and more uniform than that of the Ni–W–B and Ni–W–B/VC coatings, and there are no obvious defects on the surface. According to the hardness test, the Ni–W–B/P-VC coating reaches the highest microhardness of 887.1 HV. According to the friction and wear tests, the Ni–W–B/P-VC coating has the shallowest scratches, the lowest average friction coefficient (COF = 0.274), and the lowest wear rate (9.578 × 10–8 mm2/N). The corrosion resistance is the best, the corrosion rate is 0.0456 mm/y, and the impedance value Rt reaches 14,501 Ω·cm2.
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2024
·
IF 4.1
Shan Huang,Mengmeng Wang,Jiajia Liu,Xinqi Liu,Min Xue,Yi Fang,Qi Xiao
Black phosphorus (BP) is highly regarded in photocatalysis for its bandgap thickness dependency, high hole mobility, and broad visible light absorption. This study introduces a simple hydrothermal method to construct a BP QDs/BiVO 4 direct Z-scheme heterojunction. The composite’s crystal structure, morphology, and photochemical properties were comprehensively characterized. The photocatalytic activity was evaluated using Rhodamine B (RhB) degradation under visible light. Notably, BP QDs 0.12% /BiVO 4 exhibited exceptional performance, achieving a 95.4 % RhB degradation after 100 min, three times higher than BiVO 4 alone. The direct Z-scheme heterojunction played a pivotal role in facilitating O 2 − and h + involvement in the degradation process. The interfacial interaction between BP QDs and BiVO 4 significantly enhanced BiVO 4 ′s visible light absorption, preserving its strong oxidation–reduction capacity. This enhancement was further corroborated by DFT simulation calculations. Overall, this study presents a novel approach for constructing efficient Z-scheme photocatalysts based on BP QDs, laying a solid foundation for their application in the field of photocatalytic degradation.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2024
·
IF 4.2
Dechong Ma,Jiawei Tang,Guowen He,Yun Xue,Sai Pan,Fengjiao Liu,Jingzhe Zhao
This study utilized X-diffraction, BET, photoluminescence , UV–vis DRS, FTIR , SEM, XPS , TOC analysis, EPR , electrochemical measurements, and LC-MS to characterize the structural characteristics, morphology, optical properties , photocatalytic activity , surface electronic states, active compounds, and potential photodegradation pathways of rhodamine B (RhB) over as-prepared Bi 2 O 3. The as-prepared Bi 2 O 3 photocatalyst exhibited a narrow bandgap, which enabled efficient absorption of visible light, thereby contributing to its enhanced photocatalytic activity. Additionally, Bi 2 O 3 exhibited a high degradation efficiency for RhB. with up to 96.8 % of RhB removed within 120 min at pH 3.0. The excellent photocatalytic performance of Bi 2 O 3 can be attributed to the formation of the heterogeneous Bi 2 O 3 /BiOCl structure on the Bi 2 O 3 surface in the presence of HCl. Moreover, the TOC analysis revealed that over 58.1 % of the carbon in the RhB solution was mineralized into CO 2 after 120 min of irradiation. The effect of catalyst content, RhB concentration, initial pH, and inorganic anions on the photocatalytic degradation of RhB over Bi 2 O 3 was examined. Furthermore, the active compounds and potential photocatalytic mechanism of the Bi 2 O 3 /BiOCl heterogeneous structure toward RhB were evaluated. The intermediates formed during RhB degradation were identified, and the corresponding degradation pathway was deduced via LC-MS.
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JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 44
·20575-20592
·
IF 3.5
Yang Yutong,Qi Wenkang,Xie Yuanyuan,Huang Chunjie,Su Qiaoqiao,Xue Xingyong,Han Yaocong,Wei Dongping
As efficient activators of peroxymonosulfate (PMS), cobalt ions play an important role in the degradation of organic pollutants. It is imperative to synthesize PMS activators from low-cost materials with uniform structures to improve the catalytic efficiency and cycle life and reduce the cost of wastewater treatment, which has practical importance. In this work, alkali-activated slag geopolymer microsphere-supported Co catalysts (Co-GMs) were synthesized via a simple solution impregnation method and used for the degradation of Rhodamine B (RhB). The Co-GM/PMS system is highly efficient, and the degradation rate of RhB (40 mg/L) reached 99.8% within only 10 min. Moreover, Co-GM has a wide pH range from 3 to 9 and good anti-interference performance for other ions, as well as low Co 2+ leaching (0.809 mg/L) and favorable reusability. Reactive oxygen species (ROS) were explored via radical quenching experiments and electron spin-resonance (ESR) spectroscopy, which revealed determined that the major ROS involved in the degradation of RhB are 1 O 2 and SO 4 ·− . The synergistic effect of free and nonfree radicals plays an important role during degradation. Moreover, four probable degradation pathways were proposed via liquid‒phase mass spectrometry (LC‒MS). The results revealed that the removal rate of total organic carbon (TOC) reached 74.2% within 60 min. This research innovatively proposed the application of geopolymer composite catalysts in advanced oxidation and developed an ultralow-cost PMS activator for highly efficient degradation of RhB, which represents a new choice for wastewater treatment. Graphical abstract
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Qingfeng Dong,Ruojian Gao,Xiaofang Liu,Li Li
In this study, photobactericidal films exhibiting excellent antibacterial activity upon irradiation under green light (530–545 nm) were prepared by incorporating erythrosine B (EB) into ethyl cellulose (EC) film. The results of Fourier-transform infrared spectra illustrated that the EB was successfully encapsulated in the films. Additionally, the EC/EB films exhibited a semi-transparent magenta hue with some UV blocking properties. As the amount of EB added to the EC films increased the tensile strength decreased from 22.79 MPa to 9.09 MPa, and the elongation at break increased from 8.20 % to 30.80 %. Under green light irradiation, the EC/EB films showed strong antibacterial activity (> 99 % bacteriostasis rate for Staphylococcus aureus and Escherichia coli ). Research on antibacterial mechanisms implied that the reactive oxygen species generated via photochemical pathways, caused damage to the bacterial cell membrane, leading to the leakage of substances within the bacterial cells and ultimately resulting in the death of the bacteria. Finally, the EC/EB films were applied to the preservation of salmon fillets, and the results showed the EC/EB films could significantly inhibit the growth of spoilage bacteria, thereby extending the shelf life by 2–3 days. Therefore, the prepared photobactericidal films have more potential for application in aquatic products preservation.
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高影响因子
DESALINATION
·
2024
·
IF 8.3
Tao Liu,Longlong Wang,Wenliang Wang,Jianhua Yang,Yunxia Hu
The nanofiltration (NF) membranes having excellent chlorine resistance and sufficient perm-selectivity are highly desired in drinking water treatment and other applications. Herein, a novel block copolymer NF membrane with superior chlorine resistance, especially high water permeance was prepared via phase inversion , using a tailor-made polysulfone- block -hyperbranched polyglycerol (PSf- b -hPG) material. The fabricated PSf- b -hPG NF membrane shows an extremely thin separation layer with a thickness of around 80 nm and a high overall porosity of 65 %, thanks to the structural advantage of hyperbranched hydrophilic hPG segments and the unique feature of the PSf- b -hPG casting solution of possessing a very low viscosity at a high solid content. The membrane exhibits an effective pore diameter of 1.6 nm, and the molecular weight cut-off (MWCO) was around 4 kDa. The membrane displayed extremely high pure water permeance of 34 LMH/bar as well as a satisfactory Na 2 SO 4 rejection of 74 %. Moreover, the membrane exhibits superior chlorine resistance with no change in separation performance when challenged with 36,000 ppm ∙ h chlorination intensity and also maintains a stable Na 2 SO 4 rejection and water permeance during the 14 h NF test. Our results suggest the NF membrane prepared by PSf- b -hPG has superior chlorine resistance and high water permeance, and is capable of efficiently removing sulfate from drinking water or others.
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PLANT PHYSIOLOGY AND BIOCHEMISTRY
·
2025
·
IF 5.7
Jiafei Qian,Chuanhong Ren,Fan Wang,Yunlin Cao,Yan Guo,Xiaoyong Zhao,Yilong Liu,Changqing Zhu,Xiaoying Li,Hongxia Xu,Junwei Chen,Kunsong Chen,Xian Li
Flavonol glycosides are secondary metabolites important for plant development and stress defense such as UV-B irradiation. UDP-glycosyltransferase (UGT) is the last enzyme step that catalyzes flavonol glycosides biosynthesis. Eriobotrya japonica is abundant in flavonol glycosides, but UGTs responsible for accumulation of flavonol glycosides remain unknown. Here, 13 flavonol glycosides including monoglycosides and diglycosides were characterized in different tissues of loquat by LC-MS/MS. UV-B irradiation significantly increased the accumulation of four quercetin glycosides and two kaempferol glycosides in loquat fruit. Based on UGT gene family analysis, transcriptome analysis, enzyme assays of recombinant proteins as well as transient overexpression assays in Nicotiana benthamiana , three UGTs were identified, i.e. EjUGT78T4 as flavonol 3- O -galactosyltransferase, EjUGT78S3 as flavonol 3- O -glucosyltransferase, and EjUGT91AK7 as flavonol 1→6 rhamnosyltransferase. This work elucidates the formation of flavonol glycosides in loquat through UGT-mediated glycosylation.
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Food Frontiers
·
2024
·
IF 7.4
Ying Yang,Mengfan Luo,Wanyi Zhou,Wenyang Tao,Jingrui Li,Jianrong Xing,Quanqin Tan,Yuxing Guo
In recent years, the development of immunosuppression has become common, and probiotics are a vital immunomodulatory strategy. This study evaluated the alleviating effect of Lactiplantibacillus plantarum ( L. plantarum ) YY-112 on cyclophosphamide-induced immune imbalance and resolved the possible mechanism of action. L. plantarum YY-112 at 10 9 CFU/mL lowered loss of body weight and alleviated splenic injury, intestinal injury, and inflammation, according to the hematoxylin and eosin staining. Biochemical results showed that 10 9 CFU/mL L. plantarum YY-112 increased interleukin-10 and immunoglobulin M levels and decreased interferon-γ levels. Additionally, the immunoregulatory effect at the molecular levels of L. plantarum YY-112 was analyzed by transcriptome sequencing. L. plantarum YY-112 significantly upregulated Cr2 and downregulated C5aR1 to regulate the complement system; downregulated S100a8 , S100a9 , and Mmp9 to inhibit neutrophil aggregation; upregulated Cd19 , Cd72 , Cd3e , Cd28 , Cd80 , Cd8a , and histocompatibility-2-related genes to regulate B- and T-cell activation; and upregulated Xiap , Malt1 , Ikbkb , Mapk11 , Mef2c , Mapk12 , Ras , and Myc to activate immune signaling pathways. Furthermore, L. plantarum YY-112 improved intestinal microbial structure and reduced enrichment of Lachnospiraceae_NK4A136_group , norank_f_Lachnospiraceae , Desulfovibrio , Colidextribacter , and Helicobacter . In conclusion, these findings offer valuable insights into the potential mechanisms through which L. plantarum YY-112 regulates immune imbalance.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 3
·e70023
·
IF 0
Xinpeng Chen,Jiabao Wu,Runshan Chu,Lili Xing,Yurong Sun,Jiapeng Wang,Guoqiang Chen,Tieling Xing
There are tremendous potential in utilizing metal–organic frameworks (MOFs) for enhancing the removal of organic dyes from wastewater. However, the recovery of powdered catalysts poses a significant challenge. In this study, four different iron-based metal–organic frameworks (Fe-MOFs) were synthesized by growing them in situ on carboxylated cotton fabrics. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) were employed to conduct a comprehensive characterization of the Fe-MOFs. The dye removal rate of Fe-MOF@Cotton was meticulously determined by comprehensively investigating various factors including the concentration of the dye and hydrogen peroxide (H 2 O 2 ), the pH value of the solution, and the temperature. Extensive catalytic degradation experiments were conducted to assess the performance of Fe-MOF@Cotton. The results vividly demonstrated that Rhodamine B (RhB) was photocatalytically degraded by Fe-MOF@Cotton with remarkable efficiency in the presence of H 2 O 2 . Notably, the four MOF fabric composites were capable of degrading over 97% of RhB with a concentration of 20 mg/L. Moreover, these composites exhibited excellent reusability, strongly indicating their significant potential for application in the dye wastewater treatment industry. This not only highlights the effectiveness of Fe-MOF@Cotton in dye removal but also offers a promising avenue for addressing the challenges associated with dye-contaminated wastewater treatment.
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Advanced Electronic Materials
·
2024
·
IF 5.3
Wei Wang,Yujun Deng,Shuai Sun,Massimiliano Galluzzi,Yang Jiao,Paul K. Chu,Zeren Li,Jia Li,Jianquan Yao
Visible-blind ultraviolet (VBUV) photodetectors are designed for UV detection without responding to visible light, thus having many applications in communications, flame detection, environment monitoring, and astronomy. Herein, an organic device concept based on the bulk heterojunction (BHJ) photodiode is presented for high-performance VBUV photodetection and imaging. The BHJ, comprised of an organic electron donor, 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C8-BTBT), and an electron acceptor, indene-C 60 bisadduct (ICBA), shows efficient generation and transport of free charges upon UV irradiation. The organic photodiode (OPD) delivers exceptional VBUV photodetection performance. At a low voltage of −0.5 V, the device exhibits a wide linear dynamic range of 98.15 dB. Furthermore, the OPD can detect ultra-low light intensities down to 0.58 µW cm −2 with a high photoresponsivity of 0.12 A W −1 and specific detectivity of 2.75 × 10 12 Jones. More importantly, by integrating the OPD with a readout integrated circuit, the pixel-array organic VBUV imager is demonstrated to have high-quality imaging capability. The results reveal a novel strategy to design VBUV photodetectors and imagers with balanced performance, cost, area, flexibility, and power consumption.
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Science China-Chemistry
·
2017
·Vol. 61
·期 3
·276-280
·
IF 4.132
Qi Guangyu,Wang Kai,Xiao Guanjun,Zou Bo
Pressure, as a thermodynamic parameter, provides an appropriate method to detect weak intermolecular interactions. The C–H···H–B dihydrogen bond is so weak that the experimental evidence of this interaction is still limited. A combination of in situ high pressure Raman spectra and angle-dispersive X-ray diffraction (ADXRD) experiments was utilized to explore the dihydrogen bonds in dimethylamine borane (DMAB). Both Raman and ADXRD measurements suggested that the crystal structure of DMAB is stable in the pressure region from 1 atm (1 atm=1.01325×10 5 Pa) to 0.54 GPa. The red shift of CH stretching and CH 3 distortion modes gave strong evidence for the existence of C–H···H–B dihydrogen bonds. Further analysis of Raman spectra and Hirshfeld surface confirmed our proposal. This work provided a deeper understanding of dihydrogen bonds. And we wish that high pressure could be applied to identify other unconfirmed hydrogen or dihydrogen bond.
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International Journal of Applied Ceramic Technology
·
2018
·Vol. 15
·期 5
·1146-1156
·
IF 1.165
Qingliang Shan,Jianbao Hu,Yanmei Kan,Dewei Ni,Le Gao,Xiaowu Chen,Shaoming Dong
Si-B-C ceramics were prepared through reaction sintering, and the influence of Al 2 O 3 addition on the high-temperature (1100-1300°C) oxidation behavior of the material under air atmosphere was studied. The erosion behavior and mechanism are determined from the measurement of weigh changes, microstructure observations, and characterization of the generated oxides on postexposure specimens. Results show that Al 2 O 3 is enriched in the oxidized layer, inhibiting the volatilization of B 2 O 3 and impeding the crystallization ability of oxide (cristobalite). Narrower erosion layer and less weigh change are observed with Al 2 O 3 . Low-frequency Raman results reveals that with the increase in Al 2 O 3 , the bending vibrations of the BO 4 units and B-O-B stretching of the metaborate ring relative intensity are enhanced. Furthermore, high-frequency Raman results shows that the relative proportion of high-dimensional vibration modes Q 3 and Q 4 which result in a higher viscosity of melt and a greater resistance of oxygen diffusion are positively correlated with Al 2 O 3 .
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