INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2017
·
IF 3.671
Ling Yi,Yisi Wang,Guanliang Lin,Danling Lin,Wenliang Chen,Yugang Huang,Guodong Ye
Ring-opening polymerization of S -propargyl-cysteine -N -carboxyanhydride has been used to synthesize conformation switchable poly( S -propargyl-cysteine) starting with l -cysteine, d l - and d -cysteine. Then cationic polypeptides with different backbone chirality are obtained by nearly 100% side-chain grafting of cysteamine via thiol-yne click chemistry. The cationic polypeptides containing mixed conformations of β-sheets, β-turns and random coils are stable against pH, salt and temperature variations. The cationic polypeptides can condense siRNA at a low polypeptide/siRNA weight ratio to form nanoparticles with size depending on the backbone chirality. The cationic polypeptides derived from poly( S -propargyl- l or d -cysteine) are non-cytotoxic to HeLa and HepG2 cells, but interrupting the backbone chirality enhances the cytotoxicity sharply. The cationic polypeptides used for siRNA delivery show good transfection efficiency, but cell internalization process depends on the backbone chirality. The cationic polypeptide derived from the poly( S -propargyl- l -cysteine) is an appropriate siRNA vector with advantages of non-cytotoxicity and high transfection efficiency.
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高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2024
·
IF 4.1
Jiaping Yang,Junpeng Deng,Yansheng Liu,Zhenle Qin,Jin Zhou,Xiaobo Jia,Guofu Wang,Yuqiang Weng,Feng Ling,Bin Zhou
Developing an efficient and sensitive method for detecting the coronavirus disease (COVID-19) is crucial. In this study, a phase-dependent SPR biosensor has been developed to detect the SARS-CoV-2 S protein with high sensitivity. The phase shifts of the SPR spectral interferogram are extracted using the windowed Fourier transform (WFT) method. The summation of the phase shifts of the prominent frequency, which make up the SPR spectral interferogram, is used as a numerical index to reflect the “negative” or “positive” results. The SARS-CoV-2 S protein antibody is modified onto an Au film, which serves as a sensing surface when detecting the SARS-CoV-2 S protein. The SARS-CoV-2 S protein antibody functionalized Au nanoparticles are used to form a (anti-S@AuNPs)-(SARS-CoV-2 S protein)-(Au film) sandwich structure, which reduces the SPR detection limitation to 1 ag/mL. An external laser is then used to induce the localized surface plasmon resonance (LSPR) between the AuNPs and the Au film in the sandwich structure, enhancing the detecting sensitivity by 357 %. This study provides a label-free method for detecting the SARS-CoV-2 S protein with low concentrations, indicating its potential in detecting the SARS-CoV-2 virus and viral disease diagnosis.
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POLYMER
·
2024
·
IF 4.1
Zecheng Cao,Xiaojiao Kang,Wei Lü,Hongcheng Wang
With the advancement of economic development and the increasing complexity of commodity distribution, efficient and precise anti-counterfeiting measures have garnered significant attention in recent decades. This challenge necessitates the development of flexible films exhibiting both superior mechanical and optical properties to accommodate various anti-counterfeiting applications. This study introduces a composite film comprised of waterborne polyurethane (WPU), gelatin quantum dots (QDs), and glycerol. Glycerol, employed as a plasticizer, enhances the film's plasticity by disrupting hydrogen bonds within the matrix. The tensile strength decreased from 7.7 MPa to 1.73 MPa, while the elongation at break increased from 410 % to 656 %, compared to the samples without glycerol. The resulting films exhibit advantageous properties, including facile preparation, high transmittance, excellent optical properties, and excellent mechanical performance. Additionally, the photoluminescence intensity decreased by only 15 % after being placed in air for 30 days. They demonstrate commendable stability under ambient temperature and environmental conditions, making them suitable for diverse and intricate anti-counterfeiting applications. The emission wavelength of the composite films was tuned by adjusting the cation ratio of the QDs, and the mechanical properties can be adjusted by varying the QD and glycerol contents. This work offers valuable insights for the development of advanced flexible materials for anti-counterfeiting purposes.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2025
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IF 8.4
Xiao-Ming Zou,Tiao Zhang,Yu-Hua Dong,Cui Hu,Li Yin,Yu-Ling Zheng,Mi Li,Xiao-Yu Xiao,Wei Hui
Sulfonamide antibiotics (SAs) are widely used in the biomedical field but pose an environmental risk as ecotoxic pollutants. Developing eco-friendly methods to degrade SAs into harmless compounds is crucial. In this work, biochar (BC) was prepared from rice straw via pyrolysis and used to support S-nZVI, thereby forming the S-nZVI/BC composites. The results show high SAs removal efficiency (up to 98.3%) at optimal Fe/C and Fe/S molar ratios of 3:1 and 50:1, respectively, with strong tolerance to coexisting ions. Furthermore, the effectiveness of S-nZVI/BC(Fe 3 /C 1 , Fe 50 /S 1 ) sample was validated using five real wastewaters, and the results showed consistent performance, stability and reusability. Mechanistic studies revealed that S-nZVI/BC synergized with persulfate to enhance the reactivity of sulfate-free radical (SO 4− ·) and Fe 2+ . The degradation pathways of SAs, involving electrophilic substitution and nucleophilic attack, were elucidated by density functional theory (DFT) calculations. These insights were instrumental in comprehending the degradation mechanism of SAs. Additionally, the degradation dynamics of ten SAs were further analyzed using quantitative structure-activity relationship (QSAR) models and principal component analysis (PCA). Hence, this work highlights the potential of S-nZVI/BC for industrial wastewater treatment, providing insights into the degradation mechanisms and pathways of SAs.
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Small
·
2024
·
IF 13
Ning Li,Yong Ma,Jiafeng Ma,Qing Chang,Xiangqian Fan,Lei Liu,Chaorui Xue,Caihong Hao,Huayang Zhang,Shengliang Hu,Shaobin Wang
MoS 2 /ZnIn 2 S 4 flower-like heterostructures into porous carbon (PC@MoS 2 /ZIS) are embedded. This ternary heterostructure demonstrates enhanced light absorption across a broad spectral range from 200 to 2500 nm. It features both Type-II and S-scheme dual heterojunction interfaces, which facilitate the generation, separation, and transfer of photoinduced carriers. The PC enveloped by MoS 2 /ZIS composite microspheres serves as a photothermal source, providing additional energy to the carriers. This process accelerates charge separation and migration, enhancing photothermal-assisted photocatalytic H 2 evolution. The optimal H 2 evolution rate for PC@MoS 2 /ZIS reaches an impressive 18.79 mmol g −1 h −1 , with an apparent quantum efficiency of 14.1% at 400 nm. This work presents a promising approach for effectively integrating multicomponent heterostructures with photothermal effects, offering innovative strategies for efficient solar energy utilization and conversion.
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高影响因子
Crystals
·
2024
·Vol. 14
·期 8
·728
·
IF 2.4
Boyu Wang,Zhiyuan Jiang
Recently, there has been a growing interest in skutterudite (SKD) compounds containing electronegative elements such as Br, Cl, S, Se, and Te, owing to their increased diversity and the versatility of filler atoms. This study focused on the thermoelectric performance of a series of (Ni, Te) co-doped SKDs filled with the electronegative element S, denoted as SxNi0.4Co3.6Sb11.2Te0.8(x= 0, 0.1, 0.2, and 0.3). These compounds were prepared using a combination of a solid-state reaction and spark plasma sintering techniques. The results showed that (Ni, Te) co-doping introduced excess electrons in the SKD lattice, while the incorporation of the element S into the SKD voids optimized carrier concentration. This led to a considerable increase in the absolute Seebeck coefficient to 110.6 μV K−1at ambient temperatures. The presence of S fillers induced phonon resonance scattering and point scattering, which reduced lattice thermal conductivity and ultimately improved the thermoelectric figure of meritzT, which reached 0.93 for S0.3Ni0.4Co3.6Sb11.2Te0.8at 823 K.
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高影响因子
LANGMUIR
·
2025
·
IF 3.9
Xiaowei Ma,Lin Tan,Jiaqi Xu,Jiaoyang Hao
Metal–organic frameworks (MOFs) exhibit highly adjustable porosity, structure, and versatility, properties that render them promising for electromagnetic wave (EMW) absorption applications. However, the impedance matching of these composites is poor in practical applications, thereby compromising their EMW absorption performance. In this study, a novel EMW absorbing composite was synthesized by a solution-thermal method combined with a subsequent pyrolysis process. Specifically, we introduced heteroatom (N and S) codoped graphene (N, S-Gr) into the Co–Ni MOF, forming N, S-Gr/CoNi/C. Graphene was endowed with abundant defect and disorder sites through the codoping of nitrogen and sulfur, which enhanced interfacial polarization and dipole polarization. When nickel and cobalt were added in a 1:1 ratio, the minimum reflection loss (RLmin) of the N, S-Gr/Co–Ni/C composite reached −47.7 dB at 4.24 GHz, and the resultant material exhibited the best absorption properties. As a result, this composite is considered to be an ideal candidate for the development of highly effective EMW absorbers.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
·
IF 6.3
Xiangyang Zhao,Lingling Wang,Yawei Wang,Xingyu Zhang,Rong Fang,Yue Zhou,Rui Guo,Xintong Zhang,Yichun Liu
Kesterite Cu 2 ZnSn(S,Se) 4 (CZTSSe) thin film solar cells are considered a promising new type of film cell, due to their rich elemental reservation and excellent photovoltaic performance. However, the deleterious defects at the heterojunction interface severely hinder charge transport, separation, and extraction, significantly limiting the photovoltaic performance of CZTSSe solar cells. In this study, a simple method involving the incorporation of Cd 2+ and Ag + dual-ion at the heterojunction interface was proposed to reduce interfacial defects. The results showed that Cd 2+ and Ag + dual-ion interface deposition effectively reduced the [2Cu zn + Sn zn ] harmful defects near the heterojunction interface and subsequently reduced the number of recombination centers in the interface. This led to improved carrier recombination at the interface. Meanwhile, the devices achieved a wider depletion width, which was more favorable for carrier collection. Ultimately, the conversion efficiency increased by 32.81 %. This simple interface dual-ion deposition strategy offers a promising strategy for further enhancing the efficiency of CZTSSe cells.
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ACS Catalysis
·
2024
·
IF 11.3
Heng Cao,Xiaodi Zhu,Jiawei Xue,Ruyang Wang,Jiusi Shang,Peiyu Ma,Chengyuan Liu,Jun Bao
Precise design of photocatalysts with the demanded active surface structure for highly efficient and selective CO2 photoreduction is crucial but challenging. Here, by taking CdS as a prototype, single-atom Cu is successfully constructed on Cd-deficient CdS (Cd1–xS) to improve the performance of CO2 photoreduction with H2O as proton donor. The optimal Cu/Cd1–xS with Cd vacancies (VCd)-mediated single-atom Cu exhibits nearly 100% selective CO production and a more than three-fold higher CO evolution rate compared to that of Cd1–xS. Both experimental identification and DFT theoretical simulation unveil that the VCd-mediated single-atom Cu render Cu–S pair sites to function as more catalytically active sites for dissociating H2O and promoting the corresponding proton supply, which favors the subsequent protonation of the adsorbed CO2 at the adjacent Cd sites via the two-proton coupled two-electron transfer pathway. This work demonstrates the importance of modulating proton supply from the oxidation half-reaction for facilitating the overall CO2 photoreduction, advocating an overall-reaction perspective for the design and development of highly efficient and selective CO2 conversion photocatalysts.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·
IF 0
Qin Chao,Wu Junxue,Lu Xinyu,Gu Chenggang,Guo Yang,Hu Guanjiu,Chen Min,Xia Kang,Wang Hui,Xie Mingjie
The widespread occurrence of emerging brominated flame retardant tetrabromobisphenol S (TBBPS) has become a major environmental concern. In this study, a nanoscale zero-valent iron (nZVI) impregnated organic montmorillonite composite (nZVI-OMT) was successfully prepared and utilized to degrade TBBPS in aqueous solution. The results show that the nZVI-OMT composite was very stable and reusable as the nZVI was well dispersed on the organic montmorillonite. Organic montmorillonite clay layers provide a strong support, facilitate well dispersion of the nZVI chains, and accelerate the overall TBBPS transformation with a degradation rate constant 5.5 times higher than that of the original nZVI. Four major intermediates, including tribromobisphenol S (tri-BBPS), dibromobisphenol S (di-BBPS), bromobisphenol S (BBPS), and bisphenol S (BPS), were detected by high-resolution mass spectrometry (HRMS), indicating sequential reductive debromination of TBBPS mediated by nZVI-OMT. The effective elimination of acute ecotoxicity predicted by toxicity analysis also suggests that the debromination process is a safe and viable option for the treatment of TBBPS. Our results have shown for the first time that TBBPS can be rapidly degraded by an nZVI-OMT composite, expanding the potential use of clay-supported nZVI composites as an environmentally friendly material for wastewater treatment and groundwater remediation.
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PubMed
Catalysis Science & Technology
·
2024
·Vol. 14
·期 3
·667-672
·
IF 4.4
Qiulan Huang,Ruiqin Ren,Jia Li,Muhammad Waqas,Pan Chen,Xiaotian Liu,Dujuan Huang,Zhongyun Yang,Xinglan Peng,Du-Hong Chen,Youjun Fan,Wei Chen
Fabricating highly competent and cost-effective catalysts is essential for promoting the sluggish kinetics associated with the oxygen reduction reaction (ORR). Herein, a new type of Fe, Co decorated porous carbon composite catalyst co-doped with S and N (FeCo–SNC) was prepared by a simple carbonization process. Interestingly, FeCo–SNC inherits not only the pore structure but also the large surface area of the ZIF-67 dodecahedron. Furthermore, the electronic configuration of the two catalytic centers in Fe–N–C and Co–NC was customized. On the basis of synergetic coordination between the two active sites, the fabricated FeCo–SNC showed prior stability for the ORR even after 10 000 cycles of cyclic voltammetry measurement, besides the great limiting current density of 5.99 mA cm−2 and high half potential of 0.856 V (vs. reversible hydrogen electrode), surpassing the commercially available Pt/C catalyst. Moreover, the primary active site of Fe–N–C was regulated, providing the highest catalytic activity for the ORR. This research offers a new perspective on enhancing carbon-based catalysts for the ORR without relying on precious metals and introduces a strategic method for controlling active centers.
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ENERGY & FUELS
·
2024
·
IF 5.2
Haixuan Gao,Chuanhe Ma,Jinhui Zhang,Jinchun Jiang,Ye Chen,Lin Sun,Hailong Wang
In the prior art of CZTSSe solar cells, the traditional cadmium salt (Cd-salt) CdSO4 is widely considered as a common raw material for preparing CdS buffer layers. However, in this study, we systematically demonstrated the phase structure and transmission spectra improvement effect of the other three types of Cd-salts, Cd(NO3)2, CdCl2, and CdAc2, on the CZTSSe/CdS heterojunction (HJT) compared to CdSO4. CZTSSe/CdS HJT prepared by Cd(NO3)2 showed the strongest CdS phonon characteristic peaks at 295.9 and 597.6 cm–1, indicating a pure crystal phase. The transmittance of CdS films prepared by Cd(NO3)2 is 20–35% higher than the other three Cd-salts in the light range of 350–1000 nm, which effectively improved the band gap of the films (2.41 eV) and depressed the photon absorption and scattering. Accordingly, CZTSSe solar cells based on the aforementioned Cd-salts showed that Cd(NO3)2 possessed the best ability to improve the photovoltaic conversion efficiency (PCE), about 5.7% more than the traditional CdSO4 salt. After Sn2+ replaced by Sn4+ in the precursor solution, the PCE of CZTSSe solar cells using Cd(NO3)2 exceeded 10% (Total area = 0.21 cm2, PCE = 10.23%, VOC = 0.485 V, JSC = 31.4 mA/cm2, FF = 67.1%, without MgF2 antireflective layer).
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危险品化学品经营许可证（带存储）