SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jianglong Shi,Chen Sun,Zongli Huo,Jia Gu,Jun Ma
This study demonstrated the synergy between peroxymonosulfate (PMS) and p- benzoquinone ( p -BQ) in the sulfamethoxazole (SMX) degradation under the ultraviolet (UV) irradiation. In the UV/ p -BQ/PMS process, the SMX degradation showed positive dependence on the initial dosages of PMS, p -BQ and SMX. The variation of the observed pseudo-first-order rate constant ( k obs ) exhibited aligned with the speciation of SO 5 2− across pH 7–10, and the anomalous decline of k obs emerged at pH 10–12. It suggested that SO 5 2− might be significant for the SMX degradation. The quenching experiments and the electron paramagnetic resonance spectroscopy confirmed the dominant reactive oxygen species (ROS) (i.e., sulfate radicals (SO 4 •– ), hydroxyl radicals (OH • ), singlet oxygen ( 1 O 2 ), peroxymonosulfate anion radical (SO 5 •– )) in the UV/ p -BQ/PMS process. The generation of SO 5 •– might be attributed to the single electron transfer (SET) mechanism from PMS to the triplet excited-state of p -BQ, which subsequently triggered the formation of SO 4 •– and 1 O 2 via disproportionation. The possible degradation pathways of SMX were identified by LC-MS, including the hydroxylation, the cleavage of S N bond, the nitration and the oxidation of amino group. Compared to p -BQ, methyl- p -benzoquinone, with an electron donating group, was found to suppress the activation of PMS, which validated the rationality of the SET mechanism. While tetrachloro-1,4-benzoquinone, with an electron withdrawing group, inhibited the SMX degradation by scavenging the generated radicals. Furthermore, the coexisting ions made no diffidence to the SMX degradation. The results provided the critical insights into the role of quinones in the PMS-based advanced oxidation processes for water treatment.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Fei Li,Huanshun Yin,Yan Chen,Siyu Wang,Jingyan Li,Yuemei Zhang,Chunxiao Li,Shiyun Ai
DNA formylation (5-formylcytosine, 5fC) is a major epigenetic modification involved in alterations in the DNA double helix structure and protein identification. Due to the low amount in all mammalian tissues and cells, it is necessary to develop a rapid, sensitive and efficient method for detecting 5fC for further understanding the biological functions of 5fC. Thus, a novel PEC biosensor was constructed using P-g-C 3 N 4 -WS 2 nanocomposite as photoactive material. Firstly, AuNPs/P-g-C 3 N 4 -WS 2 /ITO electrode was prepared as substrate electrode. Secondly, the probe DNA and complementary DNA (containing 5fC base) was modified to the electrode surface based on the formation of Au-S bonds between AuNPs and thiol group on the probe DNA and hybridization, respectively. Finally, the amino functionalized MnO 2 nanoflowers were further modified to the electrode surface by covalent interaction between the aldehyde group on the 5fC and the amino group on MnO 2 nanoflowers. The sensitive and specific detection of 5fC can be achieved by oxidizing ascorbic acid with MnO 2 nanoflowers and quenching the photoactivity of P-g-C 3 N 4 -WS 2 nanocomposite. The sensor has a detection range of 0.01–200 nM and a detection limit of 3.8 pM. Moreover, this sensor has excellent detection specificity, stability and reproducibility.
研究领域:
生物化学
·
分析化学
·
表观遗传学
·
纳米技术
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DOI
PubMed
高影响因子
Journal of Energy Chemistry
·
2017
·Vol. 27
·期 2
·413-418
·
IF 2.594
Yanyun Zhang,Xichuan Yang,Weihan Wang,Xiuna Wang,Licheng Sun
X1 (MeO-TPD) is an inexpensive and easily synthesized π -conjugated molecule that has been used as a hole-transport material (HTM) in solid-state dye-sensitized solar cells (ssDSSCs), achieving relatively high efficiency. In this paper, we characterize the physicochemical properties of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) and show that it is a promising p-dopant in a spin-coating solution with X1 as the HTM. The doped ssDSSCs showed an increase in short-circuit current density from 5.38 mA cm –2 to 7.39 mA cm –2 , and their overall power conversion efficiency increased from 2.9% to 4.3%. Also, ssDSSCs with DDQ-doped X1 were more stable than the undoped samples, demonstrating that DDQ can act as a p-type dopant in X1 as an HTM for highly efficient, stable ssDSSCs.
研究领域:
材料科学
·
能源化学
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光伏技术
·
纳米材料
·
半导体器件
·
表面化学
·
电化学
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高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2020
·Vol. 412
·期 4
·915-922
·
IF 3.637
Wu Zhi-Wei,Xie Xing-Chen,Guo Hong-Ran,Xia Huan,Huang Ke-Jing
A tetrahedral DNA probe can effectively overcome the steric effects of a single-stranded probe to obtain well-controlled density and minimize nonspecific adsorption. Herein, a highly sensitive electrochemical biosensor is fabricated for determination of protein using a tetrahedral DNA probe and rolling circle amplification (RCA). N- and P-co-doped graphene (NP-rGO) is prepared, and AuNPs are then electrodeposited on it for DNA probe immobilization. Benefitting from the synergistic effects of the excellent electrical conductivity of NP-rGO, the stability of the tetrahedral DNA probe and the signal amplification of RCA, the biosensor achieves a low limit of 3.53 × 10 −14 M for thrombin and a wide linear range from 1 × 10 −13 to 1 × 10 −7 M. This study provides a sensitive and effective method for the detection of protein in peripheral biofluids, and paves the way for future clinical diagnostics and treatment of disease.
Graphical abstract
研究领域:
生物化学
·
分析化学
·
生物传感器
·
分子诊断
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PubMed
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-18
·
IF 15.7
Li Taiguang,Chen Butian,Wang Tenghui,Liu Chong,Yin Wen,Mao Qianjiang,Zhou Dongxu,Hao Yongmei,Liu Xiangfeng
Solid-state sodium metal batteries have attracted great interest because of their improved safety and abundant Na resources. However, the interfacial resistances and instabilities induced by parasitic reactions, together with Na dendrite issues, result in reduced rate capability and poor cycling stability. Here, we address these challenges by intrinsically inhibiting parasitic interfacial redox reactions through enhanced P-O covalency in Na 3 Zr 2 Si 2 PO 12 (NZSP) with Na 2 SiF 6 incorporation, wherein the high electronegativity of F strengthens P-O covalency. Additionally, SnF 2 coating provides a sodiophilic surface and stabilizes the NZSP interface, which is essential for effective electrochemical cycling. This integrated approach significantly reduces interfacial impedance to 2.0 Ω cm 2 , enabling stable Na plating/stripping for 3600 hours at 0.5 mA cm -2 /0.25 mAh cm -2 . The full cell with Na 3 V 2 (PO 4 ) 3 positive electrode demonstrates stable cycling with high-rate capability (87.5% capacity retention after 2500 cycles at 1 C and 96.1% capacity retention after 1200 cycles at 5 C). This study sheds light on the development of high-performance quasi-solid-state sodium batteries.
研究领域:
储能技术
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材料科学
·
电化学
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固态电池
·
界面工程
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PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2010
·
IF 2.652
Wan-Zhong Lang,Xun-Wen Liu,Ya-Jun Guo,Bo Su,Lian-Feng Chu,Cui-Xiang Guo
We have demonstrated the synthesis of a novel MCM-41-supported bi-functional catalyst containing organoamine and Rh–P complex. We further characterized the catalysts by state-of-the-art analytical techniques including FTIR, UV–vis, 31 P CP MAS NMR, TGA, XRD, BET, TEM, ICP-AES and elemental analysis. The as-synthesized catalyst was applied to the one-pot synthesis of 2-ethylhexenal using propene as raw materials. FTIR, UV–vis, 31 P CP MAS NMR, and TGA results indicate that the active sites, organoamine and Rh–P complex, are successfully immobilized on the surface of catalyst support. The N and Rh content can be adjusted by adding different amounts of organoamine and Rh–P complex during the process of catalyst preparation. The mesoporous structure of the zeolite support remains intact after immobilization. However, the specific surface area and BJH pore size of the mesoporous zeolite support decrease after being grafted with organoamine and Rh–P complex. The bi-functional catalyst with primary amine has the best catalytic performances for the one-pot synthesis of 2-ethylhexenal since it has better synergistic effect with silanol groups, followed by diamine and then tertiary amine. The Rh content of the catalyst determines the hydroformylation reaction rate of propene, while the self-condensation of n -butanal is determined by the balance between organoamine and silanol groups. The results indicate the hydroformylation reaction is the control step of this tandem reaction when the content of Rh in the catalyst is below 0.19%. In contrast, this tandem reaction is controlled by the self-condensation of n -butanal with further increasing Rh content. We found that the catalyst containing 1.73% of N (primary amine) and 0.19% of Rh is a suitable choice. And we obtained the best yield of 2-ethylhexenal above 77% in the one-pot synthesis from propene.
研究领域:
催化化学
·
材料化学
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有机合成
·
多相催化
·
功能材料
·
工业化学
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DOI
高影响因子
ACS Applied Electronic Materials
·
2025
·
IF 4.7
Ziheng Luo,Shuai Zhang,Genshui Wang,Hengchang Nie,Shiguang Yan,Zhiyan Guo,Yuou Yuan,Liang Shi
Among typical ferroelectric materials, Bi0.5Na0.5TiO3 (BNT) has attracted significant research attention owing to its high intrinsic polarization and polymorphic phase transitions. However, the practical application of pure BNT in high-performance energy storage devices has been limited by its large remnant polarization (Pr) and broad P–E hysteresis loops. Previous studies on element-doped BNT-based materials for enhanced energy storage performance have primarily focused on improving dielectric breakdown strength (Eb) and slimming P–E loops, which typically leads to deteriorated ferroelectric properties (reduced Pmax). To overcome the above problems, this study investigates (0.94–x)Bi0.5Na0.5TiO3-0.06BaTiO3-xMgZrO3:1 mol % Mn (BNT-BT-xMZ:Mn, x = 0, 0.03, 0.06, 0.09, 0.12) thin films. MZ doping induces lattice expansion within the material, where larger domain sizes enhance polarization behavior, leading to increased Pmax (76.81 μC/cm2). Concurrently, the incorporation of MZ promotes cationic disorder, strengthening relaxor behavior. This results in nearly unchanged remnant polarization (Pr) but significantly reduced coercive field (Ec). Consequently, a large polarization difference (ΔP = 70.44 μC/cm2) and slim P–E hysteresis loops are achieved, and synergistic optimization of ferroelectric properties and relaxor characteristics enables the thin film to achieve superior energy storage performance under moderate electric fields (∼2250 kV/cm), ultimately achieving optimal comprehensive performance at x = 0.09, with a recoverable energy density (Wrec) of 55.76 J/cm3 and efficiency (η) of 79.46%. In contrast to previous unilateral approaches solely pursuing high Eb, the synergistic optimization strategy for polarization intensity and P–E hysteresis loop shape provides insights and design principles for modifying thin films as energy storage capacitors.
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iScience
·
2024
·Vol. 27
·期 2
·108818-108818
·
IF 4.6
Manlu Zhu,Haoyan Mu,Xiongfeng Dai
To thrive in nature, bacteria have to reproduce efficiently under favorable conditions and persist during stress. The global strategy that integrates the growth control and stress response remains to be explored. Here, we find that a moderate induction of (p)ppGpp reduces growth rate but significantly enhances the stress tolerance of E. coli , resulting from a global resource re-allocation from ribosome synthesis to the synthesis of stress-responsive proteins. Strikingly, the activation of stress response by (p)ppGpp is still largely retained in the absence of RpoS. In addition, (p)ppGpp induction could activate the catabolism of alanine and arginine, facilitating the adaption of bacteria to nutrient downshift. Our work demonstrates that the activation of stress response by (p)ppGpp could occur in an RpoS-independent manner and (p)ppGpp enables bacteria to integrate the control of growth and stress response in a seesaw fashion, thus acting as an important global regulator of the bacterial fitness landscape.
研究领域:
微生物学
·
分子生物学
·
细菌学
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Cailing Song,Qianwen Jin,Wen Zhang,Chenchen Hu,Zhumabay Bakenov,Yan Zhao
Lithium-sulfur (Li-S) batteries have drawn a lot of attention owing to the high theoretical capacity of 1675 mAh g −1 , environmental friendliness and relative abundance of sulfur. Nevertheless, the severe dissolution and migration of lithium polysulfides (LiPSs) and poor conductivity of sulfur greatly hinder the practical application of Li-S batteries. In this work, Fe-Ni-P@nitrogen-doped carbon (named as Fe-Ni-P@NC) derived from Fe-Ni Prussian blue analog (Fe-Ni PBA) was used as highly efficient sulfur host for Li-S batteries. The Fe-Ni-P particles not only enhance the adsorption of LiPSs but also effectively promote the conversion of LiPSs. In addition, the CN – of PBAs can readily generate nitrogen-doped carbon during pyrolysis, which can improve the conductivity of composites. Due to these advantages, Li-S batteries using S@Fe-Ni-P@NC composites cathodes exhibited good electrochemical performance with outstanding rate capability and stable cycling over 500 cycles with a lower capacity fading rate of 0.08% per cycle at 1 C.
研究领域:
材料科学
·
电化学
·
能源存储
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DOI
高影响因子
JOURNAL OF BIOMATERIALS APPLICATIONS
·
2024
·
IF 2.3
Dandan Niu,Danyang Zhou,Mengke Zhan,Lijing Lei,Jinhua Zhu,Xiuhua Liu
γ-Cyclodextrin-based metal-organic frameworks (γ-CD-MOF) were successfully synthesized using the solvent diffusion method and applied as carriers for trans-N-p-coumaroyltyramine (N-p-t-CT, NCT) to study the solubability, stability, sustained release and inhibitory activity against α-glucosidase. The solubilization effect of γ-CD-MOF on N-p-t-CT was performed using impregnation (NCT@CD-MOF-1) and co-crystallization (NCT@CD-MOF-2) methods. X-ray diffraction, scanning electron microscope (SEM), fourier transform infrared spectrometer (FTIR), and N2 adsorption/desorption were used to characterize the MOFs before and after loading NCT. The results showed that NCT@CD-MOF-2 had a better solubability for N-p-t-CT, 145.03 μg/mg of drug loading capacity could be achieved, and the solubility of NCT@CD-MOF-2 in water was 366 times higher than free N-p-t-CT. In addition, the stabilities of N-p-t-CT under temperature, UV light and pH conditions were greatly improved after encapsulation in γ-CD-MOF. Furthermore, NCT@CD-MOFs had a sustained release of N-p-t-CT over an extended period in vitro due to the primary encapsulation in pore structures. Notably, γ-CD-MOF loaded with N-p-t-CT showed superior inhibitory activity against α-glucosidase compared to free N-p-t-CT. Cytotoxicity studies demonstrated that NCT@CD-MOF-2 had low toxicity in vitro and perfect biocompatibility with HL-7702 cells, and γ-CD-MOF could reduce the toxicity of free N-p-t-CT at higher concentrations.
研究领域:
药剂学
·
生物化学
·
分子生物学
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PubMed
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2015
·Vol. 122
·期 1
·349-358
·
IF 2.042
Yu Guo-Min,Wang Li-Sheng,Sun Jian,Shao Xian-Zhao
A phosphorous flame retardant of phosphoric acid, P, P′-1, 4-phenylene P, P, P′, P′-tetraphenyl ester (PAPTE) was synthesized by diphenyl chlorophosphate and hydroquinone. The structural features of PAPTE were investigated with mass spectrometry, infrared spectroscopy, X-ray powder diffraction and nuclear magnetic resonance methods. The thermal behavior of PAPTE was carried out with thermogravimetric (TG) analysis instruments. The kinetic parameters, including the activation energy and pre-exponential factor of the decomposition process for the title compound, were calculated through the Friedman method, the Kissinger–Akahira–Sunose method and the Flynn–Wall–Ozawa method, while the thermal decomposition mechanism was also studied with the invariant kinetic parameters (IKP) method based on a set of TG data obtained at different heating rates. It was shown that the activation energies calculated for the decomposition reaction by different methods were found to be consistent with the conversion functions calculated by means of the IKP method which depend on a set of kinetic methods.
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高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2023
·Vol. 39
·期 4
·690-696
·
IF 3.1
Xu Pengfei,Hua Yezhen,Jin Kangpeng,Xu Biao
Tin selenide(SnSe) material exhibits very excellent thermoelectric properties in both p- and n-type single crystals, benefiting from advantageous electronic structure and ultra-low lattice thermal conductivity. However, poor mechanical properties and time-consuming production limit its practical application, and polycrystalline SnSe has attracted great attention in recent years. Herein, the SnSe microplates are prepared by a facile solvothermal method and compacted by spark plasma sintering (SPS). With enhanced electrical conductivity( σ ) and optimized Seebeck coefficient( S ) benefited from the Sn vacancies and increased density of states effective mass by the incorporating of heavy rare earth element Gd, an enhanced power factor(PF) value of about 0.86 mW/(m·K 2 ) is realized in the p-type polycrystalline Sn 0.985 Gd 0.015 Se sample. Combined with the medium total thermal conductivity k tot and lattice thermal conductivity k lat of 0.7 and 0.56 W/(m·K), respectively, an enhanced peak dimensionless figure of merit( ZT ) of ca. 1.1 was achieved at 873 K along vertical to the SPS pressing direction. The average ZT was also improved as compared to that of the pristine SnSe sample.
研究领域:
材料科学
·
热电学
·
固体物理
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DOI
高影响因子
危险品化学品经营许可证（带存储）