Forests
·
2024
·Vol. 15
·期 2
·236
·
IF 2.4
Liping Yu,Wang Cheng,Meifen Tian,Zhigang Wu,Xiaoli Wei,Xing Cheng,Mingwei Yang,Xuan Ma
The medicinal value ofP. zhennanhas been documented in traditional Chinese medicine books. The aim of this paper was to study the antioxidant activity of alcoholic extracts ofP. zhennanleavesusing 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2-phenyl-4,4,5,5-tetramethylimidazolineoxyl-1-oxyl-3-oxide (PTIO) radical scavenging and ferric ion reducing antioxidant power (FRAP) assays. The active components of the leaves were identified via headspace solid-phase microextraction and gas chromatography–mass spectrometry (HS-SPME-GC-MS). The results showed that the scavenging rate of DPPH was 94.67%with an EC50 value of 0.674 mg/mL at a concentration of 2 mg/mL. The maximum scavenging rate was 47.40% at a Trolox equivalent of 0.33 mg TE/mL for PTIO radicals. The FRAP reached 84.80% at 0.20 mg/mL concentration. The results confirmed the strong antioxidant activity of the extracts. Furthermore, 44 compounds, mostly terpenoids, obtained from the alcoholic extracts ofP. zhennanleaves were analyzed using HS-SPME-GC-MS and 15 of these compounds had a relative content exceeding 1%. The strong antioxidant activity of the alcoholic extracts ofP. zhennanleaves could be attributed to the presence of copaene (33.97%), β-caryophyllene (4.42%), δ-cadinene (11.04%), γ-muurolene (4.78%), cis-calamenene (2.02%), linalool (1.04%), α-pinene (1.46%), borneol acetate (1.5%), and γ-terpinene (0.66%). This study demonstrates the potential medicinal value of alcoholic extracts ofP. zhennanleaves.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Burenbayaer Borjigin,Lan Ding,Chenghong Liu,Huiqin Li,Xiaojing Wang
The exploration of highly efficient methods for degrading VOCs, with concurrent low energy consumption and lasting reusability, holds significant appeal. In this regard, an S-type CuBi 2 O 4 /CeO 2-x heterojunction with the robust interfacial interactions is presented as an active photocatalyst for the efficient decomposition of gaseous toluene under full-spectrum irradiation. The optimal sample CC15 effectively degrades gaseous toluene at a high concentration of 1800 ppm within 2 h, achieving a notable CO 2 yield of 87.05 %, and a TOC (total organic carbon) removal rate of 89.33 %. Furthermore, CuBi 2 O 4 /CeO 2-x exhibits exceptional stability, maintaining its 100 % degradation capability over 32 cycles for nearly 64 h. Comparative characterization reveals that the superior performance derives from an abundance of oxygen vacancies and effective pre-adsorption capabilities, which facilitate rapid adsorption of VOCs on the catalyst surface, thereby increasing the likelihood of degradation reactions. Additionally, the formation of an S-type heterojunction, valence pairing between Bi 3+ and Ce 3+/4+ ions, and strong interfacial interactions serve as the primary pathways for the efficient separation of photogenerated carriers, contributing to the high CO 2 production rate and prolonged cycle stability. The present investigation underscores the significant potential of vacancy-rich S-type heterojunctions and interfacial interactions between composite components, offering excellent activity and long-term availability for VOCs removal.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Hongmin Zhang,Xiaotong Yang,Xiaona Cui,Hejie Wang,Aixin Song,Xiao Chen,Hong-Guo Liu
Chiral supramolecules have attracted great research interest due to their unique properties and functions. How to assemble them into the ordered superstructures, however, remains a challenge. In this paper, two methods have been developed to fabricate such superstructures. In method I, polystyrene- b -poly (2-vinylpyridine) (PS- b -P2VP) and S-mandelic acid (S-MA) diffused from the oil and aqueous phases respectively to the oil/water interface, combined and self-assembled into helical nanowires and nanospheres with monochirality, and formed parallel-aligned nanowire arrays and close-packed arrays at the liquid/liquid interface. In method II, PS- b -P2VP in DMF droplets was introduced into the aqueous solution of S-MA through a liquid/liquid interfacial phase transfer process. Then the polymer molecules self-assembled into helical nanowires and nanospheres with monochirality in the aqueous phase, which adsorbed at the air/liquid interface and organized into superstructures. The formation of chiral aggregates should be attributed to the induction of S-MA, while the superstructures at the interfaces were considered to result from the modulation by the interfacial pressures. This study has developed one-step techniques to assemble the chiral aggregates and superstructures, which is expected to become universal for fabrication of functional superstructures.
✓ 已验证
产品关联
DOI
高影响因子
Energy & Environmental Science
·
2012
·Vol. 5
·期 5
·6966-6972
·
IF 9.61
Lichao Yin,Jiulin Wang,Fengjiao Lin,Jun Yang,Yanna Nuli
Polyacrylonitrile/graphene (PAN/GNS) composites have been synthesized via an in situ polymerization method for the first time, which serve as a precursor to prepare a cathode material for high-rate rechargeable Li–S batteries. It is observed from scanning electron microscopy (SEM) and transmission electron microscopy (TEM) that the PAN nanoparticles, less than 100 nm in size, are anchored on the surface of the GNS and this unique structure is maintained in the sulfur composite cathode material. The electrochemical properties of the pyrolyzed PAN-S/GNS (pPAN-S/GNS) composite cathode have been evaluated by cyclic voltammograms, galvanostatic discharge–charge cycling and electrochemical impedance spectroscopy. The results show that the pPAN-S/GNS nanocomposite, with a GNS content of ca. 4 wt.%, exhibits a reversible capacity of ca. 1500 mA hg−1sulfur or 700 mA hg−1composite in the first cycle, corresponding to a sulfur utilization of ca. 90%. The capacity retention is relatively stable at 0.1 C. Even up to 6 C, a competitive capacity of ca. 800 mA hg−1sulfur is obtained. The superior performance of pPAN-S/GNS is attributed to the introduction of the GNS and the even composite structure. The GNS in the composite materials works as a three-dimensional (3-D) nano current collector, which could act not only as an electronically conductive matrix, but also as a framework to improve the electrochemical performance.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Xitao Qiao,Shuaidong Wang,Xin Han,Jiaye Qin,Yanyan Wang,Guangke Tian
Cu 2 S and Cu–S based materials with the introduction of 15 at% and 63% at% Cr respectively were prepared on carbon cloth (CC) (Cu 2 S/CC, Cu 5.6 CrS 6 /CC and CuCr 1.4 S 5 /CC) by one-pot hydrothermal synthesis. It was found that the phase composition and morphology of Cu–S undergo significant changes with the introduction of Cr content, thereby impacting their electrocatalytic hydrogen evolution reaction (HER) properties. In particular, for Cu 5.6 CrS 6 /CC, 15 at% Cr introduction facilitated the formation of a highly catalytically active Cu 7 S 4 -dominant phase and a hexagonal flake-like morphology with a large specific surface area conducive to fully exposing the catalytically active sites. The synergistic advantages in morphology and phase composition endow Cu 5.6 CrS 6 /CC with the best HER electrocatalytic performance with a low overpotential of 81 mV (10 mA cm −2 ) and 142 mV (100 mA cm −2 ), a Tafel slope of 43 mV dec −1 , and 10000 cycle stability. This study provides an idea for implementing a synergistic strategy of phase engineering and morphology modulation by introducing Cr to construct high-performance HER catalysts.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Dafeng Zhang,Dong Zhang,Yutong Zhao,Fuping Zhao,Xipeng Pu,Hengshuai Li,Junchang Liu,Xue-Yang Ji
The rational design of excellent visible light photocatalysts that efficiently utilize the solar spectrum is urgently needed. In this work, ZnIn 2 S 4 (ZIS) and Co 3 Se 4 (CS) were coupled by a multistep process involving simple ultrasonic self-assembly and calcination to form ZnIn 2 S 4 /Co 3 Se 4 (ZIS/CS) photocatalysts with synergistic S-scheme heterojunctions and photothermal effects, which realized efficient photocatalytic hydrogen (H 2 ) production with optimal H 2 yield of 2.46 mmol h −1 g −1 , superior to pure ZIS (0.47 mmol h −1 g −1 ) by a factor of 5.23. The excellent cyclic stability and wide environmental adaptability to the ionic environment of water of ZIS/CS were proved. The positive impaction of photothermal effect on the H 2 yield of ZIS/CS was investigated and confirmed by the temperature change of photocatalysts powder or photocatalytic system under light irradiation. In addition, based on a series of characterization analyses and first-principle simulation calculations, a charge transfer pathway for ZIS/CS S-scheme heterojunctions was proposed. This work provides valuable ideas and feasible research methods for the design of stable and practical photocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Jiejing Kong,Miaoqiu Tang,Yujia Luo,Shengnan Song,Ziwei Xiang,Yunlong Guo,Weiping Zhang,Guiying Li,Taicheng An
The trade-off between high visible-light response quantum yields and strong redox activity to achieve effective overall photocatalytic performance is still challengeable in the field of photocatalytic application. Herein, S-scheme heterojunction catalyst with high redox potential was developed by introducing small amount of Pt and excessive Bi into Bi 2 WO 6 /CeO 2 (denoted as BWO/CeO 2 ) through simple hydrothermal method, and applied to efficiently photocatalytic degradation of typical VOCs containing soot under visible light. It is experimentally proven that photogenerated charge transfer follows an S-scheme mechanism with interfacial Bi as a charge-transfer bridge and surface-deposited Pt as a photoexcited-electron trapper, which not only promotes charge separation but also enhances redox activity. Besides, both surface plasmon resonance of Bi nanoparticles and photothermal effect of soot trigger pyroelectric polarization of BWO to boost charge generation and separation, meanwhile induce photothermal synergistic effect of Pt/Bi-BWO/CeO 2 . All these beneficial factors lead to remarkably higher photocatalytic activity of Pt/Bi-BWO/CeO 2 catalyst in comparison with single component of photocatalysts, with higher reaction rate constant of 2.3 times than BWO/CeO 2 and 20.2 times than commercial CeO 2 . This work provides a visible photocatalytic strategy to efficiently purify VOCs containing soot, while perfectly transform soot pollutant into a valuable cocatalyst during catalytic processes.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jiawei Hu,Jiaming Li,Zhongyi Pu,Wen Xiao,Huan Yu,Zhihao Zhang,Fang Yu,Chao Liu,Qinfang Zhang
Heterostructured visible-light-responsive photocatalysts represent a prospective approach to achieve efficient solar-to-chemical energy conversion. Herein, we propose a facile self-assembly technique to synthesize NiO nanoparticles/C 3 N 5 nanosheets (NOCN) heterojunctions for hydrogen (H 2 ) evolution catalysis and hydrogen peroxide (H 2 O 2 ) production under visible light. In this regard, the black NiO nanoparticles (NPs) were tightly anchored on the surface of C 3 N 5 nanosheets (CNNS) to construct S-scheme NOCN heterojunction, enabling efficient charge separation and high redox capability. Obtained results elucidated that the incorporated NiO NPs significantly promote light-harvesting efficiency and photo-to-thermal capacity over the NOCN composites. The enhanced photothermal effect facilitates the charge carrier transfer rate across the heterojunction and boosts the surface reaction kinetics. Accordingly, the photocatalytic performances of CNNS for H 2 release and H 2 O 2 production can be manipulated by introducing NiO NPs. The modified photocatalytic properties of NOCN composites are ascribed to the synergistic effects of all integrated components and the S-scheme heterojunction formation. Impressively, the high H 2 evolution photocatalysis efficiency of NOCN nano-catalysts in seawater certifies their potential environmental applicability. Among all, the 12-NOCN nano-catalyst exhibits a higher photocatalytic efficiency for H 2 release (112.2 μmol∙g −1 ∙h −1 ) and H 2 O 2 production (91.2 μmol∙L −1 ∙h −1 ). Besides, the 12-NOCN nano-catalyst reveals excellent recyclability and structural stability. Additionally, the possible mechanism for photothermal-assisted photocatalysis is proposed. This work affords a feasible pathway to design photothermal-assisted S-scheme heterojunctions for diverse photocatalytic applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DIAMOND AND RELATED MATERIALS
·
2025
·
IF 5.1
Jiafeng Zhai,Ying Yang,Quan Pei,Zhaomen Liu,Qingfeng Zhang
Carbon materials are considered as highly promising anode candidates for potassium-ion batteries due to their abundance, cost-effectiveness and stable structure. In this study, we use a one-step solid-state pyrolysis method for synthesizing high nitrogen and sulfur co-doped hard carbon (HNSC) using pyrene precursor with a high carbon atom ratio. The prepared HNSC possesses self-template pore channels with high sulfur and nitrogen co doping, exposing abundant edge active sites that enhance potassium storage capacity. Therefore, the optimized HNSC anode displays a high reversible capacity of 364.6 mAh g −1 after 100 cycles at 100 mA g −1 , excellent rate capability of 134 mAh g −1 at 5000 mA g −1 and cycling life with specific capacity of 171 mAh g −1 over 700 cycles at 2000 mA g −1 . Additionally, the potassium ion hybrid capacitor constructed using HNSC and activated carbon exhibited stable electrochemical performance, demonstrating its potential for application. The study presents a straightforward and versatile approach for fabricating anode materials of in new secondary batteries.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Jiajun Chen,Tiantian Yu,Gang Zheng,Wenhui Ma,Chaohui Wang,Xiaoxiao Huang,Shan Fan,Yong Zhang
Heteroatom doping and good porous structure play a decisive role in the energy storage characteristic of graphene-based supercapacitors. In this study, nanocellulose/N, S co-doped graphene composite hydrogel (NC-NSGHs) electrode materials were successfully prepared by a one-step hydrothermal method. During the reaction, ammonium sulfate was used as heteroatom source and reducing agent, nanocellulose (NC) was used as spacer and electrolyte storage container, and high a concentration of graphene oxide (GO, 4 mg mL −1 ) was used to increase the bulk density of the material. The target product NC-NSGHs have ideal pore structure, good hydrophilicity, and rich heteroatom functional groups. The aqueous symmetrical supercapacitors (SCs) assembled by NC-NSGH-50 exhibits high gravimetric specific capacitance (0.3 A g −1 , 280.6 F g −1 ), volumetric specific capacitance (0.3 A g −1 , 406.9 F cm −3 ), excellent rate performance (20 A g −1 , 81.06%) and superior cyclic performance. In addition, we added GO and NC into the PVA-KOH electrolyte system and developed a new gel electrolyte PVA-GN-KOH (PGNK). The flexible solid-state supercapacitors (FSSCs) fabricated by PGNK and NC-NSGHs display a high specific capacitance of 189.9 F g −1 (0.5 A g −1 ). Even at 20 A g −1 , the rate performance of the device can reach 60.24%. The emergence of NC-NSGHs and PGNK provides new ideas for high-performance portable supercapacitors.
✓ 已验证
产品关联
DOI
高影响因子
Cell Metabolism
·
2025
·
IF 30.9
Tingting Zhou,Zhiwei Wang,Xiaowang Lv,Mengting Guo,Ning Zhang,Liangju Liu,Li Geng,Jing Shao,Ka Zhang,Mengru Gao,Aiqin Mao,Yifei Zhu,Fan Yu,Lei Feng,Xiaoyan Wang,Qixiao Zhai,Wei Chen,Xin Ma
Currently, the regulation of specific gut microbial metabolism for the development and/or treatment of hypertension remains largely unexplored. Here, we show that α-lipomycin, produced by Streptomyces aureofaciens ( S. aureofaciens ) Tü117, is upregulated in the serum of high-salt diet (HSD) mice and patients with essential hypertension. α-lipomycin causes vasodilation impairment involving transient receptor potential vanilloid 4 (TRPV4)-mediated nitric oxide and endothelium-derived hyperpolarizing factor pathways in mice. We also find that Lactobacillus plantarum ( L. plantarum ) CCFM639 attenuates the increase in blood pressure (BP) potentially through inhibiting the proliferation of S. aureofaciens Tü117 in mice. An exploratory intervention trial indicates that L. plantarum CCFM639 supplementation reduces BPs in subjects newly diagnosed with pre-hypertension or stage 1 hypertension without antihypertensive medication. Our findings provide evidence for a role of S. aureofaciens Tü117-associated α-lipomycin elevation in the pathogenesis of HSD-induced hypertension, highlighting that targeting gut bacteria serves as a new therapeutic intervention for hypertension.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science China-Chemistry
·
2025
·
IF 9.7
Liu Jie,Ye Qiu,Wu Yi,Chen Junliang,Ge Yongjie,Zhang Linjie,Abazari Reza,Qian Jinjie
Molecular catalysts like metal phthalocyanines (MPc) hold significant promise for diverse applications in renewable energy conversion and storage. Despite their inherent catalytic activity in the oxygen reduction reaction (ORR), enhancing their practical applicability necessitates addressing challenges in electrical conductivity and catalytic stability through effective control of electron distribution within the substrate. In this work, we have successfully synthesized an electrocatalyst featuring FePc molecules anchored onto N,S co-doped carbon nanorods from a pillar-layer metal-organic framework (MOF), designated as ZTB-NSCR-FePc. This MOF-derived heteroatom-doped carbon substrate could be easily obtained by direct pyrolysis of a pre-fabricated rod-like Zn-TDC-bpy. The optimized ZTB-NSCR-FePc demonstrated exceptional electrocatalytic efficiency and stability towards ORR with a positive half-wave potential of 0.890 V. When employed in a Zn-air battery, it outperformed the benchmark Pt/C air cathode, achieving a peak power density of 198.9 mW cm −2 . Finally, theoretical calculations revealed that short-range electron interactions between N/S atoms and the graphene substrate significantly enhance the anchoring effect of FePc, improve the adsorption of reaction intermediates, and thereby boost the ORR performance.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）