CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Lingli Wang,Yi Tang,Pu Wang,Yu Fu,Chunxiao Xu,Zhaohui Wang
Although thermally activated peroxydisulfate (PDS) is often regarded as a radical-dominant oxidation process, the accurate temperature threshold necessary for substantial radical production remains a subject of debate, despite its critical relevance for mechanism interpretations and process design optimization. Through a series of radical identification experiments (i.e., electron paramagnetic resonance (EPR) and fluorescence assays), we demonstrate that hydroxyl radical ( OH) and sulfate radical (SO 4 − ) are not genuinely produced at lower temperatures (25–47 °C). The detection of the 5,5-dimethyl-1-pyrroline N -oxide (DMPO) adduct of CH 2 OH (indicative of the H abstraction of methanol by free radicals) and hydroxylated product of the fluorescence probe coumarin, provides preliminary evidence that the temperature threshold for radical generation in the heat/PDS system is 48 °C. This threshold is further refined to 45 °C, as evidenced by the detection of hydrogen signals corresponding to the heptet of 5,5-dimethylpyrrolidin-2-one-1-oxyl (DMPOX) at this temperature, using 1 H nuclear magnetic resonance (NMR) technique. At a temperature of 80 °C, SO 4 − is initially generated in the heat/PDS system, resulting in the formation of the heptet DMPOX. In conclusion, this study clarifies the identity of SO 4 − and establishes the temperature threshold for its generation, which has significant implications for the process optimization and cost saving.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry Letters
·
2025
·
IF 4.6
Weidong Liang,Yong Zhang,Dongniu Wang,Jianzhao Peng,Jinshuo Zou,Huiqi Li,Zhongxin Song,Manlin Tan,Jun Yu,Lei Zhang
Optimizing the electronic structures of metal sites is desirable for high intrinsic activity. Incorporated metal atoms in a carbon substrate can establish strong electronic interaction with loaded metal oxides. However, this structure may be unstable in a harsh oxygen evolution reaction (OER) environment. Herein, we take the NiSAFe sample of Ni–N–C supported Fe2O3 nanoparticles (NPs) as an example. Both in situ and ex situ characterizations show that the OER activation process facilitates the transformation of Ni single atoms into atomically dispersed NiOOH active species while retaining Fe2O3 NPs. Accordingly, abundant structural defects are formed in the carbon support, enhancing electron transfer and upshifting the d-band center of the NiFe catalyst. As a result, the catalyst exhibits accelerated OER kinetics and optimized adsorption energies for reaction intermediates, delivering outstanding intrinsic activity. A low overpotential of 230 mV at 10 mA cm–2 and a turnover frequency (TOF) more than 9 times higher than that of commercial RuO2 are achieved.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Shijiang Feng,Rong Qiang,Yulong Shao,Lei Rong,Fangjie Ren,Na Xiao,Siyuan Zhang,Zheng Guo,Caihong Chen,Qing Miao
The construction of hollow structures and the incorporation of metal nanoparticles have been shown to be two potential approaches to achieving high-performance microwave absorption. In this study, a hollow polyhedron material featuring an FeN/Fe-doped carbon matrix was synthesized by an acidification corrosion and pyrolysis strategy. The formation of heterojunctions, coupled with the design of hollow structures, significantly improved the dielectric loss capacity of the material. Furthermore, the incorporation of magnetic metal nanoparticles not only increased the magnetic loss but also enriched the loss mechanisms of the material, leading to an overall improvement in the magnetic loss. Under the synergistic effects of these factors, the material exhibited exceptional microwave absorption properties. In particular, at a material thickness of only 2.3 mm, the minimum reflection loss value of the FeN/Fe@HC nanocomposite reached −64.5 dB with an effective absorption bandwidth of 5.1 GHz. These results further highlight the importance of a hollow structure design and metal atom doping in improving microwave absorption performance.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
W.H. Qiu,J.N. Ren,C.C. Yuan,Y.F. Li,X.Y. Fan,H.M. Li,M. Oleksandr,S.W. Lu,J.J. Wang,M.W. Zhu
The widespread deployment of 5 G technology has intensified the demand for electromagnetic wave absorption materials to mitigate escalating electromagnetic pollution. Herein, we reported a bioinspired ant-nest-like CoNi@C composite synthesized through a facile hydrothermal method followed by pyrolysis treatment. A lamellar CoNi-MOF precursor was first constructed, and the molar ratio of cobalt to nickel was systematically adjusted to enhance carbon graphitization, thereby tailoring the electromagnetic parameters of the composite. The synergistic interplay between the optimized composition and the unique hierarchical architecture endowed the nanocomposite with exceptional microwave absorption performance. Specifically, the ant-nest-like porous structure facilitated impedance matching, interfacial polarization, and multi-scale attenuation of incident microwaves. The Co 2 Ni 3 @C composite achieved an effective absorption bandwidth (EAB, RL ≤ -10 dB) of 6.47 GHz, with a minimum reflection loss of -50.92 dB at 13.05 GHz with a mere 30 wt% filler loading. This work establishes a versatile MOF-derived strategy for designing high-performance electromagnetic absorbers with ultrawide bandwidth and lightweight advantages.
✓ 已验证
产品关联
DOI
高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2024
·
IF 1.7
Gao Xinglong,Qiu Feifei,Xie Hongzhao,Chen Xiaopeng,Wu Chenghong,Chen Yutong,Liang Jiezhen,Wang Linlin
In the present work, efficient catalytic hydrogenation of acrylic rosin (AR) were extensively investigated. Qualitative and quantitative analysis of AR and hydrogenated acrylic rosin (HAR) were carried out by GC and GC–MS, and the reaction pathway network about catalytic hydrogenation of AR was constructed. In addition, a Pd/C catalyst with well-dispersed ultrafine nano-palladium was prepared by impregnation method using Pd(NO 3 ) 2 ·2H 2 O precursor and put into use for the catalytic hydrogenation of AR. The structural properties of the catalyst were measured via XRD, TEM, ICP-OES, XPS, and BET. The characterizations showed that the ultrafine Pd nanoparticles (NPs) with an average Pd NPs size of 2.29 nm and consisting of 3.1% Pd were equably loaded on the surface of activated carbon. Benefiting from well-dispersed ultrafine Pd NPs, the catalyst exhibits outstanding activity in the hydrogenation of AR at 180 °C and 5 MPa, which shows 1.9 times superior activity than a commercial 10% Pd/C. The quality of prepared HAR is similar to the commercial HAR (Gardner color < 1, acid value of 235 mg KOH/g, softening point of 129 °C, 35% conversion rate of acrylpimaric acids). Graphical abstract
✓ 已验证
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Jie Liu,Lin Yang,Wenju Jiang,Zhongde Dai,Lu Yao,Junfeng Zheng,Xingjian Wang
In this study, the Cu/C@Zeolite catalysts with carbon-zeolite bifunctional support was developed by using the zeolite-induced one-pot homogeneous synthesis of CuBTC composite (CuBTC@Zeolite). Three different zeolites (ZSM-5, 13X, NaY) and the activation conditions were discussed. Originating from the defective structure of CuBTC in the composite and its interactivity with the zeolite, compared to Cu/C, the Cu/C@zeolite catalysts had the hierarchical pore system, a higher content of oxygen vacancies, stronger redox properties, and more active Cu sites with smaller particle sizes and more Cu + /Cu 2+ coexisting valence states, in synergy with acid sites, all of these contributing to the improved catalytic activity for VOCs oxidation removal. The activity of toluene catalytic oxidation indicated by T 90 was in the order of Cu/C@NaY (268.5 °C) > Cu/C@ZSM-5 (280.0 °C) > Cu/C@13X (287.0 °C) > Cu/C (320.0 °C). They also performed a better activity for acetone and ethyl acetate oxidation, obtaining the lowest T 90 at 217.0 and 231.5 °C respectively when the Cu/C@NaY used. Moreover, the Cu/C@NaY and Cu/C@ZSM-5 performed good water resistance and stability, suggesting the potential in practical application scenarios. These findings underscored the potential of Cu/C@Zeolite catalysts for addressing complex VOCs in simultaneous catalytic oxidation.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEDICINAL CHEMISTRY
·
2025
·
IF 6.8
Xingyang Qiu,Qingquan Zheng,Dongdong Luo,Yue Ming,Tingting Zhang,Wenchen Pu,Min Ai,Jianhua He,Yong Peng
Cellular-mesenchymal epithelial transition factor (c-Met) is an attractive target for treating multiple cancers. Despite plentiful c-Met inhibitors have been developed, some issues, including the acquired drug resistance to c-Met inhibitors, have emerged to hamper their application in clinical treatment. Degradation of c-Met offers an opportunity to solve these issues. In this study, we developed a series of c-Met degraders, and the optimal compound 22b can efficiently degrade c-Met with a DC50 value of 0.59 nM in EBC-1 cells. Mechanistic studies revealed that compound 22b induced c-Met degradation via proteasome-mediated pathway. In addition, compound 22b suppressed the proliferation and also induced apoptosis of EBC-1 cells, outperforming the corresponding inhibitor tepotinib. Importantly, compound 22b showed favorable pharmacokinetic properties and significantly induced tumor regression in a xenograft model without obvious toxicity. In brief, this study provided compound 22b as a novel c-Met degrader for lung cancer therapy.
✓ 已验证
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2019
·Vol. 30
·期 9
·094002
·
IF 3.399
Desheng Li,Yu Zhang,Kun Rui,Huijuan Lin,Yan Yan,Xiaoshan Wang,Chao Zhang,Xiao Huang,Jixin Zhu,Wei Huang
Nanostructured manganese oxides have been regarded as promising anodes for lithium-ion batteries (LIBs) due to their high specific capacity, environmental friendliness and low cost. However, as conversion-type electrodes, their scalable utilization is hindered by intrinsically low reaction kinetics, large volume variation and high polarization. Herein, a coaxial-cable tubular heterostructure composed of a hollow carbon skeleton, Fe3O4 nanoparticles and ultrathin MnO2 nanosheets from inside out, donated as MnO2@Fe3O4@C, is synthesized via a facile two-step hydrothermal process. The unique design integrates conductive carbon and nanostructured MnO2 and Fe3O4 into a one-dimensional (1D) hierarchically open architecture, which provides abundant electrode–electrolyte contact areas, favorable heterointerfaces and ultrafast electron/ion pathways. Benefiting from these features, the MnO2@Fe3O4@C anode exhibits a high reversible capacity of 946 mAh g−1 at 200 mA g−1 after 160 cycles, and excellent cyclability with a specific capacity of 845 mAh g−1 at 500 mA g−1 after 600 cycles. This work might provide an insightful guideline for the design of novel electrode materials.
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Yanzhu Ye,Ying Liu,Zhongshui Li,Xiaohuan Zou,Hui Wu,Shen Lin
The Cu-In 2 O 3 /C nanocomposite was prepared by a simple solid-phase reduction method. The introduction of In 2 O 3 into Cu/C to form the Cu-In 2 O 3 /C nanocomposite evidently enhances the electrocatalytic activity for the selective reduction of CO 2 to CO. Specifically, the Cu-In 2 O 3 /C nanocomposite exhibits higher Faraday efficiency ( FE = 86.7%) at −0.48 V vs. the reversible hydrogen electrode (RHE) in the electrocatalytic reduction of CO 2 to CO and larger current densities (55 mA cm −2 ) under a low overpotential (−1.08 V vs. RHE). These indicate its superior performance over many of the reported Cu-based catalysts [1] , [2] , [3] , [4] . It was also found that by rationally adjusting the applied potential, tunable syngas can be formed, which can be used to synthesize formic acid, methyl ether, methanol, synthetic fuels, or other bulk chemicals through appropriate industrial processes. Furthermore, the Cu-In 2 O 3 /C nanocomposite maintains good stability in the electrocatalytic reduction of CO 2 . This work demonstrates a novel strategy to convert CO 2 into desired products with high energy efficiency and large current density under low overpotential by the rational designing of non-precious metal catalysts.
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Jiajia Zhang,Fang Cui,Linxu Xu,Qinghai Ma,Yiwen Gao,Yang Liu,Tieyu Cui
Herein, a facial stratagem for the large-scale synthesis of NiO/C nanosheets used as magnetic adsorbents is proposed by using nanoscale coordination polymers (nanoCPs) as precursors. The NiO nanoparticles (NPs) scattered on the NiO/C nanosheets have an untrasmall size (~3 nm) as well as uniform dispersion, since the Ni 2+ ions are preassembled into the nanoCPs precursors by coordination bonds and transformed to NiO NPs in situ under the restriction of carbon layers. Thanks to the small size and spatially uniform distribution of NiO NPs , fully exposed carbon matrix containing part of graphene structures, and the high specific surface area of the special nanosheet structure, the magnetic NiO/C nanosheets have an a great breakthrough in the adsorption performance toward Congo Red (CR) among many reported NiO-based materials. The maximum adsorption capacity for CR is up to 2000 mg/g, and the adsorption kinetics and thermodynamics are also systematically studied. Moreover, the NiO/C nanosheets can be separated from water and reused simply by an external magnetic field. The NiO/C nanosheets with low cost and extraordinary adsorption ability have great potential in water pollution treatment area.
✓ 已验证
DOI
高影响因子
IONICS
·
2020
·Vol. 26
·期 11
·5375-5384
·
IF 2.394
Yongjia Li,Xu Ruhui,Wei Runhong,Zhang Hui,Wang Qianwen,Yao Yaochun
Through a shape-preserving carbonization process and a further activation process, the natural porous flour was carbonized to obtain flour-derived porous carbon (FPC) with abundant pores, and FPC was applied to silicon-porous carbon anode material and its electrochemical performance was evaluated. The results show that the optimal holding temperature of preparing FPC is 750 °C, and the optimal mass ratio amount of KOH/pre-C is 2. After 100 cycles at 0.1 A g −1 , the reversible capacity of FPC is only 291 mAh g −1 , while the reversible capacities of 30%-Si/FPC composite and 100%-Si are 771.34 mAh g −1 and 1241 mAh g −1 , respectively. Although 30%-Si/FPC composite displays only 62% of 100%-Si’s capacity, it shows good cycle stability, reduces the amount of nano silicon material and the application cost in lithium-ion batteries, and improves the utilization efficiency of nano silicon material. The application of flour-derived porous carbon will promote the development of Si/C anode materials.
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Yao Liu,Wen-Bei Yu,Bai-Xiang Xu
Coating the carbon layer onto the surface of TiO 2 electrode is seen as an effective strategy to improve the electrochemical performance of lithium-ion batteries , particularly the reduced charge transfer resistance . The reduced charge transfer resistance was attributed to the chemical bonding between the phases. In this paper, however, we show that it is not only the chemical bonding but also the change of the activation energy differences that is responsible. Herein, we fabricate the carbon layer coated TiO 2 electrode (TiO 2 /C) and combine the recently proposed modified Planck-Nernst-Poisson coupled Frumkin-Butler-Volmer (MPNP-FBV) model to address the above-mentioned issues. By combining the experimental results with the electrochemical model, the charge transfer resistance and the interface behaviors are analyzed. The results show that the performance of TiO 2 /C electrode based cells is determined by the carbon layer/TiO 2 interface, while the cells based on TiO 2 electrodes are limited by the electrolyte/TiO 2 interface. Comparison between the electrochemical simulations and the experimental data indicates that this increased activation energy difference leads to the decrease of the charge transfer resistance. These results imply that activation energy difference across the interfaces can be a critical parameter for designing high performance batteries .
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）