Catalysis Science & Technology
·
2025
·
IF 4.2
Mingkang Zhang,Jingwei Wu,Haolin Yang,Xiaohan Wang,Zebao Rui,Junfei Chen
Selective catalytic reduction of nitrogen oxides with methane (CH4-SCR) is an effective way to simultaneously eliminate NOx and CH4 emissions. Development of efficient CH4-SCR reaction system with high NOx reduction activity and selectivity is highly desirable for its commercial application. Herein, a two-part relay reaction system, including sequentially Co@S-1 and In-Ce/H-Beta catalysts, is designed for boosting CH4-SCR. In this system, the Co@S-1 with high redox ability boosts NO oxidation to NO2 and generates key intermediate CH3NO2 that can partially be in situ oxidized and the excessive can migrate to In-Ce/H-Beta. Meanwhile, the inner synergistic effect between InO+ and CeO2 species on In-Ce/H-Beta not only exhibits fair CH4-SCR performance, also facilitates the formation of NO- 3 species to react with the migrated CH3NO2 from Co@S-1. Benefiting from the combination between outer active sites synergy and inner active sites synergy, the simultaneous efficient conversion of NOx (T50 = 380 ℃) and CH4 (T50 = 425 ℃) with well durability is achieved.
研究领域:
环境科学
·
催化化学
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产品关联
DOI
高影响因子
COMPOSITE STRUCTURES
·
2025
·
IF 7.1
Fan Xie,Qiaoling Liu,Longhai Zhuo,Haitao Wei,Yuxuan Shang,Tao Liu,Zhaoqing Lu
High-performance electromagnetic interference (EMI) shielding materials with lightweight, multi-resistant properties and superior, tunable EMI shielding performance are urgently needed for next-generation integrated electronic and communication systems, particularly in portable smart devices and artificial intelligence applications. In this work, hollow h-MXene/ANF backbones with a continuous shielding network were fabricated using a facile vacuum-assisted filtration process combined with a sacrificial template method. The structurally engineered h-MXene/ANF hybrid films achieved outstanding EMI shielding effectiveness (EMI SE) of 78.9 dB and EMI specific shielding effectiveness per unit thickness (SSE/t) of 15703 dB·cm 2 ·g –1 . These exceptional properties are attributed to high ohmic losses, multiple internal reflections, polarization relaxation, and efficient losses in the hollow MXene conductive layer, facilitated by impedance mismatches within the sandwich structure. Notably, the EMI SE performance can be tuned by adjusting the content of hollow MXene microspheres. In addition, extensive hydrogen-bonding interactions between the high-performance ANF and MXene contribute to enhanced mechanical properties, including tensile strength of up to 37 MPa, as well as excellent thermal stability and self-cleaning capabilities. Overall, the sandwich-structured h-MXene/ANF hybrid films exhibit superior mechanical strength, multi-resistant properties, and ultra-high, tunable EMI shielding performance, making them promising candidates for advanced EMI shielding in next-generation portable smart electronic devices.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
高影响因子
STAR Protocols
·
2022
·
IF 0
Tao Shen,Wenhao Li,Yan Zhao,Yunqi Liu,Yang Wang
Summary Syntheses using classic coupling reactions can be tedious, leading to a dearth of ambipolar semiconducting polymers. Here, we detail the rapid synthesis of balanced ambipolar polymers by using a carbon-hydrogen (C–H) activation strategy. Using this protocol, two C–H reactive hydrogenated monomers and six ambipolar polymers can be rapidly synthesized within 2 h via C–H activation and the optoelectronic properties of the resultant polymers can be characterized. We also describe the fabrication process and performance evaluation of the ambipolar polymers-based organic transistors. For complete details on the use and execution of this protocol, please refer to Shen et al. (2022) .
研究领域:
材料科学
·
有机电子学
·
化学合成
✓ 已验证
DOI
PubMed
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Wei Li,Fei Wang,Xiao-shan Chu,Xiao-yun Liu,Yan-yan Dang
Water splitting by photocatalysis technique is regarded as an eco-friendly hydrogen production strategy. However, the poor photoresponsivity and automatic electron-hole recombination greatly restrict the HER performance of conventional semiconductor photocatalyst. Here, to utilize the stable electrochemical property of hexagonal phase boron nitride (h-BN) and improve its defect of wide bandgap ( E g ≈ 4.2 eV), reduced graphene oxide (rGO) was applied to construct three-dimensional (3D) porous h-BN/rGO hybrid accompanied by a carbon-doping strategy without template assistance, then a carbon-doped 3D porous h-BN/rGO (C-BNRG) hybrid with large BET surface area was successfully prepared. As the synergistic effect of h-BN/rGO heterointerface and carbon-doping, the improved photoresponsivity and electrochemical property were presented, and the resultant 3D porous C 0.4 -BNRG hybrid presented not only greatly enhanced HER activity (157.63 μmol·g −1 ·h −1 ) but excellent durability in pH = 8.5, which was prominently higher than pristine h-BN (～36.7 times), C-BN (～12.1 times) and 3D porous BNRG hybrid (～7.0 times). This study offers a template-free approach to develop non-metallic based 3D porous hybrid for outstanding HER performance.
研究领域:
材料科学
·
能源化学
·
光电催化
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2025
·
IF 17.7
Hao Wu,Xian Jiang,Jingyu Lu,Yibo Li,Xinyan Li,Guidong Ju,Rengui Li,Jing Zhang
The hydrogen evolution reaction (HER) in alkaline water electrolysis faces significant kinetic and thermodynamic challenges that hinder its efficiency and scalability for sustainable hydrogen production. Herein, we employed an in-situ synthesis strategy to incorporate H atoms into the PdRu alloy lattice to form H Inc -PdRu electrocatalyst, thereby modulating its electronic structure and enhancing its alkaline HER performance. We demonstrate that the incorporation of H atoms significantly improves electrocatalytic activity, achieving a remarkably low overpotential of 25 mV at 10 mA cm –2 compared with the Pd, Ru and PdRu catalysts while maintaining robust catalyst stability. Operando spectroscopic analysis indicates that H insertion into the H Inc -PdRu electrocatalyst enhances the availability of H 2 O* at the surface, promoting water dissociation at the active sites. Theoretical calculations proposed that the co-incorporating H and Ru atoms induces s-d orbital coupling within the Pd lattices, effectively weakening hydrogen adsorption strength and optimizing the alkaline HER energetics. This work presents a facile approach for the rational design of bimetallic electrocatalysts for efficient and stable alkaline water electrolysis for renewable hydrogen production.
研究领域:
电催化
·
氢能
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材料科学
·
可再生能源
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CONTROLLED RELEASE
·
2016
·
IF 7.441
Xiangting Zhuang,Tingting Wu,Yongdan Zhao,Xiaomeng Hu,Yuling Bao,Yuanyuan Guo,Qingle Song,Gao Li,Songwei Tan,Zhiping Zhang
Nanoimmunotherapy, the application of nanotechnology for sustained and targeted delivery of antigens to dendritic cells (DCs), has attracted much attention in stimulating antigen-specific immune response for antitumor therapy. In order to in situ deliver antigens to DCs for efficient antigen presentation and subsequent induction of strong cytotoxic T lymphocytes (CTL) response, here we developed a multi-peptide (TRP2 180–188 and HGP100 25–33 ) and toll-like receptor 4 agonist (monophosphoryl lipid A) codelivery system based on lipid-coated zinc phosphate hybrid nanoparticles (LZnP NPs). This delivery system equips with the chelating property of zinc to realize the high encapsulation efficiency with antigenic peptides and the influence on immune system with adjuvant-like feature. The combination of H-2K b and H-2D b -restricted peptides could provide multiple epitopes as the target of specific MHC alleles, making tumor more difficult to escape from the surveillance of immune system. The formulated LZnP nano-vaccine with the size of 30 nm and outer leaflet lipid exhibited antitumor immunity as the secretion of cytokines in vitro and increased CD8 + T cell response from IFN-γ ELISPOT analysis ex vivo . The antitumor effects were further evidenced from the prophylactic, therapeutic and metastatic melanoma tumor models compared with free antigens and single peptide-loaded nano-vaccines. These results validate the benefit of LZnP-based vaccine for antitumor immunity and indicate that co-delivery of tumor antigens along with adjuvant may be an optimized strategy for tumor immunotherapy .
研究领域:
纳米技术
·
免疫学
·
肿瘤学
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药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2020
·
IF 5.006
Feng Lin,Yulong Ma,Yonggang Sun,Xiuqin Men,Yingbo Zhu,Tingting Gao,Kanghe Zhao
Strategies for catalytic lignin depolymerization to yield ethylbenzene chemicals are green, sustainable and environmentally friendly methods. In this study, a series of Ni-CeO 2 /H-ZSM-5 catalysts were prepared via the precipitation method, which catalytically degraded the β-O-4 chemical bonding structure to yield ethylbenzene chemicals. The 2-(2-methoxy-phenoxy)-1-phenylethanol substance (β-O-4) was selected as a typical lignin model compound for the investigation of the intrinsic depolymerization mechanism and the catalytic performance. The results demonstrated that the introduced CeO 2 active phase can effectively promote the catalytic conversion of the β-O-4 chemical bonding structure to ethylbenzene chemicals. Physicochemical data demonstrate that the reaction pathways and hydrogenation selectivity were effectively regulated and controlled by the tuning of the dehydration and hydrogenolysis processes via the introduction of CeO 2 , which realized the selective adjustment of the redox properties and the surface valence states of active species in the catalytic process due to its excellent oxygen transfer performance.
研究领域:
催化化学
·
生物质转化
·
材料科学
✓ 已验证
DOI
高影响因子
Small
·
2024
·Vol. 20
·期 26
·2310226
·
IF 13
Zhongwei Man,Zheng Lv,Yangyang Cao,Zhenzhen Xu,Qing Liao,Jiannian Yao,Feng Teng,Aiwei Tang,Hongbing Fu
Organic afterglow materials have significant applications in information security and flexible electronic devices with unique optical properties. It is vital but challenging to develop organic afterglow materials possessing controlled output with multi-stimuli-responsive capacity. Herein, dimethyl terephthalate (DTT) is introduced as a strong proton acceptor. The migration direction of N─H protons on two compounds Hs can be regulated by altering the excitation wavelength (Ex) or amine stimulation, thereby achieving dual-stimuli-responsive afterglow emission. When the Ex is below 300 nm, protons migrate to S 1-2 DTT , where strong interactions induce phosphorescent emission of Hs , resulting in afterglow behavior. Conversely, when the Ex is above 300 nm, protons interact with the S 0 DTT weakly and the afterglow disappears. In view of amine-based compounds with higher proton accepting capabilities, it can snatch proton from S 1-2 DTT and redirect the proton flow toward amine, effectively suppressing the afterglow but obtaining a new redshifted fluorescence emission with Δλ over 200 nm due to the high polarity of amine. Moreover, it is successfully demonstrated that the applications of dual-stimuli-responsive organic afterglow materials in information encryption based on the systematic excitation-wavelength-dependent (Ex-De) behavior and amine selectivity detection.
研究领域:
材料科学
·
光学材料
·
刺激响应材料
·
信息加密
·
物理化学
✓ 已验证
DOI
高影响因子
ACS Omega
·
2020
·
IF 2.87
Zhenghong Zhou,Kangfei Hu,Jiawei Wang,Zhibin Li,Yan Zhang,Zhenggen Zha,Zhiyong Wang
An electrochemical synthesis for quinazolines and quinazolinones was developed via a C(sp3)-H amination/C-N cleavage by virtue of the anodic oxidation. The reaction can be carried out in aqueous media under mild conditions to afford the desired products with high yields. The reaction mechanism was proposed after detailed investigation.
研究领域:
有机化学
·
电化学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Shanshan Ding,Danjun Mao,Shaogui Yang,Fei Wang,Lingjun Meng,Mengshu Han,Huan He,Cheng Sun,Bin Xu
The novel boron nitride coupled Bi-rich Bi 4 O 5 Br 2 layered microspheres (h-BN/Bi 4 O 5 Br 2 -LMs) were successfully synthesized via a facile ionic liquid-in-water (IL/W) microemulsion-mediated route. The physical, chemical and optical properties of these heterojunction photocatalysts were thoroughly characterized with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectrometry (EDS), transmission electron microscopy (TEM) and UV–vis diffuse reflection spectroscopy (DRS). Their photocatalytic activities were primarily evaluated by degradation of 4- tert -butylphenol (PTBP), which found 1.0 wt% h-BN/Bi 4 O 5 Br 2 -LMs to be the best one. The photocurrent experiments showed that the photocurrent density of 1.0 wt% h-BN/Bi 4 O 5 Br 2 -LMs was four times higher than that of pure Bi 4 O 5 Br 2 -LMs due to enhanced charge transfer ability of the former. It revealed that the addition of h-BN was in favor of suppressing the photoinduced electron-hole pair recombination of Bi 4 O 5 Br 2 -LMs, so as to improve the photocatalytic activity of the composite. O 2 − and h + were proved to be the main reactive species in the photocatalytic process by scavenger experiments and electron paramagnetic resonance (EPR) spectra. In addition, the photocatalytic mechanism of h-BN/Bi 4 O 5 Br 2 -LMs was further elaborated in this work. The probable degradation products were identified by GC–MS. The proposed conjugated addition and oxidation reactions were described to be the main pathways by combining the frontier electron density calculation and GC–MS results.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 51
·2208676
·
IF 19.924
Bo Pang,Zuquan Jin,Yunsheng Zhang,Zhiyong Liu,Wei She,Penggang Wang,Yong Yu,Xiaoying Zhang,Chuansheng Xiong,Ning Li,Guowen Sun,Peng Zhao,Guojian Liu,Xiaoyun Song,Song Gao
Cement-based sensors (CBSs) have demonstrated potential in structural health monitoring (SHM) despite rare applications due to their poor flexibility and sensing accuracy/protection with robustness. Herein, a promising strategy is reported to design a waterborne epoxy resin (WEP)-modified cement-based composite coating sensorcapable of simultaneous stable SHM and durable protection. The interpenetrating network (IPN) formed by WEP within cement paste is bionic to the toughness and crack resistance of biological muscle tissue and balances the ion permeation performance and polarization of hydration products. The polymerization-redispersion progress and mechanism of calcium silicate hydrate (C-S-H) gel modified with [3-(2-aminoethylamino)-propyl]trimethoxysilane silsesquioxane (C-POSS) are characterized and revealed. The results show that the muscle-like IPN increases the cement-based coatings’ maximum deflection angle to 30° and improves the monitoring accuracy of compressive, tensile, and fatigue microchanges of concrete structures to more than 95%. The POSS···Ca 2+ ···C-S-H interaction in C-POSS partially transferred the intra-adhesive hydrogen bonds surrounding the nanoconducer into electrostatic bridging ones to maintain an excellent electromechanical conductive dispersion.
研究领域:
土木工程
·
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2018
·
IF 0
Xu Huang,Xuezhang Xiao,Xuancheng Wang,Zhendong Yao,Chuntao Wang,Xiulin Fan,Lixin Chen
Li-Mg-B-H system with the composition of 2LiBH 4 -MgH 2 is one of the most promising reversible hydrogen storage materials because of the extremely high hydrogen storage capacity (11.5 wt%). Yet, sluggish kinetics with high desorption temperature (~ 400 °C) hindered its practical applications. Herein, a highly efficient catalyst of nanoNi@g-C 3 N 4 , comprised of transition metal nanocatalyst and carbon-based nonmetal material, was designed and fabricated to dramatically reduce its initial hydrogen desorption temperature to as low as ~105 °C, and eliminate induction period between the two dehydrogenation steps of 2LiBH 4 -MgH 2 by reducing the activation energy for the dehydrogenation of LiBH 4 from 200±6 to 126±7 kJ/mol. Multiple postmortem analyses revealed that the in situ formed MgNi 3 B 2 NPs and the H + defects on g-C 3 N 4 play the key role in synergically enhancing the hydrogen reversible desorption/absorption kinetics at low temperature: 1) in situ formed MgNi 3 B 2 acts as nucleation center of MgB 2 and leads to an excellent catalytic effect to accelerate the dehydrogenation kinetics of 2LiBH 4 -MgH 2 ; 2) the H + defects on g-C 3 N 4 , will interact with the H – in LiBH 4 to trigger the release of H 2 at low temperature and destabilize LiBH 4 and MgH 2 to form Li 3 N and Mg 3 N 2 respectively for the high electronegativity of N: 3) these in situ formed intermediates of Li 3 N and Mg 3 N 2 will be readily rehydrogenated as highly reversible Mg(NH 2 ) 2 and LiH. This novel transition metal and g-C 3 N 4 catalytic composites could provide alternative insights into designing nanosized catalytic hydrogen storage system with low desorption temperature and high capacity for hydrogen-fueled applications.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
危险品化学品经营许可证（带存储）