ACS Nano
·
2019
·
IF 13.903
Hao Ren,Xiaoli Sun,Chengfeng Du,Jin Zhao,Daobin Liu,Wei Fang,Sonal Kumar,Rodney Chua,Shize Meng,Pinit Kidkhunthod,Li Song,Shuiqing Li,Srinivasan Madhavi,Qingyu Yan
Electrocatalysts are one of the most important parts for oxygen evolution reaction (OER) to overcome the sluggish kinetics. Herein, amorphous Fe–Ni–P–B–O (FNPBO) nanocages as efficient OER catalysts are synthesized by a simple low-cost and scalable method at room temperature. The samples are chemically stable, in clear contrast to reported unstable or even pyrophoric boride samples. The Fe/Ni ratio of the FNPBO nanocages can be continuously adjusted to optimize the OER catalytic performance. The FNPBO nanocages composed of multicomponent elements can weaken the metal–metal bonds, thus rearranging the electron density around the catalytic metal atom centers and reducing the energy barrier for intermediate formation. Hence the optimized FNPBO (Fe6.4Ni16.1P12.9B4.3O60.2) catalyst shows superior intrinsic electrocatalytic activity for OER. The low overpotential to afford the current density of 10 mA cm–2 (236 mV), the small Tafel slope (39 mV dec–1), and the high specific current density (26.44 mA cm–2) at a given overpotential of 300 mV make a sharp contrast to state-of-the-art RuO2 (327 mV, 136 mV dec–1, and 0.028 mA cm–2, respectively).
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PubMed
高影响因子
ACS Applied Nano Materials
·
2019
·
IF 0
Fu Chen,Hui Luo,Yongzhi Cheng,Jieling Liu,Xian Wang,Rongzhou Gong
Electromagnetic (EM) interference and radiation affecting human health and the operation of precision electronic devices have drawn considerable attention in recent years. Herein, a promising microwave-absorbing material, Ag nanoparticles (AgNPs)-decorated Fe/Fe3O4@N-doped carbon (NC) composite, was designed and fabricated with the Fe2O3@polydopamine@Ag hexagonal plates as the precursor. Crystalline structure, phase conversion, micromorphology, static magnetic properties, and EM characteristics of the samples were studied by various analytical techniques. The EM parameters of the obtained samples could be manipulated by increasing the pyrolysis temperature, exhibiting gradually enhanced dielectric and magnetic loss. Optimizing the coating thickness turns out to be a critical factor for regulating microwave absorption. The product obtained at 600 °C performs a maximum reflection loss (RL) value of −37.5 dB (10.64 GHz, 1.6 mm) and an effective absorption bandwidth (RL < −10 dB) up to 7.36 GHz (10.64–18 GHz) with a thickness of only 1.4 mm. In addition, the possible EM wave absorption mechanisms were further investigated in detail. In sum, it has been confirmed that the as-obtained AgNPs-decorated Fe/Fe3O4@NC composite with ultrabroad absorption bandwidths and strong absorption capacity would be an attractive candidate material for effective EM absorption materials in the future.
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ACS Omega
·
2019
·
IF 2.584
Yuxiang Wu,Yan Huang,Hong Huang,Yaseen Muhammad,Zuqiang Huang,Joseph Winarta,Yanjuan Zhang,Shuangxi Nie,Zhongxing Zhao,Bin Mu
Silkworm excrement is a very useful biomass waste, composed of layer-structured fats and proteins, which are great precursors for carbon composite materials. In this work, new porous composites derived from silkworm excrement were prepared for selective separation of flavor 4-methylanisole from the binary 4-methylanisole/4-anisaldehyde mixture. In particular, the silkworm excrement, possessing a unique nanosheet structure, is converted into a graphite-like carbon by a simple calcination strategy followed by a metal-ion-doping procedure. This Fe@C composite exhibits a special nano-spongy morphology, anchoring Fe3C/Fe5C2 on the carbon nanosheets. Density functional theory simulations showed that 4-methylanisole presents a stronger π–π interaction and attraction forces with sp2 carbon nanosheets in Fe@C composites than 4-anisaldehyde. The selective adsorption experiments further confirmed that the Fe@C composites exhibited a 4-methylanisole capacity of 7.3 mmol/g at 298 K and the highest selectivity of 17 for an equimolar 4-methylanisole/4-anisaldehyde mixture among the examined adsorbents including MOFs and commercial activated carbon materials, which demonstrates the potential of this low-cost and eco-friendly porous carbon material as a promising sustainable adsorbent.
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PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2019
·Vol. 30
·期 6
·1908365
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IF 15.621
Xiaoyan Chen,Huilin Zhang,Meng Zhang,Peiran Zhao,Ruixue Song,Teng Gong,Yanyan Liu,Xinhong He,Kuaile Zhao,Wenbo Bu
Chemodynamic therapy (CDT) by introducing the Fenton-/Fenton-like reaction in an acidic and H 2 O 2 environment for toxic hydroxyl radical (•OH) generation, is a newly developed tumor-selective therapeutic. However, tumor acidosis, characterized by extracellular acidity (pH e ≈ 6.5) and intracellular alkalinity (pH i ≈ 7.2), undoubtedly confers a large chemical barrier for effective implementation of intracellular CDT and thus limits its functional activity and therapeutic efficacy. Here, the unique amorphous iron nanoparticles (AFeNPs) loaded with carbonic anhydrase IX inhibitor (CAI) are constructed to re-establish tumor acidosis with decreased pH i and increased pH e via inhibiting the over-expressed CA IX in cancer cells by CAI for self-enhanced CDT. The suppression of CA IX leads to H + accumulation in cells that could accelerate the AFeNPs-based Fenton reaction to drastically exacerbate oxidative stress in cells and subsequently induce cell death; meanwhile, the inhibition of H + formation outside cells efficiently represses the potential of tumor invasion and metastasis owing to the insufficient acidic ions for degradation of tumor extracellular matrix. Re-established tumor acidosis not only assists in the optimization of CDT, but also presents an opportunity for the development of new antitumor methods that are more tumor-acidity specific.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2019
·Vol. 166
·期 15
·B1594
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IF 3.12
Huiming Tian,Bing Tan,Xueming Dang,Huimin Zhao
Detecting hydrogen peroxide (H2O2) is obviously indispensable on account of its low toxicity and wide application, and it is still a challenge for developing highly sensitive and selective electrochemiluminescence (ECL) sensors based on the noble metal-free electrode. Hence, we designed an accurate ECL sensor for detecting trace H2O2 based on N-doped porous carbon containing Fe (Fe/N-C) nanocomposites, which were successfully synthesized by pyrolysis of NH2-MIL-101(Fe) metal-organic framework (MOF). Fe/N-C nanocomposite significantly improved the electron transfer process and enhanced the catalytic activity of ECL sensor for trace H2O2 detection. Fe/N-C nanocomposite significantly contributed in the conversion of H2O2 to superoxide radical, followed by the oxidation of luminal which enhanced the electrochemical luminescence signal. Predictably, the ECL sensing strategy at Fe/N-C nanocomposite electrode showed a satisfying linear range from 1 nM to 300 nM for H2O2 detection with limit of detection (LOD) as 0.93 nM (signal to noise ratio (S/N) = 3). Also, the ECL sensor was used to detect H2O2 in real water samples and renal epithelial 293T cells, which justified great promise for the practical ECL detection of H2O2.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 41
·19490-19501
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IF 4.682
Jin Mengjing,Wu Caixia,Li Xiaopeng,Bai Yunfei,Sun Guowen,Bai Zhaowen,Wang Gang,Wu Hongchang,Zhou Jinyuan,Li Jian,Pan Xiaojun,Xie Erqing
The MOFs materials exist potential application prospects in the energy storage field for their high specific surface area and porosity. However, the MOFs materials also suffer from poor conductivity during the charging and discharging processes. Compared with MOFs, MOFs-derived metal oxides not only inherit the porosity of the MOFs, but also present high conductivity owing to the derived carbon. Herein, an effective approach for encapsulating CoFe 2 O 4 into the derived carbon, which not only increases their conductivity but also restrains the volume expansion, and had excellent reaction kinetics. In this work, CoFe 2 O 4 nanoparticles have been synthesized by one-step annealed process. The electrode is used as the anode for LIBs and found to have long-term stability of 491 mAh g −1 at a current density of 1.0 A g −1 even after 500 cycles. The CoFe 2 O 4 electrode exhibits appreciable electrochemical performance, including 783 and 482 mAh g −1 at the current densities of 0.1 and 2.0 A g −1 , respectively. Such excellent electrochemical properties are ascribed to the porous structure of MOFs, which effectively promotes ion/charge transmission. This will guide material design and optimization of battery communities and electrochemical energy storage applications. Graphical abstract
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Lixiao Yang,Mingye Zhu,Hongzhu He,Wenjuan Yang,Xiao Wei,Aixia Chen
Waste Shatian pomelo peel was converted into a cellulose aerogel precursor. • An Fe-based MOG/cellulose carbon aerogel was fabricated by in situ growth. • The aerogel enabled efficient oxytetracycline adsorption and magnetic recovery. • The biobased adsorbent showed good recyclability and regeneration stability. Biomass aerogels often face a trade-off between adsorption capacity and recoverability in antibiotic removal. To address this limitation, Shatian pomelo peel, an abundant agricultural byproduct from pomelo processing, was used as a cellulose precursor to fabricate a pomelo peel-derived porous cellulose material (PPCM). An Fe-based metal-organic gel (MOG) was introduced in situ as an Fe-containing precursor, followed by high-temperature carbonization to prepare an Fe-MOG-derived magnetic carbon aerogel (FMCA) containing Fe species, a well-developed porous structure, and magnetic responsiveness. After response surface optimization, the resulting FMCA achieved an adsorption capacity of 836.1 mg g −1 for oxytetracycline (OTC) at an initial concentration of 100 mg L −1 and exhibited a saturation magnetization of 50.28 emu g −1 , enabling rapid magnetic separation under an external magnetic field. After five adsorption-desorption cycles, the material retained approximately 70% of its initial adsorption capacity. The kinetic and isotherm data were best described by the pseudo-second-order and Langmuir models, respectively. Combined pore-structure, zeta-potential, FT-IR, XPS, and batch adsorption results indicated that OTC uptake involved pore filling and multiple interfacial interactions. These results demonstrate that coupling in situ Fe-based MOG incorporation with carbonization is an effective strategy for simultaneously improving adsorption efficiency and recoverability in pomelo peel-derived aerogels, offering a promising route for agricultural byproduct valorization and antibiotic-contaminated water treatment. Download: Download high-res image (293KB) Download: Download full-size image
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高影响因子
Catalysts
·
2023
·Vol. 13
·期 12
·1474
·
IF 3.9
Yuhang Cai,Anping Yin,Jianxiang Zhang,Jiatai Wang,Xiaofei Qin,Yibo Yang,Gaolei Qin,Xiaodong Sun,Peng He,Yong Yang
This study focuses on the synthesis and evaluation of carbon−coated Ni−Fe alloy catalysts (NiFex@C, x = 0, 0.3, 0.7, 1.1) for the hydrogenation of cinnamaldehyde. The catalysts were characterized using Transmission Electron Microscopy (TEM), X-ray Diffraction (XRD), Raman spectroscopy, and X-ray Photoelectron Spectroscopy (XPS). The introduction of Fe was found to increase the average particle size of the bimetallic catalysts compared to the monometallic Ni@C. Ni existed in both metallic and oxide states, while Fe exhibited multiple oxidation states in the bimetallic catalysts. The carbon layer, approximately 2–3 nm thick, was confirmed to envelop the alloy particles. The catalytic performance of carbon−coated Ni−Fe alloy catalysts indicated that the addition of Fe to Ni@C enhanced the selectivity towards hydrocinnamaldehyde (HCAL), with NiFe0.7@C showing the highest selectivity (~88.6%) but at a reduced conversion rate. The carbon layer played a pivotal role in the stability and reusability of the catalysts. NiFe0.7@C maintained consistent performance over multiple reaction cycles, while NiFe0.7NPs (without a carbon layer) exhibited significant deactivation. Both catalysts displayed strong magnetism, facilitating easy separation from the reaction mixture. This study sheds light on the significance of the carbon layer in bimetallic catalysts and provides valuable insights for designing efficient catalysts for hydrogenation processes.Keywords:cinnamaldehyde hydrogenation;bimetallic catalysts;carbon−coated nanoparticles;Ni−Fe alloy;catalyst reusability
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2023
·
IF 5.7
Wei Zhou,Yutong Ren,Zhipeng Sun,Ling He,Ling Pan,Peng Xiao,Yang Li
High-temperature molten silicate deposit corrosion has become a critical factor for the failure of thermal barrier coatings. In this work, promising ytterbium hafnate ceramics with different HfO 2 content were prepared by solid-phase reaction, and the effect of HfO 2 content on Fe-containing silicate corrosion behavior of ytterbium hafnate ceramics was investigated. The evolution of HfO 2 content showed negligible influences on reaction products and corrosion mechanism. The attack of Fe-containing silicate melts on the ceramic led to the formation of a reaction layer consisting of apatite, fluorite, and garnet. This layer plays a critical role in preventing further penetration of the melts. However, ytterbium hafnate ceramics with lower HfO 2 content showed better resistance to melt attack.
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高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Dedi Liu,Dapeng Dong,Zhenyi Zhang,Yangyang He,Zhenghua Li,Jinhai Niu,Naisen Yu,Hongsheng Jia
Encapsulating organic dyes within porous solids is an efficient way to design luminescent composite materials and devices. However, for practice applications, the luminescence tuning and the stability investigation of such materials is still a challenge work. Here, a comparative in situ Raman spectra and photoluminescence (PL) spectra are employed to study the structural and optical property of both pure Rhodamine B (RHB) and samples absorbed on a kind of typical materials of institute lavoisier frameworks (MIL) under high pressure, respectively. The luminescence of RHB@MIL 53(Fe) can persist to pressures much higher than that for pure RHB. Our studies revealed that the PL emissions of RHB origin from monomeric and dimeric structures, respectively. Furthermore, our results indicated that the confining effect of MIL 53(Fe) pores inhibited the dimerization of RHB molecules under high pressure.
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2023
·
IF 4.3
Hongyun Xue,Gansheng Shi,Guanhong Lu,Xinhong Xu,Xiaomeng Ren,Yan Wang,Xiao Wang,Xiaofeng Xie,Jing Sun
Constructing heterojunction structures is considered one of the effective methods to improve the activity of photocatalysts. A novel Z-Scheme heterojunction Fe-BDC/TiO 2 was designed and synthesized by amorphous gel Fe-BDC and TiO 2 nanoparticles with electrostatic self-assembly method. The introduction of Fe-BDC has been proved to expand the light absorption range and promote the separation and transfer of interface photo generated electrons and holes. Thus, the photocatalytic degradation efficiency of acetaldehyde by 5% Fe-BDC/TiO 2 sample is 2.3 times than that of pure TiO 2 sample. And the reaction rate is 2.5 times than that of pure TiO 2 sample. The free radical capture experiment shows that O 2 − played a more important role in the degradation of acetaldehyde. In addition, in situ infrared analysis further reveals the surface species of the photocatalysts during adsorption and degradation processes. The acetaldehyde degradation route of Fe-BDC/TiO 2 has been speculated. ‘1These findings provide valuable references for the design of metal oxide semiconductor/Fe based MOF heterojunctions and the efficient degradation of aldehyde VOCs.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Jing Li,Junjie Yang,Hui Ren,Xinhui Wang,Yuecheng Xu,Yong Guo,Dan Xiao
In this study, we present an electrochemical sensor with superior sensitivity and selectivity for dopamine (DA) detection. The sensor was created using a nanocomposite of iron-iron carbide nanoparticles decorated with carbon nanotubes (Fe-Fe 3 C@CNTs) to modify a glassy carbon electrode (GCE). The Fe-Fe 3 C@CNTs nanocomposite can be synthesized by a facile microwave-assisted synthesis method with just adopting ferrocene and carbon fiber as raw material and heat source, respectively. The electron microscopy (EM) results indicate that the Fe-Fe 3 C nanoparticles encapsulated with graphitic layer were decorated with CNTs. An investigation of the electrochemical responses of the Fe-Fe 3 C@CNTs/GCE sensor to DA was performed using both cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Notably, in ideal experimental settings, the sensor demonstrated a minimal limit of detection (LOD) of 0.01 μM within a range of linearity from 0.05 to 40 μM, even under a high concentration of uric acid (UA) interference. Moreover, the utility of the produced Fe-Fe 3 C@CNTs/GCE sensor was further validated through successful DA testing in urine samples of human.
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高影响因子
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