SENSORS AND ACTUATORS B-CHEMICAL
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2021
·
IF 7.46
Jun Yao,Zhuang Xie,Xiang Zeng,Li Wang,Tingting Yue
Cholesterol is one of the most significant indicators to assess health status. Lanthanide metal-organic frameworks (Ln-MOFs) have a unique luminescence mechanism, which makes it possess tremendous potential in biomonitoring. Thus, on the basic of intramolecular charge transfer theory and quenching effect, the metal-organic frameworks (MOFs) doped by europium was constructed to respond to the cholesterol in serum. The charge transfer direction and the sensing mechanism of fluorescent probe were explained in detail by cross-corroboration of experiment and calculation. The possible sensing mechanism was explained at the molecular level with density functional theory (DFT). With the excitation of 350 nm, the emission peaks at 458 nm and 615 nm which corrsponded to MIL-53(Fe) and Eu centers, appeared enhancement and quenching respectively. To investigate the emission law, the density of states and partial density of states were used to explain the internal electron migration of the probe and the possible sensing mechanism. The results showed the electron transfer efficiency of MIL-53(Fe) was enhanced after Eu 3+ doping, which brought a remarkable improvement in response sensitivity. Meanwhile, the higher energy possessed by the excited state of Eu will lead to the capture of its own electrons by hydrogen peroxide, thus reducing the number of electrons returned to the ground states of Eu and eventually leading to the fluorescence quenching of 615 nm. We anticipate the proposed research is to be an emerging method in cholesterol determination and have further development in all walks of life.
研究领域:
生物化学
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材料科学
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分析化学
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计算化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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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
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电化学
·
能源存储
✓ 已验证
DOI
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2023
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IF 7.5
Liujie Xu,Yi Li,Mingzheng Liao,Qingbin Song,Chao Wang,Jiahong Weng,Ming Zhao,Ningbo Gao
Waste cooking oil (WCO) energy development offers an effective method for producing renewable fuels , enabling simultaneous resource recovery and pollution reduction. This study aims to develop a novel bimetallic Fe(Ni)-Ru/ZSM-5 catalyst toward H 2 -rich syngas production from WCO. The results show that Fe-Ru/ZSM-5 produced a higher maximum H 2 yield (84.05 μmol·g cat. −1 ·s −1 ) than did Ni-Ru/ZSM-5 (41.76 μmol·g cat. −1 ·s −1 ) when fed at a 50 L/min rate at an optimal temperature of 700 °C. Fe-Ru/ZSM-5 presented a more prolific microporous distribution, whose structure contributes to the diffusion of the short-chain hydrocarbon intermediate reactants to enhance hydrogen production . Fe(III) can help to improve the conversion ratio of benzene and the anti‑carbon deposition capability of the catalyst. The dealumination and oxidation decreases the stability of the catalyst and may lead to inactivation. Furthermore, this study discusses the mechanism of bimetallic-loaded catalysts combining noble metals with transition metals in WCO pyrolysis . The results point to effective new approaches to increase H 2 production through the catalytic pyrolysis of WCO.
研究领域:
化学工程
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环境科学
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能源技术
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催化
✓ 已验证
DOI
高影响因子
TETRAHEDRON
·
2024
·
IF 2.1
Zixu Li,Fei Wang,Kai Ma,Chao Fang,Qiang Jia,Changhu Chu
Aryl triflate is a type of facile and readily available compounds, which could be used as an alternative substrate for Suzuki cross coupling. In this manuscript, a novel ppm-Pd-Fe/C catalyst has been developed by reduction of palladium acetate and iron trichloride with aqueous hydrazine in situ and supported on activated charcoal. In combined with Sphos, and metal zinc as additives, this catalyst, with 300 ppm palladium loading, could be applied in the Suzuki cross coupling between aryl triflates with aryl neopentylglycolboronates.
研究领域:
有机化学
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催化
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材料科学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Ming-feng Sun,Ting Wang,Li-guang Wu,Yu-xing Wang
This study attempted to enhance the permeation and antifouling performance of polyvinylidene fluoride (PVDF) ultrafiltration membranes. Reverse microemulsion containing cobalt and iron (Co–Fe) bimetallic hydroxide nanoparticles was blended with the PVDF membranes to construct a novel PVDF hybrid membrane. The permeation performance, antifouling property, and long-term operational stability of the hybrid membranes were evaluated via ultrafiltration process of water flux and bovine serum albumin (BSA) rejection. Structural characterization showed that the protection endowed by reverse microemulsion made the hydroxide nanoparticles to distribute uniformly in the PVDF polymeric matrix. The introduction of well-distributed bimetallic hydroxide nanoparticles substantially improved the pore structures and hydrophilicity of the PVDF hybrid membranes, thereby enhancing their permeation performance and antifouling property. The optimal water flux of the PVDF hybrid membranes (MD-10) reached 328 L·m −2 ·h −1 and was 5.4-fold higher than that of neat PVDF. Moreover, the MD-10 membrane had a high a high BSA rejection rate (91.04%). After four cycles of successive fouling-cleaning processes, the water flux of the MD-10 membrane still exceeded 160 L·m −2 ·h −1 and was fourfold higher than that of neat PVDF. However, excessive amounts of the microemulsion could not be uniformly mixed with the PVDF membranes, thereby decreasing the permeation and antifouling performance of the PVDF hybrid membranes.
研究领域:
膜科学
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纳米技术
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材料科学
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环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 32
·期 8
·10734-10749
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IF 2.478
Kabir Fazal,Murtaza Adil,Saeed Azhar,Ghani Awais,Ali Anwar,Khan Saleh,Kaili Li,Qizhong Zhao,Kang Yao Kang,Yang Sen
Room temperature ferromagnetism with the doping of magnetic ions in the semiconducting host is the fundamental criterion for the potential use of spintronics material. In the present study, pure and (Fe, Tb) co-doped ZnO nanoparticles were well-prepared via the co-precipitation method, and corresponding microstructural, magnetic, and optical properties were investigated. The formation of Wurtzite hexagonal crystal structure of pure and doped ZnO was confirmed by X-ray diffraction (XRD) studies. No secondary phase was detected in all samples. Microstructural analysis reveals the spherical morphology of synthesized particles with the average size in the nanometer range. Fourier transforms infrared spectra show Tb–Zn–O stretching at 550 cm −1 . Optical absorption spectra show that the bandgap decreases and the absorption band slightly shift toward the visible region with increasing Tb doping, which may be due to the transfer of charge between the Tb ion 4f level and ZnO valance band. The photoluminescence (PL) spectrum exhibits a strong emission in the visible range, and PL emission intensity decreases with increasing Tb concentration and is anticipated to be due to the low recombination rate of electron–hole pairs. Most importantly, the room temperature ferromagnetism (RTFM) was observed in the doped ZnO nanoparticles, ascribed to the bound magnetic polaron (BMP) mechanism. The optical and magnetic outcome demonstrates that prepared (Fe, Tb) co-doped ZnO based dilute magnetic semiconducting (DMS) material are potential candidates for spintronics applications.
研究领域:
材料科学
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纳米技术
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自旋电子学
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固体物理
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2024
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IF 7.7
Xueyan Li,Lei Wang,Xin Zheng,Xiang Tu,Anhong Cai,Jing Deng
In this study, a UV-driven photocatalytic activation of peroxymonosulfate (PMS) system was constructed using bimetallic metal-organic frameworks to degrade pharmaceuticals and personal care products (PPCPs). Mn-MIL-53(Fe) was successfully synthesised by adjusting the doping ratio of Mn using solvothermal method. The removal of ibuprofen (IBP) by UV/Mn-MIL-53(Fe)/PMS process was as high as 79.7% in 30 min with a Mn doping ratio of 1.0 (molar ratio of Mn to Fe), and the reaction rate constant was 26.9% higher than undoped. Mn-MIL-53(Fe) had been systematically characterized in terms of its physical structure, microscopic morphology, surface functional groups and photoelectric properties. The mechanism investigation revealed that the cycling of Mn and Fe accelerated the rate of electron transfer in the system, which significantly increased the activation efficacy of PMS to generate more hydroxyl and sulfate radicals for IBP degradation. A total of 13 transformation products were detected during the degradation of IBP by the UV/Mn-MIL-53(Fe)/PMS process. Theoretical calculations were used to predict the sites on the IBP molecule that were vulnerable to attack, and four possible degradation pathways were deduced. The excellent stability and efficient catalytic properties of Mn-MIL-53(Fe) provided a promising solution to the problem of water treatment contaminated with PPCPs.
研究领域:
环境科学
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化学工程
·
材料科学
·
药学
✓ 已验证
DOI
高影响因子
CELLULOSE
·
2023
·Vol. 30
·期 15
·9607-9623
·
IF 5.7
Wang Zhile,Yu Dehai
The photocatalytic degradation of organic pollutants represents an efficacious, energy-conserving, and eco-friendly methodology. MIL-101 is a porous crystalline material composed of metal ions (or metal clusters) and organic linkers. As a prominent metal-organic framework material, MIL-101 exhibits remarkable thermal and chemical resilience, rendering it ideal for diverse applications encompassing gas storage, separation, and catalytic processes. However, its potency in the degradation of dye molecules is impeded by its innate hydrophobicity and predisposition to precipitate in aqueous solutions. In this study, MIL-101(Fe)/cellulose nanocrystal (CNC) hybrid nanoparticles (MCs) with high photocatalytic activity were prepared by in situ growth. Owing to their unique amphiphilicity and interfacial adsorption, the Pickering emulsions stabilised by MCs showed uniform particle size and stability. The MCs were uniformly adsorbed at the oil–water interface of the emulsion and dispersed in the water phase through a three-dimensional network with clusters. This facilitated complete contact of the MCs with pollutants, thereby significantly increasing the photocatalytic efficiency. The tuneable wettability of MIL-101(Fe) induced by CNCs considerably affected the stabilization and photocatalytic degradation performance. In the presence of 0.5 wt% CNCs, the MCs had a three-phase contact angle of 92°, resulting in the highest photocatalytic degradation rate and emulsion stability of the samples studied herein. An emulsion was produced with a constant emulsification index of 100% by using 0.4 wt% MCs and an oil-phase volume fraction of approximately 0.2. The MC-stabilised emulsion system exhibited high photocatalytic degradation efficiency for Rhodamine B. Moreover, the MCs could be recycled several times while ensuring a degradation efficiency within an acceptable range. Herein we introduce a new approach for improving and fabricating green, sustainable photocatalysts for the degradation of organic pollutants in aqueous systems.
研究领域:
环境科学
·
材料科学
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纳米技术
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催化
·
水处理
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 12
·期 5
·2994-3005
·
IF 11.9
Ting-Yu Shuai,Qi-Ni Zhan,Hui-Min Xu,Chen-Jin Huang,Zhi-Jie Zhang,Hong-Rui Zhu,Gao-Ren Li
The design of efficient, environment-friendly, stable, and low-cost oxygen evolution electrocatalysts is a technical difficulty in realizing the commercial application of water electrolysis. Herein, we developed a novel three-dimensional (3D) electrocatalyst to grow Ni3Se4/Fe(PO3)2 composites on nickel foam (NF) in a short time of 80 s by a simple electrodeposition method, which not only effectively prevents the agglomeration of Ni3Se4, but also reduces the size of Fe(PO3)2 particles from micron level to nanometer level, exposing more electroactive sites. Fe(PO3)2 with a low crystalline structure and crystalline Ni3Se4 can form a unique heterostructure to produce a strong electron coupling and synergistic effect for the oxygen evolution reaction (OER) in alkaline media, which effectively improves the intrinsic activity of Ni/FeOOH active sites. The Ni3Se4/Fe(PO3)2/NF composites as catalysts can achieve a low overpotential of 185 mV in alkaline media at a current density of 10 mA cm−2 and a small Tafel slope of 30.4 mV dec−1, exhibiting excellent OER catalytic activity and stability.
研究领域:
电化学
·
材料科学
·
催化
·
能源材料
✓ 已验证
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2021
·
IF 9.642
Zeyu Wang,Luyao Dai,Jiachao Yao,Tianjiao Guo,Dzmitry Hrynsphan,Savitskaya Tatsiana,Jun Chen
Aiming at the accumulation of NO 2 − -N and N 2 O during denitrification process, this work focused to improve the denitrification performance by Pd-Fe embedded multi-walled carbon nanotubes (MWCNTs). The main conclusions were as follows: 30 mg/L Pd-Fe/MWCNTs have shown an excellent promotion on denitrification (completely TN removal at 36 h). Meanwhile, enzyme activity results indicated that the generation of NO 2 − -N, NH 4 + -N by Pd-Fe/MWCNTs led the occur of short-cut denitrification by increasing 203.9% the nitrite reductase activity. Furthermore, electrochemical results and index correlation analysis confirmed that the electron exchange capacity (1.401 mmol eg −1 ) of Pd-Fe/MWCNTs was positively related to nitrite reductase activity, indicating its crucial role in electron transport activity (0.46 μg O 2 /(protein·min) at 24 h) during denitrification process by Pd-Fe/MWCNTs played a role of chemical reductant and redox mediator.
研究领域:
环境工程
·
生物技术
·
微生物学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Yixuan Zhang,Guoqiang Liu,Chang Su,Guangyin Liu,Hongda Sun,Danlei Qiao,Lei Wen
This work focuses on the improvement on the electrochemical performances of Fe–Mn based oxides as cathode for sodium ion batteries by doping Cu and F elements. The synthesized doped-compounds exhibit extremely excellent electrochemical performance. For instance, it's initial discharge capacity can reach 195.6 mAh g −1 at a current density of 10 mA g −1 . Meanwhile, after 200 cycles at 200 mA g −1 , it still remains a capacity of 124.1 mAh g −1 , 87.8% of the initial capacity of 141.3 mAh g −1 . More significantly, it can deliver a high capacity of 106.4 mAh g −1 at a high current density of 1000 mA g −1 . It is found that F/Cu co-substitution obviously improve the discharge capacity and cycle stability of Fe–Mn based oxide especially at higher current densities. Doping Cu and F elements has influence on the structure and morphology of the material, which results in the improvement of charge-discharge characteristics.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Xiao Tan,Yinjie Zhang,Meng Liu,Jinman Cao,Guilan Duan,Jun Cui,Aijun Lin
Cr(VI) contamination in aquatic systems has been a challenge for environmental science researchers. To environmental-friendly, stable, and efficiently remove Cr (VI), a novel layered double hydroxide was prepared through the ultrasonic-assisted co-precipitation method. The ultrasonic-assisted step prevented the Fe 2+ oxidation, improved the morphology and performance, and finally, the adsorption-coupled reduction capacity and stability were enhanced. By adding U–Fe/Al-LDH (1.0 g/L) for Cr(VI) (100 mg/L), the removal rate reached 82.24%. The removal data were well fitted by the pseudo-second-order kinetic and Langmuir isotherm model. Using U–Fe/Al-LDH can be performed over a wide pH range (2–10), with a theoretical maximum removal capacity of 118.65 mg/g. The Cr(VI) with high toxicity was adsorbed and reduced to low-toxicity Cr(III). In the final phase, stable Cr(III) complex precipitates were generated. After 30 days, the dynamic leaching amounts of total Cr in used U–Fe/Al-LDH-2 were 0.1052 mg/L. Combined with the results of the influence experiment of coexisting anions and oxidants and the SO 4 2− release experiment, the stability of the removal effect and the safety of U–Fe/Al-LDH were proved. In conclusion, U–Fe/Al-LDH-2 is a promising remediation agent and a feasible Cr(VI) removal method for the practical remediation.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）