LUMINESCENCE
·
2023
·Vol. 39
·期 2
·e4632
·
IF 2.9
Yinhui Yi,Jieling Hou,Xiaoya Bi,Lijun Luo,Libo Li,Tianyan You
It is of great significance to develop an effective method for methyl parathion (MP) detection. Herein, a novel nitrogen-doped titanium carbide quantum dots (N-Ti 3 C 2 QDs) was prepared and used to construct a simple and sensitive fluorescence sensing platform of MP by making use of inner filter effect (IFE). The prepared N-Ti 3 C 2 QDs can exhibit strong blue fluorescence at 434 nm. Meanwhile, MP could hydrolyze to produce p -nitrophenol (p-NP) under alkaline conditions, which showed a characteristic ultraviolet-visible (UV-visible) absorption peak at 405 nm, resulting in the fluorescence of N-Ti 3 C 2 QDs is effectively quenched by p-NP. In addition, the investigation of time-resolved fluorescence decays indicated that the corresponding quenching mechanism of p-NP on N-Ti 3 C 2 QDs is due to the IFE. After optimizing the conditions, the as-developed fluorescence sensing platform displayed wide detection range (0.1–30 μg mL −1 ) and low detection limit (0.036 μg mL −1 ) for MP, and it was also successfully applied for MP analysis in real water samples, thus it is expected that this simple, sensitive and enzyme-free sensing platform shows great applications.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Xiancai Jiang,Siqi Wei,Jinquan Wang
Hydrogel electrolytes are ideal for flexible wearable electronic devices because of their high ionic conductivity, flexibility, and biocompatibility. However, some problems, such as poor mechanical properties, low conductivity, and lack of adhesivity, are encountered in the process of hydrogel preparation and application, which restrict the further development of hydrogel electrolytes. In this study, PVA was used as the first network, and P(AM-co-AMPS) as the second network to prepare a double-network hydrogel electrolyte. Laponite and Na2SO4 were introduced into the hydrogel during hydrogel formation as the nanofiller and salt with the salting-out effect to enhance its mechanical properties. The hydrogel electrolyte with high toughness (1663 kJ·m–3), adhesivity (77 kPa), and ionic conductivity (1.7 S·m–1) was obtained. In addition, the hydrogel electrolyte also has excellent antifatigue performance. In the 10 consecutive tensile cycles, the tensile strength does not decay. Due to the high adhesivity of the hydrogel electrolyte, a symmetrical all-solid-state supercapacitor was assembled with a tight interface between the hydrogel electrolyte and the AC/CNT composite electrode. The supercapacitor has a high specific capacitance of 186.1 mF·cm–2 at the current density of 1 mA·cm–2. In addition, the capacitor has good flexibility and can withstand bending at various angles. The hydrogel electrolyte also has excellent strain sensing performance, with an ultrafast tensile response time (0.17 s) and high sensitivity factor (GF = 10.01). Finally, the self-powered sensor system composed of a supercapacitor as the power supply device and hydrogel electrolyte as the sensing part was obtained and applied to human motion monitoring, which provides a potential application in the integrated flexible electronic system.
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Materials Horizons
·
2023
·Vol. 11
·期 1
·271-282
·
IF 13.3
Peiyuan Zuo,Jinpeng Li,Donglin Chen,Lingzhi Nie,Liang Gao,Jingyu Lin,Qixin Zhuang
The all-organic high-temperature polymer dielectrics with promising scale-up potential have witnessed much progress in the energy storage area, etc. However, the electron suppression trap mechanisms behind many all-organic dielectrics are still unclear, especially for high temperature resistant poly(p-phenylene benzobisoxazole) (PBO) polymers. To resolve this tough issue, we herein innovatively prepared PBO-based all-organic thin films containing sulfone-based polyimide (P(DSDA-ODA)) functioning as an electron trap phase using a facile and scalable co-curing method. The great linear dielectric properties of the prepared P(DSDA-ODA)/PBO films hold high dielectric thermal stability over the temperature range from 25 °C to 200 °C. The 60 wt% P(DSDA-ODA) systems yield the lowest leakage current (3.8 × 10−8 A cm−2). The tight structure and reduced leakage current enable an enhanced breakdown strength of 60 wt% P(DSDA-ODA)/PBO (470 kV mm−1), which is 1.7 times that of pure PBO. Meanwhile, it can reach 4.16 J cm−3 of energy density, which is 257% higher than that for pure PBO thin films while concurrently maintaining a long stable charge–discharge cycle (at least 5000 times) and high charge–discharge efficiency at 85.10%. Moreover, P(DSDA-ODA)/PBO still exhibits excellent energy storage performance at high temperature compared to PBO. This innovative strategy is further verified by replacing P(DSDA-ODA) with P(6FDA-ODA), and therefore lays a solid foundation for more investigation on scalable all-organic dielectrics.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Jiuli Chang,Fengfeng Song,Fang Xu,Dapeng Wu,Yan Hou,Kai Jiang,Yuming Guo,Zhiyong Gao
Charge redistribution across heterointerfaces is an important tactic to enhance the catalytic activities and bifunctionality of hybrid catalysts, especially for green hydrogen production from water electrolysis and harmless electrocatalytic valorization of organics. Herein, a self-supported p-n junction catalytic electrode was constructed by tandem electrodeposition of nickel cobalt phosphide (NiCoP) and nickel iron layered double hydroxide (NiFe LDH) onto Ni foam (NF) substrate, denoted as NiCoP@NiFe LDH/NF, to enhance the electrocatalytic capabilities for water electrolysis and hydrogenation of an organic, para -nitrophenol (4-NP). Benefitting from the charge redistribution across the p-n junction, high electrocatalytic efficiencies for oxygen evolution reaction (OER, overpotential of 388 mV at 100 mA cm −2 ) and hydrogen evolution reaction (HER, overpotential of 132 mV at 10 mA cm −2 ) could be achieved concurrently by the NiCoP@NiFe LDH/NF electrode, and both overpotentials were located within the mainstream levels in this domain. The bifunctional catalytic features enabled a full water electrolysis response of 10 mA cm −2 at 1.61 V. In addition, the p-n junction electrode catalyzed the hydrogenation of 4-NP at a conversion of 100%, para -aminophenol (4-AP) selectivity of 90% and faradaic efficiency (FE) of 88% at −0.18 V. The current work offers a feasible strategy for fulfilling electrochemical H 2 production and hydrogenation valorization of 4-NP pollutant by constructing a self-supported p-n junction catalytic electrode.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Ying-Ming Li,Wen-Juan Hu,Shuang-Lin Hu,Yi-Ran Li,De-Yi Wang
Organic aerogels take the advantages of low density, regulatable flame retardancy, excellent thermal insulation and high mechanical property, which showing an innovative strategy to endow the rigid polyurethane foam with enhanced the flame retardance, mechanical property and thermal insulation performance. Hence, in this work, an innovative strategy was developed to design organic aerogels via the polyvinyl alcohol (PVA) and adenosine triphosphate endowing the RPUF with simultaneously super thermal insulation, enhanced compressive strength , flame retardancy and smoke suppression. The compressive strength of RPUF/PVA-ATP 7 composite was 338 kPa, which was 74.2% higher than that of RPUF. It should be noted that the thermal conductivity of RPUF/PVA-ATP 7 was only 0.020 W/(m·K), which being lower than that of air and showing the characteristic of supper insulating materials. For the RPUF/PVA-ATP 5 and RPUF/PVA-ATP 7 composites, both passed the UL-94V-0 rating with a LOI of 30.0% and 36.5%. Meanwhile, the peak heat release rate (PHRR) and the peak of CO production (PCOP) of RPUF/PVA-ATP 7 composites effectively reduced by 40.7% and 61.6% respectively comparing to that of RPUF. Moreover, it was concluded that the condensed phase mechanism dominated for the RPUF/PVA-ATP 7 composites.
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Frontiers in Pharmacology
·
2021
·
IF 5.811
An Jing,Cheng Lijun,Yang Liping,Song Nali,Zhang Ju,Ma Kejian,Ma Ji
Nonalcoholic fatty liver disease (NAFLD) is the most common chronic liver disease, and it has gradually become the main disease burden in the world. However, the pathogenesis of NAFLD is complex, involving such things as dyslipidemia, oxidative stress, inflammation, etc. This brings to the table a significant challenge for drug development, and there is still no drug approved by the FDA on the market to treat the disease. GAS and HBA are active ingredients of the orchidaceae plant gastrodia elata and have exhibit effects in ameliorating nervous system diseases caused by oxidative stress. HBA is a metabolite of GAS that could perform lipid regulation and improve oxidative stress on HCD-induced NAFLD larval zebrafish, as reported by previous studies; we therefore explored the role of HBA in lipid regulation and oxidative stress on HCD-induced NAFLD larval zebrafish in vivo and FFA-induced BRL-3A hepatocyte in vitro. The gene expression of lipogenesis, inflammation, and oxidative stress were measured to investigate the underlying mechanism of HBA, and the potential protein target of HBA was explored by immunofluorescence. Altogether, our data highlight the role of HBA in improving NAFLD by use of its lipid-lowering and anti-oxidative properties via the Nrf2/HO-1 signaling pathway, providing a potential therapeutic compound for NAFLD treatment.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2021
·
IF 2.694
Xiaomin Qiu,Bingjie Huo,Qi Wang,Jingwei Yang,Zhaoyou Zhu,Yinglong Wang,Jun Gao
In this work, the effects of N-methyl pyrrolidone, N,N-dimethylformamide, cyclohexanol, butyl butyrate, and N-formylmorpholine on the separation efficiency of a p-xylene and 1-pentanol azeotropic system are investigated, and the best solvent is selected from these solvents. The vapor–liquid equilibrium data of binary systems of 1-pentanol + butyl butyrate, 1-pentanol + N-formylmorpholine, and p-xylene + butyl butyrate are measured using a modified Rose-type circulating still under 101.3 kPa. In order to check the thermodynamic consistency of the experimental vapor–liquid equilibrium data, the Herington and Van Ness methods are used. In addition, the nonrandom two-liquid, universal quasichemical, and Wilson models are used to correlate the experimental data of binary systems, and the interaction parameters of binary systems are obtained.
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DYES AND PIGMENTS
·
2021
·
IF 4.889
Wenbo Bai,Guoxu Qin,Jing Wang,Lei Li,Yonghong Ni
It has drawn extensive research interest to integrate luminescent ligands into metal-organic frameworks as luminescent materials due to striking luminescent properties. In this work, a Co-MOF with weak fluorescence emission , [Co(OBA)(2,2′-BPY)], was synthesized by a mixed solvothermal route with Co(NO 3 ) 2 as the Co 2+ ion source, 4,4′-Oxybis(benzoic acid) (OBA) and 2,2′-Bipyridyl (2,2′-BPY) as the ligands. Its fluorescence was obviously enhanced through integrating a small amount of luminescent ligands: 2-aminoterephthalic acid. Interestingly, the above enhanced fluorescence could be selectively quenched by the organophosphorus pesticides with p-nitrophenyl group such as p-nitrophenyl phosphate (PNPP) and bis(p-nitrophenyl) phosphate (BNPP) in water systems. As a case, the detection limit towards PNPP was up to 352 nM (0.07 mg kg −1 ), which is far lower than the standards for similar pesticide residues in fruits in China (0.1–0.6 mg kg −1 ) [ 1 ]. At the same time, the above phenomenon of the fluorescence quenching was not interfered from some other pesticides, metallic ions, amino acids and aromatic nitrocompounds, implying the present fluorescent material has potential application as a highly selective probe for detecting PNPP pesticide residues in food and domestic water. Furthermore, a possible quenching mechanism was discussed.
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Sustainable Energy & Fuels
·
2021
·Vol. 5
·期 9
·2477-2485
·
IF 6.367
Di Li,Zengyong Li,Jiaojiao Ma,Xinwen Peng,Chuanfu Liu
Developing efficient active transition metal phosphide (TMP) bifunctional electrocatalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) for alleviating the future energy crisis is crucial and challenging. Herein, we developed a facile self-assembly strategy for the one-step fabrication of core–shell Co2P nanoparticles encapsulated in nitrogen and phosphorus codoped porous carbon (Co2P@NPPC) via in situ carbonization and phosphorization. Due to the collaborative effect between NPPC and Co2P, the obtained Co2P@NPPC hybrid revealed robust electrocatalytic performance toward the HER and OER. Impressively, it exhibited a lower overpotential of 147 mV for HER and 316 mV for OER to reach the current density of 10 mA cm−2. Remarkably, it only required a low cell voltage of 1.65 V to reach the current density of 10 mA cm−2, with long-time reliable stability. Density functional theory (DFT) calculations suggest that the introduction of phosphorus into cobalt can weaken the H-adsorption free energy and increase the electronic states of Co2P.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Bowen Lu,Yanhui Wang,Wei Li,Shiwei Song,Pengfei Tian,Rushuo Li,Xueqing Tian,Xiangyu Liu,Jianbing Zang
The development of self-supporting electrodes that exhibited both high efficiency and good durability remained a challenge in the field of hydrogen energy utilisation. Here, we designed a self-supporting 3D hierarchical porous electrode by filling carbon nanotubes (CNTs) loaded with Ni–P alloy into the framework of nickel foam (NF). Firstly, CNTs were decorated with a catalytically active Ni–P alloy via electroless plating (Ni–P@CNTs). Then, the Ni–P@CNTs were filled and anchored onto the framework of NF via electroplating to synthesise a self-supporting electrode (Ni–P@CNTs/NF). The Ni–P@CNTs/NF exhibited an excellent catalytic performance toward the hydrogen evolution reaction (HER) in 1 M KOH electrolyte, with an overpotential of 53 mV at 10 mA cm −2 , a small Tafel slope of 101.56 mV dec −1 and excellent long-term durability. This facile and effective strategy might provide a new path to the design of self-supporting electrodes with enhanced HER catalytic.
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Surfaces and Interfaces
·
2021
·
IF 4.837
Xiaoming Fan,Yinxue Ma,Akang Sun,Xiao Zhang,Lin Tang,Jinxue Guo
The rational design of heterogeneous catalyst can be favored by synergistic interface for promising water electrolysis performance. Herein, the heterogeneous catalyst of NiFe 2 O 4 /Fe 3 (PO 4 ) 2 -PNC is prepared from NiFe LDH deposited phytic acid incorporated polyaniline nanofibers (PA-PANI) in situ grown on carbon cloth. The hybrid NiFe 2 O 4 /Fe 3 (PO 4 ) 2 nanoparticles acquire modulated OER mechanism due to the promoted proton transfer of phosphate group. The nanoparticles decorated tightly on PNC nanofibers assure high exposure of active sites and fast charge exchange. With the aid of above benefits, the NiFe 2 O 4 /Fe 3 (PO 4 ) 2 -PNC@CC exhibits good OER activities in neutral and alkaline medias, with low overpotentials of 325 mV and 275 mV at current density of 10 mA cm −2 , respectively, showing great potential as pH-tolerant OER catalyst for water splitting.
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Journal of Materials Research and Technology-JMR&T
·
2020
·
IF 5.289
Yufei Liu,Siyuan Jiang,Wei Yan,Jun Qin,Min He,Shuhao Qin,Jie Yu
In order to expand its application range in electronics and membrane industries, this paper aimed to develop polyamide 6 (PA6)/P ( N -(4-carboxyphenyl) maleimide-alt-triallyl isocyanurate) (PCT) composites with heat-resisting, thermally conductive and anti-moisture, by employing PCT as a reactive reinforcement material and applying irradiation for solid-state interfacial reaction (SSIR) between PCT and PA6. According to the results, the SSIR occurred between PA6 and PCT. Compared with non-SSIR PA6, the PA6/PCT composite with SSIR showed the highest heat resistance, thermal conductivity and anti-moisture absorption and its relative crystallinity ( X c ), glass transition temperature ( T g ), and heat deflection temperature ( HDT ), thermal conductivity and anti-moisture absorption were improved by 61.4, 24.0, 83.9, 18.5 and 40.2%, respectively. This is because that the chemical bond between the PCT surface and the PA6 matrix is formed by SSIR, which provides a theoretical basis either for the development of PA6 or other semi-crystalline polymers.
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