SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Maoxiang Liu,Shupeng Zhang,Juanjuan Gao,Yueyue Qian,Haiou Song,Shuang Wang,Kangjun Xie,Wei Jiang,Aimin Li
To develop simple and sensitive electrocatalytic technique for toxic nitrite determination is significantly important. Electrochemical nitrite sensor has attracted tremendous attention owing to its high sensitivity, selectivity and short response time. Here, we report the highly sensitive nitrite sensor based on poly(diallyldimethylammonium chloride) (PDDA)-coated Fe 1.833 (OH) 0.5 O 2.5 -decorated N-doped graphene (NG) ternary hierarchical nanocomposite (Fe 1.833 (OH) 0.5 O 2.5 /NG@PDDA). Differing from complicated synthetic routes for the reported ternary systems, the Fe 1.833 (OH) 0.5 O 2.5 /NG@PDDA composite can be effectively constructed by a facile one-pot hydrothermal method . The electrochemical performance of Fe 1.833 (OH) 0.5 O 2.5 /NG@PDDA composite film modified glassy carbon electrode was investigated by cyclic voltammetry and amperometric techniques. The experimental results indicate that synergistic effect of Fe 1.833 (OH) 0.5 O 2.5 as catalytic center, NG as conductive platform and PDDA as nitrite adsorbent can significantly enhance the electrochemical response. The fabricated sensor exhibits the excellent analytical performance for nitrite detection linearly over two different concentration ranges, which are from 0.1 to 347 μM and from 347 to 1275 μM with a detection limit of 0.027 μM (S/N = 3). The value is very much comparable to the recent literature ones. Moreover, the proposed electrochemical sensor also shows good stability, reproductivity and excellent anti-interference ability against metal ions and electroactive species, and exhibits satisfactory recovery for detecting nitrite in drinking water.
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DOI
高影响因子
IONICS
·
2021
·Vol. 27
·期 10
·4439-4448
·
IF 2.817
Huang Xiangjin,Li Jianwen,Xie Chunsheng,Zhang Huasheng,Wei Shoulian,Lai Wenfeng,Xian Shaoling,Huang Sicong
Herein, a nanocomposite comprising polyvinyl pyrrolidone (PVP) and cobalt(II) hydroxide (Co(OH) 2 ) nanoparticles (PVP–Co(OH) 2 ) was synthesized via a hydrothermal method and used for detection of Cu(II) ions. Using PVP grafted nanosized Co(OH) 2 as a surfactant could decrease the aggregation and reduce the particle size. The conducted morphology investigations showed that PVP–Co(OH) 2 nanocomposite was composed of small spherical particles with a diameter of 40–80 nm that could accelerate mass diffusion and favor the deposition-stripping process of Cu(II) ions. High catalytic activity of Co(OH) 2 and good affinity of PVP to Cu(II) ions synergistically enhances sensing performance of the PVP–Co(OH) 2 nanocomposite-modified electrode than Co(OH) 2 - and PVP-modified electrodes. A linear response was obtained for Cu(II) ion concentration over a range of 1.0–90.0 μg/L, with a detection limit of 0.26 μg/L (S/N = 3). The proposed electrode exhibited good performance in terms of selectivity, stability, and reproducibility. It was also employed to detect Cu(II) ions in water and food samples, and the results were in good agreement with those obtained by graphite furnace atomic absorption spectrometry.
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高影响因子
iScience
·
2021
·
IF 5.458
Kun Yu,Jiang Deng,Yongjie Shen,Aiyong Wang,Liyi Shi,Dengsong Zhang
Exploring highly efficient and low-cost supported Pt catalysts is attractive for the application of volatile organic compounds (VOCs) combustion. Herein, efficient catalytic combustion of toluene at low temperature over Pt/γ-Al 2 O 3 catalysts has been demonstrated by tailoring active Pt species spatially. Pt/γ-Al 2 O 3 catalyst with low Pt-content (0.26 wt%) containing both interfacial Pt-Al(OH) x and surficial metallic Pt (Pt 0 ) species exhibited super activity and water-resistant stability for toluene oxidation. The strong metal-support interaction located at the Al-OH-Pt interfaces elongated the Pt-O bond and contributed to the oxidation of toluene. Meanwhile, the OH group at the Al-OH-Pt interfaces had the strongest adsorption and activation capability for toluene and the derived intermediate species were subsequently oxidized by oxygen species activated by surficial Pt 0 to yield carbon dioxide and water. This work initiated an inspiring sight to the design of active Pt species for the VOCs combustion.
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PubMed
高影响因子
Chemical Engineering and Processing-Process Intensification
·
2020
·
IF 3.731
Yilin Deng,Wei Lai,Xiaoyang He,Li Xu,Bin Xu
The efficient electrochemical hydrogen evolution reaction in alkaline media through the use of earth-abundant catalysts has received significant attention, as it is a crucial means for sustainable H 2 production. Here, we present a facile synthesis approach for Ni(OH) 2 /MoS x (MoS x : amorphous molybdenum sulfide) catalyst on oxidized carbon fiber support. Carbon fibers are first oxidized by a hydrothermal treatment in a concentrated HNO 3 solution, while Ni(OH) 2 and MoS x films are consecutively deposited onto the substrate through simple electro-deposition methods from their plating solutions. Benefiting from the hydrophilicity of the oxidized carbon fiber, the abundant electrochemically reactive sites and the synergistic effect between Ni(OH) 2 and MoS x , this hybrid catalyst shows a low HER onset potential of 80 mV at 1 mA/cm 2 , an overpotential of 180 mV at 10 mA/cm 2 and a remarkable stability of at least 35 working hours at a H 2 -evolving current density of 10 mA/cm 2 without any obvious overpotential changes.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2017
·
IF 6.035
Jinqiang Cui,Jiuqing Liu,Chunfeng He,Jie Li,Xiufeng Wu
As an important component of the lithium ion batteries, the separator has attracted much attention by researchers. In this paper, a polymer electrolyte separator based on the blended polymer of polyvinylidene fluoride and cellulose acetate was obtained via non-solvent induced phase separation (NIPS), meanwhile, the Al(OH) 3 particles was used as the addition doping into the blended polymer matrix. The structure, for example, pore size, porosity and the crystallization of the resulting separators were characterized. The thermal stability, ionic conductivity and electrochemical performance were also investigated. The results indicated that the PVDF-CA/Al(OH) 3 separator presented high porosity (68.6%), high electrolyte uptake (403.9%), especially superior thermal stability (thermal shrinkage ratio was 4.6% at 160 °C) and excellent ionic conductivity (2.85 mS cm −1 ). In addition, the rate capability (128.28 mA h g −1 at 8 C) and cycle performance (151.97 mA h g −1 after 100 cycles at 1 C) were also superior to those of the commercial polypropylene separator, demonstrating that the PVDF-CA/Al(OH) 3 separator can be a promising separator for the high-safety and high-rate dischargeable lithium ion battery.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Qi Chai,Bo Yang,XiuMin Li,Fengfeng Gao,Xiaogang Hao
A nickel hydroxide/carbon black/polyvinylidene fluoride (Ni(OH) 2 /CB/PVDF) film was coated on a graphite plate substrate and used for the selective and efficient extraction of W(VI) using self-driven film adsorption. The excellent self-driven adsorption performance of Ni(OH) 2 /CB/PVDF film for W(VI) was demonstrated by the comparison of the experimental performance of film adsorption and electrochemically switched ion exchange (ESIX) process. In the Ni(OH) 2 /CB/PVDF film, the adsorption of W(VI) by Ni(OH) 2 was achieved through the ligand exchange reaction with W(VI) and abundant hydroxyl groups, which ensured the self-driven performance. The adsorption capacity of the self-driven Ni(OH) 2 /CB/PVDF film for W(VI) under neutral conditions could reach up to 37.53 mg·g −1 after 12 h. Moreover, the adsorption kinetics and adsorption thermodynamics showed that the adsorption of W(VI) on Ni(OH) 2 /CB/PVDF films was more in line with the pseudo-second-order kinetic model, and the adsorption was heat-absorbing and spontaneous. After seven cycles of adsorption/desorption, the adsorption capacity of W(VI) by Ni(OH) 2 /CB/PVDF film could reach 79.37 % of its initial value, which showed good adsorption/desorption cycle performance. Moreover, Ni(OH) 2 /CB/PVDF films showed high selectivity for W(VI) when WO 4 2− coexisted with Cl − , NO 3 – , and SO 4 2− , respectively. This study confirmed that the self-driven Ni(OH) 2 /CB/PVDF film had efficient and stable adsorption performance for W(VI), which can be regarded as a promising method for the selective adsorption of W(VI) from aqueous solution.
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高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yongfang Jia,Juan Gao,Feng Yang,Yangmin Diao,Qijun Liu,Yong Zhang,Hongliang Sun,Min Pan,Mei Huang,Min Xu,Xuru Duan,Yong Zhao
Despite the excellent performance of Nb3O7(OH) in dye-sensitized solar cells and catalysis, its charge separation, transport, and structural properties remain poorly understood. Herein, the Nb3O7(OH) nanorods were prepared, and their structural characteristics, optoelectronic properties, and carrier mobility were also analyzed and investigated through a series of complex characterizations. Theoretical prediction suggested that the exciton binding energy of Nb3O7(OH) could be as high as 100.49 meV. The temperature-dependent photoluminescence (PL) of Nb3O7(OH) nanorods revealed two activation energies, and a higher proportion of long-lived components observed in the photoluminescence decay indicated effective electron trapping. That is, two energy states were present, hindering photogenerated charge recombination and promoting photocatalytic action. Current–voltage characteristics of the Nb3O7(OH) nanorod film were analyzed, revealing an ultrahigh carrier mobility of ∼310 cm2/V·s, ensuring fast and efficient electron transfer. Furthermore, Nb3O7(OH) nanorods were employed to reduce CO2, resulting in the effective production of CO and CH4. Overall, considering the presence of hydroxyl pairs on the surface of Nb3O7(OH), which facilitate the formation of the frustrated Lewis acid–base pairs and the activation of CO2, together with its effective electron trapping and charge transport, give Nb3O7(OH) nanorods a promising potential for CO2 reduction.
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高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 18
·7049-7057
·
IF 8.067
Yingyuan Chen,Feilong Liu,Ziwang Zhang,Junyu Hong,Maxim S. Molokeev,Ivan A. Bobrikov,Jianxin Shi,Jianbang Zhou,Mingmei Wu
Red-light-emitting materials, as pivotal components of warm white light-emitting diodes (WLEDs), have drawn increasing public focus. Among these, Mn4+-doped red light-emitting fluorides have drawn considerable attention when combined with an InGaN chip; however, they suffer from poor water stability under humid conditions. In this work, a novel fluoride red phosphor, Cs30(Nb2O2F9)9(OH)3·H2O:xMn4+ (CNOFM), with good water resistance was synthesized for the first time using a facile co-precipitation method at ambient temperature. Experiments were implemented for the precise analysis of its crystal structure, optical properties, micro-morphology, thermal behavior, and waterproof properties. 6.66% Mn4+-doped CNOFM maintained a stable crystal structure and possessed strong PL intensity located at 633 nm with high color purity of 96%. CNOFM showed better thermal and waterproof stability compared with the commercial K2SiF6:Mn4+ red phosphor. Without any surface modifications, the PL intensity remained at about 83% of the initial value after immersion in water for 60 min, and the mechanism was investigated. Finally, a warm WLED with a CRI of 92.3 and CCT of 3271 K was fabricated using the CNOFM red phosphor.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 35
·15281-15286
·
IF 2.7
Tao Ouyang,Xu Chen,Shanshan Chen,Yanqiang Li,Xiaoying Shang,Zhiyong Bai,Ningtao Jiang,Zhishuo Yan,Junhua Luo,Sangen Zhao
Finding a deep-ultraviolet (deep-UV, λ < 200 nm) nonlinear optical (NLO) crystal is vital to a number of advanced optical technologies, yet it remains a great challenge. Herein, we report a deep-UV NLO crystal, K2B3O3F4(OH) (KBOFH), composed of π-conjugated confined groups. It exhibits a relatively large birefringence of 0.054@550 nm and a wide transparency window with an absorption edge below 200 nm. Theoretical calculations reveal that the observed optical properties of KBOFH originate from the confined π-conjugated [B3O3F4(OH)] unit, in which the π-conjugated interactions are decoupled by the tetrahedral non-π-conjugated [BO2F2] unit. This work provides an opportunity to design deep-UV NLO crystals containing π-conjugated confined groups.
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高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Yuhang Xu,Wei Li,Sisi Qin,Kai Su,Junmin Chen,Shengli Zhang
ABSTRACT In this study, La(OH) 3 -loaded Juncus effusus (La-JE) with a three-dimensional structure was prepared via an in-situ precipitation and then wrapped in a cellulose membrane. The La-JE not only avoided the leakage of La(OH) 3 but also was separated from solution easily. The optimal pH for phosphate removal by the La-JE was 6. The removal rate of phosphate was positively correlated with adsorption time, La-JE dosage and reaction temperature, and negatively correlated with phosphate concentration. The adsorption process conformed to pseudo-second-order kinetic model and was better fit by Freundlich model. At 25°C, the maximum adsorption capacity of the La-JE was 22.75 mg·P/g. The influence of SO 4 2– , Cl – , NO 3 – , NH 4 + , HCO 3 – and CO 3 2– on phosphate removal was negligible, suggesting that the La-JE had good anti-interference ability. Mechanism analysis showed that the removal process of phosphate was related to both ligand exchange and surface precipitation. The application in real water environment exhibited that the La-JE had good potential for advanced dephosphorization of sewage treatment plant and natural waterbody remediation.
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高影响因子
RARE METALS
·
2023
·Vol. 43
·期 3
·1263-1274
·
IF 8.8
Guo Yue,Qin Lin-Jun,Xu Jing,Jiang Xiao-Ping,Yue Xiao-Yu,Hou Yi,Shi Hao,Wang Li-Xi,Zhang Qi-Tu
Optical temperature sensing based on the fluorescence intensity ratio (FIR) of red emission for lanthanide ions holds significant relevance in non-contact temperature measurement for biological application. In this study, the perovskite-structured KZnF 3 is utilized as a host material for Er 3+ to achieve a high-purity upconversion (UC) red emission. The observed Stark splitting of the red emission peak provides evidence of the energy level splitting of Er 3+ . Group theory is employed to decompose the spectral branching of Er 3+ under the point group symmetry of KZnF 3 , allowing for the derivation of Stark splitting energy levels induced by the crystal field effect. The optical temperature-sensing behavior of the red UC luminescence was investigated, specifically examining the FIR of the splitting sub-peaks, which exhibited an exponential relationship with temperature. The KZnF 3 : Yb 3+ , Er 3+ demonstrated a relative sensitivity ( S r ) of 0.00182%·K −1 at 298 K, highlighting its excellent response to temperature. Ex vivo bio-thermometry experiments conducted on chicken breast validated the material's ability to penetrate biological tissues and showed its significant sensitivity of the FIR to temperature. These results establish KZnF 3 :Yb 3+ , Er 3+ as a promising material for optical thermometry in various biological applications. Graphic abstract
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高影响因子
DALTON TRANSACTIONS
·
2017
·Vol. 46
·期 32
·10620-10629
·
IF 4.029
Songsong Li,Dongsheng Dai,Lei Ge,Yangqin Gao,Changcun Han,Nan Xiao
Novel layer-like Ni(OH)2 co-catalyst-decorated ZnIn2S4 microsphere photocatalysts were synthesized for the first time via a facile in situ deposition method to boost the photocatalytic H2-production performance. The physical and optical properties of the as-prepared Ni(OH)2–ZnIn2S4 composite samples were characterized via X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-vis diffusion reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), and surface photovoltage spectroscopy (SPV). The results indicate that the photocatalytic H2 evolution activity of the ZnIn2S4 microspheres under visible light irradiation significantly enhances by introducing inexpensive Ni(OH)2 as a co-catalyst. The 5 mol% Ni(OH)2–ZnIn2S4 sample shows the highest H2-production rate of 8.35 mmol g−1 h−1, which is 18 times higher than that of pure ZnIn2S4. Moreover, photocatalytic activity of the Ni(OH)2–ZnIn2S4 sample remains stable even after 4 cycling photocatalytic experiments. In addition, a possible mechanism on the enhanced photocatalytic activity was proposed and verified by surface photovoltage spectroscopy.
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高影响因子
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