SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Xu Tian,Lijia Yao,Xiuxiu Cui,Rongjun Zhao,Xuechun Xiao,Yude Wang
Fast and effective detection of harmful gases is crucial criterion for the current development of gas sensors. In this paper, a novel n-butanol gas sensor using Al-doped CdIn 2 O 4 nanofibers (ACO NFs) is synthesized by an electrospinning method . The different morphologies of the as-prepared ACO NFs are controlled by doping different Al contents . Systematic characterizations demonstrate that the doping of Al to CdIn 2 O 4 NFs would enhance the reaction activities between the gas and sensing materials, such as generating large amounts of adsorbed oxygen and improving the specific surface area of sensing materials. The results show that the detection limit of all prepared sensors for n-butanol is sub-ppm, and less than 250 ppb. The optimal Al-doped CdIn 2 O 4 (5.0% Al/Cd molar ratio) based gas sensor results in 3.32-fold enhancement in gas response to 200 ppm n-butanol at an operating temperature of 300 °C and exhibits excellent long-term stability compared with the pure CdIn 2 O 4 . Hence, ACO NFs can be regarded as a promising sensing material for low-concentration n-butanol gas detecting. Also, the mechanisms for improving the sensing performance of ACO NFs based gas sensor are proposed.
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DOI
高影响因子
Nanoscale
·
2012
·Vol. 5
·期 4
·1552-1556
·
IF 5.914
Lihua Zhi,Jian Liu,Yuan Wang,Wei Zhang,Baodui Wang,Zhuguo Xu,Zhengyin Yang,Xing Huo,Guangming Li
Fe3O4 nanoparticles (NPs) decorated with rhodamine 6G Schiff base, which exhibit high selectivity and sensitivity toward Al3+ over other common metal ions in aqueous media under a physiological pH window via a 1 : 1 binding mode, have been synthesized and characterized. The resulting conjugate 1c renders the rhodamine 6G Schiff base unit more water soluble, and the detection limit reaches 0.3 ppb in water. Moreover, 1c can detect Al3+ in a wide pH span (5.0–11.0) and enrich/remove excess Al3+ in water via an external magnetic field, which indicates that it has more potential and further practical applications for biology and toxicology. Furthermore, 1c provides good fluorescent imaging of Al3+ in living cells.
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DOI
PubMed
高影响因子
Journal of Chemistry
·
2019
·
IF 1.727
Dekui Bai,Xiaofang Wang,Dongxia Huo,Quanhong Ying,Ni Wang,Baixue Xia
Cu/Zn/Al-hydrotalcite-like compound (Cu/Zn/Al-HTlc) was prepared by the coprecipitation method with ZnII, AlIII cations solution, and electroplating wastewater containing CuII cation. The preparation conditions of Cu/Zn/Al-HTlc were optimized. The metal ion pollutants removal effect and iodide maximum adsorption capacity of Cu/Zn/Al-HTlc were also studied. The physicochemical properties of the Cu/Zn/Al-HTlc were analyzed by X-ray diffraction, FTIR, SEM, N2 adsorption-desorption isotherms, and TG-DTG. The results showed that Cu/Zn/Al-HTlc should be prepared with the ZnII-AlIII molar ratio of 1.5 : 1, pH = 11, and aged at room temperature for 0.5 d. Structural analysis showed that the Cu/Zn/Al-HTlc was a layered compound. CuII and other metal ion pollutants can also be successfully removed from electroplating wastewater in the preparation process of Cu/Zn/Al-HTlc and reached Chinese National Emission Standard (GB 21900-2008). The optimal adsorption condition of calcinated Cu/Zn/Al-HTlc for iodide was as follows: the solid-liquid ratio was 1 : 250, the pH value was 8, and the adsorption process was carried out at 25°C for 30 min. The saturated adsorption capacity reached 1000 mg·g−1 at the optimal adsorption condition. The main reason for this high-saturated adsorption capacity of Cu/Zn/Al-HTlc was that iodide penetrated into the layered structure of Cu/Zn/Al-HTlc by physical adsorption and CuII undergoes a specific redox reaction, producing CuI. Hence, coprecipitation synthetic technology and prepared Cu/Zn/Al-HTlc could be potentially used for electroplating wastewater treatment.
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高影响因子
Frontiers of Materials Science
·
2015
·Vol. 9
·期 4
·366-372
·
IF 1
Xia Yu,Ma Liang,Lu Hui,Wang Xian-Ping,Gao Yun-Xia,Liu Wang,Zhuang Zong,Guo Li-Jun,Fang Qian-Feng
Garnet-like Li 6.8 La 3 Zr 1.8 Bi 0.2 O 12 (LLZBO) + x mol.% Al 2 O 3 ( x = 0, 1.25, 2.50) lithium ionic electrolytes were prepared by conventional solid state reaction method under two different sintering temperatures of 1000°C and 1100°C. XPS, induced coupled plasma optical emission spectrometer (ICP-OES), XRD and AC impedance spectroscopy were applied to investigate the bismuth valance, lithium concentration, phase structure and lithium ionic conductivity, respectively. Electrical measurement demonstrated that ionic conductivity of Al-added LLZBO compounds could be obviously improved when the sample sintering temperature increased from 1000°C to 1100°C. The highest ionic conductivity 6.3×10 -5 S/cm was obtained in the LLZBO-1.25%Al sample sintered at 1100°C, in consistent with the lowest activation energy 0.45 eV for the lithium ion migration. The mechanism related with good ionic conductivity in the Al-added LLZBO sample was attributed to the lattice distortion induced by the partial Al substitution at Zr sites, which is helpful to improve the migration ability of Li ions in lattice.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Feifan Chen,Bo Zhang,Weihao Cai,Nengquan Fan,Yongkang Lu,Luxia Yin,ZeKai Zhang,Wensheng Ning
Ag/SiO2–Al2O3 aerogel composites with different molar ratio of Si to Al were prepared by the sol–gel synthesis followed by drying under atmospheric pressure and then characterized by XRD, FT-IR, BET, SEM, XRF, TG-DTG, and Py-FTIR, respectively. The effect of doping Al on their physicochemical properties and adsorption desulfurization performance was investigated in comparison with Ag/SiO2. The incorporation of Al in Ag/SiO2 resulted in a gradual decrease in the specific surface area, an increase in the actual content of Ag, and an appearance of Brönsted acid centers. The actual content of Ag in Ag/SiO2–Al2O3-n increased first and then decreased with the increase in Al content. Doping Al in Ag/SiO2 led to an improvement in the adsorption capacity and the adsorptive selectivity for thiophene at the presence of toluene and cyclohexene, as well as the solvent washing regeneration performance, attributed to the adsorption of thiophenics on Ag/SiO2–Al2O3-n by π-complexation of Ag(I) and the acid–base interaction of Lewis and Brönsted centers with thiophenics simultaneously, and the increase in the actual content of Ag in the adsorbents. Ag/SiO2–Al2O3-100 had the largest adsorption capacity for thiophene and benzothiophene, 12.2 mg of S/gads (0.57 mmol of S/mmol of (Ag + Al)) and 17.7 mg of S/gads (0.53 mmol of S/mmol of (Ag + Al)), respectively.
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高影响因子
Russian Journal of Physical Chemistry A
·
2023
·Vol. 97
·期 10
·2314-2320
·
IF 0.7
Chen Liyu,Wang Zhaowen,Yang Youjian,Tao Wenju,Shi Zhongning,Hu Xianwei
Abstract This paper focuses on preparation of Al–Zr master alloy and Al 3 Zr intermetallic compound. A method is proposed to obtain Al 3 Zr intermetallic compound from Al–Zr master alloy by leaching. The alloy was prepared by electrolysis in 2.4NaF–AlF 3 –5 wt % CaF 2 –5 wt % ZrO 2 cryolite-based electrolyte with the molten Al as cathode and the high purity graphite as anode at 980°C. Zirconium was deposited in the form of solid Al 3 Zr at the bottom of the cathode alloy, and the main phase compositions of the obtained Al-base alloy product were Al phase and Al 3 Zr phase. Then, cube-shaped Al 3 Zr intermetallic compound particles with an average size of 37.8 μm were obtained from the Al–Zr master alloy product by combining alkaline and acidic leaching.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Wenyu Wang,Qinyan Yue,Kangying Guo,Fan Bu,Xue Shen,Baoyu Gao
The membrane fouling is a challenge for the application of ultrafiltration , one of which the cake layer is the main influencing factor. However, the pros and cons of cake layer generated in the coagulation-ultrafiltration (C-UF) process needs to be explored. This study was carried out to investigate that the effect of a cake layer on the membrane fouling behavior with three Al species coagulants for different effluents. The results indicated that the fouling mechanisms of cake layer under different effluents conditions were diverse due to the particle characteristics. The Al hydrolysis that accompanied by the interaction between Al species coagulants and the –OH/-COOH functional groups of humic acid were conducted, and the effluents of Al a presented lighter membrane fouling. Meanwhile, the components mainly trapped by the membrane were soluble microbial products, protein, polypeptides and amino acid-like materials during C-UF process, because of the decrease in the proportion of fluorescence response. For the less/compact cake layer (system 2), the average of the external and internal membrane resistances were about 25 × 10 10 m −1 and 21 × 10 10 m −1 , respectively, which caused severe membrane fouling. It was concluded that the poriferous/loose cake layer could effectively alleviate membrane fouling by re-adsorbing some organic matters.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Linjia Li,Yiran Zhang,Jiaqi Feng,Shu Zhao,Ke Li,Zhen Huang,He Lin
Integrated carbon capture and utilization (ICCU), based on dual-function materials (DFMs), is an emerging technology for carbon dioxide (CO2) emission control. DFMs composed of Ni–Ca–Al systems are favored owing to their affordability. However, their performance needs to be further improved. In this study, Ni/AlCaOx DFMs are prepared by one pot-impregnation method, reaching an adsorbing capacity of 1796 μmol CO2/gDFM and a production of 1790 μmol CH4/gDFM after ten cycles at 450 °C. The Ni–Ca–Al synergistic effect was investigated to understand the good performance of DFMs: during H2 pretreatment, Ca can weaken the strong interaction of Al–Ni and promote the reduction of NiO by facilitating Ni to gain electrons from H2, where Al may act as an intermediate carrier for electron transfer. In the carbonation process, Al modulates the synergistic interaction between Ca and Ni by regulating the spacing and distribution of catalytic and adsorption sites to improve the Ni/AlCaOx cycling performance. Besides, oxygen vacancies can also enhance the DFMs’ carbon capture performance. During the methanation process, Ni reduces the decomposition temperature of the carbonate formed at strongly basic sites, favoring the methanation reaction.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Donghan Wang,Xiangzhi Meng,Yabing Shan,Shiyu Zhu,Ziwen Lin,Fei Shen,Juan Hou
The monitoring of heavy metal ions, especially mercury (Hg 2+ ), has become increasingly important due to their high toxicity, environmental persistence, and severe risks to human health. Herein, aluminum-doped carbon dots (Al-CDs) were synthesized via a one-step hydrothermal process using glutathione and AlCl 3 ·6H 2 O as precursors. The resulting Al-CDs emitted strong and stable fluorescence, achieving a high quantum yield of 55.17%. The fluorescence of Al-CDs was efficiently and selectively quenched by Hg 2+ , enabling highly sensitive detection with a low limit of detection of 0.018 μM. This sensing method displayed remarkable selectivity toward Hg 2+ over other ions and biomolecules. For application in real water samples, this method delivered successful outcomes with high recovery rates. To support on-site detection, a smartphone-based sensing system and portable fluorescent test strips were developed, offering a convenient, low-cost, and user-friendly approach for mercury monitoring. This study demonstrates great potential of Al-CDs as efficient fluorescent probes for environmental analysis and offers a practical strategy for the facile and visual detection of toxic heavy metal ions.
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产品关联
DOI
PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
·
IF 6.3
Shuhui Chen,Jinjie Mo,Ziye Ling,Zhengguo Zhang,Xiaoming Fang
The propensity for leaks in high-temperature molten alloys greatly restricts their extensive use in storing high-temperature thermal energy. In tackling this matter, the research concentrates on Al-Si/AlN composite phase change materials (PCMs), incorporating the modifier Sb to significantly improve their heat conduction and thermal steadiness. The results reveal that incorporating Sb alters the Si phase from a bulk form to an elongated one, simultaneously triggering the creation of an Al-Si@Al 2 O 3 core-shell configuration. This structural optimization reduces free electron scattering and extends the mean free path of electrons, thereby improving the thermal conductivity of the material. It was established that the ideal fraction of Sb mass is 0.6 %, where the thermal conductivity of the Sb-altered Al-Si/AlN composite PCMs attains 49.5 W/(m·K), marking a 15.2 % enhancement over the original Al-Si/AlN composite PCMs, with a latent heat of 351.5 kJ/kg. Additionally, the creation of the Al 2 O 3 shell led to the altered materials showing remarkable thermal stability across 200 high-temperature thermal cycles, resulting in less than a 4 % decrease in latent heat post-cycle and no leakage detected. The study offers not just an innovative approach for creating advanced Al-Si/AlN composite PCMs but also broadens their use in storing thermal energy at high temperatures.
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产品关联
DOI
高影响因子
Advanced Sustainable Systems
·
2023
·Vol. 8
·期 2
·2300331
·
IF 7.1
Cailing Yang,Wenxu Zhang,Rongnian Xu,Huaiwu Peng,Zhenshi Zhang,Xiaomei Liu,Li Li,Tingli Li,Jing Li,Pengbo Liu,Xinlu Jin,Yuanyuan Ma,Ziqiang Lei
Modified MIL-101(Al)-NH 2 (MIL-101(Al)-NH 2 -net) is used as a crosslinking agent and acrylic acid (AA) as a monomer, the MIL-101(Al)-NH 2 -net grafted polyacrylic acid (MIL-101(Al)-NH 2 -net-g-PAA (MAP)) composite water-absorbent material is synthesized using the free radical polymerization method to study the application of composite absorbent materials in water collection. The structure and morphology of the composite water-absorbent material are characterized using Fourier transform infrared spectrometry (FTIR), scanning electron microscope (SEM), transmission electron microscope (TEM), Brunauer Emmett Teller (BET), and thermogravimetric analysis (TG), and the contents of ammonium persulfate (APS), MIL-101(Al)-NH 2 -net, and neutralization degree of AA are optimized. Under optimal conditions, the water absorption ratios of the composite materials in distilled water, tap water, and 0.9% NaCl solution are 744, 169.5, and 85.5 g g −1 . In addition, the properties of collecting water vapor are investigated. At 25 °C, 50% Relative Humidity (RH), 70% RH, and 90% RH, the MAP water vapor adsorption capacity is 0.0312, 0.5760, and 1.6856 g g −1 , respectively. The water vapor adsorption of MIL-101(Al)-NH 2 and MIL-101(Al)-NH 2 self-polymerization products are 0.025 and 0.1278 g g −1 , respectively. The result showed that autopolymerization can improve the water vapor adsorption performance.
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2018
·
IF 2.873
Fujuan Chu,Chuandong Zuo,Chaoyang Ma,Zhaobo Tian,Taotao Feng,Chong Zhao,Yuzhen Wang,Wenfeng Dong,Jiaqi Long,Zicheng Wen,Xuanyi Yuan,Yongge Cao
Compared the most reported synthesis methods, a series of La x Sm 1−x Mn 2 O 5 (x = 0, 0.1, 0.3, 0.5) catalysts were first synthesized through sol-gel solution combustion synthesis with a short cycle and high yield. The main impact of different La/Sm molar ratios is the amount of surface adsorbed oxygen (O ads ) and surface Mn 4+ ions as revealed by XPS results. Electrochemical properties are characterized by rotating disk electrode (RDE) and the full dischargeable Al-air battery with 4 M NaOH electrolyte. The measurements of RDE reveal that the electron transfer number of La x Sm 1−x Mn 2 O 5 (x = 0, 0.1, 0.3, 0.5) are all closed to 4, and the sample prepared with x = 0.1 possesses the most excellent electrocatalytic activity for oxygen reduction reaction (ORR) and good discharge performance in alkaline medium. All of the above results indicate that the La x Sm 1−x Mn 2 O 5 (x = 0, 0.1, 0.3, 0.5) are promising catalysts with a high catalytic activity toward ORR.
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高影响因子
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