CHEMISTRY OF MATERIALS
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2020
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IF 9.567
Lu Qi,Zhaohui Chen,Xuerui Shi,Xiaodong Zhang,Qun Jing,Na Li,Zhongqi Jiang,Bingbing Zhang,Ming-Hsien Lee
Exploring novel photoelectric functional materials via chemical substitution-oriented design is an effective strategy, which can be expanded to the discovery of high-performance UV nonlinear optical (NLO) materials. Two new NLO pyrophosphates, Rb3BaBi(P2O7)2 (I) and Cs3BaBi(P2O7)2 (II), are rationally developed by a cation substitution technique based on A3PbBi(P2O7)2 (A = Rb and Cs), of which I inherits the large second-harmonic generation (SHG) response (exptl 2.5 × KDP; calcd 2.9 × KDP) and moderate birefringence (0.025@1064 nm) accompanied by a broadened UV transparent region. Compounds I and II are isomeric and exhibit different Ba–P–O frameworks. Especially, I possesses a large SHG effect benefiting from the favorable pentagonal-net topological structure. Detailed theory calculations elucidate the origin of the linear and nonlinear optical properties of the compounds. The insights obtained from the atomic-level module adjustment involving lone-pair-active optical anisotropy are useful for designing more efficient UV NLO materials.
研究领域:
材料科学
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非线性光学
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无机化学
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晶体工程
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计算材料科学
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2022
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IF 6.364
Jian Guo,Xuhui Fan,Ji Zhang,Shan-Tao Zhang,Bin Yang
Developed ceramic capacitors with excellent recoverable energy storage density ( W rec ) and efficiency ( η ) are greatly desired for next-generation pulsed power devices but challenge as well. Herein, outstanding W rec of 5.2 J/cm 3 and η of 82% are achieved in the PbO-doped fine grain Bi 0.25 Na 0.25 Sr 0.5 TiO 3 (BNST-P) based relaxor ferroelectric ceramics . The corresponding mechanism is that A-site Pb-doping increases maximum polarization and breakdown strength , and suppresses remnant polarization simultaneously. Meanwhile, the energy storage property possesses excellent temperature and frequency stability, and the variation of W rec and η is less than 5% within the range of 25–100 °C and 2–100 Hz. Encouragingly, superior charge-discharge performance with fast discharge speed t 0.9 of 24 ns and high power density P D of 296 MW/cm 3 is obtained. These striking comprehensive results suggest BNST-P ceramics possess potential prospects for applications.
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高影响因子
MICROCHEMICAL JOURNAL
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2023
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IF 4.8
Lin He,Chunwen Chang,Qiang Xue,Xizhou Zhong,Xin Zhao,Yao Liu,Zeyu Liu,Xianbo Ding
Plasma enhanced chemical vapor deposition (PECVD) system was used to prepare a vertically arranged graphene (VG) thin-film materials. Bismuth nanoparticles (BiNPs) of different sizes were loaded on VG films by physical vapor deposition (PVD) technique to obtain a BiNPs decorated VG screen-printed electrodes (BiNPs/VG-SPEs) with high sensitivity. The morphology and electrochemical properties of VG-SPE and three BiNPs/VG-SPEs with different sizes of BiNPs were studied by various interface characterization and electrochemical measurements. Compared with pristine VG-SPEs, BiNPs/VG-SPEs demonstrated better electrochemical performance. The electrode with smaller size of BiNPs has the larger electrochemical active area and higher electron transfer efficiency, achieving better electrochemical response to Pb(II) ions. Therefore, VG-SPE with smallest size of BiNPs (4.6 ± 0.5 nm) was utilized to detect Pb(II) ions in aqueous solution. Under the optimized conditions, BiNPs/VG-SPE showed a broader linear concentration range (5–200 μg/L) with a low detection limit (0.15 μg/L). This sensor was also successfully applied for detection of Pb(II) ions in groundwater and tap water. Recovery rates ranged from 96.2 to107.2 % with a relative standard deviation (RSD) less than 6.8 %. It also has good anti-interference and repeatability. Our results provide a promising sensor technique for efficient and rapid in situ monitoring of Pb(II) ions in aquatic environments.
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高影响因子
DIAMOND AND RELATED MATERIALS
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2022
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IF 3.806
Yao Liu,Chunwen Chang,Qiang Xue,Rong Wang,Lingxia Chen,Zeyu Liu,Lin He
Since lead is teratogenic, carcinogenic and mutagenic, people pay increasing attention to lead contamination in water environment. In this work, a novel electrochemical sensor was developed to detect Pb(II) ion in water by PPy , MOFs and bismuth film (BF) modify GCE . Scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, electrochemical impedance spectroscopy , contact angleanalyses, cyclic voltammetry and differential pulse anodic stripping voltammetry were used to characterize the BF-PPy/UIO-66-NH 2 /GCE surface, revealing the physical and electrochemical properties of the electrode. MOFs increased the specific surface area and adsorption site of the electrode. The PPy enhanced the conductivity of the composites materials. MOFs and PPy synergistically promoted the electrochemical performance of the electrode. The deposition potential, deposition time , solution pH and Bi (III) concentration were optimized to determine the optimal detection condition. The electrode has a wide linear range (0.5 to 10 μg/L) with a low detection limit (0.05 μg/L). This electrode also has good anti-interference, repeatability and stability. Besides, it has been successfully applied to the detection of actual water samples. The recovery rates ranged from 95.4 % to 102.8 % with a relative standard deviation (RSD) less than 4.40 %. Our results provide an insight on efficient and rapid detection of Pb(II) ions in water environment in the future.
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Polymers
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2022
·Vol. 14
·期 22
·4888
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IF 4.967
Jia Qu,Hongpu Huang,Qiang Yang,Wei Gong,Meilan Li,Liangliang Chang,Baoyue Cao,Guochun Zhang,Chunsheng Zhou
Water pollution is a worldwide problem that requires urgent attention and prevention and exceeding use of heavy-metal ions is one of the most harmful factors, which poses a serious threat to human health and the ecological environment. In this work, a magnetic oxidized micro/mesoporous carbon (MOMMC) was prepared for the easy separation of Cu(II) and Pb(II) from water. The dual-template method was used to prepare micro/mesoporous carbon using sucrose as the carbon source, silica nanoparticles formed by tetraethyl orthosilicate as the microporous templates, and triblock copolymer F127 as the mesoporous template. MOMMC was obtained by oxidation using potassium persulfate and then magnetized through in situ synthesis of Fe3O4nanoparticles. FTIR, TG-DSC, XRD, TEM, SEM, nitrogen adsorption–desorption isotherms, zeta potential, and VSM were used to confirm the synthetic process, structure, and basic properties of MOMMC. The high-saturation magnetization (59.6 emu·g−1) of MOMMC indicated its easy and fast separation from water by an external magnetic field. Kinetics studies showed that the adsorption of Cu(II) and Pb(II) on MOMMC fit the pseudo-second-order model well. Isotherm studies showed that the adsorption behavior of Cu(II) was better described by the Langmuir model, and the adsorption behavior of Pb(II) was better described by both Langmuir and Redlich–Peterson models. MOMMC obtained efficient adsorption for Cu(II) and Pb(II) with the large adsorption capacity of 877.19 and 943.40 mg·g−1according to the Langmuir adsorption isotherm equation, and a better selectivity for Pb(II) was observed in competitive adsorption. MOMMC still possessed a large adsorption capacity for Cu(II) and Pb(II) after three adsorption–desorption cycles. These findings show that MOMMC represents an excellent adsorption material for the efficient removal of heavy-metal ions.Keywords:magnetic mesoporous carbon;adsorption;copper;lead;adsorption kinetics;adsorption isotherms;selectivity
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Guifang Wang,Guangchuan Liang,Huizhen Xiao,Jun Qiu,Haiyan Liu,Shaojian Ma,Sridhar Komarneni
The conventional environmental remediation materials, which are applied for the long-term treatment of mine tailings are easy to fail when affected by acid rain. Therefore, dynamic column simulation experiments were conducted to compare the immobilization persistence of As, Mn, Pb and Zn by the addition of triethylenetetramine modified montmorillonite (TTA-Mt) and calcium-based montmorillonite (Ca-Mt) in sulfide tailings during a simulated 5-year study of acid rain leaching. The structural and morphological characteristics of TTA-Mt were analyzed with FTIR, XRD, SEM, TEM and EDS. Results showed that the additions of TTA-Mt could persistently immobilize the heavy metal ions while Ca-Mt additions had little effect. After long-term simulated leaching for 5 years, TTA-Mt still had superior environmental stability for Zn and As with the immobilization rates of 96% and 86%, and the leaching amounts of Mn and Pb were less than 4.23 and 0.66 mg/kg, respectively. Morphology and chemical fraction analyses confirmed that the immobilization was mainly due to the formation of relatively stable phases by complexation and precipitation. Results presented here demonstrated the significant potential of TTA-Mt for long-term immobilization of heavy metals in tailings against acid rain and thus could provide guidance for remediation of tailings.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2022
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IF 6.364
Linjing Liu,Bin Yang,Shuai Yang,Qiangwei Kou,Hang Xie,Yuan Sun,Yunfei Chang,Shan-Tao Zhang,Fei Li
Grain-oriented Pb(Mg 1/3 Nb 2/3 )O 3 -PbZrO 3 -PbTiO 3 (PMN-PZ-PT) based ceramics were synthesized through templated grain growth via using BaTiO 3 (BT) templates. Although BT templates are partially destroyed by PMN-PZ-PT matrix, CuO addition remarkably promotes [001] c -oriented grain growth behavior of the ceramics, resulting in an improvement of Lotgering factor F 001 from ~86% to 98%. Both crystallographic texture and CuO doping increase tetragonality and reduce average domain size of the ceramics dominated by rhombohedral phase. Consequently, 0.50 wt% CuO-doped ceramics ( F 001 ~98%) exhibit optimum electromechanical properties: d 33 ~860 pC/N, d 33 × g 33 ~48.6 × 10 −12 m 2 /N, k p ~0.80, E c ~7.2 kV/cm, tan δ ~0.8% and T c ~222 °C. In addition to ~3.7 times and 6.6 times higher d 33 and d 33 × g 33 , those ceramics possess about 240% enhanced piezoelectric strain and much better thermal stability ( S max / E max variation ≤2% between RT and 150 °C) relative to non-textured counterpart. This work offers a good paradigm for simultaneously exploring high piezoelectric response and good temperature stability in piezoceramics, benefiting the development of next-generation advanced electromechanical devices.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Lin Han,Tingting Wang,Jianchao Gong,Xin Li,Yaxiong Ji,Shifeng Wang
To address the competitive adsorption of complex wastewater components on organo-vermiculites (organo-Vts), multi-hydroxy containing gemini surfactants varying in alkyl chain length (G 12 , G 14 and G 16 ) are designed and applied for modifying Na-vermiculite (Na-Vt) targeted to the removal of co-existing MB and Pb(II). Organo-Vts exhibit enhanced hydrophobicity and enlarged interlayer spacing compared with Na-Vt, with the saturated modifier dosage reaching as low as 0.4 CEC of Na-Vt. Shorter alkyl chain induces suitable packing density and interlayer environment, endowing G 12 -Vt the highest adsorption capacity towards MB/Pb(II) compared with G 14 -Vt and G 16 -Vt (178.3/63.0 mg/g compared with 143.7/38.1 and 88.6/36.6 mg/g, respectively). Freundlich isotherm and PSO kinetic model are agreeable (the values of R 2 are higher than 0.98) with the endothermic adsorption processes . Notably, a simultaneous effect in binary-component system is obtained, and the maximum adsorption capacities of G 12 -Vt towards MB/Pb(II) reaching 349.9 and 124.5 mg/g, which are 1.96 and 1.95 times higher than single-component system, respectively. Combination of theoretical fitting and molecular simulation co-reveals the adsorption mechanism: the simultaneous effect is due to the providing of additional active sites by the adsorbed MB, which is stronger than that between Pb(II) and the modifier. Existence of π-ion interaction enhances the retention of Pb(II) for a further step. This work broadens a new research perspective for complex wastewater treatment and provides a deep understanding of the stimulative adsorption mechanism between dyes and metal ions .
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高影响因子
CERAMICS INTERNATIONAL
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2021
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IF 4.527
Xinyu Zeng,Yang Li,Jia Dong,Jingli Li,Zhaoyu Yang,Chunlin Song,Gang Liu,Yan Yan
In the current study, a series of CeO 2 -doped ( x = 0.01, 0.015, 0.02, 0.025 mol) ceramic samples were prepared, and the valence of Ce in the perovskite was analyzed in detail, revealing the polarization contribution and effect mechanism of the doped Ce element in the 0.65BaTiO 3 –0.35Sr 0.7 Bi 0.2 TiO 3 ceramic. The phase structure and electrical stored energy performance of the resulting ceramics were also characterized. It was found that adding an appropriate amount of CeO 2 to BaTiO 3 was helpful for improving the relaxor behavior, promoting electric storage, and releasing ceramic materials. Particularly, the electric breakdown strength of the 0.02Ce-doped specimen reached 330 kV/cm, and the corresponding density and efficiency were 2.57 J/cm 3 and 81.30%, respectively. In addition, doping with Ce caused the ceramics to exhibit good stability at frequencies of 1–300 Hz and over a temperature range of 30–150 °C. A high current density ( C D ) and power density ( P D ) were obtained in charge–discharge tests.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2021
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IF 4.464
Shanshan Wei,Haolin Xiao,Miao Gu,Zhencheng Chen,Liangli Cao
In this study, a sensitive and quantitative label-free electrochemical immunosensor based on bimetallic [email protected] nanoparticles , Prussian blue (PB), and reduced graphene oxide-tetraethylene pentamine nanocomposite (rGO-TEPA) was constructed to achieve sensitive detection of HBsAg. A one-pot green method was used to synthesize interlocked rGO-TEPA/PB hybrid composites as high-performance materials with good conductivity . PB was the electron transfer mediator used to provide electrochemical signals. By utilizing rGO-TEPA as supporting material , the stability and intensity of PB were greatly improved. The incorporation of highly conductive [email protected] nanoparticles could further amplify the electrochemical signal, and the high adsorption capacity could provide an efficient substrate for hepatitis B surface antibody (HBsAb) immobilization. Under optimal conditions, the immunoassay had a wide linear range from 0.25 pg mL −1 to 400 ng mL −1 and a low detection limit of 0.08 pg mL −1 (S/N = 3). This method was also applied to the analysis of human serum samples, and the obtained results were on par with those of electrochemiluminescence immunoassay (ECLIA), suggesting significant potential for this new method in clinical research.
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高影响因子
WASTE MANAGEMENT
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2021
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IF 7.145
Huayi Chen,Xingjian Yang,Yonglin Liu,Xueming Lin,Jinjin Wang,Zhen Zhang,Na Li,Yongtao Li,Yulong Zhang
Waste chicken feathers are the ideal precursor for the production of low-cost N-enriched biochar. KOH-modified N-enriched biochar (KNB) containing 15.92 wt% N was successfully prepared using waste chicken feathers. The adsorption kinetics results showed that KNB had rapid Cd (2 h) and Pb (1 h) adsorption rates. The Cd and Pb adsorption capacities of KNB (the values of K F were 22.324 (Cd) and 119.654 (Pb) mg 1−(1/n) ·L 1/n ·g −1 ) were 7.07 and 26.52 times higher than those of the original biochar based on the adsorption isotherm results. The KNB was stable at pH 3–6 and had stronger co-adsorption capacities in double-ion systems. Based on the adsorption experiments and various characterization methods, we concluded that the primary Cd and Pb adsorption mechanisms of KNB involved electrostatic interactions, cation-π interactions, complexation, and K + exchange. The precipitation mechanism could partially account for Pb adsorption but not for Cd adsorption. KOH modification enhanced the electronegativity of biochar and then increased the electrostatic attraction. Surface O- and N-containing functional groups were involved in Cd and Pb adsorption. Graphitic-N, oxidised-N, and O C O were the main active adsorption groups, the relative contents of which increased after KOH modification, thus increasing the Cd and Pb adsorption performance. Therefore, KNB can be used as a fast and highly efficient adsorption agent to remove Cd and Pb from wastewater containing either Cd and Pb or a combination of these two metals.
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高影响因子
RSC Advances
·
2020
·Vol. 10
·期 66
·40196-40205
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IF 3.119
Liwen Zheng,Yongchao Gao,Jianhua Du,Wen Zhang,Yujie Huang,Leilei Wang,Qingqing Zhao,Xiangliang Pan
We report here the preparation process of a recyclable magnetic biochar functionalized with chitosan and ethylenediaminetetraacetic acid (E-CMBC). This prepared biochar was then evaluated regarding its adsorption performance for Pb(II) from an aqueous solution along with the potential adsorption mechanisms behind this process. XRD and SEM analyses showed that the magnetite particles were successfully embedded into biochar and the subsequent surface coating of chitosan and ethylenediaminetetraacetic acid modification were also successful. The effects of the adsorbent dosage, ionic strength, initial solution pH, and contact time, on adsorption kinetics, adsorption isotherms, adsorption thermodynamics and regeneration performance were investigated. The removal of Pb(II) was dramatically improved to 156.68 mg g−1 compared with that by unmodified pristine biochar (10.90 mg g−1) at pH 3.0. In the range of pH 2.0–5.0, the adsorption performance of Pb(II) by E-CMBC remained above 152.50 mg g−1, which suggested that the adsorption capacity of the novel sorbent was not impacted by the competing adsorption of hydrogen cations under acidic conditions. The adsorption process could be well described by the Avrami fractional-order and Langmuir models. Thermodynamic analysis proved that the adsorption process was spontaneous and endothermic. The magnetic strength of E-CMBC was measured as 3.1 emu g−1, suggesting that the consumed E-CMBC could be separated from water by an external magnet. A regeneration study showed that after three cycles of adsorption–desorption, 78.60% of the sorbent was recovered and 97.26% of the adsorption capacity was retained. The adsorption mechanism investigation indicated that Pb(II) adsorption was mainly due to the presence of functional amides and carboxyl groups of E-CMBC forming strong chemical complexation. In conclusion, E-CMBC is a novel, recyclable, and highly efficient adsorbent for removal of Pb(II) from aqueous solution.
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高影响因子
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