CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Tao Deng,Yilin Zhang,Xinyu Zeng,Fukang Chen,Yan Yan,Yang Li,Mingyang Tang,Leiyang Zhang,Li Jin,Gang Liu
To acquire electric capacitors with enhanced energy storing performance, a composition embellishment and process improvement strategy were adopted. A serial of lead-free (Ba 0.875 Bi 0.125 ) (Li 0.0625 Nb 0.0625 Ti 0.875 )O 3 (BBLNT) ceramics were prepared via both conventional solid-state method and viscous polymer processing technology (VPP). The BBLNT-VPP ceramics achieved an ultrahigh energy storing density of 5.34 J/cm 3 and a reasonable efficiency of 88% at 470 kV/cm. In addition, the ceramics have particularly extraordinary temperature stability of W rec 2.8 J/cm 3 , △η 2.5% over 30–150 °C, as well as excellent frequency stability with W rec 3.46 J/cm 3 , η 88%, △W rec ±2.7% and △η ±4% in the range of 5–300 Hz. Meanwhile, the power density of the ceramic remained above 84.04 MW/cm 3 when the temperature was increased from room temperature to about 150 °C, indicating the ceramics possess great promise. Therefore, the BBLNT-VPP ceramics with excellent properties obtained in this work can be potentially applied in dielectric capacitors.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Gang Liu,Huanghui Nie,Leiyang Zhang,Xinyu Zeng,Yazhong Zheng,Xinyu Chen,Xinran Wang,Kun Yu,Li Jin,Yan Yan
To acquire giant electric field-induced strain in non-Pb materials is attracting a great deal of attention in the past decade. In the current investigation, the crystal and domain structures as well as the electrical performances of (1- x ) (0.94Bi 0.5 Na 0.5 TiO 3 -0.06BaTiO 3 )- x NaTaO 3 (BNBT- x NT) specimens were systematically studied to achieve enhanced strain. The introduction of NT makes the phase structure transit from rhombohedral-tetragonal to pseudo-cubic structure. The original domain structure of BNBT is destroyed, and the disorder degree of the local structure increases. Simultaneously, the remnant polarization, coercive field, and piezoelectric coefficients were significantly decreased. The transition from ferroelectric to ergodic relaxation can be effectively modified, thus lowering the transition zone to room temperature. Finally, the BNBT-3NT ceramics achieve marked strain coefficients at room temperature, with a maximum strain of 0.394% under 65 kV/cm and a d 33 * of 606 pm/V.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Xiaoqi Liu,Yanyun Zhang,Yan Liu,Ting'an Zhang
Chitosan bead grafted by third-generation dendrimers (CB-G3) with a diameter of 1.40 mm was synthesized to investigate their performance in recovering Ag(I), Cu(II), and Pb(II) ions in aqueous media. The prepared adsorbents were characterized by XRD, FT-IR, elemental analysis, TGA , and SEM, and the effects of pH, contact time, concentration, and temperature were examined. The results showed that the adsorbents were successfully fabricated. The optimum pH value was 5, and the increased generation number contributed to adsorption capacity improvement, indicating that electrostatic interactions between amine groups and metal ions are the governing mechanism of adsorption by the CB-G3. The kinetics, isotherms, and thermodynamics of Ag(I), Cu(II), and Pb(II) adsorption onto the CB-G3 were investigated. The adsorption processes can be described using pseudo-second-order kinetic and Langmuir models. The maximum monolayer adsorption capacities were 105.62, 88.82, and 97.87 mg·g −1 for Ag(I), Cu(II), and Pb(II) at 30 °C within 210 min, respectively. Electrostatic interactions and hydrogen bonds are the main mechanisms between metal ions and N atoms. Therefore, the CB-G3 is a promising candidate for Ag(I), Cu(II), and Pb(II) adsorption owing to its splendid ability in easy separation, good adsorptivity, and reusability for efficiently adsorbing Ag(I), Cu(II), and Pb(II) ions.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2023
·
IF 11.1
Yaoyao Zhang,Kangze Yuan,Luca Magagnin,Xishe Wu,Zhenyi Jiang,Wei Wang
Mercapto-functionalized aerogels (MA-X) were fabricated using γ-mercaptopropyltrimethoxysilane (MPTMS) as a modification reagent to eliminate Pb (II) and Cu (II) ions from wastewater. Mercapto-functionalized aerogel (MA2) with the MPTMS/TEOS molar ratio of 0.5 exhibited the maximum adsorption amounts of 163.99 mg/g for Pb (II) and 172.41 mg/g for Cu (II) in single ion system, respectively. In binary ion system, selective adsorption experiments revealed that the equilibrium adsorption capacity for Cu (II) (161.29 mg/g) was significantly greater than Pb (II) (90.42 mg/g), and the selectivity factor α showed greater selectivity for Cu (II), demonstrating that Cu (II) was more readily adsorbed on MA2. The results showed that adsorption was consistent with pseudo-second order model and Langmuir model. Thermodynamic results demonstrated that adsorption phenomenon was an exothermic reaction that occurred spontaneously. XPS analysis and density functional theory (DFT) simulations showed that the main mechanism for the adsorption of Pb (II) and Cu (II) on MA2 was through coordination chelation of the –SH groups with Pb (II) and Cu (II). DFT calculations showed a lower adsorption energy (E ads ) of Cu (II) (−2.72 eV) with respect to Pb (II) (−0.80 eV), indicating that Cu (II) was more stably adsorbed on MA2 and more difficult to exchange by Pb (II). In order to determine the environmental impact of the MA2 preparation process, a life cycle assessment (LCA) was conducted and contribution of each material to MA2 production was analyzed. Finally, a strategy that is environmentally friendly and effective has been proposed in order to facilitate MA-X adsorbents production and to improve their application for the treatment of heavy metal polluted wastewater.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2023
·Vol. 52
·期 11
·7184-7192
·
IF 2.1
Yang Shengyan,Chang Niannian,Han Mengyuan,Zhang Yang
Pb-free piezoelectric ceramic materials (K 0.48 Na 0.48 Li 0.04 )(Nb 0.92 Ta 0.08− x Sb x )O 3 (KNLNTS) were designed and prepared. The effects of varied Sb/Ta doping on the physical structure, surface morphology, and electrical characteristics of ceramics were also studied. The perovskite structure is present in all of the doped ceramic samples without any secondary phase (when x < 0.05). All of the doped ceramic samples have a Curie temperature ( T C ) above 300°C. At the same time, the orthorhombic–tetragonal phase transition temperature ( T O–T ) is pushed closer to ambient temperature. Doping with Sb/Ta/Li changed the electrical characteristics of the samples and increased their piezoelectric properties. At x = 0.03, the KNLNTS sample has the best piezoelectric properties: d 33 = 215 pC/N, Pr = 26.08 μC/cm 2 , T C = 342.6°C.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Bin Liu,Peng Lv,Ruofei Wu,Yonghui Bai,Jiaofei Wang,Weiguang Su,Xudong Song,Guangsuo Yu
The discharge of large-scale industrial solid waste and wastewater has caused severe damage to environmental health. In this study, the adsorption behaviors of Pb(II) and Congo Red (CR) dye in single and binary aqueous systems were investigated using novel functionalized nanoporous glass microspheres (NGM). The NGM material was fabricated from coal gasification fine slag (CGFS) by a simple treatment and characterized using TG, BET, XRD, TEM, FT-IR, and XPS to analyze its physicochemical properties. The adsorption experiments showed that the adsorption amounts of DMA-NGM for Pb(II) and CR were 302.39 mg/g and 342.74 mg/g for the single systems, and 372.73 mg/g and 412.93 mg/g for the binary systems, respectively. The increased adsorption capacity was attributed to the synergistic effect of electrostatic attraction and chelation. Furthermore, the pseudo-second-order model and Elovich model could reasonably describe the adsorption of Pb(II) and CR on DMA-NGM. Pb(II) adsorption on DMA-NGM was monolayer adsorption and CR adsorption was multilayer adsorption. In summary, the results demonstrate the potential of efficient and environmentally friendly adsorbents for the resource recovery of CGFS and the processing of printing and dyeing wastewater.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Qiuping Fu,Jie Lou,Hui Yuan,Rongbin Zhang,Chunmei Zhang,Changli Mo,Jun Luo,Lei Zha,Pan Wu
ZIF-67@CS composites were prepared by in-situ growth method. The phase and structure of ZIF-67@CS composite were characterized by X-ray powder diffraction (XRD) and fourier transform infrared spectroscopy (FT-IR). The morphology of the materials was characterized by field emission scanning electron microscope (SEM). X-ray photoelectron spectroscopy (XPS) measurements demonstrated the existence of Pb(II) after the adsorption process of composite materials. The adsorption of Pb(II) by composite material conforms to Langmuir model, the theoretical maximum adsorption capacity is 505.051 mg/g. The pseudo-second-order kinetic model can well describe the adsorption kinetic process.
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 10
·26191-26207
·
IF 5.19
Lu Yanrong,Lin Hai,Zhang Ye,Dong Yingbo
In this study, sodium lignosulfonate modified illite (LS-ILT), an environmentally friendly adsorbent, was prepared by hydrothermal modification. An extensive study of Pb(II) and Cd(II) adsorption behavior and the mechanisms were conducted by evaluating the effects of initial pH value, sorbents dosage, and initial concentration of Pb(II) and Cd(II). Results showed that the adsorption characteristics of Pb(II) and Cd(II) by LS-ILT were well described by quasi-second-order kinetics and the Freundlich model, and the maximum adsorption capacity of Pb(II) and Cd(II) was 42.3 mg/g and 17.0 mg/g, respectively. The optimal application conditions for adsorption equilibrium were the dosage of 4 g/L and reaction pH = 5.5–5.8. The adsorption stability of Pb(II) by LS-ILT was better than that of Cd(II), and most of the existence of coexisting cations had no obvious inhibitory effect on the removal of Pb(II) and Cd(II). Furthermore, the dynamic adsorption results showed that LS-ILT can meet the ultra-low emission standard, and the adsorption capacity could maintain over 50% after four cycles, further providing certain guiding significance for the treatment of wastewater with ultra-low concentrations of heavy metals Pb(II) and Cd(II).
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 7
·18364-18379
·
IF 5.19
Zhang Xiao,Li Zhiyue,Zhang Taoyi,Chen Jing,Ji Wenxi,Wei Yun
A low-cost and environmental-friendly sodium alginate-melamine@zeolitic imidazolate framework-67 (SA-ME@ZIF-67) adsorbent was fabricated by chemical grafting and in situ growth for the removal of lead ions in wastewater. Firstly, melamine (ME) was grafted onto sodium alginate (SA) by amide reaction, and then SA-ME was dropped into a solution of calcium chloride to form hydrogel bead, and ZIF-67 was grown on the SA-ME hydrogel bead by the in situ growth method. The SA-ME@ZIF-67 adsorbent was characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction. The SA-ME@ZIF-67 adsorbent was used to effectively adsorb Pb(II) from aqueous solutions. The initial concentrations of lead ions, adsorbent dose, initial pH of lead ion solution, temperature, and adsorption time for the material were optimized. The adsorption isotherms and kinetics fitted to Langmuir isotherm model ( R 2 = 0.9281, 0.9420, and 0.9623 at the temperatures of 288.15 K, 298.15 K, and 308.15 K, respectively) and pseudo-second-order kinetic model ( R 2 = 0.9901) respectively. According to the Langmuir model at 308.15 K, the maximum adsorption capacity of the adsorbent for Pb(II) was 634.99 mg/g. The recycling application of the adsorbent was possible as it was easily collected and reused after five adsorption-regeneration cycles. In addition, the Pb(II) in real wastewater samples has been efficiently removed using the fabricated hydrogel. The results showed that the SA-ME@ZIF-67 adsorbent had high adsorption capacity, removal efficiency, and easy recyclability for Pb(II). Graphical abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 19
·10750-10758
·
IF 14.511
Hanyu Wang,Wenjing Zou,Yukun Ouyang,Xiong Deng,Hu Luo,Juehao Xu,Xingchong Liu,Haimin Li,Xiaoli Gong,Yue Lei,Yafei Ni,Yongshan Peng
Ionic defects in perovskite films decrease both the power conversion efficiency (PCE) and stability of a perovskite solar cell (PSC). Herein, fluorinated D-pentafluoro-phenylalanine (D-PFPAA) zwitterions are introduced into a perovskite to passivate the ionic defects and effectively consolidate the Pb–X framework to suppress ion migration. The results demonstrate that the amino, carboxyl, and fluorine groups in D-PFPAA can support the multifunctional passivation of both positive and negative ionic defects, including uncoordinated Pb2+ ions and halogen (X−) defects in the perovskites, thereby effectively suppressing charge recombination. Consequently, a D-PFPAA-modified device shows a highest PCE of 21.56% with an increased open circuit voltage of 1.15 V. Apart from the consolidated Pb–X framework, resulting from multifunctional passivation, the fluorine groups in D-PFPAA can also form an effective hydrophobic barrier to protect the perovskite film from moisture-related erosion. As a consequence, the D-PFPAA-modified device retains more than 85% of its original PCE after undergoing 500 h of aging at 45% relative humidity under ambient conditions. This work provides a promising strategy for the realization of efficient and stable PSCs via the selection of fluorinated zwitterions to passivate the ionic defects, inhibit ion migration, and protect against moisture damage.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 2
·1130-1140
·
IF 4.036
Xuan Zhou,Yunlong Liu,Can Jin,Guomin Wu,Guifeng Liu,Zhenwu Kong
The effective and selective removal of heavy metal ions from sewage is a major challenge and is of great significance to the treatment and recovery of metal waste. Herein, a novel magnetic lignin-based adsorbent L@MNP was synthesized by a thiol–ene click reaction under ultraviolet (UV) light irradiation. Multiple characterization techniques, including Fourier transform infrared (FT-IR) spectrometry, X-ray diffraction (XRD), elemental analysis, vibrating sample magnetometry (VSM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), confirmed the formed nano-morphology and structure of L@MNP. The effects of pH, contact time, initial metal concentration and temperature on the batch adsorption of Pb(II) by L@MNP were investigated. Due to the existence of sulfur and oxygen-containing sites, the maximum adsorption capacity of L@MNP for Pb(II) could reach 97.38 mg g−1, while the adsorption equilibrium was achieved within 30 min. The adsorption kinetics and isotherms were well described by the pseudo-second-order model and Langmuir model, respectively, suggesting a chemical and monolayer adsorption process. In addition, L@MNP showed a high adsorption selectivity (kPb = 0.903) toward Pb(II) in the presence of other co-existing metal ions. The experimental results also revealed that L@MNP displayed structural stability, ease of recovery under an external magnetic field, and acceptable recyclability after the fifth cycle. Considering its facile preparation, low cost and high adsorption efficiency, the developed L@MNP adsorbent demonstrated great potential in removing heavy metal ions from wastewater.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 15
·8424-8431
·
IF 14.511
Peng Du,Chenbo Yuan,Xiaoyu Cui,Kaifu Zhang,Yu Yu,Xiaodi Ren,Xiaowen Zhan,Shan Gao
The commercialization of Li metal anodes has been long hindered by uncontrolled dendrite growth, infinite volume expansion and poor Li metal utilization. Herein, we achieve a uniform nano-Pb decoration on carbon cloth (Pb@CC) by exploiting the thermal decomposition process of lead acetate trihydrate monitored by in situ Raman spectroscopy. 3D hosted Li anodes are fabricated via a record-fast infusion (1.0 s) of accurate weight-controlled molten Li into the highly lithiophilic Pb@CC host at a considerably low temperature of 250 °C. At an optimal Li loading of 10 mg, the Pb nanoparticles guide the uniform distribution of Li sites over the robust yet porous electron-conducting carbon network, which not only directs and confines Li nucleation and growth, but accommodates volume changes during repeated Li stripping/plating processes. The resulting Li electrodes afford an ultralong cycle life of 4648 h at low overpotentials of <50 mV under 1 mA cm−2/1 mA h cm−2 symmetric-cell cycling, which is among the best records ever reported in the literature. The corresponding LiFePO4 and LiNi0.8Co0.1Mn0.1O2 full cells deliver significantly higher cycling and rate performances than those with Li foils. Furthermore, the effect of Li utilization is explored in Li‖LiFePO4 full cells, with the best cyclability achieved at a low N/P ratio of 63.28. The present findings stretch the practical feasibility of wetting-assisted molten Li infusion in mitigating dendrite growth and improving Li utilization towards long-cycling high-energy-density Li metal batteries.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）