JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2017
·Vol. 28
·期 18
·13770-13779
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IF 2.019
Jiang Liyang,Qi Jiqiu,Sui Yanwei,Liu Xiaofeng,He Yezeng,Meng Qingkun,Wei Fuxiang,Sun Zhi,Jin Yunxue
We reported a facile route for the fabrication of Al-doped TiO 2 nanostructure for supercapacitor electrode materials through an in-situ oxidation of Ti–8Al alloy. Ti–8Al alloy was prepared through solidification route. After high-temperature oxidation, rod-like and wall-like Al-doped TiO 2 composites were formed on the surface of Ti–8Al alloy flake. This kind of novel structure consisted of numerous nanorods and nanosheets, exhibiting large open space. When applied for supercapacitor, Al-doped TiO 2 composites electrode materials exhibited excellent electrochemical performance. After oxidation at 650 °C for 100 h, the electrode can deliver the highest capacitance of 4650 μF cm −2 at the current density of 10 μA cm −2 as well as long-term cycling stability of 98.5% of the initial specific areal capacitance after 6000 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Results in Physics
·
2018
·
IF 2.147
Wenqiang Su,Ping Wang,Zhengyang Cai,Junhe Yang,Xianying Wang
Molybdenum disulfide (MoS 2 ) has shown its promising performance for use as an electrocatalyst for hydrogen evolution reaction (HER). However, it has commonly suffered from limited edge active sites and stagnant conductivity in this regard. Therefore in the present work, with integrating graphene aerogel (GA) supporting and Al ions doping, we report for the first time one-pot hydrothermal synthesis of Al-doped MoS 2 @GA aerogel electrocatalysts with 3D porous network architecture. Vertical MoS 2 ultrathin nanosheets with defect-rich structure are grown on graphene nanosheets at the optimum weight ratio of 5 wt% GA, leading to the enhancement of HER activity. Simultaneously Al doping of 0.77 at% further optimizes the number of exposed active sites and conductivity. The overpotential at a current of 10 mA·cm −2 was successfully reduced to 212 mV with a Tafel slope value down to 41 mV/dec, benefiting from synergistically structural and electronic modulating of MoS 2 . The study thus sheds light on designing and developing high-performance 3D network electrocatalysts for HER reaction.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Yi-Hu Feng,Zhiwei Cheng,Chen-Liang Xu,Lianzheng Yu,Duo Si,Boheng Yuan,Mengting Liu,Bin Zhao,Peng-Fei Wang,Xiaogang Han
O3-NaNi0.25Fe0.5Mn0.25O2 layered oxide is considered one of the most promising cathode candidates for sodium-ion batteries because of its advantages, such as its large capacity and low cost. However, the practical application of this material is limited by its poor cyclic stability and insufficient rate capability. Here, a strategy to substitute the Fe3+ in NaNi0.25Fe0.5Mn0.25O2 with Al3+ is adopted to address these issues. The substitution of Fe3+ with Al3+ enhances the framework stability and phase transition reversibility of the parent NaNi0.25Fe0.5Mn0.25O2 material by forming a stronger TM–O bond, which improves the cycling stability. Moreover, partial Al3+ substitution increases the interslab distance, providing a spacious path for Na+ diffusion and resulting in fast diffusion kinetics, which lead to improved rate capability. Consequently, the target NaNi0.25Fe0.5–xAlxMn0.25O2 sample with optimal x = 0.045 exhibits a remarkable electrochemical performance in a Na-ion cell with a large reversible capacity of 131.7 mA h g–1, a stable retention of approximately 81.6% after cycling at 1C for 100 cycles, and a rate performance of 81.3 mA h g–1 at 10C. This method might pave the way for novel means of improving the electrochemical properties of layered transitional-metal oxides and provide insightful guidance for the design of low-cost cathode materials.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Zhiyuan Su,Fan Fang,Xue Li,Wenjun Han,Xianglei Liu,Kun Chang
SrTiO 3 as a photocatalytic overall water splitting material has received extensive attention in recent years, while effectively suppressing Ti 3+ is the key to enhancing the photocatalytic performance. Herein, a polymerizable complexation method is employed to enable Al 3+ uniformly enter into SrTiO 3 lattice for reducing Ti 3+ , and substituting Ti 4+ with the formation of oxygen vacancy. Thus, the photogenerated carrier transport is promoted, and the resulting appropriate surface oxygen vacancy is also conducive to the adsorption of water molecules and OH*. The optimized 2% Al 3+ -doped SrTiO 3 possesses a lower Ti 3+ concentration, compared with the same sample prepared by the solid-phase griding method. Consequently, 2% Al-STO sample deposited co-catalysts achieves the highest activity and durability with the H 2 and O 2 evolution rates of 1.256 mmol·h −1 and 0.692 mmol·h −1 (0.04 g catalyst), respectively, corresponding to the AQE value of 55.46% at 365 nm. The characterizations and DFT calculation results reveal that the uniform Al 3+ doping promotes the increase in the surface oxygen vacancy, which is beneficial for accelerating the reduction reaction and facilitating carrier separation and migration, therefore enhancing the overall water splitting reaction.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Guiming Xie,Xingyang Bai,Yi Man,Pengju Ren,Rongrong Jin,Runduo Zhang,Kostya (Ken) Ostrikov,Zhou-jun Wang,Qingyuan Yang
Innovative catalyst design and in-depth mechanism understanding are imperative for industrialization of CO 2 hydrogenation to methanol. Herein, Al-doped Cu/ZnO catalysts, Cu/Al-ZnO-x (x = 1/32, 1/16 and 1/8, denoting Al/Zn molar ratio), were creatively synthesized using MIL-53(Al) as Al sources and reactive templates. The Cu/Al-ZnO-1/16 catalyst exhibited the highest methanol production rate among the Cu/Al-ZnO-x catalysts, which was 1.93 times as active as the conventional Cu/Al-ZnO-1/16-C catalyst using Al(NO 3 ) 3 ·9H 2 O as Al source. Structural characterizations reveal that the use of MIL-53(Al) led to higher S BET , more uniform Al distribution, more abundant oxygen vacancies, more appropriate metal-support interactions and larger amount of medium basic sites. Mechanism studies demonstrate that Al doping would markedly induce oxygen vacancy formation on Cu-ZnO interfaces and thus significantly boost methanol synthesis activity. This work offers a facile approach to develop efficient methanol synthesis catalysts and provides new insights into the nature of Al promotion in Cu/ZnO-based catalysts.
研究领域:
催化化学
·
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Suichang Ong,Huili Yang,Tu Lan,Kai Huang,Tianzheng Xie,Jinxia Zhou,Yuan Cheng,Hang Guo,Ying Zhang
Surface coating and element doping are the key strategies in LIBs development to achieve a high and stable battery performance. In this paper, ZrO 2 is directly sputtered on the Al-doped LiCoO 2 (Al-LCO) composite electrodes, enabling a controllable oxide coating on the surface of the electrode. With a sputtered coating layer of ∼6 nm, the discharging capacity of the Al doped LCO coated with ZrO 2 (Al-LCO-ZrO 2 ) is 141.04 mAh g −1 at the 100th cycle within 3.0–4.7 V at 1 C, while the Al-LCO (without coating layer) is 126.66 mAh g −1 . After 100 cycles of charging-discharging at high voltage region, the capacity retention of the Al-LCO-ZrO 2 -3 (90.7%) is also higher than the Al-LCO (75.57%). It is worth noting that, in this paper, due to the Al doping and the ZrO 2 coating, we increase the operation voltage up to 4.7 V, in which the batteries can obtain a higher energy density.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2018
·Vol. 10
·期 2
·127
·
IF 2.935
Qianni Zhang,Ruizhi Peng,Chunfu Zhang,Dazheng Chen,Zhenhua Lin,Jingjing Chang,Jincheng Zhang,Yue Hao
The aqueous-based Zn-ammine complex solutions represent one of the most promising routes to obtain the ZnO electron transport layer (ETL) at a low temperature in inverted organic solar cells (OSCs). However, to dope the ZnO film processed from the Zn-ammine complex solutions is difficult since the introduction of metal ions into the Zn-ammine complex is a nontrivial process as ammonium hydroxide tends to precipitate metal salts due to acid-base neutralization reactions. In this paper, we investigate the inverted OSCs with Al-doped-ZnO ETL made by immersion of metallic Al into the Zn-ammine precursor solution. The effects of ZnO layer with different immersion time of Al on film properties and solar cell performance have been studied. The results show that, with the Al-doped-ZnO ETL, an improvement of the device performance could be obtained compared with the device with the un-doped ZnO ETL. The improved device performance is attributed to the enhancement of charge carrier mobility leading to a decreased charge carrier recombination and improved charge collection efficiency. The fabricated thin film transistors with the same ZnO or AZO films confirm the improved electrical characteristics of the Al doped ZnO film.Keywords:organic solar cell;inverted structure;electron transport layer;Al-doped-ZnO
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Linan Xu,Zhanqiang Fang
This study successfully achieved the efficient degradation of sulfamethazine (SMT) by activating hydrogen peroxide with aluminum-doped magnetic biochar (AlMBC) as a catalyst. AlMBC was synthesized from wood sawdust using a simple impregnation pyrolysis method, and the material was characterized using various characterization techniques. The results indicated that the doping of aluminum enriched the content of oxygen-containing functional groups, increased the defect density, and provided more active sites. In the study of the degradation characteristics of SMT by AlMBC-activated hydrogen peroxide, AlMBC exhibited significant activity, achieving a degradation efficiency of up to 99.7 % within 120 minutes, which was a notable improvement compared to MBC, and the reaction rate constant was 1.6 times as that of MBC/H 2 O 2 . In the AlMBC/H 2 O 2 degradation system, the contribution rates of free radicals were in the order of 1 O 2 ＞·OH＞O 2 · - , accounting for 46.8 %, 38.6 %, and 14.6 %, respectively. Furthermore, the experiments revealed that the influence of natural organic matter and various inorganic anions on the AlMBC/H 2 O 2 system is minimal, and had strong universality. This study provides a new technical support for the application of magnetic biochar in the degradation of antibiotics.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2021
·Vol. 15
·期 2
·1310-1318
·
IF 8.897
Ullah Sami,Liu Yu,Hasan Maria,Zeng Wenwen,Shi Qitao,Yang Xiaoqin,Fu Lei,Ta Huy Q.,Lian Xueyu,Sun Jingyu,Yang Ruizhi,Liu Lijun,Rümmeli Mark H.
Graphene doping continues to gather momentum because it enables graphene properties to be tuned, thereby affording new properties to, improve the performance of, and expand the application potential of graphene. Graphene can be chemically doped using various methods such as surface functionalization, hybrid composites (e.g., nanoparticle decoration), and substitution doping, wherein C atoms are replaced by foreign ones in the graphene lattice. Theoretical works have predicted that graphene could be substitutionally doped by aluminum (Al) atoms, which could hold promise for exciting applications, including hydrogen storage and evolution, and supercapacitors. Other theoretical predictions suggest that Al substitutionally doped graphene (AlG) could serve as a material for gas sensors and the catalytic decomposition of undesirable materials. However, fabricating Al substitutionally doped graphene has proven challenging until now. Herein, we demonstrate how controlled-flow chemical vapor deposition (CVD) implementing a simple solid precursor can yield high-quality and large-area monolayer AlG, and this synthesis is unequivocally confirmed using various characterization methods including local electron energy-loss spectroscopy (EELS). Detailed high-resolution transmission electron microscopy (HRTEM) shows numerous bonding configurations between the Al atoms and the graphene lattice, some of which are not theoretically predicted. Furthermore, the produced AlG shows a CO 2 capturability superior to those of other substitutionally doped graphenes.
研究领域:
材料科学
·
物理化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Can Liu,Xinru Li,Haojie Ge,Xiaoping Yu,Yafei Guo,Tianlong Deng
The extreme pH and complex composition of radioactive wastewater pose great challenges to the chemical stability and properties of adsorbents. Herein, three kinds of metal-doped tin sulfides were developed by a simple one-pot method for cesium removal. DFT calculations combined with experiments were conducted to reveal their structures, stability, and adsorption properties. It was found that the crystal structures of tin sulfide became more stable after doping by Ni and Al. Particularly, the Al-doped material (NAlSS) exhibited the highest stability and adsorption performance because of the highest −COHP value of the Sn-S bond in NAlSS and the low binding energy between NAlSS and Cs + . The industrial application of the powdery NAlSS was further solved by wet spinning using glutaraldehyde cross-linked sodium alginate and hydroxyethyl cellulose (SHG) as the supporters. The obtained salt-resistant hydrogel fibers (SHG-NAlSS) exhibited excellent adsorption performance and stability in wide pH (2 ∼ 12) and temperature (298.15 ∼ 328.15 K) ranges. The maximum adsorption capacity reached 401.34 mg·g −1 within 10 min. The material was successfully applied for Cs + removal from wastewater, and the distribution coefficient of Cs + reached 255020.33 mL·g −1 . After 10 adsorption–desorption cycles, the adsorbent maintained good stability. These results, along with the fixed-bed adsorption, demonstrate that the developed material can be used as a candidate for Cs + removal from radioactive wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2021
·
IF 5.302
Shuang Yang,Huazhi Gu,Zhouhui Li,Ao Huang
As a promising thermoelectric material, aluminum-doped zinc oxide (AZO) exhibits high thermal conductivity , which limits its use in high-temperature thermoelectric applications. Here, we report an effective route for forming a porous architecture and nanoinclusions by introducing nano-SiC to reduce the thermal conductivity . The simultaneous formation of a porous architecture and nanoinclusions promotes enhanced phonon scattering, resulting in fairly low thermal conductivity of approximately 3.3 W⋅ m −1 ⋅ K −1 . Meanwhile, the Seebeck coefficient shows the significant improvement due to energy filtration effect caused by porous architecture and nanoinclusions. The resultant dimensionless figure of merit of approximately 0.2 at 1050 K was 1.5 times higher than that of AZO ceramic without nano-SiC, which is attributed to the combined factors of increased Seebeck coefficient and reduced thermal conductivity .
研究领域:
材料科学
·
热电材料
·
纳米结构材料
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2018
·
IF 2.751
Xing Xing Pan,Jian Xin Wang,Xiao Hui Chang,Ya Dong Li,Wan Bing Guan
A solid-liquid composite method (SLM) of Al-substituted cubic lithium lanthanum zirconium garnet (c-LLZO) was developed. Cubic LLZO powders whose composition was Li 6.23 Al 0.26 La 3 Zr 1.88 O 11.76 were prepared from the stoichiometric mixtures of lithium acetate , lanthanum oxide, zirconia and alumina , followed by an annealing of the dried precursor at 750 °C for 12 h in an air atmosphere. The resultant powders were characterized by XRD , SEM and ICP-OES. The conventional solid-state reaction methods using carbonates and hydroxides as lithium sources are also simply introduced as a comparison. In addition, the phase formation of c-LLZO powders synthesized by the ZrO 2 powders with different specific surfaces as raw material was also investigated. The results show that the cubic garnet phase LLZO powders was obtained when the value of the specific surface area (SSA) of the material ZrO 2 powder was about 110 m 2 g − 1 . Sintering these cubic phase powders at 1150 °C for 6 h in air after uniaxial pressing obtained a dense ceramic pellet with a relative density of 91.2% and ionic conductivity of 2.54 × 10 − 4 S cm − 1 at 23 °C.
研究领域:
材料科学
·
电化学
✓ 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）