RSC Advances
·
2016
·Vol. 6
·期 72
·67827-67832
·
IF 3.289
W. X. Chen,J. S. Yu,W. Hu,Z. L. Chen,H. Memon,G. L. Chen
A core/shell heterostructured nanonanocomposite catalyst based on NiO nanoflakes and titanate nanowires (TNWs) was fabricated. The experimental results showed that the precursor concentration and the reaction time for NiO deposition played significant roles in determining the resulting heterostructure, and an optimal precursor's concentration would result in a well-defined core/shell heterostructure. The XRD analysis demonstrated the existence of the (1 1 1), (2 0 0) and (3 1 1) lattice planes of the NiO nanoflakes. Nearly 100% of the MB pollutant (10 mg L−1) was photodegradaded by the TNWs/NiO catalyst within 50 minutes under UV light irradiation.
研究领域:
材料化学
·
环境催化
·
纳米材料科学
·
光催化降解
·
功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Xingliang Chen,Yan Wang,Hailing Liu,Shu Jin,Guanglei Wu
The applications of cobalt ferrite and nickel ferrite composite materials on electromagnetic (EM) wave absorption are the research hotspot currently. However, the systematical comparison study between these two ferrites composites have rarely been carried out. Thus, the EM wave absorption performance of interconnected carbon@Ni x Co 1-x Fe 2 O 4 composites with core–shell structures were investigated comprehensively in this work. A series of magnetic nanospheres including NiFe 2 O 4 , cobalt-doped nickel ferrite, nickel–cobalt ferrite, nickel-doped cobalt ferrite and CoFe 2 O 4 were synthesized firstly, and then uniformly encapsulation by carbon rendered the corresponding C@Ni x Co 1-x Fe 2 O 4 composites nanospheres. Synthesis reactions involved for C@Ni x Co 1-x Fe 2 O 4 formation were investigated in detail, and afterwards their magnetic behavior, EM wave absorption performance and absorbing mechanism were thoroughly explored and analyzed. Results show that when nickel is dominant element and cobalt is doping element (Ni 0.75 Co 0.25 Fe 2 O 4 ), the composite nanosphere exhibits optimum EM wave absorption performance. When the sample thickness is just 1.9 mm, its RL min value can reach −51 dB, and the corresponding EAB width is 3.3 GHz. The synthesized C@Ni 0.75 Co 0.25 Fe 2 O 4 can be qualified as an efficient and thin electromagnetic wave absorber, which is mainly attributed to its special structure, fair electromagnetic matching and impedance matching.
研究领域:
材料科学
·
电磁学
·
纳米材料
·
功能材料
·
复合材料工程
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Yaoliang Huang,Yunru Zhang,Guizhi Yuan,Dingshan Ruan,Xinlong Zhang,Weijian Liu,Zhongshuai Zhang,Xiaoyuan Yu
Ni/Mn-based layered oxides have been widely studied for sodium ion battery cathode because of high capacity and simple preparation. However, its application has been restricted owing to unstable structure and poor cycling performance. Herein, the multi-element doped hexagonal sheet Ni/Mn-based layered oxide with ZrO 2 surface modification O3-NaNi 0.3 Mn 0.5-x Fe 0.1 Cu 0.1 Zr x O 2 @ZrO 2 (NFMCZ-x) cathode materials have been successfully synthesize by high temperature calcination method accompanied by ball milling activation. XRD refinement results show Zr 4+ substitution of Mn 3+ can increase interlayer distance of sodium layer. Benefiting from the synergetic effect of multi-element doping and ZrO 2 surface modification, the optimized NFMCZ-0.03 sample exhibits a higher discharge capacity of 178 mAh/g at 0.1C and good capacity retention (77 % after 50 cycles at 2C). Furthermore, NFMCZ-0.03 has an excellent air stability with a capacity retention rate of 86 % during 50 cycles at 1C after being exposed in the air for 20 days. The ex-situ XRD results of NMFC at different charge/discharge voltages show Zr 4+ doping can suppress O3 + P3′'–O3′-O3 + P3′' phase transition during charge/discharge process. These results confirm that synergistic effect of multi-doping combined with surface modification can improve electrochemical performance of layered oxides cathodes, which provides a research idea for development of Ni/Mn-based layered oxides cathodes for sodium-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
固态化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Tao Zhang,Zhiyuan Ling
Architecture construction of electrode is one key factor for hydrogen generation from electrochemical water splitting. To enhance the efficiency of oxygen evolution reaction (OER) at high current density , the architecture construction must be designed skillfully to prevent the surface blanketed by gas bubbles. In this work, we developed a three-level hierarchical surface with cluster-like nickel (Ni) nanowire array. The contact angle measurement indicates the surface having excellent hydrophilicity . The OER performance characterization reveals that after the surface is loaded with NiFe-based catalyst the Ni nanowire array electrode can deliver 500 mA cm −2 at an overpotential of 297 mV in 1 M KOH solution and can survive for over 24 h under 500 mA cm −2 operation. All the results demonstrate that the cluster-like nanowire array is beneficial for the spatial pathway separation for electrolyte supply and gas bubbles departure and the enhancement of OER efficiency.
研究领域:
材料科学
·
电化学
·
能源材料
·
纳米技术
·
催化化学
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2019
·
IF 2.781
Yunjiao Li,Shilei Wang,Yongxiang Chen,Tongxing Lei,Shiyi Deng,Jie Zhu,Jinping Zhang,Jia Guo
Cadmium oxides (CdO), an important semiconductor material , have many superior properties when used as a cathode material for nickel-cadmium batteries. Here, the coating and the doped co-modified LiNi 0.8 Co 0.15 Al 0.05 O 2 cathode are constructed by a continuous wet chemical process and a high-temperature sintering process, wherein the Cd 2+ are uniformly doped in a gradient form and the CdO protective layer is distributed on the outer surface of secondary particles. The Cd-modified NCA material has more stable interfacial and crystal lattice structure, thereby inhibiting harmful phase transitions and side-reactions. Accordingly, the modified sample has excellent electrochemical performance and maintaining a complete spherical morphology during long cycling compared to the pristine sample. In addition, as a pillar ion, cadmium increases the plate spacing and lithium-ion diffusion kinetics. The electrochemical results show that the capacity retention of the modified sample Cd-2000 reached 96.5% and 90.6% after 100 cycles and 200 cycles respectively at 1 C. At the high current rate of 8 C, the initial capacity and retention (100 cycles, 3.0–4.3 V) reach 166.2 mAh g −1 and 95.2%, respectively. Besides, the results of electrochemical impedance spectroscopy (EIS) reveal that CdO modification could decrease the resistance of the cell polarization and impedance increment upon cycling.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
半导体材料
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 24
·9628-9633
·
IF 3.069
Alam Venugopal Narendra Kumar,Shuli Yin,Ziqiang Wang,Xiaoqian Qian,Dandan Yang,You Xu,Xiaonian Li,Hongjing Wang,Liang Wang
The shape-controlled synthesis of bimetallic Pt-based nanoarchitectonics has attracted considerable interest due to their remarkable electrocatalytic activity for the oxygen reduction reaction (ORR). In this work, we report a direct method for the fabrication of unique bimetallic AuPt nanobrick spherical nanoarchitectonics (AuPt NSNs) in aqueous solution. Benefiting from their rugged surfaces and bimetallic compositions, AuPt NSNs exhibit excellent electrocatalytic performance for the ORR. The proposed method is very useful for the fabrication of metallic nanoarchitectonics with rugged surfaces.
研究领域:
纳米材料学
·
电化学
·
催化化学
·
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2018
·
IF 5.123
Feng Tan,Xiao Jiang,Xianliang Qiao,Daming Sun,Jinsuo Gao,Xie Quan,Jingwen Chen,Suyu Ren,Yi Wang
A diffusive gradients in thin films (DGT) method using a new high-capacity cerium oxide (CeO 2 ) binding gel, for the first time, was developed for measuring dissolved inorganic arsenic in freshwater and seawater . The capacities of the new CeO 2 binding gel were 682 μg and 375 μg for As III and As V , respectively. The masses of As III and As V accumulated by CeO 2 -DGT device increased linearly with time and agreed well with the theoretical value calculated by DGT equation. The arsenic accumulation by CeO 2 -DGT was independent of pH (4.05–9.04) and ionic strength (0.1–750 mM), and common anions including CO 3 2− , SO 4 2− , Cl − and PO 4 3− had no obvious interference. CeO 2 -DGT showed excellent long-term deployment performance in freshwater and synthetic seawater . Field trials with CeO 2 -DGT achieved successfully the time-weighted-average concentrations of total inorganic arsenic in reservoir water (1.38 ± 0.09 μg/L) and coastal seawater (0.45 ± 0.06 μg/L). The results were comparable to those measured by grab sampling. The proposed method was reliable and robust for in-situ measurements of dissolved inorganic arsenic in environmental waters.
研究领域:
环境化学
·
分析化学
·
水环境监测
·
环境地球化学
·
污染生态学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2018
·
IF 4.732
Chengwei Xu,Wenxia Xie,Xiaodong Si,Jun Zhang,Jiangang Yang
A TiO 2 /MWCNTs/Al 2 O 3 /NF (TiO 2 nanoparticles/multi-walled carbon nanotubes /Al 2 O 3 -modified nickel foams) composite filter was prepared through grown of MWCNTs upon Al 2 O 3 -modified nickel foams using chemical vapor deposition (CVD) method and then coated TiO 2 nanoparticles onto MWCNTs using dip-coating method. The MWCNTs forms a network-like structure on the surface layer of composite filter. The BET surface area of TiO 2 /MWCNTs/Al 2 O 3 /NF composite filter is more than 375 times higher than that of the pristine nickel foam. The degradation performance of oil particles was evaluated. Under optimized reaction conditions, 90% of the oleic acid on the filter was decomposed after 25 h. In addition, the effect of reaction temperature and light intensity were studied. Increased reaction temperature and light intensity were found to significantly improve the degradation rate and restrain the formation of refractory product. Furthermore, a parallel reaction kinetic model was adopted for degradation of oleic acid on the composite filter. The composite filter can reduces the accumulation of oil particles on the filter and the energy consumption of the filter. This approach proposes a new way to treat the cooking fume emission at residential building roofs.
研究领域:
环境科学
·
材料科学
·
化学工程
·
大气污染控制
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Huicai Xie,Quanyi Liu,Xiaohua Luo,Shengcan Ma,Xinqiang Gao,Zhenxing Li,Zhaojun Mo,Jun Shen
For more practical applications, research on magnetic refrigeration has been gradually focused on developing refrigerants with large magnetocaloric effect (MCE) under low magnetic fields (≤2 T). EuTiO 3 exhibits considerable low-field MCE near ordering temperature, meanwhile the magnetic switch from antiferromagnetic to ferromagnetic (AFM-FM) in it provides the feasibility of improving the magnetocaloric performance. In this study, a series of Eu(Ti,Nb,M)O 3 (M=Cu or Zn) compounds were synthesized, and the crystal structure, magnetic properties together with cryogenic MCEs were investigated in detail. The co-substitution contributes to an FM coupling domination in all the compounds. Besides, significantly enhanced and giant low-field MCEs were detected in these compounds. Under the field change of 1 T, all the samples possess remarkable magnetic entropy change (>15 J·kg -1 ·K -1 ) around 5 K without hysteresis. The corresponding refrigerating capacities are calculated to be 68.0, 72.6, 76.0, and 69.6 J·kg -1 , respectively, exhibiting an increase of 149–178% than EuTiO 3 . The outstanding magnetocaloric performances make the Eu(Ti,Nb,M)O 3 (M=Cu or Zn) compounds competitive candidates for cryogenic magnetic refrigeration.
研究领域:
材料科学
·
凝聚态物理
·
功能材料
·
低温工程
·
磁学
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Hao Lei,Daohui Zhou,Jiao Tang,Xiaoping Hu,Ning Pan,Hao Zou,Fangting Chi,Xiaoqiang Wang
A novel approach to synthesize phytic acid (PA) functionalized graphene oxide (P-pFGO-7) treated by the photo-Fenton reaction has been designed, which has been used as an adsorbent for efficient capture of U(VI) from aqueous solution. The structure and morphology of P-pFGO-7 were characterized well. The adsorption property for P-pFGO-7 was comprehensively assessed by batch experiments, showing the high adsorption capacity (266.7 mg/g, at pH = 4.0, T = 298 K), fast adsorption kinetics (~10 min), good selectivity for U(VI) and Ln-An ions in various coexisting ions and excellent regeneration capacity. With the assistance of various characterization techniques and batch adsorption results, it is found that PA makes the most contribution to coordinate U(VI) heavily depending on the P O moiety. P-pFGO-7 could be regenerated by 0.1 mol/L Na 2 CO 3 with ~95% desorption efficiency and reused well after five recycles. This present work provides a feasible route to modify graphene oxide and extend PA for potentially practical application in the removal of U(VI) from radioactive wastewater .
研究领域:
环境化学
·
核科学与技术
·
材料科学
·
水处理技术
·
放射化学
·
纳米材料
·
吸附科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·Vol. 49
·期 11
·18776-18785
·
IF 5.2
Jiaxu Cheng,Siwei Jiang,Jiahong Fan,Jun Yao,Ning Du,Xue Li,Ding Wang,Peng Dong,Zhongren Zhou,Yingjie Zhang
Molten salt electrolytic synthesis of silicon is identified as a potential industry method due to its thorough deoxidization of oxide and short-flow synthetic progress. However, figuring out a more efficient and sustainable strategy for the increase of the reduction process as well as the control of product morphology still needs endless research. In this study, benefiting from the high electrical conductivity of metallic silver and the easy separation of silver from silver-silicon alloys during the electrolysis of SiO 2 , metallic silver was introduced to electric-catalyze the production of silicon. Firstly, metallic silver was introduced into the silica matrix by a simple silver mirror reaction. Secondly, the mixed Ag\SiO 2 precursor was located at the cathode for molten salt electrolysis . Finally, silicon nanowires were herein achieved in molten NaCl–CaCl 2 . Mechanisms of metal Ag played during the electric-polarization process of silica and the electrochemical nucleation of silicon were further analyzed by X-ray diffraction (XRD), Scanning Electron Microscope (SEM), Field-Emission Scanning Electron Microscope (FESEM), Transmission Electron Microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and Raman spectra . The results demonstrate that Ag helps construct Si nanowires via a classic Ag-Si binary alloy-droplet process and provided quantitative guidance for the large-yield production of silicon nanowires via adding 0.08–0.17 g Ag versus 1 g SiO 2 , controlling the temperature at 850–900 °C and electrolysis voltage at 2.6–2.8 V (2.6V at first 1 h and 2.8V at last 5 h). The synthesized silicon nanowires present two types of linear structures based on two three-phase interlines (3PIs) models and a streamed long-straight nanowire is observed.
研究领域:
材料科学
·
纳米科技
·
电化学
·
无机化学
·
能源材料
·
半导体材料
✓ 已验证
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2019
·
IF 3.834
Xiao Wang,George Q. Chen,Wei Zhang,Huining Deng
The development of reliable anion exchange membranes (AEMs) with superior antifouling properties is critical in practical applications of electrodialysis processes. For the first time, the AEMs were modified by poly (sodium 4-styrene sulfonate) (PSS) with titanium dioxide (TiO 2 ) nanoparticles using only one electrodeposition step to stabilize the nanoparticles on the membrane surface while improving their antifouling ability. Owing to the bonding between the sulfonic groups of PSS and TiO 2 , the TiO 2 nanoparticles were well dispersed in the modified layer. The deposition of PSS endowed the AEMs with a negatively charged surface, while the addition of TiO 2 nanoparticles further increased the charge density. The membrane resistance increased only marginally after 100-min of fouling experiments using sodium dodecyl benzene sulfonate (SDBS), due to the presence of TiO 2 on the modified AEMs. Ultraviolet (UV) irradiation was proven to be an effective approach in inducing good fouling reversibility of the TiO 2 -PSS modified AEMs through photocatalytic decomposition and hydrophilicity improvement.
研究领域:
膜科学
·
环境工程
·
材料化学
·
电化学
·
水处理技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）