Nanomaterials
·
2021
·Vol. 11
·期 9
·2177
·
IF 5.076
Easar Alam,Qiyan Feng,Hong Yang,Jiaxi Fan,Sameena Mumtaz,Farida Begum
In this study, iron oxide (Fe3O4) was coated with ZrO2, and doped with three rare earth elements((Y/La/Ce), and a multi-staged rare earth doped zirconia adsorbent was prepared by using uniform design U14, Response Surface methodology, and orthogonal design, to remove As3+and As5+from the aqueous solution. Based on the results of TEM, EDS, XRD, FTIR, and N2-adsorption desorption test, the best molar ratio of Fe3O4:TMAOH:Zirconium butoxide:Y:La:Ce was selected as 1:12:11:1:0.02:0.08. The specific surface area and porosity was 263 m2/g, and 0.156 cm3/g, respectively. The isothermal curves and fitting equation parameters show that Langmuir model, and Redlich Peterson model fitted well. As per calculations of the Langmuir model, the highest adsorption capacities for As3+and As5+ions were recorded as 68.33 mg/g, 84.23 mg/g, respectively. The fitting curves and equations of the kinetic models favors the quasi second order kinetic model. Material regeneration was very effective, and even in the last cycle the regeneration capacities of both As3+and As5+were 75.15%, and 77.59%, respectively. Adsorption and regeneration results suggest that adsorbent has easy synthesis method, and reusable, so it can be used as a potential adsorbent for the removal of arsenic from aqueous solution.Keywords:magnetic Fe3O4;uniform design;surface response methodology;multi-staged doping;arsenic (III & V) removal
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
STARCH-STARKE
·
2017
·
IF 1.837
Tao Feng,Hui Wang,Ke Wang,Yi Liu,Zhiwei Rong,Ran Ye,Haining Zhuang,Zhimin Xu,Min Sun
Flavor microencapsulation has been widely used in foods, medicines, cosmetics, and other fields. The use of amylose-based complexes is receiving increasing attention because they are biodegradable, non-toxic, and biocompatible, and these complexes provide a new way to develop and impart flavors. In this study, with the aim of investigating the properties of amylose–flavor complexes, linear aliphatic alcohols (C 6 –C 9 ) and the aromatic alcohol naphthol were used to prepare inclusion complexes by the sealed heating method in yields ranging from 45 to 50%. In addition, scanning electron microscopy (SEM), X-ray diffraction (XRD), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA) were utilized to investigate the structural characteristics of these inclusion complexes, and it was found that the amylose-n-heptanol inclusion complex was most stable. Furthermore, nuclear magnetic resonance (NMR) spectroscopy revealed that V-type crystals existed in the amylose–flavor complexes. Moreover, TGA showed that all amylose–flavor inclusion complexes have excellent thermal stability. The encapsulation efficiency of the complexes increased with decreasing chain length, but the encapsulation efficiency of the complexes with the aromatic alcohol naphthol was lower than that of the complexes with some linear alcohols. This indicated that the stereoscopic confirmation of α-naphthol may influence the complexes being formed.
研究领域:
食品科学
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Yonglei Xing,Wenbo Lv,Jie Liu,Jitao Huang
Because of the good passivation effect of PCBM on the perovskite surface, ion-migration-related phenomena are barely discussed in the inverted perovskite solar cells (PSCs). However, when applying the ZnO as electron transport material (ETM) to replace PCBM, the resulting PSC device exhibits J - V hysteresis to some extent. Here we compare the J - V performances of the inverted PSC devices using ZnO and PCBM as ETMs. We find that the use of the ZnO results in an obvious light soaking phenomenon and J - V hysteresis. While the use of PCBM leads to the elimination of the J - V hysteresis. The time-dependent photocurrent response and the capacitance-frequency ( C – F ) measurement suggest the existence of fast and slow ion migration in the MAPbI 3 film. The activation energy ( E a ) for the slow ion migration reduces under illumination, being the main reason for the J - V hysteresis for the ZnO-based PSC device. While PCBM passivates the slow ion migration, leading to the elimination of the J - V hysteresis.
研究领域:
材料科学
·
光电转换
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产品关联
DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Linzhe Xu,Yingbo Chen,Yuanyuan Zhang,Meng Wang,Siyu Wei,Xinyu Zhao
Uranium, as a radioactive element, is the source of utilizable energy for mankind in the future. Large quantities of uranium resources are contained in seawater, so uranium extraction from seawater is undoubtedly the most feasible method. However, the presence of competitive ions such as vanadium hinders the efficient extraction of uranium, which is currently a challenge that needs to be solved. Here, silane coupling agent (KH550) was grafted onto two-dimensional metal carbide (MXene). Subsequently, salicylaldoxime (SA) was deposited onto MXene particles using self-polymerization of dopamine (DA) to prepare PDA/SA deposited MXene composite grafted with KH550 (PDA/SA/MXene-KH550). The adsorbent exhibited excellent selectivity for uranium ions with a uranium/vanadium selectivity ratio of 4.8. In antibacterial experiments, the PDA/SA/MXene-KH550 composite showed excellent antibacterial performance against Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ), demonstrating the ability to adapt to complex marine microbial contamination. In addition, the maximum experimental uranium adsorption capacity of the composite was 332.3 mg/g, following the pseudo-second-order kinetic model and the Langmuir isotherm model. After five adsorption-desorption cycles, the elution efficiency of PDA/SA/MXene-KH550 for uranium can still reach 74.7 %, which demonstrated that the adsorbent had superior stability and regeneration ability, providing the possibility for actual enrichment of uranium.
研究领域:
材料科学
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环境科学
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核工程
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化学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Yang Yang,Huanxi Zhou,Zicheng Zou,Xiangjun Yang,Haijun Du
In this paper, Vanadium doped CeO 2 microsphere were synthesized using a facile hydrothermal method, and three distinct molar ratios of Ce:V precursors (15:1, 11:1 and 7:1) were investigated. The as-prepared materials were then utilized for the sensitive detection of volatile organic compounds (VOCs), specifically acetone. Results show that the V doping leads to a significant improvement in acetone response compared to the pure CeO 2 sensor. Notably, the V-doped CeO 2 sensing material with the optimal ratio of 11:1 has the highest response value of ∼12 for 100 ppm acetone at a low working temperature of 230 °C. Additionally, this sensor exhibits fast response time (15 s) and recovery time (10 s). Moreover, the V-doped CeO 2 (11:1) sensor exhibits a broad concentration range of 0.5–500 ppm for acetone detection. This material also demonstrates great cycle stability, maintaining high stability over a 60-day testing period (RSD = 0.91 %). The as-prepared V-doped CeO 2 sensor exhibits excellent sensitivity, response and recovery time, and cycle stability, making it a promising candidate for practical applications in acetone sensing.
研究领域:
材料科学
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化学传感器
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环境监测
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
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2015
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IF 1.964
Yan Li,Bing Li,Ting Chen,Zhicheng Zhou,Jun Wang,Jun Huang
A vanadium doped graphitic carbon nitride catalyst has been prepared and used for the direct hydroxylation of arenes with O 2 . Substituted arenes with electron-withdrawing groups such as CN, NO 2 , COOH, CF 3 , and COCH 3 were oxygenated to the corresponding phenols in moderate yields. The catalyst also proved applicable for the hydroxylation of aromatic halides (F, Cl, and Br) with O 2 .
研究领域:
化学
·
催化科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
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IF 9.5
Chao Sun,Bing Zhao,Ru-de Cui,Jing Mao,Ke-Hua Dai,He-Zhang Chen,Xia-hui Zhang,Jun-chao Zheng
Due to high volumetric energy density, the major market share of cathode materials for lithium-ion batteries is still dominated by LiCoO2 (LCO) at a 3C field. However, a number of challenges will be triggered if the charge voltage is increased from 4.2/4.3 to 4.6 V to further increase energy density, such as a violent interface reaction, Co dissolution, and release of lattice oxygen. Here, LCO is coated with the fast ionic conductor Li1.8Sc0.8Ti1.2(PO4)3 (LSTP) to form LCO@LSTP, while a stable interface of LCO is in situ constructed by the decomposition of LSTP at the LSTP/LCO interface. As decomposition products of LSTP, Ti and Sc elements can be doped into LCO and thus reconstruct the interface from a layered structure to a spinel structure, which improves the stability of the interface. Moreover, Li3PO4 from the decomposition of LSTP and remaining LSTP coating as a fast ionic conductor can improve Li+ transport when compared with bare LCO, and thus boost the specific capacity to 185.3 mAh g–1 at 1C. Benefited from the stable interface and fast ion conducting coating, the LCO@LSTP (1 wt %) cathode delivers a high capacity of 202.3 mAh g–1 at the first cycle (0.5C, 3.0–4.6 V), and shows a higher capacity retention of 89.0% than LCO (50.9%) after 100 cycles. Furthermore, the change of the Fermi level obtained by using a kelvin probe force microscope (KPFM) and the oxygen band structure calculated by using density functional theory further illustrate that LSTP supports the performance of LCO. We anticipate that this study can improve the conversion efficiency of energy-storage devices.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Peifeng Yu,Jie Zhan,Xiaobing Zhang,Kangwang Wang,Lingyong Zeng,Kuan Li,Chao Zhang,Longfu Li,Ying Liang,Kai Yan,Yan Sun,Huixia Luo
Exploring high-efficiency and low-cost electrocatalysts is valuable for water-splitting technologies. Recently, Si-group compounds have attracted increasing attention in electrocatalysis, considering the abundant Si-group elements on Earth. However, Si-group compounds for HER electrocatalysis have not been systematically studied. In this study, we unveil the activity trends of non-noble metal catalyst A15-type V 3 M ( i.e. , V 3 Si, V 3 Ge, and V 3 Sn) superconductors and show that V 3 Si is the most efficient HER catalyst because of the high electronic conductivity and suitable d -band center. Among them, the V 3 Si only requires 33.4 mV to reach 10 mA cm −2 , and only 57.6 mV and 114.6 mV are required to attain a high current density of 100 mA cm −2 and 500 mA cm −2 , respectively. These low overpotentials are close to the 34.3 mV at 10 mA cm −2 of state-of-art Pt/C (20 %) but superior to 168.5 mV of Pt/C (20 %) at 100 mA cm −2 . Furthermore, the V 3 Si illustrates exceptional durability with no obvious decay in the 120 h at the different current densities ( i.e. , 10–250 mA cm −2 ). The excellent HER activity of V 3 Si alloy can be ascribed to the synergies of superior electronic conductivity and suitable d -band center. Moreover, DFT calculations reveal that |ΔG H* | is decreased after introducing the V to Si. Beyond offering a stable and high-performance electrocatalyst in an acidic medium, this work inspires the rational design of desirable silicide electrocatalysts .
研究领域:
材料科学
·
电催化
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Shiyou Wu,Tongxing Lei,Zhiyu Ding,Jun Wei,Junwei Wu
Lithium cobalt oxide (LCO) cathode materials could deliver about 220 mAh/g when operated at 4.6 V. However, high-voltage LCO materials still endure detrimental interfacial side reactions and serious structural degradation, leading to severe performance deterioration. Herein, we have proposed a facile strategy that utilizes good-wettability LiPO 3 and ionically conductive Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP) to successfully construct a highly stable Li 3 PO 4 layer and a well-matched transition layer (such as Co 2 TiO 4 and LiCoPO 4 ) on the surface of LCO material. The designed multifunctional coating can not only suppress the oxygen release and electrolyte decomposition but also facilitate Li + diffusion kinetics. As a result, the modified LCO exhibits superior cycling stability over 200 cycles at 4.6 V, with excellent capacity retentions of 79.24 % at room temperature and 79.45 % at high temperature of 45 ℃. Besides, the modified LCO realizes a reversible discharge capacity of 178.42 mAh/g at 3C (1C = 200 mA/g) over 300 cycles. This work provides a practical reference for mass-production of high-voltage LCO with long lifespan and high-rate capability.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2016
·
IF 2.331
Jian Wang,Shuhui Yu,Suibin Luo,Baojin Chu,Rong Sun,Ching-Ping Wong
Nonlinear current–voltage ( I – V ) behavior is a typical feature of polymeric composites containing conductor or semiconductor fillers, which are desired to handle the transient voltage and electrostatic discharge (ESD) of microelectronic devices. In this paper, the mechanism of nonlinear behavior of carbon nanotubes (CNTs) filled polymer composites in the applied electric field was explored. The I – V curves of the composites exhibited three regions. The variation of current at low voltages (region I) is linear. Under relatively higher voltages (region II), the variation is nonlinear and grows rapidly with voltage. As the voltage is further increased, the I – V curve is still non-linear (region III), but the growth rate is significantly slowed down. The I – V characteristics in the above three regions were analyzed systematically based on the calculation of the electrons hopping from the conduction band of CNTs to epoxy, the induced current under electric field, as well as Joule-heating and tunneling effect.
研究领域:
材料科学
·
纳米复合材料
·
电学性能
·
聚合物物理
·
电子材料
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2019
·
IF 5.026
Tao Wang,Xiqing Liu,Donglai Han,Changchang Ma,Maobin Wei,Pengwei Huo,Yongsheng Yan
This work focused on the utilization of biological extract for the preparation of lignin-based carbon composites materials and used in the field of photocatalysis . A straightforward one-step carbonization way has been developed to prepare vanadium-doped lignin-based carbon/Bi 2 O 3 composites photocatalyst by using sodium lignosulfonate as the carbon source and catalyst. The application of lignin as the carbon source to form photocatalyst support tends to control the uniform distribution. At the same time, sodium lignosulfonate as the catalyst could break down the BiVO 4 during carbonization process. A series of characterizations demonstrated the BiVO 4 was transformed into Bi 2 O 3 and vanadium-doped lignin-based carbon. The possible synthesis process was proposed. Moreover, the novel V-doped carbon/Bi 2 O 3 composites photocatalyst displayed higher photocatalytic activity than bare BiVO 4 . A possible photocatalytic mechanism was also discussed. This work provided new insight into the lignin-based carbon materials.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 29
·19965-19974
·
IF 3.9
Lei Sun,Zhenzhen Wang,Mengxi Zang
In view of the characteristics of high temperature denitrification and low water and sulfur resistance of single manganese-based catalysts, a vanadium–manganese-based ceramic filter (VMA(14)-CCF) was prepared by the impregnation method modified with V. The results showed that the NO conversion of VMA(14)-CCF was more than 80% at 175–400 °C. At 225–300 °C, the conversion of NO can reach 100%. High NO conversion and low pressure drop can be maintained at all face velocities. The resistance of VMA(14)-CCF to water, sulfur and alkali metal poisoning is better than that of a single manganese-based ceramic filter. XRD, SEM, XPS and BET were further used for characterization analysis. The introduction of V protects the MnOx center, promotes the conversion of Mn3+ to Mn4+, and provides abundant surface adsorbed oxygen. The development of VMA(14)-CCF greatly broadens the application range of ceramic filters in denitrification.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）