FUEL
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2023
·
IF 7.4
Muhammad Yousaf,Yuzheng Lu,Majid Niaz Akhtar,Ali Sarosh Khawaja,Khalid Mujasam Batoo,Sajjad Hussain,Asma Noor,Muhammad Akbar,Hu Enyi,M.A.K Yousaf Shah,Naveed Mushtaq,Bin Zhu
Lattice defects in rare earth (RE) doped single-phase semiconductor materials play a key role in structural modifications and physicochemical characteristics, resulting to enhance the ionic conductivity. In this work, we synthesized lanthanum doped samarium oxide with different mole ratios and applied it as a ceramics membrane fuel cell device to enable high peak power density (PPD) at low operational temperatures (520–400 °C). The samples are capable of triple charge H + /O 2− /e − conduction and enhance the catalytic function of the cell in terms of HOR and ORR kinetics by producing lattice defects. The fabricated Sm 1.5 La 1.5 Fe 5 O 12 (2-SLFO) fuel cell device exhibits a high OCV of 1.13 V with a maximum PPD of 864.26 mW/cm 2 at 520 °C. Durability measurement verifies that 2-SLFO-based fuel cell device can be worked for 60 h under fuel cell conditions (H 2 /air) at 520 °C. The first principle calculations using density functional theory (DFT) demonstrate that the higher oxygen vacancy concentration in the 2-SLFO sample may cause to the higher charge-transfer kinetics, subsequent in the enhancement of ions transportation of the fabricated fuel cell device.
研究领域:
材料科学
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电化学
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能源材料
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固态离子学
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燃料电池技术
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Lidan Xie,Wenyi Huang,Guoqiang Jiang,Yi Liu,Mude Zhu,Yi Tang,Xueqin Chen,Xiaoyun Fan
The wide occurrence of metronidazole (MNZ) in aquatic environment has aroused increasing concern to the potential adverse effects on human health. Combining different motifs into a photolytic material to achieve high photocatalytic efficiency is regarded as one of the main strategies during photocatalytic process. Herein, a triple anions contained photocatalyst , Ba 3 (BO 3 )(CO 3 )F (BBCF), exhibited excellent removal efficiency of MNZ (92.6%) in 15 min, which was 5.87 times higher than that of commercial P25. The excellent removal efficiency could be attributed to the strong electronegativity of the F − , and the π-conjugated triangles structure of (BO 3 ) 3− and (CO 3 ) 2− , which made BBCF facilitate the transport of photogenerated electrons, thus accelerating the accumulation of active h + . Meanwhile, the appropriate reduction potential of BBCF accounted for the outstanding productivity of O 2 – . h + and O 2 – were proved as the dominant reactive species for MNZ degradation. The degradation products were analyzed by LC-TOF-MS, and the toxicity of the intermediate was evaluated to be lower than that of parent MNZ molecule. Moreover, BBCF showed the universal application of degrading oxytetracycline (OTC), methylene blue (MB). Therefore, anion-rich BBCF catalyst with high catalytic activity has a potential application prospect for degrading harmful pollutants in practical water environment.
研究领域:
环境科学
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材料科学
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化学工程
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 27
·12146-12152
·
IF 2.7
Henan Zhang,Qi Liu,Alena Novoselova,Valeri Smolenski,Kewei Jiang,Yongde Yan,Milin Zhang,Jun Wang
The reactions of oxygen and samarium ions in molten NaCl–2CsCl eutectic in the temperature range of 823–913 K have been investigated by potentiometric titration in an inert gas atmosphere. The activity of oxygen ions in the studied melts was monitored using a standard YZME (indicator) electrode based on Y2O3-stabilized ZrO2 with a solid–electrolyte membrane. The titration of Sm3+ by O2− ions demonstrated the formation of insoluble SmOCl compounds in the investigated region. The mechanism of formation of SmOCl and Sm2O3 was established by the analysis of potentiometric titration curves. Subsequently, the solubility of SmOCl and Sm2O3 in the melt was calculated using the material balance equation and solubility constant equation. Finally, the basic thermodynamic properties of SmOCl and Sm2O3 in molten NaCl–2CsCl eutectic were calculated, and the properties of samarium in the melt were summarized using the Pourbaix-type (E-pO2−) diagram to determine the kinds of stabilized samarium compounds. Furthermore, the optimal chlorination conditions can be obtained from the E-pO2− diagram of Sm.
研究领域:
化学
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材料科学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Zhengyi Qian,Xudong Li,Liguang Wang,Tianpin Wu,Baoyu Sun,Lei Du,Yulin Ma,Chunyu Du,Pengjian Zuo,Geping Yin
Rechargeable aprotic Li–O2 batteries have drawn much attention in light of their ultrahigh theoretical energy density. However, the sluggish kinetics of oxygen cathode reactions lead to huge energy loss, while the unfavorable side reactions associated with the widely used carbon and binder account for fast battery decay during cycles. Herein, hierarchically holey IrNi alloy nanosheets are facilely designed on Ni foam substrate as a freestanding, binder- and carbon-free cathode to address these challenges. The IrNi nanosheets consist of numerous interconnected nanoparticles, forming abundant nanoholes, benefiting active-site exposure. Moreover, the meso-/macropores pave channels for the transfer of oxygen and lithium ions and provide enough accommodation for the insoluble Li2O2 product. The corresponding Li–O2 batteries demonstrate low polarization and excellent cycle stability with full discharge/charge capability (up to 292 cycles at a current density of 0.2 mA cm–2 within a voltage range from 2.3 to 4.3 V). The long-term cycling performance is principally attributed to the exclusive catalytic stability of the holey IrNi nanosheets and its good compatibility with dimethyl sulfoxide-based electrolyte. Our research provides novel insights into the design of robust and freestanding porous cathodes for high energy density Li–O2 batteries.
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高影响因子
ACS Applied Energy Materials
·
2020
·
IF 4.473
Jia Liu,Ying Wang,Dan Zhou,Dan Li,Ziye Kang,Haiming Xie
Although a redox mediator (RM) strategy can lower the overpotential of Li–O2 batteries (LOBs), the redox shuttling results in an undesired RM consumption and a continued decomposition of lithium metal anode, leading to a poor cycling stability. In this work, a hybrid inorganic–organic composite separator based on polyethylene oxide/TiO2/polypropylene (PEO/TiO2/PE) in LOBs has been reported for the first time, which aims to suppress the RM shuttling. The influences of TiO2 nanoparticles and PEO on battery performance are systematically investigated. Benefiting from the synergistic advantages, a LOB with PEO/TiO2/PE separator displays stable cyclability, considerable rate performance, and good reversibility. Additionally, the mechanism of inhibiting shuttling effect by this composite separator is proposed. We hope that this work can give an insight into the development of multiple functional separators for Li anode protection in LOBs.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Yong Liu,Ni Tan,Jinrui Guo,Jianlong Wang
In this study, a novel Al°-CNTs-Cu 2 O composite, capable of activating O 2 to generate H 2 O 2 and further to reactive oxygen species (ROSs) at a wide pH range, was synthetized, characterized and applied for the degradation of sulfamerazine. In the activation of O 2 by Al°-CNTs-Cu 2 O composite, H 2 O 2 was generated from the reaction of O 2 with Al°-CNTs, which could be catalytically decomposed into O 2 − and OH by Cu 2 O, the formed Cu(II) could be rapidly reduced to Cu 2 O by Al°-CNTs in composite, which made Al°-CNTs-Cu 2 O composite reusable and decreased the leaching of copper ions into solution. The removal efficiency of SMR and TOC was 73.91 % and 56.80 %, respectively at initial pH = 5.8, T = 20 °C, O 2 flow rate = 100 mL/min, Al°-CNTs-Cu 2 O dosage = 2 g/L, SMR = 50 mg/L, and reaction time = 60 min. The removal efficiency of SMR kept almost unchanged and the concentration of copper ions in solution was below 0.5 mg/L. The Al°-CNTs-Cu 2 O/O 2 process could be used as a novel catalyst for the degradation of refractory organic contaminants in water and wastewater by Fenton-like process at a wide pH range through the in situ generation of H 2 O 2 .
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DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 19
·9813-9824
·
IF 11.301
Yue Li,Jian Song,Mengting Jiang,Mbage Bawa,Xiaohong Wang,Yuyang Tian,Guangshan Zhu
Na5[IMo6O24]·3H2O and a porous aromatic framework (iPAF-1) were used to build an off-the-shelf building material (IMo6@iPAF-1) to realize the highly efficient oxidation of organic sulfurs like oxygenase. The synergy between IMo6 and iPAF-1 resulted in a higher BET surface area, hydrophobic microenvironment, and redox sites to show higher activity in aerobic oxidative desulfurization with almost 100% removal of model organic sulfurs under atmospheric pressure with almost 246 times higher TOFs compared to IMo6. It also showed efficiency in the desulfurization of gasoline and diesel to give very low S contents of 7.1 and 7.6 ppm with 99.3% and 99.4% removal, respectively, at 100 °C for 6 h. More importantly, IMo6@iPAF-1 could also catalyze desulfurization using concentrated O2 mixed with N2 or air instead of pure O2 with better safety and economics, while as low as 4.9 and 6.9 ppm S contents were achieved for gasoline and diesel, respectively. The special surroundings of IMo6@iPAF-1 repelled the sulfone product and allowed it to perform with the same efficiency when recycled without any treatment of the used catalyst.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 27
·11808-11816
·
IF 3.288
Shi-Yuan Zhang,Jing-Jing Ma,Hong-Lin Zhu,Yue-Qing Zheng
Syngas, as a necessary feedstock dependent on non-renewable fossil fuels, is a mixture of CO and H2, which could be prepared by a renewable strategy via electrochemical CO2 reduction in water electrolyte solutions. Herein, beaded Au@Co3O4 nanowire arrays (denoted as Au@Co3O4 NAs) were obtained by immersion in HAuCl4 solution with Co3O4 nanowire arrays. The Au@Co3O4 NAs exhibited outstanding electrochemical performance of producing syngas via tuning from 1 : 1 to 4 : 1 with controlling voltage. In addition, the Au@Co3O4 NAs showed better catalytic performance for the oxygen evolution reaction with an overpotential of 320 mV at a current density of 50 mA cm−2, along with a small Tafel slope of 75 mV dec−1 in 1 M KOH solution. The electrochemical performance of Au@Co3O4 NAs is obviously superior to Co3O4 NAs, which will open up a viable strategy for the design and fabrication of a bi-functional electrocatalyst for the overall reaction (CO2 + H2O → CO + H2 + O2).
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Journal of Materials Chemistry A
·
2015
·Vol. 4
·期 4
·1399-1407
·
IF 7.443
Guangyu Zhao,Li Zhang,Jixian Lv,Changle Li,Kening Sun
Hydrothermal self-assembly is a highly efficient and low cost method to prepare graphitic foam from graphene oxides; however, the self-assembly frameworks usually do not have controllable pore structures because of the spontaneous process. In this paper, a hydrothermal synthesis assisted by ammonium peroxo-polymolybdate [(NH4)2Mo2O11] tailoring to fabricate graphitic foam is presented. The foam possesses pore structures which can be controlled by adjusting the rate of charge in the hydrothermal experiments. Furthermore, the foam obtained from a definite rate of charge [(NH4)2Mo2O11 : graphene oxide is 1 : 2 in weight] has a hierarchical pore structure and a through-hole net. In electrochemical energy storage, such unique features are beneficial for providing efficient mass transport as well as abundant, accessible active sites. The graphitic foam was tested for use as self-supported electrodes of Li–O2 batteries (LOBs) and Li ion batteries (LIBs) without any metallic current collectors or organic binders, and the foam frameworks exhibited remarkable lithium ion storage properties in both of the two batteries (e.g., 5500 mA h g−1 at 0.2 A g−1 as LOB cathodes and 250 mA h g−1 at 50 A g−1 as LIB anodes).
研究领域:
材料科学
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能源技术
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高影响因子
ACS Applied Bio Materials
·
2023
·
IF 4.7
Wen-Xing Zhang,Ze-Lei Zhou,Qi-Yan Lv,Xiejie Song,Junyang Chen,Chang-Bin Niu,Hui-Fang Cui
Cancer starvation/photothermal combined tumor therapy (CST/PTT) has attracted great interest attributed to their mutual compensation and synergistically enhanced effect. However, the very low O2 supply in the tumor microenvironment (TME) greatly limits the CST efficiency of glucose oxidase (GOx). Additionally, the easy degradation in blood circulation and significant off-target effects are big challenges for clinical applications of the GOx-based CST. In this study, a drug delivery system (DDS) with specific tumor-targeted GOx delivery, near-infrared (NIR) light and TME responsive O2 generation, NIR-responsive glucose consumption, high GOx loading, and efficient NIR photothermia was developed. Positively charged AuNRs@MnO2@SiO2 nanoparticles (named AMS+ NPs) were synthesized. GOx was covalently loaded with a high loading ratio of 36.0%. Finally, a thermosensitive biomimetic hybrid membrane composed of a thermosensitive lipid (TSL) membrane, red blood cell membrane (RBCM), and 4T1 cancer cell membrane (CCM) was coated on the NPs through a double-layer strategy. The AMS+-G@TSL@[RBC-CC-TSL]M NPs consumed 32.7 times glucose at 50 °C as that at 37 °C and generated 4.9 times O2 upon NIR laser irradiation. The thermosensitive biomimetic NPs showed an efficient targeting capability to the homotypic 4T1 cancer cells/tumors accompanied by good biocompatibility, macrophage evading capability, high cancer cell cytotoxicity, and excellent antitumor efficacy. The tumor growth inhibition ratio with NIR laser irradiation reached 92.8%. The AMS+-GOx@TSL@[RBC-CC-TSL]M NPs provide a smart, efficient, safe, PTT/CST combined DDS for highly efficient tumor therapy.
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DOI
PubMed
高影响因子
RARE METALS
·
2023
·Vol. 42
·期 6
·1969-1982
·
IF 8.8
Liao Jia-Lin,Zhang Shuai,Bai Tian-Sheng,Ji Feng-Jun,Li De-Ping,Cheng Jun,Zhang Hong-Qiang,Lu Jing-Yu,Gao Quan,Ci Li-Jie
Lithium metal batteries (LMBs) with a high theoretical capacity are seen as a type of the most potential energy storage system. Unfortunately, the growth of lithium dendrite, the irreversible side reactions, and the infinite volume alteration still curb the practical utilization of lithium metal anodes, resulting in low Coulombic efficiency (CE) and safety problems, etc. Herein, we synthesize a lithiophilic 3D copper foam host with uniformly distributed nano-flower-like ZnO particles (CuF/ZnO) and obtain the composite lithium metal anode containing the Li 2 O, LiZn alloy, and pure Li by the infusion of molten Li (CuF/Li 2 O-LiZn@Li). Benefitting from the advantages of the 3D structure of copper foam and the lithiophilicity of ZnO sites, the composite lithium metal anode can restrain the volume alternation and regulate the uniform deposition of lithium. The symmetrical cells of the composite lithium metal anode have a 1600 h long cycle life with a low polarization voltage of 15 mV, and the Coulombic efficiency can maintain about 97.8% at 1.0 mA·cm −2 , 1.0 mAh·cm −2 . Graphical abstract
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高影响因子
Catalysts
·
2023
·Vol. 13
·期 3
·577
·
IF 3.9
Lu Zou,Weilin Kong,Linfeng Peng,Fang Wang
The development of Li-CO2/O2battery with high energy density and long-term stability is urgently needed to fulfill the carbon neutralization and pollution-free environment targets. The biomass-derived heteroatom-doped carbon catalyst with the combination of high-efficiency catalytic activity and sustainable supply is a promising cathode catalyst in Li-CO2/O2battery. Specifically, the unique morphology and mesopore structure can promote the transfer of CO2, O2, and Li+. Abundant channel pores can provide discharge products accommodation to the largest extent. Nitrogen dopant, the commonly recognized active sites in carbon, can improve the electron conductivity and accelerate the sluggish kinetic reaction. Therefore, utilizing the louts leaves as the precursor, we successfully prepare the cellular-like nitrogen-doped activated carbon nanosheets (N-CNs) through the appropriate pyrolysis carbonization method. The as-synthesized carbon nanosheets display a three-dimensional interconnecting pore structure and abundant N-dopant actives, which dramatically improve the electrochemical catalytic activity of N-CNs. The Li-CO2/O2battery with the N-CNs cathode delivers a high discharge capacity of 9825 mAh g−1, low overpotential of 1.21 V, and stable cycling performance of 95 cycles. Thus, we carry out a facile method for N-doped carbon nanosheets preparation derived from the cheap natural biomass, which can be the effective cathode catalyst for environmental-friendly Li-CO2/O2battery.Keywords:biomass-derived carbon;carbon nanosheets;nitrogen defects;cathode catalyst;Li-CO2/O2battery
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高影响因子
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