ENERGY & FUELS
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2022
·
IF 4.654
Shumei Chen,Chao Miao,Lixing Liang,Jing Ouyang
This paper reports the synthesis and CO2 methanation performance of Ni/CeO2–ZrO2 (CZ) solid solutions assembled on different clay minerals (rectorite, attapulgite, halloysite, and kaolin). The catalytic performance of the samples was examined in temperature range 200−400 °C at normal pressures. The attapulgite (ATP) assembled Ni nps-incorporated-CZ solid solution (Ni–CZA) has the highest CO2 conversion and excellent stability. The CO2 conversion of the Ni–CZA catalyst reached up to 81.2% at 400 °C, and CH4 selectivity was nearly 100%. The catalyst assembled on ATP has excellent adsorption performance and a large specific surface area, resulting in higher Ce3+ and adsorbed oxygen content, thanks to the high content of oxygen vacancies and faster oxygen transfer speed. Mechanistic analysis shows that the H2 dissociates at the Ni site, the CO2 was decomposed into CO and O, and the ATP and CZ provide hydroxyls and oxygen vacancies, respectively, in this composite catalyst.
研究领域:
催化化学
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材料科学
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环境科学
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产品关联
DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 3
·1107
·
IF 3.4
Hongling Bie,Honghao Chen,Lijun Shan,C. Y. Tan,M. S. H. Al-Furjan,S. Ramesh,Youping Gong,Y. F. Liu,R. G. Zhou,Weibo Yang,Honghua Wang
An ideal artificial bone implant should have similar mechanical properties and biocompatibility to natural bone, as well as an internal structure that facilitates stomatal penetration. In this work, 3D printing was used to fabricate and investigate artificial bone composites based on HA-ZrO2-PVA. The composites were proportionally configured using zirconia (ZrO2), hydroxyapatite (HA) and polyvinyl alcohol (PVA), where the ZrO2played a toughening role and PVA solution served as a binder. In order to obtain the optimal 3D printing process parameters for the composites, a theoretical model of the extrusion process of the composites was first established, followed by the optimization of various parameters including the spray head internal diameter, extrusion pressure, extrusion speed, and extrusion line width. The results showed that, at the optimum parameters of a spray head diameter of 0.2 mm, extrusion pressure values ranging from 1–3 bar, a line spacing of 0.8–1.5 mm, and a spray head displacement range of 8–10 mm/s, a better structure of biological bone scaffolds could be obtained. The mechanical tests performed on the scaffolds showed that the elastic modulus of the artificial bone scaffolds reached about 174 MPa, which fulfilled the biomechanical requirements of human bone. According to scanning electron microscope observation of the scaffold sample, the porosity of the scaffold sample was close to 65%, which can well promote the growth of chondrocytes and angiogenesis. In addition, c5.18 chondrocytes were used to verify the biocompatibility of the composite materials, and the cell proliferation was increased by 100% when compared with that of the control group. The results showed that the composite has good biocompatibility.Keywords:artificial bone;biomanufacturing;finite element analysis;biological scaffold
研究领域:
生物医学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Xinzhu Gan,Zhigang Wang,Bin Tian,Yong Xu,Ling Li,Rongfu Xu
In this study, a solvothermal method was utilized to fabricate a CeO 2 /TiO 2 bilayer coating on ZrO 2 fibers without the use of seed layers. The crystalline morphology, composition, and microstructural characteristics of the bilayer coating were investigated using XRD , Raman, EDS-mapping, SEM, TEM and XPS techniques. The effectiveness of the bilayer coating in shielding infrared radiation was evaluated through the utilization of reflectance and effective specific extinction coefficient (e*). When a dual-layer coating was applied, the fiber's e* underwent a significant enhancement within the wavelength range of 2.5–8 µm, with a maximum increase of 76.13 %. The study showcased that, with nearly identical thickness conditions, the bilayer CeO 2 /TiO 2 coating outperformed both the single-layer TiO 2 coating and the single-layer CeO 2 coating in terms of infrared light-blocking performance. Furthermore, the bilayer structure demonstrated outstanding heat resistance, withstanding temperatures of up to 1200 ℃. This exceptional thermal stability positions it as a highly favorable choice for applications requiring infrared opacity in high-temperature environments.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2023
·
IF 6.7
Jiawen Xu,Xiumin Shi,Mingyue Yi,Yanze Chi,Shuang Guo,Zhu Mao,Bing Zhao,Young Mee Jung
Noble metal-based surface-enhanced Raman scattering (SERS)-active substrates have been developed for decades. However, nonreproducible aggregation and photoinduced molecular degradation limit the development of SERS technology. To overcome the shortcomings of noble metal-based SERS substrates, we designed ZrO 2 -based nanoparticles (NPs). By doping Mg and/or Zn ions into these ZrO 2 NPs , the SERS activity was significantly improved. Mg/Zn codoping of ZrO 2 resulted in a much higher oxygen deficiency, thereby providing a sufficient surface state energy (Ess) level to enable charge transfer (CT). The primary contribution for the Mg/Zn-codoped ZrO 2 was determined to be from the CT resonance effect, resulting in an enhancement factor (EF) as high as 10 4 . Most importantly, the CT-induced enhancement of Raman scattering based on Mg/Zn-codoped ZrO 2 has already demonstrated some promising applications in highly sensitive quinolone antibiotic drug determination. Different kinds of quinolone antibiotic drugs can be easily identified and quantitatively analyzed with high sensitivity and reproducibility.
研究领域:
分析化学
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材料科学
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药物分析
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Jian-Li Chen,Xiao-Hui Jia,Xinyue Xia,Xuan Wu,Yan-Neng Xu,Gang Yuan,Ze-Yun Gu,Kathy Qian Luo,Ming-Heng Yuan,Ruibin Jiang,Jianfang Wang,Xiao-Ming Zhu
Autophagy induction is responsible for the chemoresistance of histone deacetylase (HDAC) inhibitors. The combination of HDAC inhibitors with autophagy inhibitors has been considered a new strategy for treating solid tumors. However, codelivery systems capable of transporting these two kinds of drugs with different physicochemical properties and the simultaneous release of drugs remain elusive. In this study, hollow zirconium dioxide (ZrO 2 ) nanoshells were synthesized to encapsulate both the autophagy inhibitor chloroquine (CQ) and the HDAC inhibitor vorinostat (Vor) for effective combinational cancer therapy. The ZrO 2 nanoshells showed high loading capacities for both CQ and Vor due to the high affinity of ZrO 2 for the phosphate and hydroxamic acid groups of the drugs, and the drug-loaded ZrO 2 nanoshells exhibited a controlled release profile. The intrinsic autophagy inhibitory effect of the ZrO 2 nanoshells enhanced the effect of either the single drug (CQ or Vor) or the combination of these two drugs. The codelivery system enhanced the autophagy inhibition and hyperacetylation level in the cells compared with free drugs, resulting in a superior antitumor effect in 4T1 tumor-bearing mice. Taken together, the multifunctional ZrO 2 nanoshells hold great potential for the codelivery of HDAC and autophagy inhibitors for solid tumors therapy.
研究领域:
药学
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纳米技术
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癌症治疗
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药物递送系统
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2023
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IF 4.2
Xinbao Zhang,Guanghui Zhang,Xiangkun Zhou,Zhiqun Wang,Yi Liu,Jie Zhu,Chunshan Song,Xinwen Guo
Interest in identifying the structure of the catalysts in the reaction atmosphere has grown, but it remains challenging, especially when the changes only occur on the surface. Herein, we track the reaction-induced structural changes of ZnO/ZrO2 and their consequent effects on the activity and selectivity of CO2 hydrogenation. Utilizing a combination of in situ infrared and controlled experiments, we meticulously investigate the dynamic changes of the catalyst’s surface structure with time on stream. The reaction-driven growth of ZnOx clusters is correlated with the enhanced CO2 hydrogenation activity of ZnO/ZrO2. Furthermore, in situ infrared results show that the aggregation of ZnOx clusters promotes hydrogen activation, thereby facilitating the synthesis of methanol. The modification of the interfacial sites confirms the significance of the ZnO–ZrO2 interface as the main site for CO formation, while the surface of ZnOx clusters predominantly contributes to methanol synthesis at low zinc loading. These findings advance our comprehension of the structure–activity relationship of zinc-based catalysts for CO2 hydrogenation.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
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IF 4.175
Junchuan Wang,Ying Sun,Pengna Wang,Xuemin Yu,Hongbing Shi,Xueqin Zhang,Hong Yang,Baoping Lin
Novel one-dimensional (1D) core-shell structured BaTiO 3 @ZrO 2 (BT@ZrO 2 ) nanofibers have been synthesized through coaxial electrospinning. Homogeneous composite films containing 1D BT@ZrO 2 nanofibers as filler and polyimide (PI) as the polymer matrix were fabricated. The depolarizing ZrO 2 layer with moderate dielectric constant was introduced onto the BT nanofibers surface and decreased the electric filed caused by the tremendous contrast between the PI matrix and the BT nanofibers in permittivity. The energy density and breakdown strength of the BT@ZrO 2 /PI composites can be substantially enhanced. It was established that the 2 vol% BT@ZrO 2 /PI composite film has the maximum energy density of 2.53 J/cm 3 at 361 kV/mm, which is ≈ 180% higher than that of the pristine PI (1.40 J/cm 3 at 303 kV/mm). Furthermore, finite element simulation was carried out to understand the effect of ZrO 2 layer on the electric field distribution. This work demonstrates the advantages of the moderate inorganics layer in increasing the breakdown strength and highly enhancing the energy density of the polymer based composites.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
高影响因子
Advanced Materials Technologies
·
2022
·Vol. 7
·期 10
·2101583
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IF 8.856
Henghao Liu,Hongjun Kang,Xin Jia,Xianshu Qiao,Wei Qin,Xiaohong Wu
Passive daytime radiative cooling (PDRC) is a low-carbon energy technology to early achieve the “carbon neutrality” goal. Developing the commercial-like colored PDRC coatings with sub-ambient cooling performance is still a big challenge. Herein, a colored bilayer ZrO 2 -PVDF PDRC coating with sub-ambient cooling performance, self-cleaning, and good weather resistance property is first reported. The colored bilayer coating is composed of a thick ultra-white ZrO 2 -PVDF reflective layer ( R solar = 0.984) and a thin colorful layer. The obtained red bilayer ZrO 2 -PVDF PDRC coating has a high solar reflectance ( R solar = 0.950), which could realize the maximum temperature drop of 3.0 °C, and the calculated theoretical cooling power is as high as 131.66 W m −2 , showing a good sub-ambient cooling performance. Furthermore, they show a good self-cleaning property. Meanwhile, the accelerated aging tests prove that they have a good weather resistance. This work provides a low-cost, simple, and large-scale method to prepare the commercial-like colored PDRC coatings with the sub-ambient cooling performance, showing a great practical application value.
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
高影响因子
Crystals
·
2024
·Vol. 14
·期 5
·452
·
IF 2.4
Sen Yang,Ruiqing Ba,Jingnan Hong,Jing Li,Jingdong Guo,Xinghui He,Hongwei Zhang,Naihe Yi,Weibing Ma
Pure lanthanum hexaboride (LaB6) ceramics were prepared using powders of different grain sizes. The ceramics could reach a relative density of 98.2% at high temperatures and pressures, but had a low flexural strength (136.9 MPa). LaB6ceramics were synthesized using ZrO2-Al2O3-TiO2(ZAT) as sintering additives. The ceramics demonstrate high density and excellent mechanical properties. The hot pressure sintering (HPS) method was utilized in the synthesis of the ceramics. Investigations were conducted on the effects of ZAT content, as well as the effects of the sintering temperature and pressure on the sintering behavior, microstructure, and mechanical and electrical properties of LaB6ceramics. LaB6ceramics fabricated with a ZAT addition of 6 wt.%, at a sintering temperature of 1700 °C, and under a pressure of 50 MPa, exhibited superior sintering and electrical properties, including a relative density of 97%, a conductivity of 7.2 MS/m, a flexural strength of 281.5 MPa, and a Vickers hardness of 21.2 GPa. The LaB6ceramics synthesized in this research exhibit promising potential as electron-emitting cathodes for field emission applications.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Miao Jin,Bing Xu,Jun Ma,Chengcheng Yi,Yuefeng Liu
Fischer–Tropsch synthesis is a typical reaction for converting synthesis gas (i.e., CO and H2 mixture) to clean fuels, by coupling different processes, which can produce products such as engine fuels and other high value-added chemicals. However, searching for a suitable catalyst is still challenging due to its chemical structure-sensitive properties, which greatly affect the interaction with active components, thereby altering the reaction activity or product selectivity. In this work, the nanosized ZrO2 with different oxygen vacancy concentrations was synthesized by using UiO-66 as a precursor and applied for supporting cobalt nanoparticles. The results showed that treatment of nanosized ZrO2 carrier with diluted nitric acid at an appropriate temperature could effectively modulate its surface oxygen vacancy and subsequently alter the FTS activity. The optimized Co/C-ZrO2-80 catalyst with a high concentration of oxygen vacancy displayed a CO conversion of 44.2% and a cobalt time yield (CoTY) of 20.9 × 10–5 molCO gCo–1 s–1 at 220 °C, which shows a 2.9-fold increase in CoTY compared with the conventional ZrO2-supported catalyst. Multiple characterizations and comparative experiments indicated that oxygen vacancies on the surface of ZrO2 enhanced the electron transfer and the interaction between Zr and Co species. Zr-OV-Co interface sites promoted the adsorption and dissociation of CO and H2 molecules. This work provides a new perspective for studying the effect of oxygen vacancies on the structure and reactivity of cobalt-based FTS catalysts.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
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2024
·
IF 5.3
Wenwen Deng,Shaocong Ni,Naiqi Hu,Ying Zhou,Zhong Jin
Silicon oxide (SiOx) has been widely studied due to its ultrahigh theoretical specific capacity for lithium storage. However, its inherent low electronic conductivity and large volume change before and after lithium insertion have limited its commercialization. To address this issue, we report the synthesis of SiOx@ZrO2@C ternary composite nanospheres by convenient and scalable wet chemistry and sintering processes. In the unique structure of 3D porous SiOx@ZrO2@C nanospheres, zirconium oxide (ZrO2) supplies high structural stability, while the amorphous carbon (C) layer helps to form a stable solid–electrolyte interface, suppress volume expansion, and greatly improve the conductivity. Electrochemical measurements demonstrate that the SiOx@ZrO2@C nanospheres exhibit a capacity retention of 72.2% after 500 cycles at 500 mA g–1. At a high current density of 800 mA g–1, the SiOx@ZrO2@C nanospheres can still deliver a capacity of 529.1 mAh g–1. This work provides a promising mass-scale synthesis method for producing SiOx composites and introduces a high-performance anode material for lithium-ion batteries.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2024
·
IF 11.2
Ying Xue,Xianyuan Liu,Xianyong Lu
Hierarchically three-dimensional (3D) materials present a pivotal challenge and opportunity in achieving effective microwave absorption with synergistic effects. In this work, α -Fe 2 O 3 @ZrO 2 with core-shell structure were fabricated in-situ on aramid nanofibers by a solvothermal method . Following calcination , 3D ZrO 2 /Fe 3 O 4 /C nanocomposites with Janus structure have been successfully synthesized. By controlling the lattice match and mismatch in both processes, a core-shell structure of α -Fe 2 O 3 @ZrO 2 and Janus structure of ZrO 2 /Fe 3 O 4 have been well-define performed. The composite material ZrO 2 /Fe 3 O 4 /C-700 has a minimum reflection loss (RL min ) of −67.4 dB at a thickness of 2.0 mm. The effective absorption bandwidth (EAB) at a thickness of 2.4 mm is 6.0 GHz (11.0–17.0 GHz). This study provides a novel strategy for fabricating high-efficiency electromagnetic wave absorption materials with dual synergistic effects in nanosized scale.
研究领域:
材料科学
·
电磁学
✓ 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）