Journal of Cleaner Production
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2023
·
IF 11.1
Xinqian Li,Bo Li,Yaping Dong,Zhengrong Niu,Dandan Gao,Haitao Feng,Wu Li
How to effectively and environmentally purify chromate solutions containing impurities such as silicon and vanadium, and avoid the generation of Cr(VI)-containing residues are important issues to be solved urgently. Herein, a novel Cr 2 O 3 ∙2.7H 2 O adsorbent with stable three-dimensional nanoflower structure was fabricated using the hydrothermal method , which was successfully implemented in the removal of Si(IV) and V(V) from dichromate system. Batch adsorption experiments revealed that the saturated adsorption capacity of Si(IV) was 140.06 mg/g at pH 9 and 132.98 mg/g V(V) at pH 2. Furthermore, density functional theory (DFT) calculations revealed that V(V) anionic species exhibited high adsorption energies (−990.70 kJ/mol, −697.10 kJ/mol) and small adsorption distances from the β-CrOOH(012) (≈1.89 Å, 1.98 Å), verifying the selective adsorption of Cr 2 O 3 ∙2.7H 2 O on V(V) in Cr(VI)–Si(IV)–V(V) ternary systems . The integrated mechanisms of electrostatic interaction, coordination, polymerization and precipitation for the removal behaviors were proposed via FT-IR, XPS and DFT calculations. In the real Na 2 Cr 2 O 7 complex solutions, the simultaneous removal rates of 88.48% Si(IV) and 80% V(V) were achieved, with optimal adsorption conditions at a pH of 8 and a temperature of 333 K. Furthermore, the desorbed Cr 2 O 3 ∙2.7H 2 O can be effectively converted into high-value nano Cr 2 O 3 , indicating the potential of this new green adsorbent. Therefore, this study not only imparts theoretical and practical insights into the purification of chromate solutions but also contributes to the advancement of cleaner chromium compound production by facilitating the high-value conversion of the adsorbent.
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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DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Yu Wang,Lkhamsuren Bayarjargal,Maxim Bykov,Elena Bykova,Dominik Spahr,Konstantin Glazyrin,Victor Milman,Bjoern Winkler
We synthesized three carbonates, Cr2[CO3]3, Cr2[C2O5][CO3]2, and Cr2[CO3][O]2, containing Cr3+ by laser heating of chromium oxides in CO2 at pressures between 45 and 55 GPa. All phases were characterized by single-crystal X-ray diffraction and Raman spectroscopy, while density functional theory calculations complemented the experimental results. The structure of Cr2[CO3]3-P63/m contains coplanar groups, and a 4f Wyckoff site is half occupied by Cr3+. Cr2[C2O5][CO3]2-C2/c is characterized by coplanar [CO3]2− and pyro-[C2O5]2− anions and is isostructural to Al2[C2O5][CO3]2. It was obtained only after prolonged laser heating. The oxycarbonate Cr2[CO3][O]2-Pbcn was synthesized at the highest pressure (55 GPa) studied here. In this structure, half of the oxygen atoms coordinate one carbon and two Cr atoms, while the other half coordinate three chromium atoms. The oxidation state of chromium in the carbonates is +3, independent of the oxidation state (+3 or +4) of chromium in the oxide starting material. We observed the transformation of Cr2O3-R3̅c to Cr2O3-Pbcn above 45(2) GPa after laser heating.
研究领域:
矿物学
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材料科学
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产品关联
DOI
PubMed
高影响因子
International Journal of Nanomedicine
·
2025
·
IF 6.5
Can Li,Guiju Chen,Xiongwei Yan,Bingyang Hu,Xiangyun Zhang,Jun Song
Introduction Osteoarthritis (OA) is one of the major menaces to human health. Currently, no sufficiently effective medications are available to treat OA clinically. OA is an inflammatory joint disorder. The overproduction of reactive oxygen species (ROS) plays a critical role in initiating and developing OA pathogenesis. ROS scavenging has become a vital target for OA therapy. Although chromium sesquioxide (Cr2O3) nanoparticle has been proven to have excellent ROS scavenging ability, its clinical application is limited due to its poor biocompatibility. Polydopamine (PDA) is an excellent carrier with outstanding biocompatibility. PDA-based nanomaterials exhibit significant potential for various ROS-related diseases.Methods PDA was synthesized through oxidative autopolymerization of dopamine in an alkaline environment. Subsequently, the novel nanozyme PDA-Cr2O3 was synthesized by loading Cr2O3 onto PDA nanoparticles with the assistance of hydrazine hydrate. Afterward, the cytotoxicity and ROS scavenging capacity of PDA-Cr2O3 were examined. Finally, the ability of PDA-Cr2O3 to treat OA was explored at both cellular and animal levels.Results PDA-Cr2O3 had low cytotoxicity and toxic side effects in vivo. Moreover, PDA-Cr2O₃ exhibited a remarkable capacity to scavenge ROS both in cell-free in vitro systems, such as kit-based assays, and in cellular models. It also dramatically decreased the transcriptional level of inflammation-associated genes and the secretion of inflammatory factors of the OA chondrocytes. In animal experiments, PDA-Cr2O3 markedly suppressed the progression of OA.Conclusion PDA-Cr2O3 nanozyme had good biocompatibility and could effectively suppress the development of OA by efficiently scavenging ROS, which has important application prospects in OA treatment. This study might offer some new ideas for the treatment of ROS-related diseases.
研究领域:
纳米医学
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生物化学
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药理学
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材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 103
·100790-100795
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IF 3.289
Daixiong Zhang,Qing Xiang,Xueming Li
As a nanoenergetic material with high energy density, nanothermite coatings composed of metal and oxidant have potential applications in electric-explosion devices. In this study, a novel highly reactive Al–Cr2O3 coating was successfully fabricated via electrophoretic deposition (EPD) technology. Moreover, with the advantage of high fabrication rate by employing high concentration of Al and Cr2O3 nanoparticles, an electric-explosion device with successful explosion could be easily obtained via assembling an Al–Cr2O3 coating onto Cu electric-explosion bridges in only 1 minute, which is much more efficient than other coating technologies. More importantly, considering the successful preparation of other reactive coatings in previous work, we also believe that EPD is a promising general strategy for rapidly preparing electric-explosion device with many other nanoenergetic material coatings such as nanothermite and bimetallic reactive composites.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2024
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IF 6.2
Huaqin Huang,Rui Wang,Kaixuan Li,Bing Dai,Zhaoyang Wu,Peisheng Lyu
Optimising solid-phase reactions at the interface between an iron-based soft magnetic powder matrix and an inorganic oxide ceramic insulating layer in soft magnetic composites is an effective method to overcome the inverse relationship between magnetic conductivity and energy losses in these materials. However, solid-phase reactions at the interface are currently based on using highly reactive aluminium within iron-based soft magnetic powders. Herein, an interface reaction between ZnSO 4 and FeSiCr was successfully conducted to afford formation of FeSiCr-based soft magnetic composites, which are characterised by a three-layer structure comprising FeSiCr, a Si and Cr-rich layer and a ZnO·SiO 2 ·Cr 2 O 3 composite insulating layer. Thermal decomposition of ZnSO 4 releases O 2 , which induces the migration of Cr and Si atoms from the FeSi 3.7 Cr 4.5 soft magnetic powder matrix towards the interface and their subsequent reaction; this increases the magnetic phase content and enhances the crystalline structure order of the powder matrix. Furthermore, the ZnO·SiO 2 ·Cr 2 O 3 composite insulating layer effectively insulated the FeSiCr soft magnetic powder matrix. The resulting FeSiCr-based soft magnetic composite materials with the ZnO·SiO 2 ·Cr 2 O 3 composite insulating layer exhibit low core losses (58.5 kW/m 3 ), high magnetic permeability (39.1) and high saturation magnetisation (166.5 emu/g), indicating they are an ideal choice for high-performance electromagnetic components. The proposed innovative strategy of oxygen release through the thermal decomposition of salt compounds affords an insulating coating on soft magnetic composite materials fabricated based on interfacial solid-phase reactions.
研究领域:
材料科学
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电磁学
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产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2014
·Vol. 97
·期 11
·3413-3417
·
IF 2.428
Daixiong Zhang,Xueming Li,Bo Qin,Xiaolin Li,Xiaogang Guo,Chuan Lai
Chromium (III) oxide has been widely used as a coating material for corrosion resistance. In this study, electrophoretic deposition (EPD) of nano chromium (III) oxide (Cr 2 O 3 ) particle (60 nm) was investigated to develop coatings with potential applications of anticorrosive material. The stable suspension of Nano-Cr 2 O 3 particles were obtained in the mixture of acetylacetone and ethanol containing 0.00025 M nitric acid. The coating growth rate was studied with using different deposition times in the range of 1–30 min at voltages of 50–150 V with various concentrations of suspension. The electrophoretic Cr 2 O 3 coating was sintered at 1000°C and 1200°C for 2 h. The micro-morphology of coating was qualitatively characterized by focused ion beam scanning electron microscopy (FIB/SEM). The SEM micrographs obviously showed that the electrophoretic Cr 2 O 3 coating has formed a uniform and dense ultrathin layer after sintering at 1200°C. We demonstrated that nano-Cr 2 O 3 coating could be easily obtained by EPD for the surface modification of metallic materials for potential interest in hard wear-resistant and/or low-friction coatings.
研究领域:
材料科学
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表面工程
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产品关联
DOI
高影响因子
Molecular Catalysis
·
2022
·
IF 5.089
Rongzhao Li,Chengtao Zhang,Shuo Li,Yupeng Du
Propane dehydrogenation is commonly operated at temperatures exceeding 600 °C due to thermodynamic requirements. However, high temperature accelerates the deactivation of catalysts because of the coke deposition. Therefore, it is quite necessary to develop catalysts with high catalytic activity and improved anti-coking ability. To this end, an Al-doped Cr 2 O 3 catalyst derived from MIL-101(Cr/Al) is prepared in this work. The preparation conditions, including the carbonization temperature of MIL-101 and the proportion of Cr/Al, are optimized via experimental studies. Meanwhile, the adsorption and dehydrogenation behaviors of propane on the catalyst are investigated using Density Functional Theory (DFT) methods. Findings indicate that the optimum carbonization temperature and Cr/Al proportion are 900 °C and 6:4, respectively. Under the reaction condition of P = 0.1 MPa, T = 580 °C and GHSV = 800 h −1 , the propane conversion and propylene selectivity on the Cr 6 /Al 4 catalyst are 19.5% and 92.0%, respectively. The activity stability of the Al-doped Cr 2 O 3 is elongated significantly due to the lower desorption energy of propene and higher energy barrier for the coke formation on the catalyst. In sum, the present work completed via experiments and DFT calculations will lead to a better understanding of the Al-doped Cr 2 O 3 catalyst and guide the rational design of anti-coking catalysts for propane dehydrogenation.
研究领域:
化学工程
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2026
·
IF 10.7
Hanyu Yang,Meixuan Song,Xinbo Pan,Lijun Zhao
Rechargeable aqueous zinc-ion batteries (AZIBs) are promising candidates for large-scale energy storage owing to their safety and cost efficiency. To overcome industrialization challenges such as dendrite growth and hydrogen evolution, interface engineering has emerged as an effective strategy. Herein, a facile scraper-coating method using commercial Cr 2 O 3 powder is employed to construct a protective anode layer. The porous Cr 2 O 3 coating provides abundant Zn 2+ diffusion pathways and adsorption sites, optimizing nucleation kinetics and lowering the energy barrier. This facilitates relatively uniform zinc deposition, effectively suppressing dendrite formation and corrosion. Consequently, the Cr 2 O 3 @Zn-100 ǁ Cu asymmetric battery delivers nearly 100% coulomb efficiency over 2000 cycles at 5 mA cm −2 , while the symmetric battery exhibits over 2800 h of stable cycling at 0.5 mA cm −2 . This cost-effective, extensible method significantly enhances cycling durability and offers a practical pathway toward the commercial implementation of AZIBs.
✓ 已验证
DOI
高影响因子
ACS Catalysis
·
2026
·Vol. 16
·期 17
·17380-17391
·
IF 13.6
Ma Meifeng,Zhang Rongwang,Deng Shaorong,Zhao Xilai,Yang Fei,Fang Xiuzhong,Wang Xiang,Xu Xianglan
Rational design of highly active catalysts for low-temperature CO 2 methanation remains a critical challenge for efficient CO 2 utilization. Herein, we demonstrate that Mn incorporation into the Cr 2 O 3 lattice, rather than surface modification, markedly enhances the catalytic performance of Ru/Cr 2 O 3 catalysts. The optimal Ru/Mn 0.10 Cr 0.90 O x catalyst (2.24 wt % Ru) achieves 91% CO 2 conversion at 200 ° C with a space velocity of 36,000 mL g cat –1 h –1 , substantially exceeding that of the parent Ru/Cr 2 O 3 (4% at 200 ° C). Compared with Ru/Cr 2 O 3 , Ru/Mn 0.10 Cr 0.90 O x exhibits a 4.1-fold higher turnover frequency at 180 ° C, confirming the intrinsic catalytic enhancement conferred by Mn lattice doping. Comprehensive characterization revealed that Mn lattice doping generates Mn-O-Cr bonds, creating distinct Ru/O-Cr-O v -Mn interfacial sites in contrast to the Ru/O-Cr-O v -Cr interfaces present in undoped Ru/Cr 2 O 3 . In situ DRIFTS and H 2 -TPSR-MS studies demonstrated that low-temperature CO 2 methanation on Ru/Mn 0.10 Cr 0.90 O x proceeds concurrently via both CO* and HCOO* intermediate pathways, whereas only the CO* pathway operates on Ru/Cr 2 O 3 . DFT calculations revealed that Mn doping selectively modulates CO 2 adsorption at the interface while minimally affecting bridged Ru sites. At the Ru/O-Cr-O v -Mn interface, oxygen vacancies form and regenerate more readily than at the Ru/O-Cr-O v -Cr interface during CO 2 methanation, enabling an additional HCOO* pathway. This dual-pathway mechanism fundamentally underpins the enhanced low-temperature activity of Ru/Mn 0.10 Cr 0.90 O x and provides a promising design strategy for developing efficient CO 2 methanation catalysts.
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产品关联
DOI
高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2018
·Vol. 125
·期 1
·199-211
·
IF 1.515
Hao Fang,Yang Yongzhe,Xiong Wei,Liu Pingle,You Kuiyi,Luo He’an
Mesoporous SiO 2 –Al 2 O 3 supported Cr 2 O 3 catalysts were prepared by the sol–gel and impregnation methods. These catalysts were characterized and applied in cyclohexane nitrosation reaction. The effects of the preparation conditions and the catalyst deactivation were studied. The results show that 20% Cr 2 O 3 /SiO 2 –Al 2 O 3 catalyst calcined at 400 °C exhibits not only the larger surface area, smaller particle size, but also the larger amount of Cr 2+ and Brønsted acid sites. These catalysts show good catalytic performances in the cyclohexane nitrosation to ε-caprolactam and could be recycled for several times in this reaction system for the first time. The catalyst of Cr 2 O 3 /SiO 2 –Al 2 O 3 calcined at 400 °C gives 10.8% conversion with 79.9% selectivity to ε-caprolactam.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 19
·7868-7879
·
IF 4.5
Li Junguo,Zhong Xinyu,Luo Guoqiang,Cai Qiwang,Shen Qiang,Tu Rong,Guo Xiaoping,Ding Renchi
Zirconia toughened alumina (ZTA) ceramics are commonly used in various industries. Adding suitable additives is an effective way to improve the performance of ZTA ceramics. However, the common reinforcement in ZTA, chromia (Cr 2 O 3 ), tends to volatilize at high temperature in the presence of oxygen, limiting ceramic densification. Consequently, additional amounts of Cr 2 O 3 are typically limited to below 1 wt%. In this study, spark plasma sintering was utilized to inhibit the volatilization of Cr 2 O 3 . Dense ZTA ceramics with high Cr 2 O 3 content (from 1 to 10 wt%) were prepared at 1350 °C. The impact of the solid solution on the structure and properties of the ceramics was investigated. The findings demonstrate that the high Cr 2 O 3 solution can regulate the grain size in the matrix, leading to an enhancement in both hardness and fracture toughness. The optimum performance of the sample was obtained with a 5 wt% dosage of Cr 2 O 3 , where the maximum values of Vickers hardness and fracture toughness were 20.66 GPa and 6.37 MPa m 1/2 , respectively.
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 14
·11795-11800
·
IF 2.324
Bai Ya,Qu Shaohua,Jia Zirui,Zhang Limin,Zhu Guangyao,Feng Ailing,Wu Guanglei,Wu Hongjing
The cyclic stability of Cr 2 O 3 is very poor due to the large volume change during lithiation/delithiation. In this study, we have found that Cr 2 O 3 nanocrystals synthesized by using a simple hydrothermal method can improve its cyclic stability. Sample calcined at 430 °C has uniform size, compact structure and high crystallization degree. These Cr 2 O 3 nanocrystals exhibit a stable cyclic performance of 185 mAh g −1 after 100 cycles at 100 mA g −1 . It is useful in real life, such as providing power consumption for minitype device, etc.
研究领域:
材料科学
·
储能
·
纳米技术
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）