OPTICAL MATERIALS
·
2025
·
IF 4.2
Jianjun Zeng,Kuibao Zhang,Xi Zhang,Shengquan Yu
The co-precipitation method allows rapid and large-scale preparation of highly active Mg–Al spinel precursors, but the crystalline growth of precursors affects the activity of the calcined powders. In the study, the stirring is introduced to inhibit the crystal growth during aging. The effects of stirring during aging on the grain growth of precursors, the phase composition and morphology of calcined powders and the optical transmittance of ceramics were comparatively investigated. It is found that the rod-like morphology obtained by static aging would be retained after calcination, resulting in the formation of a small number of pores in the HIPed ceramics. The stirring effect inhibits the growth of the precursor and molds it into granular-like particles, resulting in spherical-like particles of approximately 50 nm after calcination. The transmittance of stirred aging in the near-infrared wavelength band is also above 80 % (1000–1500 nm) and the maximum transmittance of 84 % can be achieved at 1300 nm wavelength.
研究领域:
材料科学
·
陶瓷
·
无机化学
·
光学材料
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产品关联
DOI
高影响因子
CHEMOSPHERE
·
2024
·
IF 8.1
Chengqiang He,Yue Sun,Yingpeng Gu,Hongyu Ji
Generally, the pH of fluorinated groundwater or many industrial wastewater is neutral, while the majority of metal-modified adsorbents can work efficiently only under acidic conditions. In this study, we synthesized a novel hybrid adsorbent, Mg–Zr-D213, by loading nano-Mg/Zr binary metal (hydrogen) oxides in a strong-base anion exchanger, D213, to enhance the adsorption of fluoride from neutral water. Mg–Zr-D213 exhibited a better fluoride-removal capacity in neutral water than monometallic modified resins. Under the interference of competing anions and coexisting organic acids, Mg–Zr-D213 exhibited superior selectivity. The Langmuir model indicated that the fitted maximum sorption capacity of Mg–Zr-D213 was 41.38 mg/g. The results of column experiments showed that the effective treatment volume of Mg–Zr-D213 was 8–16-times higher than that of D213 for both synthetic groundwater and actual industrial wastewater, and that NaOH–NaCl eluent could effectively recover more than 95% of fluoride. Adsorption experiments with Mg/Zr metal (hydrogen) oxide particles and D213 separately demonstrated a synergistic effect between –N + (CH 3 ) 3 and Mg/Zr metal (hydrogen) oxide particles. The ligand exchange or metal-ligand interaction of Mg/Zr metal (hydrogen) oxide particles on fluoride was further demonstrated via X-ray photoelectron spectroscopy. Overall, Mg–Zr-D213 has great potential for enhanced fluoride removal in neutral water.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Yuxuan Wu,Yinda Li,Yunhao Lu,Jicheng Jiang,Aijun Zhou,Bo Xu,Xiongwen Xu,Jian Tu,Bin Pan,Xinbing Zhao,Jian Xie
Among some practical O3-type layered oxide cathodes, NaNi 1/3 Fe 1/3 Mn 1/3 O 2 (NFM) features a high specific capacity and moderate cyclability. However, sluggish Na + transfer kinetics, low structural stability, and rapid capacity loss during long-term cycling, are still posing a challenge to commercial applications of this material. In this work, we propose a Mg and Cu co-doped O3-type NaMg 0.02 Cu 0.02 Ni 0.33 Fe 0.27 Mn 0.36 O 2 (MC-NFM) with a stable structure and good cycling stability. It was found that the Mn O bonds in MC-NFM are obviously reinforced by synergistic doping with small amounts of Mg and Cu, leading to enhanced structural robustness, decreased Na + migration barrier, and delayed O3-P3 phase transition. As a result, longer cycle life and enhanced rate performance are achieved. MC-NFM can yield a specific capacity of 142.1 mAh g −1 at 0.1C and 116.0 mAh g −1 at 5C, and maintain 83.6 % of its initial capacity after 400 cycles at 1C. This work provides a promising design of O3-type cathode for sodium-ion batteries.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
·
IF 5.455
Changhao Yan,Shouteng Zheng,Na Chen,Shouqi Yuan,Yao Chen,Bing Li,Yunlei Zhang
In this work, the novel acid-base bi-functional mesoporous SBA-15 catalysts with four kinds of morphologies were synthesized by Mg incorporated and sulfated zirconia (SZ) grafted. The introduction of Mg to mesoporous SBA-15 materials significantly improves the strength of the base. And the supported SZ group exhibit effective Brønsted/Lewis acid strength. The physical and chemical properties of the prepared materials were systematically analyzed by the characterization tests of SEM, TEM, XRD , N 2 adsorption-desorption of, FT-IR, TGA , XPS, NH 3 /CO 2 -TPD and in-suit PY-IR. The obtained catalysts of SZ@Mg-SBA-15 could be applied to the fructose conversion into 5-hydroxymethylfurfural (5-HMF) with the co-solvent system of iPrOH/DMSO ( v / v = 9:1). 5-HMF was achieved under the optimal reaction condition with the highest yield of 98.6%. The result shows that the reaction of fructose dehydration into 5-HMF could be caused by the combination of Brønsted acid site and basic site. This work developed reaction system could avoid the large use of environmentally dangerous solvents, and provides a new economical and feasible method for the large-scale conversion of fructose biomass.
研究领域:
催化化学
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生物质化学
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材料科学
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产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2023
·
IF 6.2
Lei Zhou,Xiangyu Xi,Haidong Li,Han Song,Qiong Mei,Yuankun Yang,Shu Chen,Qunwei Dai,Faqin Dong
Vanadium contamination has gained increasing attention around the world and it is urgent to develop feasible approach to tackle this growing pollution (e.g., vanadate). Herein, density functional theory (DFT) calculations combined with batch experiments were used to systematically evaluate the capacity of Mg(OH) 2 to adsorb vanadate , by investigating the impacts of different exposed facet and surface OH defect on the structure configurations, adsorption energy and the efficiency of vanadate adsorption. DFT calculations suggested that although the capacity of vanadate adsorption on the facets of Mg(OH) 2 would be obviously influenced by the formation of various coordination complex (e.g., monodentate, bidentate and tridentate) on each facet, the capacity for these facets of Mg(OH) 2 towards vanadate adsorption followed the order: (100) > (001). Moreover, such a vanadate adsorption was further enhanced by the presence of surface OH defect, owing to altered densities of states (DOS) of the adsorption site. Batch experiments verified the defect-rich Mg(OH) 2 was favorable to adsorb vanadate, and both (001) and (100) facet play the great roles. This molecular-level understanding of the facet-dependent and defect-enhanced adsorption behavior of Mg(OH) 2 toward vanadate provides a useful insight into designing and applying effective adsorbents for the removal of heavy metal oxyanions.
研究领域:
环境科学
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材料科学
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化学
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产品关联
DOI
高影响因子
Polymers
·
2021
·Vol. 13
·期 14
·2302
·
IF 4.329
Qingwen Yu,Zhiyuan Meng,Yichao Liu,Zehao Li,Xing Sun,Zheng Zhao
After an osteosarcoma excision, recurrence and bone defects are significant challenges for clinicians. In this study, the curcumin (Cur) loaded chitosan (CS) nanoparticles (CCNP) encapsulated silk fibroin (SF)/hyaluronic acid esterified by methacrylate (HAMA) (CCNPs-SF/HAMA) hydrogel for the osteosarcoma therapy and bone regeneration was developed by photocuring and ethanol treatment. The micro or nanofibers networks were observed in the CCNPs-SF/HAMA hydrogel. The FTIR results demonstrated that alcohol vapor treatment caused an increase in β-sheets of SF, resulting in the high compression stress and Young’s modulus of CCNPs-SF/HAMA hydrogel. According to the water uptake analysis, SF caused a slight decrease in water uptake of CCNPs-SF/HAMA hydrogel while CCNPs could enhance the water uptake of it. The swelling kinetic results showed that both the CCNPs and the SF increased the swelling ratio of CCNPs-SF/HAMA hydrogel. The accumulative release profile of CCNPs-SF/HAMA hydrogel showed that the release of Cur from CCNPs-SF/HAMA hydrogel was accelerated when pH value was decreased from 7.4 to 5.5. Besides, compared with CCNPs, the CCNPs-SF/HAMA hydrogel had a more sustainable drug release, which was beneficial for the long-term treatment of osteosarcoma. In vitro assay results indicated that CCNPs-SF/HAMA hydrogel with equivalent Cur concentration of 150 μg/mL possessed both the effect of anti-cancer and promoting the proliferation of osteoblasts. These results suggest that CCNPs-SF/HAMA hydrogel with superior physical properties and the bifunctional osteosarcoma therapy and bone repair may be an excellent candidate for local cancer therapy and bone regeneration.Keywords:curcumin;hyaluronic acid;silk fibroin;chitosan nanoparticle;MG-63 cells;MC3T3-E1 cells
研究领域:
生物医学工程
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药学
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材料科学
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肿瘤学
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Hairus Abdullah,Sethupathi Shanmugasundaram,Mohamed Tarek Ahmed,Hardy Shuwanto,S.K. Krishna,Dong-Hau Kuo
Carbon-free based fuels are a promising solution to overcome the world energy crisis and environmental pollution . Therefore, hydrogen fuel is a critical and sustainable energy source to replace the limited carbon-based fossil fuels, which can be generated using a simple photocatalysis method. Herein, we demonstrated that Ni- and Mg-doped ZnIn 2 (O,S) 4 (NMZI) photocatalysts prepared with a hydrothermal process performed an unprecedented HER rate without a noble-metal cocatalyst under visible-light illumination. The amounts of Ni and Mg dopants in NMZI were varied and the as-prepared NMZI were characterized with SEM, TEM, XRD, Raman, FTIR, XPS, EPR, DRS, PL , EIS, TPC , CV, and tested for photocatalytic HER . It was found that the Ni and Mg co-dopants induced substitutional surface defects of Zn In − , Ni In − , and Mg In − . As a result, the formation of oxygen vacancy ( V O 2 + ) compensated the induced defect charges, which are crucial in the HER mechanism. EDS, ICP, and XPS analyses suggest a non-stoichiometric Zn(Zn,Ni,Mg,In) 2 (O,S) 3.5 with Zn, Ni, and Mg occupying In sites in the structure. The NMZI catalyst could achieve a maximum HER rate of 9.4 mmol/g․h under visible-light illumination. It is believed that the HER performance improvement is due to the defect formation on NMZI catalyst that subsequently enhances the optical, electrochemical, and photocatalytic properties. The photocatalytic HER mechanism has been elucidated and discussed thoroughly in this work.
研究领域:
材料科学
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能源与环境科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2022
·Vol. 9
·期 6
·065505
·
IF 2.025
Qinghong You,Xiulian Yin,Jun Wang,Chunhua Dai
A recyclable heterogeneous KF/Ca-Mg-Al-O catalyst was prepared by co-precipitation and calcination processes. The characteristics of the catalyst were investigated using FTIR, XRD, TG-DTG and SEM. Response surface methodology was utilized to obtain the best most extreme biodiesel production yield. The ideal biodiesel production conditions were: the amount of catalyst was 3 wt%; the reaction temperature was 65 °C; the alcohol oil molar ratio 9.8:1, the reaction time was 3.5 h. Under these amended conditions, the average biodiesel yield was 95.19%, which is well in close concurrence with the worth anticipated by the model. The repeatability of catalysts was studied. After using the catalyst seven times, the catalytic efficiency was only reduced by 2.7%. These results indicate that the catalyst has good catalytic efficiency and is recyclable.
研究领域:
化学工程
·
能源科学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2015
·Vol. 30
·期 10
·1639-1647
·
IF 1.647
Xueming Liu,Chunge Niu,Xinping Zhen,Jide Wang,Xintai Su
A phase transfer method was developed to prepare Mg(OH)2 nanosheets and a subsequent adsorption–calcination process was followed to obtain lamellar MgO nanostructures. The as-prepared MgO nanosheets also showed a superior adsorption property of Congo red. Transmission electron microscopy and x-ray diffractometer results indicated that the as-obtained Mg(OH)2 was plate-shaped with a hexagonal crystal structure where MgO possessed a lamellar structure with a cubic phase. The maximum adsorption capacities of Mg(OH)2 and MgO were reached up to 1820 and 2650 mg g−1, respectively. The high adsorption capacity might be related to the particle geometry and large surface area (87.97 m2 g−1 for Mg(OH)2 and 132.31 m2 g−1 for MgO). The adsorbents can be easily regenerated for five times without any significant loss in their adsorption property. The adsorption behaviors of the Mg(OH)2 and MgO adsorbents showed that the adsorption kinetics and isotherms were in good agreement with pseudo-second-order rate equation and Freundlich adsorption model.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 8
·1-12
·
IF 5.3
Shi Zhaoxia,Luo Zhen,Liu Yilu,Liu Zi,Chen Xinyue,Zhang Yintang,Zhou Yanli,Xu Maotian
Four different morphologies of TiO 2 were successfully synthesized and the morphological dependence of the catalytic performance was investigated for monitoring of n -hexane. TiO 2 nanotubes showed the best catalytic performance for the cataluminescence (CTL) reaction of n -hexane because of their high specific surface area and ordered arrangement. To further enhance catalytic activity, a TiO 2 nanotube@Mg-MOF-74 composite was synthesized, which was used to construct a CTL sensor for rapid detection of n -hexane rapidly; the introduction of Mg-MOF-74 improved the adsorption capacity and selectivity. A CTL sensor was constructed based on TiO 2 nanotube@Mg-MOF-74 for the rapid detection of n -hexane, Under the optimal conditions there was a good linear relationship between CTL signal intensity and the concentration of n -hexane in the range 0.20–200.0 mg/L. The detection limit (LOD, S/N = 3) was 0.08 mg/L. The RSD values for 11 consecutive measurements using the same sensor and 7 different sensors were 2.8% ( n = 11) and 3.5% ( n = 7), respectively, demonstrating good repeatability and reproducibility. Finally, the sensor was used to detect n -hexane in air samples from different workplaces, with recoveries ranging from 90.2 to 106.4%, showing good accuracy. Thus, the developed CTL sensor could be used for rapid detection of n -hexane in air, avoiding damage to health caused by excessive inhalation. Graphical abstract
研究领域:
分析化学
·
材料科学
·
环境监测
·
传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Xiubo Xie,Ming Chen,Peng Liu,Jiaxiang Shang,Tong Liu
The Mg-5.0 wt%Ni-2.3 wt%V nanocomposite has been produced through reducing NiCl 2 with the Mg-V nanoparticles (NPs) prepared by hydrogen plasma metal reaction (HPMR) approach. The in situ formed Ni and V particles of about 15 nm uniformly decorate on the surface of Mg NPs. The Ni NPs transform into Mg 2 Ni while the V NPs remain unchanged after first hydrogen absorption and desorption cycle at 673 K. They show synergistic catalytic effects on the hydrogen storage properties of Mg-Ni-V nanocomposite. The nanocomposite can absorb 4.6 wt% H 2 within 30 min at 473 K and desorb 5.2 wt% H 2 within 10 min at 623 K. The activation energies of hydrogenation/dehydrogenation processes are decreased to 52.8 and 85.1 kJ per mol H 2 , lower than those of the Mg-5.4 wt%Ni nanocomposite of 63.2 and 89.3 kJ per mol H 2 . The enhanced hydrogen storage performances of the Mg-Ni-V nanocomposite are mainly attributed to the synergistic catalytic effects of the Mg 2 Ni and V catalysts, and the nanosize effect of Mg NPs on the decrease of the hydrogen diffusion distance.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2025
·
IF 5.8
Xiaolong Yan,Yuxuan Deng,Wanming Huang,Qijun Zhang,Li Zheng,Junfeng Zhou,Dongsheng He,Jiayu Ma
This study investigated LDHs-MgAl preparation factors on Gly adsorption performance. The single-factor experiments shown that CO 3 2− -type LDHs-400-MgAl prepared under the condition of calcination temperature of 400 °C, calcination time of 3 h, Mg/Al molar ratio of 2:1, synthesis pH of 10, preparation temperature of 30 °C and aging temperature of 25 °C, had better Gly adsorption performance due to its enhanced crystallinity and hierarchical porosity. Moreover, the Gly adsorption process optimization with LDHs-400-MgAl via the response surface methodology (RSM) was studied. The relative error between the actual value and the predicted value obtained from the RSM model is 0.39 % and the determination coefficient (R 2 ) is 0.9987, which means the Gly adsorption process with LDHs-400-MgAl can be predicted by the proposed RSM model. This work integrates material synthesis optimization with process engineering, offering a scalable strategy for Gly removal in complex wastewater matrices.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 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）