JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Kunlin Li,Jiayu Feng,Xingguang Hao,Xin Song,Changbin Zhang,Ping Ning,Kai Li
In this study, CuO@SiO 2 core-shell catalysts were successfully synthesized and applied to efficiently remove hazardous gaseous pollutant arsine (AsH 3 ) by catalytic oxidation under low-temperature and low-oxygen conditions for the first time. In typical experiments, the CuO@SiO 2 catalysts showed excellent AsH 3 removal activity and stability under low-temperature and low-oxygen conditions. The duration of the AsH 3 conversion rate above 90 % for the CuO@SiO 2 catalysts was 39 h, which was markedly higher than that of other catalysts previously reported in the literature. The considerable catalytic activity and stability were attributed to the protection and confinement effects of the SiO 2 shell, which resulted in highly dispersed CuO nanoparticles . Meanwhile, the strong interaction between the CuO core and SiO 2 shell further facilitated the formation of active species such as coordinatively unsaturated Cu 2+ and chemisorbed oxygen. The accumulation of oxidation products (As 2 O 3 and As 2 O 5 ) on the interface between the CuO core and SiO 2 shell and the pore channels of the SiO 2 shell is the main cause of catalysts deactivation . Furthermore, through combined density functional theory (DFT) calculations and characterization methods, a reaction pathway including gradual dehydrogenation (AsH 3 *→AsH 2 *→AsH*→As*) and gradual oxidation (2As*→As*+AsO*→2AsO*→As 2 O 3 ) for the catalytic oxidation of AsH 3 on CuO (111) surface was constructed to clarify the detailed reaction mechanism. The CuO@SiO 2 core-shell catalysts applied in this study could provide a powerful method for developing AsH 3 catalysts from multiple know AsH 3 removal systems.
研究领域:
环境科学
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催化化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Scientific Reports
·
2015
·Vol. 5
·期 1
·1-8
·
IF 5.578
Niu Xiaoyu,Zhao Tieying,Yuan Fulong,Zhu Yujun
The hollow CuO@SiO 2 spheres with a mean diameter of 240 nm and a thin shell layer of about 30 nm in thickness was synthesized using an inorganic SiO 2 shell coating on the surface of Cu@C composite that was prepared by a two-step hydrothermal method. The obtained hollow CuO@SiO 2 spheres were characterized by ICP-AES, nitrogen adsorption-desorption, SEM, TEM, XRD, H 2 -TPR, CO-TPR, CO-TPD and NO-TPD. The results revealed that the hollow CuO@SiO 2 spheres consist of CuO uniformly inserted into SiO 2 layer. The CuO@SiO 2 sample exhibits particular catalytic activities for CO oxidation and NO + CO reactions compared with CuO supported on SiO 2 (CuO/SiO 2 ). The higher catalytic activity is attributed to the special hollow shell structure that possesses much more highly dispersed CuO nanocluster that can be easy toward the CO and NO adsorption and the oxidation of CO on its surface.
研究领域:
材料化学
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催化化学
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纳米材料科学
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环境催化
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无机合成
✓ 已验证
DOI
高影响因子
TRANSITION METAL CHEMISTRY
·
2024
·Vol. 49
·期 3
·195-213
·
IF 1.6
Gharbi Ahlam Hacine,Hemmami Hadia,Laouini Salah Eddine,Bouafia Abderrhmane,Ben Amor Ilham,Zeghoud Soumeia,Gherbi Mohammed Taher,Ben Amor Asma,Alharthi Fahad,Abdullah Johar Amin Ahmed
A novel CuO–SiO 2 nanoadsorbent, incorporating copper oxide (CuO) and silicon dioxide (SiO 2 ), has been successfully synthesized using three distinct preparation processes: Mode-A (solution and solution), Mode-B (solution and nanoparticles), and Mode-C (nanoparticles and nanoparticles). The investigation focuses on evaluating the efficiency of the CuO–SiO 2 nanoadsorbent, considering its synthesis process, reusability, and sustained performance over time, particularly in the removal of Rose Bengal dye. Characterization results revealed the formation of CuO–SiO 2 nanocomposites structure irregular shapes morphology across all three-preparation processes. The average particle sizes for Mode-A, Mode-B, and Mode-C nanocomposites were determined as 18.1 nm, 15.6 nm, and 14.8 nm, respectively. Furthermore, the band gap energies of the CuO–SiO 2 nanocomposites were measured at 2.2 eV, 1.8 eV, and 3.29 eV for Mode-A, Mode-B, and Mode-C, respectively. Remarkably, the CuO–SiO 2 nanocomposite prepared using Mode-B demonstrated superior photocatalytic activity in degrading the anionic dye Rose Bengal, achieving a degradation coefficient of 84.8%. In comparison, CuO NPs, tested under the same experimental conditions (120 min contact time, pH = 7, temperature of 25 °C, and solar light irradiation), achieved a degradation coefficient of 78.8%. These findings highlight the potential of the CuO–SiO 2 nanoadsorbent, particularly when synthesized via Mode-B, for effective and environmentally friendly dye degradation applications.
研究领域:
纳米技术
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环境科学
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材料科学
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光催化
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水处理
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Simin He,Wentong Liu,Hui Zheng,Ruibin Guo,Nijuan Liu,Zunli Mo
Study on polyphenylene sulfide coating with superhydrophobic and anti-corrosion has been made a significant enhancement, yet few of them have been applied to antibacterial research. This research innovatively compounded polyphenylene sulfide (PPS) with CuO/SiO 2 nano filler, superhydrophobic and anti-corrosion CuO/SiO 2 /PPS coating with antibacterial effect was obtained by air spraying. Through the test, the water contact angle of the composite coating reached 151.51 ± 1°, and the sliding angle decreased to 5 ± 1°. The electrochemical corrosion current density of the composite coating is 4 orders of magnitude lower than that of bare iron sheet, and the impedance reaches 780,740 Ω cm 2 . After testing in acid, alkaline and salt solutions, the composite coating still shows promising chemical stability. Meanwhile, it shows positive performance in anti fouling and adhesion. Most importantly, the composite coating has a good inhibitory effect on the growth of Escherichia coli , Bacillus subtilis and Staphylococcus aureus , confirming the good synergistic effect of CuO and PPS. This work provides a new strategy for the multifunctional PPS composite coating.
研究领域:
材料科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2015
·
IF 3.391
Tian Gan,Zhaoxia Shi,Danyang Hu,Zhen Lv,Junyong Sun,Yanming Liu
In this paper, we report a facile route to synthesize yolk–shell structured copper oxide@silica oxide (CuO@SiO 2 ) spheres and their application to construct an electrochemical Formoterol fumarate (FF) sensor. The CuO@SiO 2 was characterized by means of Fourier transform infrared spectroscopy, X-ray powder diffraction, Raman spectroscopy, scanning electron microscopy, and transmission electron microscopy. Further, FF was electrocatalytically oxidized at the CuO@SiO 2 film modified glassy carbon electrode (GCE), which led to a sensitive determination of FF. The oxidation current of FF was linear with concentration in the range of 0.030–10 μM and the detection limit was found to be 5.0 nM (S/N = 3). The observed analytical parameters such as wide linear range, low detection limit and short response time were superior to previously reported FF sensors. Finally, it was demonstrated that the proposed sensor could be used for the selective determination of FF present in swine feed and tissues.
研究领域:
材料科学
·
电化学
·
分析化学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Longlong Geng,Gang Li,Xiuling Zhang,Xiangmei Wang,Chunhui Li,Zhongmin Liu,Da-Shuai Zhang,Yong-Zheng Zhang,Guangyin Wang,Haixiang Han
Morphology and surface property are critical property-defining factors for metal oxide catalysts, therefore, the rational engineering on these aspects is considered as the effective means to enhance their overall catalytic activities. In this work, a silicon oxide (SiO 2 ) with hierarchical structure was successfully prepared and applied as carrier for the design of SiO 2 -supported copper oxide catalysts (CuO/SiO 2 -x, x represents treating temperature of SiO 2 during preparation). The morphology and composition of thus-obtained catalysts were characterized by XRD , SEM, HRTEM , XPS , FTIR , contact angle and N 2 adsorption. Interestingly, even with relatively large CuO particles , excellent activity was also achieved in hydrogenation of nitrophenol under relatively mild conditions (25 °C and 1 atm). Over the optimal CuO/SiO 2 -800 catalyst, the 4-nitrophenol (4-NP) conversion reached 99% in 60 s and its hydrogenation rate was about 9.2 times that of bare CuO catalyst. Additionally, it could also be reused for at least eight times without obvious fading in efficiency. The excellent catalytic performance can be attributed to the synergy between surface-anchored structure in which more active sites can be exposed, and hydrophilic surface to promote the adsorption and diffusion of substrate molecules during hydrogenation process.
研究领域:
催化化学
·
材料科学
✓ 已验证
DOI
高影响因子
Frontiers in Bioengineering and Biotechnology
·
2023
·
IF 5.7
Feng Yanping,Wu Mingzhen,Zhang Haidong,Xu He,Li Huili,Chen Dongmin,Jiang Hongyi,Chang Jiang,Dong Zhihong,Yang Chen
In clinical practice, the utilization of antibiotics is still the main approach for the treatment of wound contamination, which lacks the ability to accelerate wound healing and arises the global concern of antimicrobial resistance. Plenty of alternative methods have been explored in recent years due to the fast development of material science. Here, CuO/SiO2 nanowires (CuSi NWs) with good near-infrared (NIR) photothermal conversion ability are synthesized by a one-step hydrothermal method. The as-prepared CuSi NWs possess excellent antibacterial ability against both Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), which could be enhanced by the assistance of mild photothermal therapy (PTT). Moreover, CuSi NWs at suitable concentrations can promote proliferation, migration, and angiogenic gene expression of human umbilical vein endothelial cells (HUVECs), exhibiting a remarkable pro-vascularization ability. The in vivo mouse infect model further proves that the CuSi NWs might be a good candidate for the treatment of infected wounds as the high antibacterial efficiency and accelerated wound healing is obtained.
研究领域:
材料科学
·
生物医学工程
·
伤口愈合
·
抗菌治疗
✓ 已验证
DOI
PubMed
高影响因子
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