Catalysts
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2020
·Vol. 10
·期 1
·138
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IF 3.52
Di Wu,Kequan Xia,Chengzhu Fang,Xuegang Chen,Ying Ye
Azo dyes are the most widely used synthetic dyes in the printing and dyeing process. However, the discharge of untreated azo dyes poses a potential threat to aqueous ecosystems and human health. Herein, we fabricated a novel heterogeneous catalyst: activated-carbon-fiber-supported ferric alginate (FeAlg-ACF). Together with peroxymonosulfate (PMS) and visible light, this photocatalytic oxidation system was used to remove an azo dye—azophloxine. The results indicated that the proposed catalytic oxidation system can remove 100% of azophloxine within 24 min, while under the same system, the removal rates were only 92% and 84% when ferric alginate was replaced with ferric citrate and ferric oxalate, respectively, which showed the superiority of FeAlg-ACF. The degradation of azophloxine is achieved by the active radicals (SO4•−and •OH) released from PMS and persistent free radicals from activated carbon fiber. Moreover, due to ferric alginate’s highly intrinsic photosensitivity, visible radiation can further enhance the ligand-to-metal charge transfer (LMCT) processes. After 24 min of treatment, the total organic carbon of the azophloxine solution (50 μmol/L) decreased from 1.82 mg/L to 79.3 μg/L and the concentration of nitrate ions increased from 0.3 mg/L to 8.6 mg/L. That is, up to 93.5% of azophloxine molecules were completely degraded into inorganic compounds. Consequently, potential secondary contamination by intermediate organic products during catalytic degradation was prohibited. The azophloxine removal ratio was kept almost constant after seven cycles, indicating the recyclability and longevity of this system. Furthermore, the azophloxine removal was still promising at high concentrations of Cl−, HCO3−, and CO32−. Therefore, our proposed system is potentially effective at removing dye pollutants from seawater. It provides a feasible method for the development of efficient and environmentally friendly PMS activation technology combined with FeAlg-ACF, which has significant academic and application value.Keywords:peroxymonosulfate;ferric alginate;activated carbon fiber;visible radiation;heterogeneous photocatalysis
研究领域:
环境科学
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化学工程
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材料科学
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DOI
高影响因子
CATALYSIS LETTERS
·
2019
·Vol. 149
·期 3
·882-890
·
IF 2.372
Zhang Lu,Yu Deyou,Wu Minghua,Lin Junxiong
Abstract In order to improve the photocatalytic degradation performance of Ag 3 PO 4 and reduce the cost of photocatalyst made of Ag 3 PO 4 , a kind of Ag 3 PO 4 /TiO 2 composite was successfully fabricated via a simply precipitation method for the Ag 3 PO 4 nanoparticles being loaded on the surface of commercial titanium dioxide (P25) to form a heterostructure. The Ag 3 PO 4 /TiO 2 composite were characterized by FT-IR, XRD, XPS, FE-SEM, HR-TEM, DRS and PL and applied for the degradation of formaldehyde solution under solar radiation. The results showed that the degradation rat of Ag 3 PO 4 /TiO 2 composite (0.01796 min −1 ) was much higher than that of pure Ag 3 PO 4 (0.00775 min −1 ), indicating that the Ag 3 PO 4 /TiO 2 composite possessed better photocatalytic degradation activity for the formaldehyde solution than pure Ag 3 PO 4 . The composite significantly decreased the dosage of silver for photocatalyst under solar radiation, thereby reduced the cost of the photocatalyst made from silver. Graphical Abstract
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
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2024
·Vol. 99
·期 4
·978-988
·
IF 2.8
Likai Dai,Zheng Fang,Anxian Peng,Yunhong Chen,Yitong Liu,Huimei Chen,Rongjun Yan,Rencheng Zhou,Mingming Du
BACKGROUND Photothermal catalytic oxidation technology for synthesis of high value-added chemicals has become a hot topic of research at home and abroad. As a special structure, titania (TiO 2 ) nanotubes (Ti-NTs) possess larger specific surface area and adsorption capacity, which have shown great application prospects in photothermal catalytic oxidation. RESULTS In this work, high-performance palladium (Pd-Ti-NTs catalyst were prepared and applied to the photothermal catalytic oxidation of 5-hydroxymethyl (HMF) and benzyl alcohol. The photothermal dependence on catalytic activity and selectivity of HMF and benzyl alcohol oxidation was studied in detail. The results revealed that compared with thermal catalytic oxidation, the catalysts showed significantly higher conversions of both benzyl alcohol and HMF under light. in particular, HMF conversion increase from 55.6% to 99.7%. Aldehyde oxidation is inhibited by alcohol and can be dramatically promoted by light radiation. This is probably because alcohol can inhibit the adsorption of aldehyde, and this inhibiting effect is weakened through light radiation, thus promoting the oxidation of aldehydes. Therefore, the selectivity of the final products 2,5-furandicarboxylic acid (FDCA) and benzoic acid were dramatically increased in both systems under light radiation, and the selectivity for FDCA was obviously increased from 5.8% to 61.3%, and the yield reached 61.0%, which is higher than that of most of the reported Pd-TiO 2 -based catalysts for FDCA. CONCLUSIONS In this paper, we verify that Pd-Ti-NTs could preferentially promote the conversion of aldehydes to acids in the presence of light, and obtained catalysts with high catalytic performance and high stability for benzyl alcohol and HMF oxidation. © 2024 Society of Chemical Industry (SCI).
研究领域:
催化
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材料科学
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化学工程
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纳米技术
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Hongyao Li,Xinyu Gao,Zidan Luo,Subhan Mahmood,Enming Liu,Shun Yao
A ZrC@DES nanofluid system based on different deep eutectic solvents (DESs) and Zirconium carbide (ZrC) nanoparticles was synthesized for green extraction of cepharanthine (CEP) for the first time. The basic properties of DESs were explored and the prepared nanofluid system was characterized with a series of ways. As the key performance, the photothermal conversion performance of the latter was investigated in details as well as its stability. On the basis of above results, a novel extraction method for CEP under near-infrared light radiation was established, and the effects of various factors on its extraction yield were systematically studied under optimized conditions. The final yield of CEP reached 7.2978 mg/g, which was approximately four times higher than that of traditional heating method with ethanol. The Fick’s model could be well applied to fit the kinetic data; CEP was recovered and the components of nanofluid system were reused through the developed post-treatment procedures. Finally, the friendliness and low risk were proved by Zebrafish experiment. The whole study aimed to provide new reference for the extraction of natural bioactive products through energy conversion.
研究领域:
药学
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纳米技术
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植物化学
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产品关联
DOI
高影响因子
Journal of Coatings Technology and Research
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2021
·Vol. 18
·期 4
·1109-1116
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IF 2.382
Huang Dijun,Ren Yongxia,Yang Ruoning,He Zhiguo,Yao Youwei
A novel ultraviolet (UV)/thermal dual-curing thiol-ene/polyurethane acrylate (PUA) coating of PUA oligomer, tripropylene glycol diacrylate, 2,4,6-trimethylbenzoyldiphenyl phosphine oxide, and trimethylolpropane tris (3-mercaptopropionate) was prepared. The coating had a rapid surface drying rate with UV radiation (400 W, 50 W/cm 2 ). For example, the surface of the novel thiol-ene/PUA coating dried within 3 s. The hardness, gel content, and initial decomposition temperature at 5 wt% weight loss of the UV/thermal dual-cured sample after 10 min of UV irradiation, followed by heating at 150°C for 20 min, were 37 D, 90.3%, and 302.2°C, respectively, which were higher than the 30 D, 87.7% and 284.9°C of the UV curing control after 10 min of UV irradiation. The curing time of the 1-mm-thick coating was 4.5 min in indoor sunlight (2.3 ± 0.3 mW/cm 2 ) with a gel content of 83.8%. This coating could be applied in the rapid prototyping field with UV or sunlight exposure. Thermal treatment after UV curing could increase the crosslinking degree and influence the sample performance.
研究领域:
材料科学
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高分子化学
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涂料技术
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产品关联
DOI
高影响因子
JOURNAL OF CONTROLLED RELEASE
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2016
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IF 7.441
Wenjun Zhang,Feihu Wang,Yun Wang,Jining Wang,Yanna Yu,Shengrong Guo,Rongjun Chen,Dejian Zhou
A thiolated pH-responsive DNA conjugated gold nanorod (GNR) was developed as a multifunctional nanocarrier for targeted, pH-and near infrared (NIR) radiation dual-stimuli triggered drug delivery. It was further passivated by a thiolated poly(ethylene glycol)-biotin to improve its cancer targeting ability by specific binding to cancer cell over-expressed biotin receptors. Doxorubicin (DOX), a widely used clinical anticancer drug , was conveniently loaded into nanocarrier by intercalating inside the double-stranded pH-responsive DNAs on the GNR surface to complete the construction of the multifunctional nanomedicine . The nanomedicine can rapidly and effectively release its DOX payload triggered by an acidic pH environment (pH ~ 5) and/or applying an 808 nm NIR laser radiation. Compared to free DOX, the biotin-modified nanomedicine displayed greatly increased cell uptake and significantly reduced drug efflux by model multidrug resistant (MDR) breast cancer cell lines (MCF-7/ADR). The application of NIR radiation further increased the DOX release and facilitated its nuclear accumulation. As a result, this new DNA-GNR based multifunctional nanomedicine exerted greatly increased potency (~ 67 fold) against the MDR cancer cells over free DOX.
研究领域:
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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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）