RENEWABLE ENERGY
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2021
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IF 8.001
Dongming Li,Wenping Feng,Chao Chen,Shangxing Chen,Guorong Fan,Shengliang Liao,Guoqiang Wu,Zongde Wang
An effective approach for synthesizing green and sustainable biodiesel fuel from low-value vegetable oils has been explored. Herein, a series of catalysts of zinc supported on zirconia ( x Zn/ZrO 2 ) were successfully synthesized, characterized, and applied for the production of biodiesel from Litsea cubeba kernel oil (LCKO) through the transesterification process. The results showed that the monoclinic phase structure of the prepared catalysts transformed to the more stable tetragonal phase structure after supporting different Zn loadings (≥5%). Compared with the pure ZrO 2 , the highly dispersed Zn species on the surface of x Zn/ZrO 2 could be divided into Zn oxide and ZnOH + , which could promote the transesterification of LCKO. Thus, the 7%Zn/ZrO 2 catalyst exhibited the best catalytic activity of the LCKO conversion 82.5%, which was attributed to the positive effects of both the ZrO 2 support and Zn species. Furthermore, the various reaction parameters (such as reaction time, stirring rate, n CH3OH :n LCKO , catalyst amount, and reaction temperature) were investigated systematically and optimized carefully. And a possible mechanism of the transesterification process catalyzed by Zn/ZrO 2 catalysts was also proposed. Finally, the physical properties of the as-synthesized biodiesel accorded with the current international biodiesel standards.
研究领域:
化学工程
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可再生能源
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催化科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
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2020
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IF 5.006
Xuefei Wang,Yong Men,Jinguo Wang,Shuang Liu,Qiaoling Song,Mei Yang
Catalytic transformation of ethanol has been studied over a series of MgO-SiO 2 composite catalysts with different ZnO loadings. Vast differences in product selectivity are obtained by varying ZnO loadings in enabling the control over product distribution. Our results reveal that MgO-SiO 2 composite catalysts with low ZnO loadings tend to show an enhanced efficiency for C C bond coupling and exceptionally high selectivity to 1,3-butadiene whereas the high ZnO loadings favor the formation of acetaldehyde via dehydrogenation. Thorough analysis of characterization results via XRD, BET, IR, TPD, and 29 Si MAS NMR indicates that ZnO loading influences the extent of MgO and SiO 2 interaction during preparation, and the surface acid-base chemistry, which were both found to correlate with the catalytic performance. This study proposes that the Mg O Si interfacial structure formed by the strong MgO and SiO 2 interaction at low ZnO loadings is of prime importance for the formation of 1,3-butadiene, benefiting from the desirable properties of balanced dehydrogenation and C C bond coupling while excess ZnO loadings destroy the Mg O Si interfacial bonds over the MgO-SiO 2 composite catalysts, which are the key structures required for C C bond growth.
研究领域:
催化化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2025
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IF 11.3
Cheng Liao,Dachao Ma,Qisong Zhong,Wenfeng Ya,Mengyue Chen,Dongbo Wang,Zheng Liu,Qingge Feng
Hydrothermal carbonization (HTC) is a promising approach for dechlorination of PVC plastic wastes. However, the high dechlorination temperature is one of the key obstacles to the application of it. This work introduced Zn 2 + and urea into the hydrothermal process to lower the dechlorination temperature of PVC plastic and investigated the photocatalytic performance of the derived zinc-loaded solid products. It was revealed that Zn 2+ and urea acted synergistic effects to open up the porous structures and prevent PVC particle agglomeration, so as to facilitate the penetration of hydroxyl and Zn 2+ in to the particles, catalyzing the elimination and substitution of PVC. Particularly, it achieved a remarkable dechlorination efficiency of 99.96 % by HTC at 200 °C in 120 min. By modulating the hydrothermal parameters, the Zn 5 (OH) 6 (CO 3 ) 2 was simultaneously loaded onto the PVC-derived porous hydrochar. After that, the zinc-loaded hydrochar was pyrolyzed into a porous ZnO-C composite material. Serving as a carbon dopant source, the PVC-derived hydrochar reduced the band gap of ZnO, broadening its light absorption range. Benefiting from this bandgap narrowing and extended light absorption, the ZnO-C composite achieved 92.22 % degradation efficiency for TMX in aqueous solution under simulated natural light and maintained high activity over 5 cycles (retaining ∼70.17 % efficiency). This work pioneered a pathway for low-temperature hydrothermal dechlorination of PVC and demonstrated the potential practical application of the derived ZnO-C composites in photocatalysis.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2015
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IF 2.587
Yujia Xie,Fengyong Zhang,Pingle Liu,Fang Hao,Hean Luo
Direct functionalization of saturated C–H bonds by metalloporphyrin catalysts is among the topical and challenging areas within the chemical industry and synthetic chemistry. In this work, supported CoD(p-Cl)PPCl metalloporphyrin catalysts were prepared and characterized. It has been found that the CoD(p-Cl)PPCl/ZnO catalyst shows better catalytic activity than the supported catalyst (ZrO2, MCM-41, kaolin, Zr(OH)2, and boehmite (BM)) in cyclohexane oxidation with dioxygen. The effects of the reaction pressure, reaction temperature, and reaction time on the catalytic activity were considered by the supported CoD(p-Cl)PPCl/ZnO catalyst. The CoD(p-Cl)PPCl/ZnO catalyst can be facilely recovered and was recycled up to seven times without a significant decrease in catalytic performance. The average cyclohexane conversion and selectivity to KA oil are 10.98% and 84.34%, respectively, and the turnover number is 2.10 × 107.
研究领域:
催化化学
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有机合成
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工业化学
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材料化学
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绿色化学
✓ 已验证
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
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2025
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IF 6.9
Xiaoqiang Fan,Yushan He,Yue Liu,Ying Huang,Minhao Zhu
ZnO-loaded graphene oxide (GO@ZnO) heterostructure was synthesized via a one-step hydrothermal method and incorporated as nanofillers into water-borne epoxy coatings (EP). Incorporating 1.0 wt% GO@ZnO, identified as the optimal loading, significantly enhances the UV resistance of EP and reduces the wear rate by 82.0 % compared to pure epoxy. The tribological improvement stems from synergistic effects between GO and ZnO, validated by DFT calculations showing strong interfacial interaction. Moreover, the well-dispersed GO@ZnO heterostructure enhances stability and load-bearing capacity of composite coating. This work advances heterostructure nano-composites design for practical protective applications.
研究领域:
材料科学
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纳米技术
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表面工程
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涂层技术
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
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2024
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IF 7.6
Zhiqiang Jia,Dini Lin,Chengxuan Tang,Xiaoliang Sun,Lingling Cao,Liangle Liu
Bacterial infection is one of the main causes of delayed wound healing. Hence, the development of antimicrobial dressings with good biocompatibility has high clinical significance and social value. The natural macromolecule, serum albumin, has superior biocompatibility, low immunogenicity, and a good drug-carrying capacity. In this study, human serum albumin (HSA) was modified with methacrylic anhydride to obtain photo-crosslinking properties. Then, the photo-crosslinking HSA was applied to produce homogenized microspheres (HMS) through the nitrogen elution-assisted microfluidic technique and ultraviolet light. Effective loading of vascular endothelial growth factor (VEGF) was achieved by utilizing the adsorption of HSA onto zinc ions and their crosslinking with His-tagged VEGF. The prepared HMS-Zn@VEGF exhibited broad-spectrum antibacterial activity and simultaneously exerted proangiogenic effects in vitro , effectively promoting the healing of infected wounds in rats. In vivo experiments using rats showed that HMS-Zn@VEGF promoted the deposition of collagen around the wound, improved the local inflammatory response, and promoted angiogenesis. In conclusion, our prepared HMS-Zn@VEGF microspheres have good biocompatibility, antimicrobial properties, and angiogenic ability, which can be used for infected wound healing.
研究领域:
生物医学工程
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药剂学
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伤口愈合
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材料科学
✓ 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）