CATALYSIS COMMUNICATIONS
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2019
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IF 3.674
Yan Xu,Yan Wang,Chenguang Wu,Huijiang Huang,Ying Zhang,Jun Nan,Haibin Yu,Yujun Zhao
Activated carbon with different microporous surface area were used to prepare a series of Ru/AC catalysts for the hydrogenation of dioctyl phthalate (DOP) to dioctyl 1,2-cyclohexanedicarboxylate (DOCH). The presence of micropores benefit the dispersion of Ru, but Ru particles encapsulated into the micropores can be hardly accessed by DOP molecule. An appropriate microporous surface area of the support should be crucial important for the preparation of highly efficient catalyst for phthalates hydrogenation. The as-prepared 0.45%Ru/AC-2 catalyst (Micropore surface area = 604 m 2 /g) exhibited the best activity in DOP hydrogenation with a TOF of 1406 h −1 due to its suitable micropore surface area.
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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2016
·
IF 3.205
Deqing Mei,Yanbing Feng,Miao Qian,Zichen Chen
To improve the energy conversion of a micro-channel reactor, an innovative micro-channel catalyst support with a micro-porous surface is proposed and fabricated by a layered powder sintering and dissolution method (LPSDM). The catalyst adhesion strength is analyzed by an ultrasonic vibration test and results show the catalyst has a 7 wt. % loss on the catalyst support with micro-porous surface and a 16 wt. % loss on the non-porous surface. Subsequently, the coated catalyst support is applied to methanol steam reforming for hydrogen production . Results show that the micro-channel catalyst supports with micro-porous and non-porous surfaces respectively have a hydrogen production rate of 18.07 ml/min and 9.65 ml/min at 573 K under the inlet flow rate of 30 μl/min. Compared with the catalyst support with a non-porous surface, the catalyst support with a micro-porous surface shows better catalyst adhesion and obvious advantages in hydrogen production rate and methanol conversion.
研究领域:
化学工程
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能源科学
✓ 已验证
DOI
高影响因子
Materials Today Chemistry
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2022
·
IF 7.613
Q. Peng,H. Zhao,R. Wang,X. Cao,H. Liu,Q. Liu
Metal-doped porous organic polymers often display unique properties for applications in gas uptake owing to the incorporation of the metal elements in the polymer networks . In this study, a series of novel ferrocene-based hypercrosslinked polymers were prepared by phenolic polycondensation (Fc-PR-HCPs). To generate the hypercrosslinked polymers, 1,1′-ferrocenedicarboxaldehyde (Fc(CHO) 2 ) and bisphenol A (BPA) were used as the building blocks. The maximum value of BET and micropore surface area is determined to be 1111.4 and 487.4 m 2 /g for Fc-PR-HCP3. A significant H 2 adsorption capacity of 3.11 wt% was achieved for Fc-PR-HCP3 at 77 K/1.0 bar, which was noted to be higher than the porous organic polymers with even higher BET surface area value. The high micropore surface area value and the adsorption sites (aromatic rings and metal ion-active sites) provided by two building blocks were used to explain the significant H 2 adsorption capacity successfully. Overall, the findings from this study indicate that Fc-PR-HCPs highlighted prospective applications in the field of H 2 capture.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
Biomaterials Science
·
2022
·Vol. 10
·期 15
·4243-4256
·
IF 7.59
Rames Kaewmanee,Fan Wang,Yongkang Pan,Shiqi Mei,Jirut Meesane,Fengqian Li,Zhaoying Wu,Jie Wei
Implanted materials with both osteogenic and antibacterial functions are promising for facilitating osteointegration and preventing infection for orthopedic applications. In this work, we synthesized flower-like molybdenum disulfide (fMD) submicro-spheres containing nanosheets, which were incorporated onto the microporous surface of polyimide (PI) via concentrated sulfuric acid, suspending fMD contents of 5 wt% (SPM1) and 10 wt% (SPM2). Compared with sulfonated polyimide (SPM0), both SPM1 and SPM2 with microporous surfaces containing fMD exhibited nano-submicro-microporous surfaces, which improved the surface roughness, wettability, and surface energy. Due to there being more fMD submicro-spheres on the microporous surface, SPM2 revealed a better antibacterial effect than SPM1. In addition, compared with SPM1 and SPM0, SPM2 with more fMD significantly promoted rat bone marrow-derived stromal cell response in vitro. Moreover, SPM2 remarkably enhanced new bone formation and osteointegration in vivo. In summary, the combination of fMD with the microporous surface of SPM2 resulted in a nano-submicro-microporous surface with optimized surface performance, which possessed not only osteogenic bioactivity but also an antibacterial effect. As a bone implant, SPM2 with osteogenic and antibacterial functions may have enormous potential as a bone tissue substitute.
研究领域:
材料科学
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生物材料
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骨科
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Biomaterials Advances
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2022
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IF 0
Shihui Liu,Junchao Zhi,Yao Chen,Zhuoyue Song,Lin Wang,Chunzhi Tang,Shijie Li,Xiaoping Lai,Nenggui Xu,Tao Liu
Vascular stents are widely used in the clinical treatment of coronary heart disease, but the long-term safety still needs to be improved. Surface biological functional modification is an effective way to improve the biocompatibility and clinical performance of cardiovascular materials, but how to achieve long-term effective and precise regulation of in situ vascular intimal repair through the reasonable construction of the surface physical and chemical structure is still an important task in the current surface modification research. In this study, ECM-derived components, including laminin, heparin, and SDF-1, were incorporated into the titanium surface with a microporous structure. It was found that the modified surface could effectively control the continuous release of biomolecules. In vitro biocompatibility evaluation results showed that the constructed functional layer could effectively inhibit the activation of platelet adhesion and excessive proliferation of smooth muscle cells. In addition, the modified surface also showed the potential to induce rapid regeneration of vascular endothelium. In vivo animal tests further proved that the modified sample may contribute to inhibiting vascular intimal hyperplasia. This study provided a new approach for the surface biological function modification of Ti-based vascular stents.
研究领域:
生物医学工程
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材料科学
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心血管医学
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组织工程
✓ 已验证
DOI
PubMed
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