POLYMER COMPOSITES
·
2023
·Vol. 44
·期 11
·7499-7509
·
IF 5.2
Jian Li,Jing Sun,Lulu Ren,Ting Lei,Juan Li,Jinbo Jin,Shanshan Luo,Shuhao Qin,Chengtao Gao,Ting Lei
The non-solvent induced phase separation technology was introduced to formulate titanium dioxide (TiO 2 )-hydroxyapatite (HAP) composite modified polyvinylidene fluoride (PVDF) ultrafiltration (UF) membranes, and research was conducted to explore the effect on PVDF UF membrane performance exerted by different addition amounts (0–1.0 wt%) of TiO 2 -HAP composite. The results indicated that when 0.3% TiO 2 -HAP composite was added, the composite membranes had a through-channel structure, with a uniform pore structure on the surface, so that they possessed a certainly raised pure water flux. Specifically, in contrast to the pure PVDF membrane, 0.3%-TiO 2 -HAP@PVDF UF membrane exhibited an incremented pure water flux by 59.09%. Besides, TiO 2 -HAP@PVDF UF membranes had decreased rejection rate of bovine serum albumin (BSA) together with water contact angle to 58.62% and 70.17°, respectively, compared to the pure PVDF membrane (85.52% & 92.75°), showing good hydrophilicity. Several pure water flux tests on the composite UF membranes revealed that the flux tended to be stable after the 4th test. In summary, the addition of TiO 2 -HAP composite is capable of efficiently ameliorating PVDF base membranes from the aspects of microstructure, hydrophilicity, antifouling properties, as well as stability, allowing a good application prospect in actual water treatment. Highlights The HAP can solve the poor adsorption of TiO 2 . The TiO 2 can improves the interfacial adhesion between HAP and polymer. The TiO 2 -HAP composite with excellent stability, corrosion resistance and et al. The TiO 2 -HAP@PVDF UF membrane with anti-pollution performance and stability.
研究领域:
材料科学
·
环境工程
·
膜技术
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2016
·
IF 5.267
Fan Wang,Zehui Zhang
Catalytic transfer hydrogenation of the C═O bond has been considered to be one of the most important processes for the synthesis of fuels and chemicals. In this study, we have developed a metal-free transfer hydrogenation of furfural into furfuryl alcohol and some other valuable carbonyl compounds into alcohols as the hydrogen donors. Hydroxyapatite-encapsulated magnetic γ-Fe2O3 (γ-Fe2O3@HAP) acted as a magnetic base to promote this transfer hydrogenation with iso-propanol as the hydrogen donor. The catalytic performance of the γ-Fe2O3@HAP catalyst was greatly affected by the structure of alcohol. iso-Propanol was the best hydrogen donor for the transfer hydrogenation. In addition, the reaction temperature and the catalyst loading also affected this reaction. The highest yield of furfuryl alcohol reached 91.7% at a furfural conversion of 96.2%. Furthermore, this method was also useful for the transfer hydrogenation of other important carbonyl compounds into value-added chemicals and fuels. After the reaction, the γ-Fe2O3@HAP catalyst could be easily collected with the assistant of a magnet, and reused for six runs without the loss of its catalytic activity.
研究领域:
化学工程
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Wei Peng,Xiancai He,Xianlin Chen,Yishuo Zhang,Chunpei Yan,Zhongsheng Chen,Guolin Huang
The combination of adsorption and photocatalysis offers a synergistic strategy for enhanced U(VI) removal. In this study, g-C 3 N 4 /HAP composites were synthesized via a hydrothermal method to achieve efficient U(VI) removal. Hydroxyapatite (HAP) provides abundant adsorption sites for rapid U(VI) enrichment, while graphitic carbon nitride (g-C 3 N 4 ) exhibits excellent visible-light response, enabling the photocatalytic reduction of U(VI) to U(IV). The heterojunction formed between HAP and g-C 3 N 4 effectively suppresses electron-hole recombination, facilitating electron transfer and narrowing the band gap. Characterization revealed that the composite achieved a U(VI) removal efficiency of 99.28 % and a maximum adsorption capacity of 4880.95 mg/g, 1.85 times higher than single-component systems. Under solar light, photogenerated electrons in g-C 3 N 4 reduce U(VI) via interaction with dissolved oxygen to form superoxide radicals (· O 2 − ). This synergistic mechanism enhances photocatalytic performance and adsorption efficiency. The material exhibited excellent stability over multiple cycles, demonstrating its practical potential for environmental remediation. This study highlights the g-C 3 N 4 /HAP composite as a promising solar-driven material for efficient U(VI) removal, providing a sustainable and effective solution for uranium-contaminated water treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2021
·
IF 3.605
Shuang Yao,Tong Zhang,Xiaoyu Tang,Delong Li,Weihao Zhang,Dong Lin,Ruiying Li,Hao Yan,Yibin Liu,Xiang Feng,Xiaobo Chen,Xin Zhou,Chaohe Yang
As a potential alternative for fossil feedstocks, renewable natural oils are highly desirable for producing fuels or high added-value chemicals. Herein, catalytic transfer hydrogenation of methyl stearate to octadecanol using methanol and water as hydrogen donors was investigated over Co/hydroxyapatite (HAP) catalysts synthesized by distinct methods. Multicharacterizations revealed that the strong interaction between Co and the HAP support of the Co/HAP catalysts could enhance the electron transferability, resulting in the excellent methyl stearate conversion (94.8%) and octadecanol selectivity (67.7%) at 290 °C in 5 h. The characterizations and density functional theory (DFT) calculations confirmed that the combined Co0/Coδ+ active sites could synergistically boost the generation of H2 and the hydrogenation of methyl stearate in the methanol/water system. In addition, the effects of various reaction conditions (e.g., the amount of methanol, reaction temperature, reaction time, and catalyst loading) were investigated in detail to understand the plausible reaction pathways. The results may have guiding significance on designing catalysts for efficient conversion of fatty acid methyl esters.
研究领域:
化学工程
·
催化科学
✓ 已验证
DOI
高影响因子
Russian Journal of Physical Chemistry A
·
2019
·Vol. 93
·期 7
·1343-1348
·
IF 0.581
Liang An,Zhao Xiaolian,Xu Chengkang,Yan Zhaoxiong,Yang Zhihua,Xu Zhihua
Abstract In this work, magnetically separable and recyclable γ-Fe 2 O 3 /HAp/Ag 3 PO 4 composite microsheets were prepared by hydrothermal and in-situ ion-exchange methods, in which photoactive Ag 3 PO 4 nanoparticles and magnetic γ-Fe 2 O 3 nanoparticles are distributed on the hydroxyapatite (HAp) microsheets. Characterization of the samples was performed by XRD, FE-SEM, EDS, FT-IR, and VSM. The photocatalytic performance of the samples was checked by investigating the degradation process of four different organic dyes under visible-light irradiation. Photocatalytic experiments reveal that all γ-Fe 2 O 3 /HAp/Ag 3 PO 4 samples show certain photocatalytic activities for the degradation of OII, and the degradation rate is different when diverse γ-Fe 2 O 3 /HAp/Ag 3 PO 4 samples are added into the OII solution. FHA-4 exhibits the highest degradation rate, and it could degrade different organic dyes, which means it has the potential to be applied into the treatment of complex wastewater containing different organic dyes. In addition, FHA-4 exhibits ferromagnetic feature, and can be easily separated from water by an external magnetic field.
研究领域:
材料科学
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环境科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
BIOMACROMOLECULES
·
2024
·
IF 5.5
Ping Song,Xingyu Gui,Lina Wu,Xinyu Su,Wenzheng Zhou,Zeyu Luo,Boqing Zhang,Pin Feng,Wei Wei,Chen Fan,Yunhong Wu,Weinan Zeng,Changchun Zhou,Yujiang Fan,Zongke Zhou
Severe bone defects resulting from trauma and diseases remain a persistent clinical challenge. In this study, a hierarchical biomimetic microporous hydrogel composite scaffold was constructed by mimicking the hierarchical structure of bone. Initially, gelatin methacrylamide (GelMA) and methacrylic anhydride silk fibroin (SilMA) were synthesized, and GelMA/SilMA inks with suitable rheological and mechanical properties were prepared. Biomimetic micropores were then generated by using an aqueous two-phase emulsification method. Subsequently, biomimetic microporous GelMA/SilMA was mixed with hydroxyapatite (HAp) to prepare biomimetic microporous GelMA/SilMA/HAp ink. Hierarchical biomimetic microporous GelMA/SilMA/HAp (M-GSH) scaffolds were then fabricated through digital light processing (DLP) 3D printing. Finally, in vitro experiments were conducted to investigate cell adhesion, proliferation, and inward migration as well as osteogenic differentiation and vascular regeneration effects. In vivo experiments indicated that the biomimetic microporous scaffold significantly promoted tissue integration and bone regeneration after 12 weeks of implantation, achieving 42.39% bone volume fraction regeneration. In summary, this hierarchical biomimetic microporous scaffold provides a promising strategy for the repair and treatment of bone defects.
研究领域:
生物医学工程
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组织工程
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再生医学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CLUSTER SCIENCE
·
2019
·Vol. 31
·期 2
·337-346
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IF 2.125
Zhao Chenyu,Jiao Junfeng,Zhou Wencui,Zhang Yong,Liu Han,Yang Xiaogang,Pandi Boomi,Cai Yurong
In this study, a new HAP/rGO/AuNPs-AO modified carbon electrode (GCE) was fabricated for amperometric detection of ascorbic acid. The HAP/rGO/AuNPs composite was prepared by one-step hydrothermal method. The large specific surface area, strong adsorption and excellent biocompatibility of HAP nanowires enabled fast, stable and accurate detection of ascorbic acid. As array of quantum dot, AuNPs had strong electrocatalytic activity in addition to good adsorption to enzymes, which could provide high sensitivity and low limit of detection for biosensor. Then rGO ensured that current signal could be quickly transferred from the composite to electrode. Under the optimum conditions, the prepared biosensor demonstrated a wide linear range from 0.39 to 36 mM (R 2 = 0.99845), a low limit of detection (3.39 μM, S/N = 3) and a high sensitivity (15.949 mA moL −1 ) with good selectivity, stability (10.8%) and repeatability (3.9%), which might providing a reasonable and reliable way for ascorbic acid detection.
研究领域:
生物化学
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材料科学
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分析化学
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产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 18
·10996-11003
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IF 3.361
Mingxing Duan,Qingyan Cheng,Mingming Wang,Yanji Wang
A new noble metal-free Ni–Co–P/HAP (hydroxyapatite) amorphous alloy catalyst was synthesized by an impregnation-chemical reduction method; the structure and properties of the catalysts were characterized by XRD, SEM, BET, XPS and DSC. Based on the model of the hydrodeoxygenation (HDO) of vanillin to 2-methoxy-4-methylphenol (MMP) with formic acid as a hydrogen source, the catalytic performance of the catalyst was studied. The results found that the Ni–Co–P/HAP catalyst exhibited excellent catalytic activity for the in situ HDO reaction of vanillin compared with Ni–P and Ni–Co–P. The conversion of vanillin could be high to 97.86% with MMP selectivity of 93.97% under optimized reaction conditions. In addition, mechanism studies have shown that the side reaction of carbocation and vanillyl alcohol (HMP) condensation can be effectively reduced with increasing the hydrogenation rate, thereby the selectivity of MMP was effectively increased.
研究领域:
催化化学
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能源化学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 21
·16348-16357
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IF 4.6
Conghao Ku,Jiaming Tang,Xucheng Li,Zhengli Liu,Weiran Yang
The synthesis of bis(5-methylfuran)methane (BMFM) from biomass-based 5-methylfurfural (5-MF), a vital fuel precursor, is crucial for biomass refining. However, selective BMFM production from 5-MF needs to suppress side reactions such as hydrogenolysis and decarbonylation. Therefore, direct hydrogenation of 5-MF into BMFM is very challenging in sustainable biomass valorization. In this study, we developed a bimetallic RuCu/hydroxyapatite (HAP) catalyst for selective synthesis of BMFM from 5-MF. The RuCu/HAP catalyst delivered a BMFM yield of 75.6% under mild reaction conditions (Vwater : Vcyclohexane = 1 : 1, 4 MPa H2, 100 °C, 4 h), significantly surpassing its monometallic counterparts (Ru/HAP: 28.7%; Cu/HAP: 0%). Furthermore, a 79% yield of C11 straight-chain alkanes was obtained from BMFM through the hydrodeoxygenation (HDO) process. The systematic characterization revealed that Ru mediates hydrogenation steps via CO activation, while Cu orchestrates acid sites essential for self-condensation of 5-MFA. The synergistic interplay between metallic Ru and acidic Cu sites thereby enables simultaneous optimization of conversion efficiency and BMFM selectivity. These findings provide a practical and efficient route for converting lignocellulosic derivatives into renewable biofuels, particularly for sustainable aviation fuel applications.
研究领域:
催化化学
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可再生资源
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CATALYSIS TODAY
·
2022
·
IF 6.562
Xinyu Guo,Bo Liu,Xinhua Gao,Fugui He,Qingxiang Ma,Subing Fan,Tian-sheng Zhao,Jumei Tian,Prasert Reubroycharoen,Jianli Zhang
The hydrophilic/hydrophobic properties of catalysts greatly influence product distribution by tuning the secondary reactions during Fischer–Tropsch synthesis. Studies have confirmed that hydrophilic modification can inhibit secondary reactions. Herein, hydroxyapatite (HAP)-supported Fe catalysts (Fe/HAP) were prepared using an impregnation method. The effect of the catalyst surface properties on the product distribution in CO hydrogenation was studied. The surface hydroxyl groups on Fe/HAP promoted the growth of carbon chains and improved olefin selectivity. The addition of Na as a promoter to Fe/HAP suppressed the formation of undesirable CH 4 , further improving the selectivity for light olefins and C 5 + hydrocarbons. Compared with Fe 2 O 3 , Fe/HAP showed lower CH 4 selectivity (15%) and higher C 5 + selectivity (45%). Meanwhile, the Fe/HAP -Na catalysts with a higher selectivity of light olefins (with an O/P ratio reaching 4.51).
研究领域:
催化
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Rui Wu,Yulin Wang,Xi Song,Hairan Zhang
Antibiotic residues in food and environment pose a serious threat to human's health and ecological system. Therefore, it is crucial and urgent challenge to fabricate Surface-Enhanced Raman Scattering (SERS) substrate with high sensitivity to detect pesticide residues. A multifunctional three-layer Fe 3 O 4 /HAP/Ag nanoparticle system was fabricated as an active SERS substrate. The active substrate was characterized by comprehensive techniques, including X-ray diffraction (XRD), transmission electron microscopy (TEM), Scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), mapping, and X-ray photoelectron spectroscopy (XPS). The FHA was not only employed to detect ciprofloxacin (CIP) solution by SERS but also it was successfully applied for detection of CIP in fish body. It showed excellent linear relationship in the range of 1.0 × 10 −8 - 1.0 × 10 −3 mol/L for CIP, with low limit of detection (7.5 × 10 −9 mol/L), satisfactory enhancement factor, stability, and repeatability. A novel approach for detecting analyte in animal's body based on SERS was developed. It could be potential candidate to rapid detection of analyte for animal and it will open new perspective in application of SERS in vivo.
研究领域:
环境科学
·
分析化学
·
食品安全
✓ 已验证
产品关联
DOI
高影响因子
Open Life Sciences
·
2024
·Vol. 19
·期 1
·
IF 1.7
Xu Haitao,Li Siyuan,Guo Sutong,Guo Yu,Xu Peirong,Wang Ling,Ding Yujian,Feng Dehong
Because of stress shielding effects, traditional titanium (Ti) alloy scaffolds have a high elastic modulus, which might promote looseness and bone disintegration surrounding the implant, increasing the likelihood of a second surgery. In contrast, 3D-printed porous Ti alloy scaffolds can reduce the scaffold weight while enhancing biocompatibility. Further, these scaffolds’ porous nature allows bone tissue ingrowth as well as strong pore connectivity, which can improve nutrient absorption. Nevertheless, bare Ti alloy implants may fail because of inadequate bone integration; hence, adding a coating on the implant surface is an effective technique for improving implant stability. In this study, a composite coating comprising hydroxyapatite (HAP), chitosan (CS), tannic acid (TA) and copper ions (Cu 2+ ) (Cu 2+ /TA/HAP composite coating) was prepared on the surface of 3D printed porous Ti alloy scaffolds using electrophoretic deposition. Using the standard plate count method, Live/Dead bacteria staining assay, FITC Phalloidin and 4′,6-diamidino-2-phenylindole staining assay, and live/dead staining of cells we determined that the composite coating has better antibacterial properties and cytocompatibility as well as lower cytotoxicity. The Alkaline Phosphatase assay revealed that the coating results showed good osteogenesis potential. Overall, the composite coatings produced in this investigation give new potential for the application of Ti alloys in clinics.
研究领域:
材料科学
·
生物医学工程
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骨科
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生物材料
·
组织工程
✓ 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）