JOURNAL OF POROUS MATERIALS
·
2025
·
IF 3.2
Wang Ke,Shi Xiang,Yuan Hong
The utilization of biomass as a feedstock for aviation kerosene production serves to alleviate demand pressure on petroleum resources. In this work, commercial hydroxyapatite (HAP) was used as a support to fabricate a series of mono- and bimetallic Pt-Ni catalysts via impregnation. These catalysts were then evaluated for the decarboxylation of oleic acid under a non-hydrogen atmosphere. The XRD and TEM analyses revealed that the Pt metal particles were highly dispersed, whereas the Ni particles exhibited a tendency toward aggregation with increasing loading. Furthermore, Pt-Ni bimetallic particles exhibited aggregation with elevated Ni content. Combined NH 3 -TPD and Py-IR characterization indicated that the 1.5Pt2Ni/HAP bimetallic catalyst possessed appropriate acidity(5.18 cm 3 /g STP) and abundant Lewis acid sites, as evidenced by a Brønsted-to-Lewis ratio of 0.32. Catalytic results demonstrated that under CO 2 atmosphere at 340 °C and 18 bar for 6 h, the 1.5Pt2Ni/HAP catalyst achieved complete conversion of oleic acid and the yield of C 8 -C 17 alkanes reached as high as 85.0%.
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JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Jianzhe Ma,Mingzhu Xia,Sidi Zhu,Fengyun Wang
In this paper, a new nanobiomaterial, alendronate hydroxyapatite (AL-HAP), was synthesized by the conventional co-precipitation method with alendronate (AL) as dopant, and applied in the removal of heavy metal contaminants for the first time. The characterization results showed that the crystallinity of the AL-HAP nanocomposite biomaterials after doping has been greatly deteriorated, and the pore volume and pore size increased. When the doping amount of AL was 10 %, the maximum adsorption capacity of AL-HAP for Pb 2+ , Cd 2+ and Cu 2+ can reach 1431.8, 469 and 226.6 mg/g, respectively, which was much higher than that reported in other literature. Meanwhile, the adsorption mechanism of AL-HAP for heavy metal ions was discussed from both the views of experimental and Multiwfn program theoretical calculation based on density functional theory (DFT). Quantitative molecular surface analysis was carried out for the first time to study the minimum points and the positions of electrostatic potential (ESP) and average local ionization energy(ALIE), as well as the exact values, giving more accurate and reliable analysis conclusions for the reaction sites and binding mode. In addition, the independent gradient model (IGM) method was also firstly applied to investigate the interactions between AL and HAP or AL-HAP nanocomposite with metal ions. AL-HAP is a potential adsorption material for heavy metal wastewater treatment and soil remediation because of its advantages such as convenient synthesis, excellent adsorption performance and no secondary pollution.
研究领域:
材料科学
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环境科学
·
生物医学
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RSC Advances
·
2014
·Vol. 4
·期 32
·16731-16738
·
IF 3.708
Yuanyuan Zhou,Pengwei Qi,Zhihua Zhao,Qian Liu,Zhongjun Li
Fibrous composites of hydroxyapatite (HAP)/polyvinylpyrrolidone (PVP)/polyethylene oxide (PEO) with good mechanical properties were successfully prepared by a sol-electrospinning process. As HAP nanoparticles could not disperse well in polymer aqueous solution, a modified procedure was presented to firstly prepare HAP sol. The PVP and PEO polymers were then directly dissolved in the HAP sol solution for electrospinning, which was based on completely miscible solutions. The morphology and structure of the electrospun fibrous composites were investigated by XRD, SEM, TEM and FTIR. It was of interest to observe that large numbers of HAP nanoneedles were preferentially oriented parallel to the longitudinal direction of the electrospun PVP–PEO nanofibers when a relatively small amount of HAP was used. When there was a large amount of HAP, the agglomeration of needle-like HAP particles could stretch out of the fibers. This could reduce the electrical charge carried by the liquid jet, and make some agglomerated HAP particles randomly arrange on the edge of the jet, with the result that some protuberances existed on the surface of the fibers. Mechanical testing demonstrated that the incorporation of HAP into the PVP–PEO matrix led to significantly better tensile properties compared to those of the pure electrospun polymer membrane, and the incorporation of 60 wt% HAP into the matrix of PEO–PVP nanofibers led to a higher tensile strength of 19.20 ± 0.09 MPa and a percentage of elongation of 11.64 ± 0.31%, respectively. Based on the study, the combination of PVP–PEO and HAP could be promising for application as scaffolds for bone tissue engineering.
研究领域:
生物材料
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组织工程
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ChemCatChem
·
2015
·Vol. 7
·期 16
·2485-2492
·
IF 4.556
Guangyue Xu,Jianhua Guo,Ying Zhang,Yao Fu,Jinzhu Chen,Longlong Ma,Qingxiang Guo
Graphical Phosphate aids palladium: A highly reactive, selective, compatible, stable and low-cost catalytic system for selective hydrogenation of phenol to cyclohexanone is described, which consists of well-dispersed Pd nanoparticles anchored to the hydroxylapatite surface that supports the specificity through its basic sites. The production of pure cyclohexanone under mild conditions over catalysts with high reactivity, selectivity, compatibility, stability, and low cost is still a great challenge. Here we report a hydroxyapatite-bound palladium catalyst (Pd–HAP) to demonstrate its excellent performance on phenol hydrogenation to cyclohexanone. Based on catalyst characterization, the Pd nanoclusters (≈0.9 nm) are highly dispersed and bound to phosphate in HAP. Only basic active sites on HAP surface are detected. At 25 °C and ambient H 2 pressure in water, phenol can be 100 % converted into cyclohexanone with 100 % selectivity. This system shows a universal applicability to temperature, pH, solvent, low H 2 purity, and pressure. The catalyst reveals high stability to be recycled without deactivation or morphology change; and Pd nano-clusters barely aggregate even at 400 °C. During the reaction, HAP adsorbs phenol, and Pd nanoclusters activate and spillover H 2 . The mechanism is also investigated, proposed, and verified.
研究领域:
催化化学
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材料科学
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绿色化学
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NORDIC PULP & PAPER RESEARCH JOURNAL
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2021
·Vol. 36
·期 3
·435-442
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IF 1.04
Yuanyuan Bai,Hao Wang,Tsolmon Borjigin,Han Zheng,Yang Yang,Jiao Xie,Meng Wang,Jianbo Zhan,Ying Wan,Wen Liu
The ash condensation ability of the cigarette paper is an important factor affecting the cigarette grades. In this study, we put forward an effective method of improving this ability. Xanthan gum was successfully synthesized, applied as an ash integrator in the dip-coating process of cigarette paper production, and showed good performance. Cationic guar gum, cellulose phosphate and Hydroxyapatite (HAP) have been added in the pulp and showed better performance of the ash condensation property. The ash become much whiter and the scatter of the ash have been suppressed. Moreover, the further addition of HAP would result in a worse combustion efficiency, leading to the burning out of the cigarette in early time.
研究领域:
材料科学
·
烟草研究
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2017
·Vol. 24
·期 6
·5791-5799
·
IF 2.741
Dai Hongliang,Lu Xiwu,Peng Yonghong,Yang Zixuan,Zhsssu Huaqing
The HAP crystallization for phosphorus removal from wastewater contributes to an environmental friendly production due to the fact that it helps reduce or eliminate the water eutrophication as well as increases the recovery of mineral resources. However, the generated microcrystalline with poor settleability in high levels of supersaturation solution has a negative effect on the phosphorus recovery efficiency. To overcome the drawback, multiple reagent feed ports (four feed ports) and different recirculation ratio (1.0, 1.5, 2.0, 2.5, 3.0) were investigated to control the levels of supersaturation in an air-agitated reactor with calcite as seeds. Results showed that the approach of multiple reagent feed ports could improve the conversion ratio of orthophosphate, but it had a limited effect (∼3% improvement) on phosphorus recovery efficiency (deposition on the seeds). With the increase of the recirculation ratio, the recovery efficiency was increased gradually and reached an optimal value of 85.63% under the recirculation ratio of 2.5 and four feed ports. This is because the adopted strategies could reduce the level of supersaturation by diluting the concentration of the reagents and inhibit large numbers of microcrystalline coinstantaneous occurrence. Meanwhile, the crystallized products were detected and analyzed by scanning electron micrograph (SEM) with energy-dispersive spectrometry (EDS) and X-ray diffraction (XRD), which were proved to be HAP with a high purity. Collectively, these results demonstrated that supersaturation control using conventional approaches had a limited improvement on the phosphorus recovery efficiency in the form of HAP, and the new control strategies for supersaturation dispersion should be developed in the further study.
研究领域:
环境工程
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化学工程
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资源回收
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水处理技术
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结晶过程
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Bioengineering-Basel
·
2026
·Vol. 13
·期 2
·139
·
IF 3.7
Juhan Li,Nan Xiang,Lingbin Che,Jianfeng Wu,Dianwen Song
Despite extensive exploration of gelatin methacryloyl (GelMA)-based hydrogels for bone tissue engineering, their clinical translation is hindered by a critical trade-off: poor precursor stability leads to rapid sedimentation of bioactive fillers like hydroxyapatite (HAp), while formulations optimized for injectability often sacrifice mechanical integrity or handling precision. To overcome this challenge, we report a rheologically engineered, injectable composite hydrogel scaffold that integrates unmodified gelatin as a thermoresponsive viscosity modulator into a GelMA/HAp matrix. The incorporation of gelatin yields a stable, paste-like precursor at physiological temperature, which effectively prevents HAp sedimentation and enables precise, filamentous extrusion. Subsequent UV crosslinking locks the homogeneous structure in place, resulting in a mechanically robust scaffold with significantly enhanced compressive modulus. In vitro studies demonstrate that this biomimetic microenvironment not only supports high viability and proliferation of bone marrow stromal cells (BMSCs) but also potently enhances their osteogenic differentiation, as evidenced by upregulated alkaline phosphatase activity, Runx2 expression, and matrix mineralization. This simple, one-step strategy successfully reconciles injectability, structural fidelity, and bioactivity, offering a highly promising and clinically translatable platform for minimally invasive bone regeneration.
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ACS Biomaterials Science & Engineering
·
2026
·
IF 6
Siluo Dai,Jiaxin Hu,Yiran Li,Tingting Ma,Aolong Li,Zhengyang Qin,Yubao Li,Jidong Li
Three-dimensional printed porous scaffolds provide the necessary mechanical support for bone repair. However, their inherent structural design often leads to insufficient cell attachment sites within the large pores, resulting in a low-density and uneven spatial distribution of initially adhered cells, which ultimately hampers bone regeneration. To address this limitation, we developed a gradient-functionalized scaffold by incorporating an α-ketoglutarate (AKG)-loaded gelatin (Gel/AKG) network into the macropores of a 3D-printed polyamide 66/hydroxyapatite (PH) composite scaffold. This design aims to facilitate initial cell adhesion and subsequent osteogenic differentiation. Material optimization confirmed that a formulation of 5 wt % gelatin carrying 0.25 wt % AKG achieved optimal perfusion and structural stability within the scaffold. This construct establishes an integrated microporous network that significantly enhances surface properties, actively guiding and promoting dense early cell colonization. The degradation of gelatin timely creates space for bone ingrowth, while the sustained release of AKG continuously enhances cell osteogenic activity. In vivo animal studies further revealed an 110% increase in new bone volume in the experimental group compared to the control after 8 weeks implantation. In conclusion, this strategy successfully integrates robust mechanical support, guided cell adhesion, and bioactive regulation into a spatiotemporally coordinated system, offering a promising solution for bone defect repair by harmonizing structural compatibility with functional regeneration.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Liushen Lu,Yan Zhang,Zhenbo Yuan,Jinyu Xu,Min Li,Yawen Wu,Lijun Wang,Shuping Huang,Yijian Rao
Photocatalysis is an effective and environmentally-friendly technique for antibiotics degradation in wastewater. Herein, a novel rationally designed HexaAcetyl-Reductive Cercosporin/Hydroxyapatite (HARCP/HAp) composite was simply fabricated through a convenient bench-top fabrication method for the efficient, fast and complete removal of tetracycline (TC) within 10 min upon 32 W compact fluorescent lamp (CFL) irradiation. The photoactivity of the fabricated HARCP/HAp-2 (0.5719 min −1 ) to remove TC showed dramatic enhancement compared with HARCP (0.0098 min −1 ) or HAp (0.0374 min −1 ). More importantly, a broad range concentration (30–70 mg L −1 ) of 50 mL TC solutions, even a scalable 5 L solution at the real situation of 158 μg L −1 under natural sunlight, could be photoremoved efficiently by this new photocatalytic system. Meanwhile, it exhibited excellent stability and reusability for repeated usage. The photoremoval process mechanically involved superoxide radical anion (•O 2 − ), hydroxyl radical (•OH) and hole (h + ). Therefore, we provided a novel fabrication of the organic-containing photocatalyst composite involving the natural product-derived HARCP for the efficient removal of TC, avoiding the expensive and polluting heavy metals, harsh conditions to fabricate and high-power light sources.
研究领域:
环境科学
·
材料科学
·
生物学
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Tianhong Xu,Rongjiang Zou,Xiaofang Lei,Xuemei Qi,Qiang Wu,Weifeng Yao,Qunjie Xu
Photocatalysis is a well-established and green technique for degradation of antibiotics in wastewater. Hydroxyapatite (HAp) has excellent biocompatibility, biological activity, non-toxicity and low cost, and has many applications in biomaterials. Recently, HAp has been reported as an inexpensive green photocatalyst for cleaning some drug contaminations. However, its photocatalytic performance and chemical stability are far from practical applications. In this research, a series of porous hollow hydroxyapatite (HAp) microspheres decorated with small amounts of ultrathin graphitic carbon nitride (g-C 3 N 4 ) were firstly and successfully fabricated by a facile hydrothermal procedure. The experimental results show that as-prepared g-C 3 N 4 /HAp photocatalysts exhibited evidently enhancement on the photocatalytic activities for the degradation of tetracycline (TC), compared with the corresponding ultrathin g-C 3 N 4 and porous hollow HAp microspheres. Notably, g-C 3 N 4 (1.5 wt.%)/HAp composite displayed a net high photocatalytic activity for TC degradation (almost 100% within 15 min). Moreover, the as-prepared g-C 3 N 4 (1.5 wt.%)/HAp exhibited a good stability in the cyclic runs for the photocatalytic degradation of TC, demonstrating its promising potential as an efficient photocatalyst. An optimum decorating amount of ultrathin g-C 3 N 4 onto porous hollow HAp microspheres favors an effective separation of photogenerated electron-hole pairs, which can be responsible for the enhanced photocatalytic performance. In addition, the photocatalytic degradation mechanism for TC was proposed. This fundamental research will provide a promising strategy for the development of highly efficient and compatible photocatalysts with many applications.
研究领域:
环境科学
·
材料科学
·
化学工程
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CHEMOSPHERE
·
2022
·
IF 8.943
Yan Zhang,Lijun Wang,Liushen Lu,Meiling Liu,Zhenbo Yuan,Lifeng Yang,Changmei Liu,Shuping Huang,Yijian Rao
To address the water pollution induced by pharmaceuticals, especially antibiotics, and pathogens , natural product emodin, a traditional Chinese medicine with the characteristic large π-conjugation anthraquinone structure, was used to rationally develop a novel Emodin/HAp photocatalyst by integrating with a thermally stable and recyclable support material hydroxyapatite (HAp) through a simple preparation method. It was found that its photocatalytic activity to generate reactive oxygen species (ROS) was greatly improved due to the migration of photogenerated electrons and holes between emodin and HAp upon visible light irradiation. Thus, this Emodin/HAp photocatalyst not only quickly photodegraded tetracycline with 99.0% removal efficiency but also exhibited complete photodisinfection of pathogenic bacteria Staphylococcus aureus upon visible light irradiation. Therefore, this study offers a new route for the design and preparation of multifunctional photocatalysts using widely available natural products for environmental remediation.
研究领域:
环境科学
·
材料科学
·
微生物学
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PubMed
高影响因子
Polymers
·
2023
·Vol. 15
·期 20
·4144
·
IF 5
Yisu Wang,Yan Wang,Shuai Qiu,Chongyang Wang,Hong Zhang,Jing Guo,Shengfa Wang,Huixia Ma
Chitosan/Hydroxyapatite composites, enriched with relatively active -NH2and -OH groups, have emerged as promising adsorbents for heavy metal removal. In this study, we harnessed the potential of CS/HAP composites by developing monolithic PLA@CS/HAP filters utilizing 3D printing and freeze-drying techniques. These filters possess both macroscopic and microscopic porous structures, endowing them with exceptional capabilities for removing heavy metals from water. The adsorption properties of CS/HAP composites were explored by varying the dosage, duration, and initial concentrations of copper ions. The maximum adsorption capacity for Cu2+was determined to be approximately 119+/−1 mg/g at the natural pH and 298 K. Notably, the monolithic PLA@CS/HAP filters demonstrated remarkable efficiency in the removal of copper ions, with 90% of copper ions effectively removed within a mere 2-h period in a cyclic adsorption experiment. Furthermore, the PLA@CS/HAP filters exhibited a robust dynamic Cu2+removal capacity (80.8% or even better in less than 35 min) in a dynamic adsorption experiment. Importantly, all materials employed in this study were environmentally friendly. In summary, the PLA@CS/HAP filter offers advantages such as ease of preparation, eco-friendliness, versatility, and broad applicability in diverse wastewater treatment scenarios, thereby presenting a significant potential for practical implementation.Keywords:chitosan;hydroxyapatite;3D printing;adsorption
研究领域:
环境科学
·
材料科学
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高影响因子
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