JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2016
·Vol. 16
·期 4
·3628-3631
·
IF 1.338
Yu Shiyong,Gao Xuechuan,Zhang Renfei,Li Zhao,Tan Zhibing,Su Haiquan
This paper described the controlled synthesis and release properties of a new kind of multifunctional drug-release system which was prepared by encapsulation of zirconium bis-(monohydrogen orthophosphate) monohydrate (α-ZrP) with chitosan (CHI). As obtained the α-ZrP@CHI
nanocomposites were found to possess the structural features of both α-ZrP and CHI. The release properties of the α-ZrP@CHI nanocomposites were evaluated using Gentamicin sulfate as the model drug. And α-ZrP@CHI composites showed a prolonged drug release
time compared with α-ZrP, which can be attributed to the unique lamellar structure and the encapsulation with CHI. The controlled synthesis of α-ZrP@CHI nanocomposite thus provided a new opportunity for future development of delivery vehicles.
研究领域:
材料科学
·
药学
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 25
·e52384
·
IF 3.057
Bing Yin,Erfa Zhao,Xujiang Hua,Huafeng Xu,Fangyu Fan,Dongmei Qi,Xianle Hua,Jinming Zhen,Dongshuai Hou
The development of high-performance coatings for concrete structures is essential to ensure their durability and service life. However, most of the proposed developed strategies suffer from various limitations, especially regarding the wear and biological-corrosion resistances of the coatings. This work reports a facile and efficient method to prepare effective composite coatings by nano-modification, in which the intercalated composites play structural and functional roles in the corrosion, wear, and biological-corrosion resistances. An in situ assembly synthesis was used to prepare the intercalated composites. The composites exhibited an innovative alternating skateboard structure and a functional composition. The silane-emulsion modified with the composites was prepared and coated on the mortar surface to systematically study its performance at the concrete interface. The results indicate the good dispersion stability of the innovative α-ZrP composites in the silane emulsion and their significant enhancement of the silane coatings' ability to improve the durability of marine concrete. The mechanisms of performance improved by the prepared composites through their unique lamellar structure and interlamellar silver-nanoparticle composition were also examined. The prepared composite coating exhibits a new strategic approach to solve problems associated with concrete applications and provides technical guidance for surface protection of marine concrete structures.
研究领域:
建筑材料
·
材料科学
·
海洋工程
✓ 已验证
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2023
·
IF 5.4
Liping Yan,Siming Yan,Yi He,Yi Fan,Xinyu Cheng,Huilian Zhou,Jiamin Zhong,Zhiyuan Li,Jinxue Song,Hongjie Li
In this study, propylamine and ethylenediamine intercalated α-ZrP nanocomposites (denoted by P-α-ZrP and E-α-ZrP, respectively) were synthesized. The effects of propylamine and ethylenediamine intercalated α-ZrP nanocomposites and their reinforcements on the corrosion resistance and mechanical properties of Ni-B coatings were investigated and compared. The morphology and structure of the three composites were characterized using transmission electron microscopy, atomic force microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, infrared spectroscopy, thermogravimetric analysis, and particle size analysis. Both propylamine and ethylenediamine intercalation increase the layer spacing of α-ZrP, but do not change the lamellar structure of α-ZrP. The EIS test results show that both Ni-B/P-α-ZrP and Ni-B/E-α-ZrP composite coatings have significantly lower corrosion rates than Ni-B and Ni-B/α-ZrP composite coatings. Compared to Ni-B/α-ZrP, the corrosion rates are reduced by 32 % and 76 % respectively. The R ct values for Ni-B/P-α-ZrP and Ni-B/E-α-ZrP composite coatings are also distinctly higher than Ni-B/α-ZrP, with Ni-B/E-α-ZrP having the highest values. In addition, Ni-B/P-α-ZrP and Ni-B/E-α-ZrP composite coatings are both harder than Ni-B/α-ZrP and have lower average coefficients of friction and wear rates than Ni-B/α-aZrP. Among them, the Ni-B/E-α-ZrP composite coating has the highest microhardness (1163.64 ± 21.20 HV) and the best wear resistance. The wear rate is reduced by 87 % and 65 % compared to Ni-B and Ni-B/α-ZrP composite coatings respectively. In conclusion, both P-α-ZrP and E-α-ZrP are better than α-ZrP in terms of enhancement, with E-α-ZrP being the best.
研究领域:
材料科学
·
电化学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHARACTERIZATION
·
2022
·
IF 4.537
Yahui He,Shihong Zhang,Yi He,Hongjie Li,Teng He,Ruxia Song,Bo Liu,Zhifei Zhang,Yi Fan
Ni-P/α-ZrP composite coatings were successfully prepared by electroless plating, in which α-ZrP nanosheets were synthesized by reflow method. The surface morphology, element composition, structure and valence composition of the composite coating were analyzed by SEM, EDS, XRD and XPS, respectively. In the reciprocating friction experiment and electrochemical test, the corrosion and wear behaviour of the composite coatings were analyzed. The results show that α-ZrP nanosheets can significantly improve the corrosion and wear resistance of Ni P alloys. With the enrichment of α-ZrP nanosheets, the properties of coatings showed a tendency of increasing first and then slightly decreasing. Ni-P/α-ZrP (1.00 g/L) coating has the lowest porosity and the best corrosion resistance, and its corrosion rate (6.01 × 10 −3 mm/a) is about 1/5 of that of pure Ni P coating (3.12 × 10 −2 mm/a). Ni-P/α-ZrP (1.50 g/L) coating has the best wear performance, its average coefficient of friction (COF) is reduced from 0.568 to 0.167, and the specific wear rate is reduced from 7.13 ± 0.42 (× 10 −6 ) to 0.36 ± 0.06 (× 10 −6 ) (about 1/20 of pure Ni P coating).
研究领域:
材料科学
·
表面工程
·
电化学
✓ 已验证
DOI
高影响因子
Chemistry-An Asian Journal
·
2025
·
IF 3.3
Guangyao Li,Xinghua Zhang,Qi Zhang,Lungang Chen,Jianguo Liu,Longlong Ma
The hydrodeoxygenation (HDO) of lignocellulose-based furan compounds holds significant potential for the synthesis of aviation fuel. However, challenges such as high catalyst costs and low yields persist. This study proposes a two-step strategy, involving pre-hydrogenation followed by HDO, to convert the C 15 condensation product derived from furfural and levulinic acid into hydrocarbons within the aviation fuel range. A Ni-based catalyst supported on zirconium phosphate (ZrP) with the incorporation of Nb 2 O 5 was synthesized. At 340 °C, 4 MPa H 2 , and weight hourly space velocity (WHSV) = 14.9, using Ni-Nb 2 O 5 /ZrP as the catalyst for HDO, considering the pre-hydrogenation, the overall yield of alkanes in the C 10 –C 15 jet fuel range from solid condensation products FLF is 62.4%, with a yield of C 15 alkanes of 16.2% and C 14 alkanes of 25.2%. A series of characterizations and comparative experiments were carried out. Experimental studies have demonstrated that doping with Nb 2 O 5 plays a crucial role in enhancing the HDO performance. The characterization results indicate that the introduction of an appropriate amount of Nb 2 O 5 increased the electron density of ZrP, enriched the catalyst's acidic sites, in addition, the ratio of Bronsted acid to Lewis acid sites in the catalyst increases. Finally, a brief analysis of industrialization potential was conducted.
研究领域:
化学工程
·
可再生能源
·
催化科学
✓ 已验证
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Lei Ye,Yiwen Han,Hui Bai,Xuebin Lu
Bifunctional heterogeneous catalysts (HZ-ZrP) were prepared by using HZSM-5 as the carrier to support a zirconium phosphate (ZrP) active component for the one-pot value-added conversion of biomass-derived furfural (FAL). By changing the loading amount of ZrP, the ratio of Lewis to Brønsted acid (2.7–15.4) and the acid strength of the catalysts can be adjusted. HZ-ZrP-5 and HZ-ZrP-16 were selected for the production of different value-added chemicals, and a total yield of up to 93.8% (i-PL and GVL) and 64.2% (GVL) were obtained using isopropanol as the hydrogen donor under optimized conditions, respectively. Furthermore, stability and recyclability of the catalyst were also tested and showed no significant drop in total yield after recalcination. The catalysts have high activity (Ea = 27.05 ± 3.08 kJ mol–1), but the ring-opening reaction restricted the cascade reaction. In addition, a possible reaction pathway and mechanism for the FAL conversion were proposed.
研究领域:
催化化学
·
生物质能
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2019
·Vol. 31
·期 3
·602-615
·
IF 2.162
Jiaxin Li,Xuejun Lai,Hongqiang Li,Xingrong Zeng,Yuncong Liu,Yunsheng Zeng,Changcheng Jiang
The combination of catalyzing carbonization and free-radical quenching mechanism is proposed to be a promising strategy for the preparation of high-efficiency flame-retardant polypropylene (PP). Herein, a novel functionalized zirconium phosphate (RQZrP) nanosheet with free-radical quenching capability was fabricated by decorating macromolecular N-alkoxy hindered amine (MNOR) onto the surface of ZrP. It was combined with an intumescent flame retardant (IFR) to flame-retard PP. The results showed that there was a good synergism between RQZrP and IFR, which effectively improved the fire safety of PP. When the content of RQZrP was 2 wt% and IFR was 23 wt%, the limiting oxygen index (LOI) of PP increased from 19.0% to 33.0%, and it achieved a UL-94 V-0 rating. Meanwhile, the peak heat release rate (PHRR), total heat release (THR), carbon monoxide production (COP), and carbon dioxide production (CO 2 P) were significantly decreased. It revealed that nitroxyl radicals generated by RQZrP could capture alkyl radicals and peroxy radicals that produced during the degradation and combustion of PP. Meanwhile, RQZrP acted as a solid acid that catalyzed PP chains rapidly cross-linking to form char on its surface, and it also played as a supporting skeleton to enhance the strength and compactness of the char layer, thus effectively preventing the transmission of heat, oxygen, and combustible gases.
研究领域:
材料科学
·
高分子化学
·
燃烧与防火研究
✓ 已验证
DOI
高影响因子
Sustainable Energy & Fuels
·
2020
·Vol. 4
·期 8
·4293-4300
·
IF 5.503
Panpan Zhang,Lihua Kang,Mingyuan Zhu,Bin Dai
In this study, the ZrP/MCM-41 catalyst was successfully synthesized by using a facile one-pot method to load zirconium phosphate (ZrP) on MCM-41. The synthesized ZrP/MCM-41 catalyst was characterized by various characterization methods. The catalyst was confirmed to have medium and strong acidic sites by ammonia temperature programmed desorption (NH3-TPD). The Zr in ZrP/MCM-41 was confirmed to be Zr4+ using X-ray photoelectron spectroscopy (XPS). The catalytic activity was evaluated during the oxidative desulfurization (ODS) process, and the optimal reaction conditions were determined, including reaction temperature and time, the catalyst dosage and O/S (H2O2/sulfur) molar ratio. Under optimal reaction conditions, the sulfur removal rate of the ODS process reached 99.9%. After the catalyst was recycled 14 times, the catalytic activity was still 94.68%. The catalyst has good catalytic activity and reusability.
研究领域:
化学工程
·
催化
·
环境化学
✓ 已验证
产品关联
DOI
高影响因子
CORROSION SCIENCE
·
2024
·
IF 7.4
Yiqian Lv,Jingmao Zhao,Baomin Fan,Hassan Murtaza,Jingbao Wang,Weixiao Jing,Liuwei Chao
Synergistical passive barrier enhancement and active self-healing has been an emerging tactic for developing prominent anti-corrosion coatings. Herein, a cerium/2-methylimidazole metal-organic framework (Ce-MOF) was that is in-situ grown on ultrathin α-ZrP nanosheets with outstanding dispersibility. The parallel arrangement of α-ZrP-based nanosheets within the epoxy matrix was driven by shear force from blade-coating technology optimizing the coating's physical barrier and self-repairing capability. This advancement may herald a new era in designing smart coatings and offering potent protection against diverse corrosion types such as filiform corrosion.
研究领域:
材料科学
·
腐蚀工程
·
纳米技术
·
涂层技术
✓ 已验证
产品关联
DOI
高影响因子
TRIBOLOGY LETTERS
·
2016
·Vol. 64
·期 1
·1-9
·
IF 1.758
Chen Li,Zhang Xiaosheng,Xu Hong,Dong Jinxiang
The tribological properties of α-Zr(HPO 4 )·H 2 O and Cu(OH) 2 Zr(HPO 4 ) 2 ·2H 2 O (α-ZrP and Cu-α-ZrP, respectively) were investigated in lithium grease by using an optimol SRV-V oscillating reciprocating friction and wear tester (SRV). α-ZrP had excellent anti-wear and friction-reducing properties regardless of the applied load, frequency, and test duration. The applied load for α-ZrP reached 600 N, and the corresponding friction coefficient was 0.082. At 60 Hz, the wear volume rate was 11.16 × 10 −9 mm 3 /Nm. The tribological properties of Cu-α-ZrP were dependent on the test conditions, especially at higher frequency. The α-ZrP worn steel surfaces were smooth and shallow as indicated from scanning electron microscopy and a three-dimensional non-contact surface mapping profiler. Related elements were detected by energy-dispersive X-ray spectroscopy on the rubbed surfaces. A boundary solid film may form on the worn surfaces after friction tests. In reciprocating mode, α-ZrP stuck on the contacting surfaces, which enabled it to form a stable solid lubricant film more effectively than Cu-α-ZrP. The crystal structure may be important for film strength under high loads, especially at high speed.
研究领域:
材料科学
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2020
·
IF 7.246
Lu Tian,Luxin Zhang,Yuting Liu,Yunfei He,Yujie Zhu,Ruijun Sun,Simin Yi,Junping Xiang
A clean and highly efficient catalytic system for the synthesis of ethyl levulinate (EL) from kitchen waste was developed. A heterogeneous catalyst (Sn/ZrP–SO 3 H) was prepared and the Brønsted and Lewis acid sites on the surface of the catalyst were evaluated by pyridine FT-IR. Other physicochemical properties were also characterized using XRD, SEM, FT-IR, XPS , BET, NH 3 -TPD. The yield of EL obtained was 49.27%, when glucose was used as the starting material and subjected to 170 °C for 10 h in the presence of the solid acid catalyst , Sn/ZrP–SO 3 H. The prepared catalyst was also combined with several metal triflates; (Al(OTf) 3 , Fe(OTf) 3 , Sm(OTf) 3 ) to form a catalytic system for the efficient preparation of EL from kitchen waste. Sn/ZrP–SO 3 H/Al(OTf) 3 had superior activity compare to other catalyst combinations. In single factor experiments, the yield of EL reached 52.52% after heating at 170 °C for 4 h. In addition, four-factor and three-level experiments were performed using response surface methodology (RSM) to analyze the interaction between each factor. The optimal reaction conditions predicted by the model (163 °C, 7.63 h, 20 mg Al(OTf) 3 , 40 mg Sn/ZrP–SO 3 H and 79.98 mg of kitchen waste) estimated a maximal yield for EL of 51.24%. The experimental yield of EL however was 52.03% which confirms the reliability of the model. This work provides a cleaner production technology for the synthesis of the high value-added chemical EL, and a sustainable route for the utilization of kitchen waste.
研究领域:
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2015
·Vol. 15
·期 4
·3271-3275
·
IF 1.556
Liu Zhuowei,Chen Ying,Mo Songping,Cheng Zhengdong,Li Huawei
The stability of nanofluid is an important property that needs to be researched. In our study, a novel method using Zirconium phosphate (ZrP) discotic colloid to disperse nanoparticles was proposed for improving stability. TiO2 nanofluid was prepared by dispersing TiO2
nanoparticles into exfoliated α-ZrP suspensions at different concentrations. Scanning electron microscopy and X-ray diffraction were used to characterize the shape, average size, and components of primary ZrP nanoplatelets. The absorbance of the suspensions was measured by a UV-VIS
spectrophotometer. The results show that the stability first increased, and then decreased with increasing ZrP concentration at 1 wt.% TiO2. The effect was optimal at 2 wt.% ZrP. Thus, the hindrance of nanoplatelets in the aggregation and sedimentation of nanoparticles is the main
reason for improving the stability of nanofluids.
研究领域:
纳米材料科学
·
胶体化学
·
流体稳定性
·
材料表征技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）