Pub Date : 2019-08-27DOI: 10.1504/ijnm.2019.10023463
H. Liu, Shuang Gao, H. Wang, G. Yang, Yu Zhang
In order to accurately calculate eddy current loss of the rod-shaped giant magnetostrictive material, improve the giant magnetostrictive actuator control accuracy of displacement, an eddy current loss model of rod GMM that considering the skin effect was established. Firstly, the traditional eddy current loss of rod-shaped GMM was deduced, then discussed the influence of the skin effect for the inside magnetic field distribution of GMM rod, finally analysed the temperature characteristics of GMA through the comsolmultiphysics finite element numerical analysis method. Compared with traditional eddy current loss, under low frequency the two methods has same result, but under high frequency the new model can be more accurately calculate the eddy current loss of rod-shaped GMM. The research result has a great significance for improving the control precision and advancing the study of eddy current loss of GMA.
{"title":"Study on eddy current loss characteristics of precision giant magnetostrictive actuator considering magnetic field distribution","authors":"H. Liu, Shuang Gao, H. Wang, G. Yang, Yu Zhang","doi":"10.1504/ijnm.2019.10023463","DOIUrl":"https://doi.org/10.1504/ijnm.2019.10023463","url":null,"abstract":"In order to accurately calculate eddy current loss of the rod-shaped giant magnetostrictive material, improve the giant magnetostrictive actuator control accuracy of displacement, an eddy current loss model of rod GMM that considering the skin effect was established. Firstly, the traditional eddy current loss of rod-shaped GMM was deduced, then discussed the influence of the skin effect for the inside magnetic field distribution of GMM rod, finally analysed the temperature characteristics of GMA through the comsolmultiphysics finite element numerical analysis method. Compared with traditional eddy current loss, under low frequency the two methods has same result, but under high frequency the new model can be more accurately calculate the eddy current loss of rod-shaped GMM. The research result has a great significance for improving the control precision and advancing the study of eddy current loss of GMA.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42024353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-03-29DOI: 10.1504/IJNM.2019.10020304
F. Elsner-Dörge, O. Riemer, Melanie Willert, A. Meier
Micro-milling, besides selective laser melting, is commonly used for the manufacture of dental prostheses. Demands to the application of these prostheses require hard and tough materials like cobalt-chrome alloys or ceramics. The cutting process is governed by static as well as dynamic interactions between the process and the structure of the workpiece. These interactions deteriorate the work result, especially the shape accuracy. The deflection of the milling tool is one effect, which has a significant influence. However, the deflection can be minimised by optimising the manufacturing strategy, by an adjustment of the process parameters or by optimising the tool path, which leads to an increased quality of the final product. The work presented in this paper aims to establish a connection between tool deflection and resulting form deviations during micro-milling of defined geometries in CoCr alloys. This is achieved by measuring the active forces while machining an defined test geometry with different feed rates and radial infeeds and a subsequent evaluation of the resulting form. Furthermore, the influence of the workpiece geometry on the forces and form deviations is analysed to serve as a foundation for future optimisation steps. In order to quantify the surface quality, white light interferometry is applied to measure the surface roughness Sa and Sq and the influence of feed rate vf and radial infeed ae on the surface roughness is derived.
{"title":"Forces, form deviations and surface roughness in micro-milling of CoCr alloys for dental prostheses","authors":"F. Elsner-Dörge, O. Riemer, Melanie Willert, A. Meier","doi":"10.1504/IJNM.2019.10020304","DOIUrl":"https://doi.org/10.1504/IJNM.2019.10020304","url":null,"abstract":"Micro-milling, besides selective laser melting, is commonly used for the manufacture of dental prostheses. Demands to the application of these prostheses require hard and tough materials like cobalt-chrome alloys or ceramics. The cutting process is governed by static as well as dynamic interactions between the process and the structure of the workpiece. These interactions deteriorate the work result, especially the shape accuracy. The deflection of the milling tool is one effect, which has a significant influence. However, the deflection can be minimised by optimising the manufacturing strategy, by an adjustment of the process parameters or by optimising the tool path, which leads to an increased quality of the final product. The work presented in this paper aims to establish a connection between tool deflection and resulting form deviations during micro-milling of defined geometries in CoCr alloys. This is achieved by measuring the active forces while machining an defined test geometry with different feed rates and radial infeeds and a subsequent evaluation of the resulting form. Furthermore, the influence of the workpiece geometry on the forces and form deviations is analysed to serve as a foundation for future optimisation steps. In order to quantify the surface quality, white light interferometry is applied to measure the surface roughness Sa and Sq and the influence of feed rate vf and radial infeed ae on the surface roughness is derived.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48005173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-03-29DOI: 10.1504/IJNM.2019.10020302
Loai Aljerf, Rim Nadra
This study comes as the first trial that uses microwave (MW) in combination with assisted chemical vapour deposition (CVD) to generate homogeneous carbon nanofibers (CNFs) at short period thermal reaction. The outcomes confirmed that these materials are of highly-ordered pyrolitic graphite nature. CNFs were obtained having uniform diameters (80-150 nm) and long fibres (0.82-1.75 μm). SEM and TEM evaluations revealed relatively less damage in fractured surfaces and the TGA exhibited insignificant change of CNFs during thermal decomposition. The 'solid' CNFs showed clear properties as disorder, crystalline, and bent graphitic sheets. The as-prepared CNTs demonstrated good MW-absorption properties with superior performance which could be due to the combination of the dielectric-type absorption and the interference of multi-reflected MW. This enhancement gave 97% purity of the novel manufactured CNFs. Therefore, we recommend our greener nanoproducts for industries as energy, pharmaceutical, cosmetics, textile, sensors, electronics, vehicles, and both of quantum dots (QD) and fluorescent C-dots.
{"title":"Developed greener method based on MW implementation in manufacturing CNFs","authors":"Loai Aljerf, Rim Nadra","doi":"10.1504/IJNM.2019.10020302","DOIUrl":"https://doi.org/10.1504/IJNM.2019.10020302","url":null,"abstract":"This study comes as the first trial that uses microwave (MW) in combination with assisted chemical vapour deposition (CVD) to generate homogeneous carbon nanofibers (CNFs) at short period thermal reaction. The outcomes confirmed that these materials are of highly-ordered pyrolitic graphite nature. CNFs were obtained having uniform diameters (80-150 nm) and long fibres (0.82-1.75 μm). SEM and TEM evaluations revealed relatively less damage in fractured surfaces and the TGA exhibited insignificant change of CNFs during thermal decomposition. The 'solid' CNFs showed clear properties as disorder, crystalline, and bent graphitic sheets. The as-prepared CNTs demonstrated good MW-absorption properties with superior performance which could be due to the combination of the dielectric-type absorption and the interference of multi-reflected MW. This enhancement gave 97% purity of the novel manufactured CNFs. Therefore, we recommend our greener nanoproducts for industries as energy, pharmaceutical, cosmetics, textile, sensors, electronics, vehicles, and both of quantum dots (QD) and fluorescent C-dots.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46897822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-03-29DOI: 10.1504/IJNM.2019.10020301
Jun Li, Yongkai Tang, Longlong Song, Y. Zhu, D. Zuo
Pad is an important factor, which bears pressure to mechanically remove material in chemical mechanical polishing process. Owing to the abrasives fixed in pad, fixed abrasive pad (FAP) becomes more important and influences material removal and surface quality of wafer. The characteristics of FAP, abrasive type, particle size and matrix hardness, were analysed and the effect on material removal rate (MRR) and surface quality was investigated in fixed abrasive polishing of CaF2 crystal. The results indicated that FAP with 3-5 μm diamond abrasive and soft matrix is suited to polish CaF2 crystal. And the better surface quality with surface roughness Sa 7.27 nm and material removal rate 192 nm/min, can be achieved in fixed abrasive polishing of CaF2 crystal.
{"title":"Effect of FAP characteristics on fixed abrasive polishing of CaF2 crystal","authors":"Jun Li, Yongkai Tang, Longlong Song, Y. Zhu, D. Zuo","doi":"10.1504/IJNM.2019.10020301","DOIUrl":"https://doi.org/10.1504/IJNM.2019.10020301","url":null,"abstract":"Pad is an important factor, which bears pressure to mechanically remove material in chemical mechanical polishing process. Owing to the abrasives fixed in pad, fixed abrasive pad (FAP) becomes more important and influences material removal and surface quality of wafer. The characteristics of FAP, abrasive type, particle size and matrix hardness, were analysed and the effect on material removal rate (MRR) and surface quality was investigated in fixed abrasive polishing of CaF2 crystal. The results indicated that FAP with 3-5 μm diamond abrasive and soft matrix is suited to polish CaF2 crystal. And the better surface quality with surface roughness Sa 7.27 nm and material removal rate 192 nm/min, can be achieved in fixed abrasive polishing of CaF2 crystal.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46304110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-08DOI: 10.1504/IJNM.2019.10018338
W. Lina, Lou Huiqing, L. Wentao, Zong Dingding
The PVDF/PAN/ZrO2 (zirconia) composite fibrous membranes were fabricated by electrospinning. The effects of ZrO2 content on solution properties, mechanical properties and crystallisation behaviours as well as related morphology were systematically evaluated. The scanning electron microscopy (SEM) was used to investigate the effect of ZrO2 content on the morphology of PVDF/PAN/ZrO2 composite fibrous membranes, which showed that the diameter is only 0.8 μm when the ZrO2 is 0.4%. It could be attributed to the enhancement of solution conductivity by ZrO2 addition. Nitrogen adsorption based on Brunauer-Emmett-Teller (BET) principle was employed to measure the specific surface area, which indicated that the specific surface area increased about 1.8 times for composite membranes compared to the PVDF/PAN membrane when the ZrO2 content was 0.4%. The tensile strength of fibrous membranes increased from 2.74 of pure PVDF/PAN to 5.11 MPa of PVDF/PAN/ZrO2 when the ZrO2 content was 0.4%. The differential scanning calorimetry (DSC) results showed that the crystallinity and orientation enhanced with increasing of ZrO2, which was beneficial to improve the tensile strength. The Tg and Tc shifted to high temperature with ZrO2 increases, which demonstrated that ZrO2 promoted the heterogeneous nucleation and formed perfect crystal structure.
{"title":"The effect of nano-zirconia on the morphology and mechanical properties of PVDF/PAN membrane as separators in super capacitors","authors":"W. Lina, Lou Huiqing, L. Wentao, Zong Dingding","doi":"10.1504/IJNM.2019.10018338","DOIUrl":"https://doi.org/10.1504/IJNM.2019.10018338","url":null,"abstract":"The PVDF/PAN/ZrO2 (zirconia) composite fibrous membranes were fabricated by electrospinning. The effects of ZrO2 content on solution properties, mechanical properties and crystallisation behaviours as well as related morphology were systematically evaluated. The scanning electron microscopy (SEM) was used to investigate the effect of ZrO2 content on the morphology of PVDF/PAN/ZrO2 composite fibrous membranes, which showed that the diameter is only 0.8 μm when the ZrO2 is 0.4%. It could be attributed to the enhancement of solution conductivity by ZrO2 addition. Nitrogen adsorption based on Brunauer-Emmett-Teller (BET) principle was employed to measure the specific surface area, which indicated that the specific surface area increased about 1.8 times for composite membranes compared to the PVDF/PAN membrane when the ZrO2 content was 0.4%. The tensile strength of fibrous membranes increased from 2.74 of pure PVDF/PAN to 5.11 MPa of PVDF/PAN/ZrO2 when the ZrO2 content was 0.4%. The differential scanning calorimetry (DSC) results showed that the crystallinity and orientation enhanced with increasing of ZrO2, which was beneficial to improve the tensile strength. The Tg and Tc shifted to high temperature with ZrO2 increases, which demonstrated that ZrO2 promoted the heterogeneous nucleation and formed perfect crystal structure.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46274679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The novel AgVO3/TiO2 nanorod array composite film (NACF) has been prepared by the hydrothermal and subsequent successive ionic layer adsorption methods. The photocatalytic films were characterised by the scanning electron microscopy (SEM), X-ray diffraction (XRD), photoluminescence (PL), and UV-vis diffuse reflectance spectra (UV-vis DRS). The SEM result showed that AgVO3/TiO2 NACF exhibited a well nanorod array structure, and some AgVO3 nanocrystals were deposited on the TiO2 nanorods. The novel AgVO3/TiO2 NACF showed the enhanced visible photocatalytic activity for degradation of methyl orange (MO) compared with the pure TiO2 nanorod array film. The deposition of AgVO3 nanocrystals on the TiO2 nanorod array led to the improved visible light absorption of the composite film due to the narrow bandgap of AgVO3 (less than 2.5 eV). The contact of AgVO3 and TiO2 resulted in the formation of semiconductor heterostructure, which led to the enhanced separation of photogenerated carriers. The improved visible absorption and efficient separation of photogenerated electron-hole pairs should result in the higher visible activity of composite film compared with pure TiO2 nanorod array film.
{"title":"Enhanced photocatalytic activity of AgVO3/TiO2 nanorod array composite film under visible light irradiation","authors":"Tiantian Zhou, Shining Ni, Yundong Wu, Huaikai Li, Yongqiang Cao, Sheng-hao Fu, Xuesen Qin","doi":"10.1504/IJNM.2019.10018336","DOIUrl":"https://doi.org/10.1504/IJNM.2019.10018336","url":null,"abstract":"The novel AgVO3/TiO2 nanorod array composite film (NACF) has been prepared by the hydrothermal and subsequent successive ionic layer adsorption methods. The photocatalytic films were characterised by the scanning electron microscopy (SEM), X-ray diffraction (XRD), photoluminescence (PL), and UV-vis diffuse reflectance spectra (UV-vis DRS). The SEM result showed that AgVO3/TiO2 NACF exhibited a well nanorod array structure, and some AgVO3 nanocrystals were deposited on the TiO2 nanorods. The novel AgVO3/TiO2 NACF showed the enhanced visible photocatalytic activity for degradation of methyl orange (MO) compared with the pure TiO2 nanorod array film. The deposition of AgVO3 nanocrystals on the TiO2 nanorod array led to the improved visible light absorption of the composite film due to the narrow bandgap of AgVO3 (less than 2.5 eV). The contact of AgVO3 and TiO2 resulted in the formation of semiconductor heterostructure, which led to the enhanced separation of photogenerated carriers. The improved visible absorption and efficient separation of photogenerated electron-hole pairs should result in the higher visible activity of composite film compared with pure TiO2 nanorod array film.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44501590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-08DOI: 10.1504/IJNM.2019.10018332
Wang Jin-yan, Chen Xingyu, Sun Min
This paper presents a numerical simulation for the influence of shear-induced crystallisation on the rheological behaviour. The effect of flow on crystallisation is considered through the mathematical relationship between the additional number of nuclei induced by shear treatment and the first normal stress difference. Avrami model is used to describe the crystallisation kinetics. Normalised viscosity, orientation factor and extra stress are simulated with the development of crystallinity. It is found that the short-term shear treatment has a great effect on the crystallisation dynamics of polyethylene, and a small amount of crystallinity cause a strong increase of shear viscosity. Beyond a specific shear strain the stress increases dramatically, which indicate the solidification of the material and the locking-in of stresses.
{"title":"Influence of shear-induced crystallisation on the rheological behaviour of polyethylene","authors":"Wang Jin-yan, Chen Xingyu, Sun Min","doi":"10.1504/IJNM.2019.10018332","DOIUrl":"https://doi.org/10.1504/IJNM.2019.10018332","url":null,"abstract":"This paper presents a numerical simulation for the influence of shear-induced crystallisation on the rheological behaviour. The effect of flow on crystallisation is considered through the mathematical relationship between the additional number of nuclei induced by shear treatment and the first normal stress difference. Avrami model is used to describe the crystallisation kinetics. Normalised viscosity, orientation factor and extra stress are simulated with the development of crystallinity. It is found that the short-term shear treatment has a great effect on the crystallisation dynamics of polyethylene, and a small amount of crystallinity cause a strong increase of shear viscosity. Beyond a specific shear strain the stress increases dramatically, which indicate the solidification of the material and the locking-in of stresses.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46112851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
By means of the facile hydrothermal method, the ultralong β-AgVO3 nanobelts have been synthesised successfully. The properties of the as-prepared β-AgVO3 nanobelts were investigated by the characterisations, such as scanning electron microscope (SEM), X-ray diffraction (XRD), and UV-vis diffuse reflectance spectrum (UV-vis DRS). As shown by the SEM results, the obtained nanobelts showed an ultralong length of hundreds of micrometres and the width in the range of about 60-350 nm. The surface of nanobelt was also very smooth. XRD result exhibited that the AgVO3 nanobelts had a β crystal phase. By the virtue of pumping filtration of AgVO3 nanobelts solution and corresponding post processing, the flexible AgVO3 nano paper was prepared successfully. The AgVO3 nano paper exhibited a well flexibility and photocatalytic activity determined by the degradation of rhodamine B (RhB) under the visible light (λ > 420 nm) irradiation. The possible mechanism for the photocatalytic degradation of RhB by AgVO3 was also proposed correspondingly. It is hoped that the synthesised flexible AgVO3 nano paper would also have the other applications in the fields, such as Li-ion battery, gas sensing, super capacitor, and so on.
{"title":"The study on flexible AgVO3 nano paper and its visible light photocatalytic activity","authors":"Shining Ni, Yingzi Wang, Tiantian Zhou, Huaikai Li, Yundong Wu, Yongqiang Cao, Xuesen Qin, Sheng-hao Fu","doi":"10.1504/IJNM.2019.10018337","DOIUrl":"https://doi.org/10.1504/IJNM.2019.10018337","url":null,"abstract":"By means of the facile hydrothermal method, the ultralong β-AgVO3 nanobelts have been synthesised successfully. The properties of the as-prepared β-AgVO3 nanobelts were investigated by the characterisations, such as scanning electron microscope (SEM), X-ray diffraction (XRD), and UV-vis diffuse reflectance spectrum (UV-vis DRS). As shown by the SEM results, the obtained nanobelts showed an ultralong length of hundreds of micrometres and the width in the range of about 60-350 nm. The surface of nanobelt was also very smooth. XRD result exhibited that the AgVO3 nanobelts had a β crystal phase. By the virtue of pumping filtration of AgVO3 nanobelts solution and corresponding post processing, the flexible AgVO3 nano paper was prepared successfully. The AgVO3 nano paper exhibited a well flexibility and photocatalytic activity determined by the degradation of rhodamine B (RhB) under the visible light (λ > 420 nm) irradiation. The possible mechanism for the photocatalytic degradation of RhB by AgVO3 was also proposed correspondingly. It is hoped that the synthesised flexible AgVO3 nano paper would also have the other applications in the fields, such as Li-ion battery, gas sensing, super capacitor, and so on.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45481321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-08DOI: 10.1504/IJNM.2019.10018334
H. Chen, Long Chen, Peirong Qi, G. Wang, Lei Shi, Xiantao Feng, Feng Yu
We conducted experiments in producing nitrogen-doped carbon foam using pomelo peels as a raw material. Pomelos are a citrus fruit similar in appearance to grapefruit, and native to South and Southeast Asia. Specifically, we fabricated nitrogen-doped pomelo peel derived carbon foam (N-PPCF) by using an ammonia gas treatment. The as-prepared N-PPCF had a high specific surface area of 1,218.5 m2 g−1, an average pore size of 1.36 nm, and a pore volume value of 0.50 cm3 g−1. Additionally, the N-PPCF had a nitrogen content of 8.1%, allowing for a high specific capacitance of 150.1 F g−1 at a density of 1.0 A g−1. Even at 4 A g−1, the N-PPCF still maintained an ideal capacitance of 115.6 F g−1. Ultimately, we believe that nitrogen doped carbon foam is a potential method for treating pomelo peels, and that N-PPCF can function as a potential binder-free supercapacitor electrode.
我们以柚子皮为原料进行了制备氮掺杂碳泡沫的实验。柚子是一种外观类似葡萄柚的柑橘类水果，原产于南亚和东南亚。具体而言，我们通过使用氨气处理制备了氮掺杂柚子皮衍生碳泡沫（N-PPCF）。所制备的N-PPCF具有1218.5 m2 g−1的高比表面积、1.36 nm的平均孔径和0.50 cm3 g−1。此外，N-PPCF的氮含量为8.1%，允许在1.0 a g−1的密度下具有150.1 F g−1高的比电容。即使在4 A g−1的情况下，N-PPCF仍保持115.6 F g−1理想电容。最终，我们相信氮掺杂的碳泡沫是一种潜在的处理柚子皮的方法，并且N-PPCF可以作为一个潜在的无粘合剂超级电容器电极。
{"title":"Creating binder-free supercapacitor electrodes from biomass resources: a nitrogen-doped pomelo peel derived carbon foam","authors":"H. Chen, Long Chen, Peirong Qi, G. Wang, Lei Shi, Xiantao Feng, Feng Yu","doi":"10.1504/IJNM.2019.10018334","DOIUrl":"https://doi.org/10.1504/IJNM.2019.10018334","url":null,"abstract":"We conducted experiments in producing nitrogen-doped carbon foam using pomelo peels as a raw material. Pomelos are a citrus fruit similar in appearance to grapefruit, and native to South and Southeast Asia. Specifically, we fabricated nitrogen-doped pomelo peel derived carbon foam (N-PPCF) by using an ammonia gas treatment. The as-prepared N-PPCF had a high specific surface area of 1,218.5 m2 g−1, an average pore size of 1.36 nm, and a pore volume value of 0.50 cm3 g−1. Additionally, the N-PPCF had a nitrogen content of 8.1%, allowing for a high specific capacitance of 150.1 F g−1 at a density of 1.0 A g−1. Even at 4 A g−1, the N-PPCF still maintained an ideal capacitance of 115.6 F g−1. Ultimately, we believe that nitrogen doped carbon foam is a potential method for treating pomelo peels, and that N-PPCF can function as a potential binder-free supercapacitor electrode.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48757518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-08DOI: 10.1504/IJNM.2019.10018333
R. He, X. Gu, Yulong Zhao, Y. Qiang
In this work, Ag3PO4@PANI particles with a core/shell structure were deposited onto the oriented TiO2 nanorod arrays (NRAs) by a facile dipping route, in order to enhance the visible-light response as well as photoelectrochemical (PEC) performance of TiO2 samples. Furthermore, the crystal structure, morphology, and optical properties of the composites (TiO2 photoanodes) were evaluated by a number of techniques, including scanning and transmission electron microscopy (SEM, TEM), X-ray diffractometry (XRD) and UV-vis spectroscopy. Meanwhile, on/off photocurrent response, and impedance spectroscopy measurements as well as Mott-Schottky analysis were employed to make a characterization over TiO2 photoanodes before and after surface modification. A photocurrent density of 4.0 mA cm−2 is achieved at 0.0 V vs. saturated calomel electrode (SCE) under an illumination of 100 mW/cm2, which is ~2 times higher than that of pristine TiO2 photoanode measured under the same conditions. The performance improvement was mainly attributed to the enhanced visible-light response of TiO2.
在这项工作中，通过简单的浸渍方式将具有核/壳结构的Ag3PO4@PANI颗粒沉积在定向TiO2纳米棒阵列(NRAs)上，以提高TiO2样品的可见光响应和光电化学(PEC)性能。此外，通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、x射线衍射仪(XRD)和紫外可见光谱等多种技术，对复合材料(TiO2光阳极)的晶体结构、形貌和光学性能进行了评价。同时，通过开/关光电流响应、阻抗谱测量以及Mott-Schottky分析对TiO2光阳极表面改性前后进行表征。在100mw /cm2的照度下，饱和甘汞电极(SCE)在0.0 V下获得了4.0 mA cm−2的光电流密度，是在相同条件下测量的原始TiO2光阳极的2倍。性能的提高主要是由于TiO2的可见光响应增强。
{"title":"Surface modification of TiO2 nanorod arrays with Ag3PO4 @ PANI nanoparticles for enhancing photoelectrochemical performance","authors":"R. He, X. Gu, Yulong Zhao, Y. Qiang","doi":"10.1504/IJNM.2019.10018333","DOIUrl":"https://doi.org/10.1504/IJNM.2019.10018333","url":null,"abstract":"In this work, Ag3PO4@PANI particles with a core/shell structure were deposited onto the oriented TiO2 nanorod arrays (NRAs) by a facile dipping route, in order to enhance the visible-light response as well as photoelectrochemical (PEC) performance of TiO2 samples. Furthermore, the crystal structure, morphology, and optical properties of the composites (TiO2 photoanodes) were evaluated by a number of techniques, including scanning and transmission electron microscopy (SEM, TEM), X-ray diffractometry (XRD) and UV-vis spectroscopy. Meanwhile, on/off photocurrent response, and impedance spectroscopy measurements as well as Mott-Schottky analysis were employed to make a characterization over TiO2 photoanodes before and after surface modification. A photocurrent density of 4.0 mA cm−2 is achieved at 0.0 V vs. saturated calomel electrode (SCE) under an illumination of 100 mW/cm2, which is ~2 times higher than that of pristine TiO2 photoanode measured under the same conditions. The performance improvement was mainly attributed to the enhanced visible-light response of TiO2.","PeriodicalId":14170,"journal":{"name":"International Journal of Nanomanufacturing","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43496891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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