Pub Date : 2024-01-04DOI: 10.1080/14686996.2023.2300697
Saidatul Sophia Sha’rani, Mohamed Mahmoud Nasef, Nurfatehah Wahyuny Che Jusoh, Eleen Dayana Mohamed Isa, Roshafima Rasit Ali
A selective composite membrane for vanadium redox flow battery (VRFB) was successfully prepared by layer-by-layer (LbL) technique using a perfluorosulfonic sulfonic acid or Nafion 117 (N117). The c...
{"title":"Highly-selective layer-by-layer membrane modified with polyethylenimine and graphene oxide for vanadium redox flow battery","authors":"Saidatul Sophia Sha’rani, Mohamed Mahmoud Nasef, Nurfatehah Wahyuny Che Jusoh, Eleen Dayana Mohamed Isa, Roshafima Rasit Ali","doi":"10.1080/14686996.2023.2300697","DOIUrl":"https://doi.org/10.1080/14686996.2023.2300697","url":null,"abstract":"A selective composite membrane for vanadium redox flow battery (VRFB) was successfully prepared by layer-by-layer (LbL) technique using a perfluorosulfonic sulfonic acid or Nafion 117 (N117). The c...","PeriodicalId":21588,"journal":{"name":"Science and Technology of Advanced Materials","volume":"20 1","pages":""},"PeriodicalIF":5.5,"publicationDate":"2024-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139373547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sustainable social activity is a major goal in an aging society, although this is limited by loss of athleticism, with osteoporosis-related fractures being the most common cause of long-term behavi...
{"title":"Site-activatable targeting of macromolecular alendronate for accelerated fracture healing","authors":"Makoto Matsui, Yuka Kaihara, Yuto Honda, Nobuhiro Nishiyama, Yutaka Miura","doi":"10.1080/14686996.2023.2286218","DOIUrl":"https://doi.org/10.1080/14686996.2023.2286218","url":null,"abstract":"Sustainable social activity is a major goal in an aging society, although this is limited by loss of athleticism, with osteoporosis-related fractures being the most common cause of long-term behavi...","PeriodicalId":21588,"journal":{"name":"Science and Technology of Advanced Materials","volume":"16 3","pages":""},"PeriodicalIF":5.5,"publicationDate":"2023-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138512825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-09DOI: 10.1080/14686996.2023.2274818
Seung Hoon Yoo, Minsu Kim, Han Jun Park, Ga in Lee, Sung Ho Lee, Moon Kyu Kwak
A gecko foot-inspired, mushroom-shaped artificial dry adhesive exploiting intermolecular forces between microstructure and surface has drawn research attention for its strong adhesive force. However, the high pull-off strength corresponding to the adhesive force matters when detaching fragile substrates. In this study, we present a vacuum-powered soft actuator with the dry adhesive, embeds oblique air chambers. The soft actuator performs coupled contraction and twisting by applying negative pneumatic pressure inward and exhibits not only high pull-off strength but also easy detachment. This effective detachment can be achieved thanks to twisting motion of soft actuator. The detachment performances of the actuator models are assessed using a 6-DOF robot arm. Results show that the soft actuators exhibit remarkable pull-off strength decrement from ~ 20 N cm−2 to ~ 2 N cm−2 due to the twisting. Finally, to verify a feasible application of this study, we utilize the inherent compliance of the actuators and introduce a glass transfer system for which a glass substrate on a slope is gripped by the flexibility of the soft actuators and delivers to the destination without any fracture.
一种以壁虎脚为灵感，利用微观结构与表面之间分子间作用力的蘑菇形人工干胶因其强附着力而受到研究的关注。然而，在剥离易碎的基材时，与粘合力相对应的高拉脱强度很重要。在这项研究中，我们提出了一种真空动力软驱动器与干胶，嵌入斜气室。软执行器执行耦合收缩和扭转施加负气压向内，不仅表现出高的拉离强度，但也容易脱离。由于软致动器的扭转运动，这种有效的分离可以实现。采用六自由度机械臂对各作动器模型的分离性能进行了评估。结果表明，由于扭转作用，软致动器的拉脱强度从~ 20 N cm−2下降到~ 2 N cm−2。最后，为了验证本研究的可行应用，我们利用致动器固有的顺应性，并引入了一个玻璃传递系统，在这个系统中，斜坡上的玻璃基板被软致动器的灵活性抓住，并在没有任何断裂的情况下传递到目的地。
{"title":"Vacuum-powered soft actuator with oblique air chambers for easy detachment of artificial dry adhesive by coupled contraction and twisting","authors":"Seung Hoon Yoo, Minsu Kim, Han Jun Park, Ga in Lee, Sung Ho Lee, Moon Kyu Kwak","doi":"10.1080/14686996.2023.2274818","DOIUrl":"https://doi.org/10.1080/14686996.2023.2274818","url":null,"abstract":"A gecko foot-inspired, mushroom-shaped artificial dry adhesive exploiting intermolecular forces between microstructure and surface has drawn research attention for its strong adhesive force. However, the high pull-off strength corresponding to the adhesive force matters when detaching fragile substrates. In this study, we present a vacuum-powered soft actuator with the dry adhesive, embeds oblique air chambers. The soft actuator performs coupled contraction and twisting by applying negative pneumatic pressure inward and exhibits not only high pull-off strength but also easy detachment. This effective detachment can be achieved thanks to twisting motion of soft actuator. The detachment performances of the actuator models are assessed using a 6-DOF robot arm. Results show that the soft actuators exhibit remarkable pull-off strength decrement from ~ 20 N cm−2 to ~ 2 N cm−2 due to the twisting. Finally, to verify a feasible application of this study, we utilize the inherent compliance of the actuators and introduce a glass transfer system for which a glass substrate on a slope is gripped by the flexibility of the soft actuators and delivers to the destination without any fracture.","PeriodicalId":21588,"journal":{"name":"Science and Technology of Advanced Materials","volume":" 39","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135191551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-06DOI: 10.1080/14686996.2023.2271912
Yahaya Saadu Itas, Razif Razali, Salisu Tata, Mohammed Kolo, Hamid Osman, Abubakr M. Idris, Mayeen Uddin Khandaker
This work investigated the fundamental photocatalytic properties of nitrogen-doped single-walled silicon carbide nanotubes (N-doped SWSiCNTs) for hydrogen evolution for the first time. Investigations of the structural, mechanical, electronic, and optical properties of the studied systems were carried out using popular density functional theory implemented in quantum ESPRESSO and Yambo codes. Analysis of the structural properties revealed high mechanical stability with the 3.6% and 7.4% N-doped SWSiCNT. The calculated band gap of the N-doped SWSiCNT with 3.6% demonstrated a value of 2.56 eV which is within the photocatalytic range of 2.3 eV – 2.8 eV. The hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) potentials of the 3.6% N-doped SWSiCNT also showed good agreement with previous theoretical data. The studied material showed the best photocatalytic performance in both parallel and perpendicular directions by absorbing photons in the visible region. Therefore, the observed structural, mechanical, electronic and optical behaviors demonstrated by the 3.6% N-doped SWSiCNT exposed it as a better photocatalyst for hydrogen production under visible light.
本文首次研究了氮掺杂单壁碳化硅纳米管(n掺杂SWSiCNTs)析氢的基本光催化性能。利用在量子ESPRESSO和Yambo代码中实现的流行密度泛函理论，对所研究系统的结构、机械、电子和光学性质进行了研究。结构性能分析表明，掺氮3.6%和7.4%的SWSiCNT具有较高的机械稳定性。计算出掺氮3.6%的SWSiCNT的带隙为2.56 eV，在2.3 eV ~ 2.8 eV的光催化范围内。3.6% n掺杂SWSiCNT的析氢反应(HER)和析氧反应(OER)电位也与先前的理论数据吻合良好。所研究的材料在平行和垂直方向上都表现出最好的光催化性能，吸收可见光区的光子。因此，观察到的3.6% n掺杂SWSiCNT的结构、力学、电子和光学行为表明，它在可见光下是一种更好的产氢光催化剂。
{"title":"Structural, mechanical, electronic and optical properties of N-decorated single-walled silicon carbide nanotube photocatalyst for hydrogen evolution via water splitting: a DFT study","authors":"Yahaya Saadu Itas, Razif Razali, Salisu Tata, Mohammed Kolo, Hamid Osman, Abubakr M. Idris, Mayeen Uddin Khandaker","doi":"10.1080/14686996.2023.2271912","DOIUrl":"https://doi.org/10.1080/14686996.2023.2271912","url":null,"abstract":"This work investigated the fundamental photocatalytic properties of nitrogen-doped single-walled silicon carbide nanotubes (N-doped SWSiCNTs) for hydrogen evolution for the first time. Investigations of the structural, mechanical, electronic, and optical properties of the studied systems were carried out using popular density functional theory implemented in quantum ESPRESSO and Yambo codes. Analysis of the structural properties revealed high mechanical stability with the 3.6% and 7.4% N-doped SWSiCNT. The calculated band gap of the N-doped SWSiCNT with 3.6% demonstrated a value of 2.56 eV which is within the photocatalytic range of 2.3 eV – 2.8 eV. The hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) potentials of the 3.6% N-doped SWSiCNT also showed good agreement with previous theoretical data. The studied material showed the best photocatalytic performance in both parallel and perpendicular directions by absorbing photons in the visible region. Therefore, the observed structural, mechanical, electronic and optical behaviors demonstrated by the 3.6% N-doped SWSiCNT exposed it as a better photocatalyst for hydrogen production under visible light.","PeriodicalId":21588,"journal":{"name":"Science and Technology of Advanced Materials","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135585023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bioactive glass nanoparticles (BGNs) are good bioactive materials for clinical treatment because of their unique composition and silica-oxygen network structure. Herein, we designed and reported a monodisperse mesoporous bioactive glass nanoparticles with biomineralization activity for surgical hemorrhage control. The results indicated that the BGNs have excellent biomineralization ability. In vivo and in vitro hemostasis studies suggested that BGNs has superior hemostatic properties to GZ (gauze) and GS (commercial gelatin sponge) and validated in vitro thrombosis, platelet adhesion, cytocompatibility and blood compatibility. The particles activated both endogenous and exogenous physiological coagulation pathways and could activate platelets and release Ca2+ to participate in the clotting pathway. Besides, the BGNs have good biocompatibility in vivo. These findings demonstrated the potential of small diameter mesoporous bioactive glass nanoparticles are likely useful for bleeding control as potential hemostatic agents.
{"title":"Mesoporous bioactive glass nanoparticles with biomineralization activity for surgical hemorrhage control","authors":"Shengyu Li, Xijin Wu, Jianglin Chen, Jinwei Wang, Lihong Gong, Jianyu Ni, Saifei Xi, Hong Zhang, Huiying Fu, Qiyang Shou","doi":"10.1080/14686996.2023.2279030","DOIUrl":"https://doi.org/10.1080/14686996.2023.2279030","url":null,"abstract":"Bioactive glass nanoparticles (BGNs) are good bioactive materials for clinical treatment because of their unique composition and silica-oxygen network structure. Herein, we designed and reported a monodisperse mesoporous bioactive glass nanoparticles with biomineralization activity for surgical hemorrhage control. The results indicated that the BGNs have excellent biomineralization ability. In vivo and in vitro hemostasis studies suggested that BGNs has superior hemostatic properties to GZ (gauze) and GS (commercial gelatin sponge) and validated in vitro thrombosis, platelet adhesion, cytocompatibility and blood compatibility. The particles activated both endogenous and exogenous physiological coagulation pathways and could activate platelets and release Ca2+ to participate in the clotting pathway. Besides, the BGNs have good biocompatibility in vivo. These findings demonstrated the potential of small diameter mesoporous bioactive glass nanoparticles are likely useful for bleeding control as potential hemostatic agents.","PeriodicalId":21588,"journal":{"name":"Science and Technology of Advanced Materials","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135679832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The objective of this study was to determine whether degradation products from spongy gelatin scaffolds can enhance angiogenesis and orthotopic bone regeneration. Spongy gelatin disks were prepared using gelatin solution concentrations ranging from 1% to 7% (v/w) within cylindrical tubes through programmed freezing, lyophilization, cutting, and dehydrothermal crosslinking and implanted in critical-sized defects of rat calvaria for up to 8 weeks. Analyses of disk implantation into rat calvaria defects by microfocus X-ray computed tomography and histomorphometry indicated that the bone volume was significantly larger in the 5% and 7% gelatin sponge groups than in the 1% and 3% gelatin sponge groups and tended to increase progressively from 5% to 7%. The histomorphometric analysis also showed that the largest number of new vessels was formed in the defect treated with 5% gealtin sponge compared to other gelatin sponges. Immunohistochemistry of matrix metalloproteinase (MMP) indicated that the gelatin concentration in the disks affected the appearance of MMP-2 and MMP-9 positive cells around the skeleton of the gelatin sponges. The degradation products of gelatin by MMP-9 and prolyl endopeptidase enhanced the formation of a capillary-like structure in human umbilical vein endothelial cells in vitro. These results suggested that the higher-density gelatin sponges tended to supply their own molecules via biodegradation, resulting in enhanced orthotopic osteogenesis through the expected function of gelatin molecules in angiogenesis and bone formation.
{"title":"Effects of degradation products from gelatin spongy scaffolds on angio-osteogenic capacity","authors":"Takanori Hatakeyama, Ryo Hamai, Yukari Shiwaku, Takahisa Anada, Susumu Sakai, Tomoya Sato, Kazuyoshi Baba, Keiichi Sasaki, Osamu Suzuki","doi":"10.1080/14686996.2023.2277675","DOIUrl":"https://doi.org/10.1080/14686996.2023.2277675","url":null,"abstract":"The objective of this study was to determine whether degradation products from spongy gelatin scaffolds can enhance angiogenesis and orthotopic bone regeneration. Spongy gelatin disks were prepared using gelatin solution concentrations ranging from 1% to 7% (v/w) within cylindrical tubes through programmed freezing, lyophilization, cutting, and dehydrothermal crosslinking and implanted in critical-sized defects of rat calvaria for up to 8 weeks. Analyses of disk implantation into rat calvaria defects by microfocus X-ray computed tomography and histomorphometry indicated that the bone volume was significantly larger in the 5% and 7% gelatin sponge groups than in the 1% and 3% gelatin sponge groups and tended to increase progressively from 5% to 7%. The histomorphometric analysis also showed that the largest number of new vessels was formed in the defect treated with 5% gealtin sponge compared to other gelatin sponges. Immunohistochemistry of matrix metalloproteinase (MMP) indicated that the gelatin concentration in the disks affected the appearance of MMP-2 and MMP-9 positive cells around the skeleton of the gelatin sponges. The degradation products of gelatin by MMP-9 and prolyl endopeptidase enhanced the formation of a capillary-like structure in human umbilical vein endothelial cells in vitro. These results suggested that the higher-density gelatin sponges tended to supply their own molecules via biodegradation, resulting in enhanced orthotopic osteogenesis through the expected function of gelatin molecules in angiogenesis and bone formation.","PeriodicalId":21588,"journal":{"name":"Science and Technology of Advanced Materials","volume":"10 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135821135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-03DOI: 10.1080/14686996.2023.2278443
Sebastian Wood, Filipe Richheimer, Tom Vincent, Vivian Tong, Alessandro Catanzaro, Yameng Cao, Olga Kazakova, Fernando Araujo de Castro
Localised emission from defect states in monolayer transition metal dichalcogenides is of great interest for optoelectronic and quantum device applications. Recent progress towards high temperature localised emission relies on the application of strain to induce highly confined excitonic states. Here we propose an alternative paradigm based on curvature, rather than in-plane stretching, achieved through free-standing wrinkles of monolayer tungsten diselenide (WSe2). We probe these nanostructures using tip-enhanced optical spectroscopy to reveal the spatial localisation of out-of-plane polarised emission from the WSe2 wrinkles. Based on the photoluminescence and Raman scattering signatures resolved with nanoscale spatial resolution, we propose the existence of a manifold of spin-forbidden excitonic states that are activated by the local curvature of the WSe2. We are able to access these dark states through the out-of-plane polarised surface plasmon polariton resulting in enhanced strongly localised emission at room temperature, which is of potential interest for quantum technologies and photonic devices.
{"title":"Curvature-enhanced localised emission from dark states in wrinkled monolayer WSe <sub>2</sub> at room temperature","authors":"Sebastian Wood, Filipe Richheimer, Tom Vincent, Vivian Tong, Alessandro Catanzaro, Yameng Cao, Olga Kazakova, Fernando Araujo de Castro","doi":"10.1080/14686996.2023.2278443","DOIUrl":"https://doi.org/10.1080/14686996.2023.2278443","url":null,"abstract":"Localised emission from defect states in monolayer transition metal dichalcogenides is of great interest for optoelectronic and quantum device applications. Recent progress towards high temperature localised emission relies on the application of strain to induce highly confined excitonic states. Here we propose an alternative paradigm based on curvature, rather than in-plane stretching, achieved through free-standing wrinkles of monolayer tungsten diselenide (WSe2). We probe these nanostructures using tip-enhanced optical spectroscopy to reveal the spatial localisation of out-of-plane polarised emission from the WSe2 wrinkles. Based on the photoluminescence and Raman scattering signatures resolved with nanoscale spatial resolution, we propose the existence of a manifold of spin-forbidden excitonic states that are activated by the local curvature of the WSe2. We are able to access these dark states through the out-of-plane polarised surface plasmon polariton resulting in enhanced strongly localised emission at room temperature, which is of potential interest for quantum technologies and photonic devices.","PeriodicalId":21588,"journal":{"name":"Science and Technology of Advanced Materials","volume":"14 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135820415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-31DOI: 10.1080/14686996.2023.2277678
Kadhim Al-Attafi, Amar Al-Keisy, Muhammad A. Alsherbiny, Jung Ho Kim
{"title":"Zn <sub>2</sub> SnO <sub>4</sub> ternary metal oxide for ultraviolet radiation filter application: a comparative study with TiO <sub>2</sub> and ZnO","authors":"Kadhim Al-Attafi, Amar Al-Keisy, Muhammad A. Alsherbiny, Jung Ho Kim","doi":"10.1080/14686996.2023.2277678","DOIUrl":"https://doi.org/10.1080/14686996.2023.2277678","url":null,"abstract":"","PeriodicalId":21588,"journal":{"name":"Science and Technology of Advanced Materials","volume":"160 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135869769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
As an important part of water splitting, the oxygen evolution reaction (OER) requires efficient, low-cost, and stable catalysts to overcome its sluggish kinetic barrier. In this study, based on previously reported OER catalyst materials of boron monosulfide mixed with graphene (r-BS+G), nickel foam (NF) is introduced as a supporting material for an r-BS+G electrocatalyst. The resulting r-BS+G-NF exhibits a very low overpotential at 10 (245 mV), 100 (308 mV), and 500 (405 mV) mA cm–2, with a low Tafel slope (56 mV dec–1). In addition, r-BS+G-NF exhibits high durability and can maintain high activity for more than 100 h at 100 mA cm–2. This is in sharp contrast to the catalyst without graphene (r-BS+NF), which shows lower durability. The results suggest that the unique morphology of the NF provides a large electrochemically active area and exposes more active sites on the surface of the prepared electrocatalyst, while the flexible graphene sheets play an important role as a support for effectively combining r-BS and NF. Consequently, the self-supporting structure can improve the OER performance as well as stability. Therefore, this study provides a promising strategy for use as an efficient and stable OER catalyst at high current densities.
析氧反应(OER)作为水裂解的重要环节，需要高效、低成本、稳定的催化剂来克服其缓慢的动力学屏障。本研究在前人报道的单硫化硼与石墨烯(r-BS+G)混合的OER催化剂材料的基础上，引入了泡沫镍(NF)作为r-BS+G电催化剂的支撑材料。得到的r-BS+G-NF在10 (245 mV)、100 (308 mV)和500 (405 mV) mA cm-2时表现出非常低的过电位，具有低的塔菲尔斜率(56 mV dec1)。此外，r-BS+G-NF具有较高的耐久性，在100 mA cm-2下可保持100小时以上的高活性。这与不含石墨烯的催化剂(r-BS+NF)形成鲜明对比，后者的耐久性较低。结果表明，NF的独特形貌为制备的电催化剂提供了更大的电化学活性区域，并在其表面暴露出更多的活性位点，而柔性石墨烯片则为r-BS和NF的有效结合发挥了重要的支撑作用。因此，自支撑结构可以提高OER性能和稳定性。因此，该研究为在高电流密度下作为高效稳定的OER催化剂提供了一种有前途的策略。
{"title":"Development of a highly stable nickel-foam-based boron monosulfide–graphene electrocatalyst with a high current density for the oxygen evolution reaction","authors":"Linghui Li, Norinobu Watanabe, Cheng Jiang, Akiyasu Yamamoto, Takeshi Fujita, Masashi Miyakawa, Takashi Taniguchi, Hideo Hosono, Takahiro Kondo","doi":"10.1080/14686996.2023.2277681","DOIUrl":"https://doi.org/10.1080/14686996.2023.2277681","url":null,"abstract":"As an important part of water splitting, the oxygen evolution reaction (OER) requires efficient, low-cost, and stable catalysts to overcome its sluggish kinetic barrier. In this study, based on previously reported OER catalyst materials of boron monosulfide mixed with graphene (r-BS+G), nickel foam (NF) is introduced as a supporting material for an r-BS+G electrocatalyst. The resulting r-BS+G-NF exhibits a very low overpotential at 10 (245 mV), 100 (308 mV), and 500 (405 mV) mA cm–2, with a low Tafel slope (56 mV dec–1). In addition, r-BS+G-NF exhibits high durability and can maintain high activity for more than 100 h at 100 mA cm–2. This is in sharp contrast to the catalyst without graphene (r-BS+NF), which shows lower durability. The results suggest that the unique morphology of the NF provides a large electrochemically active area and exposes more active sites on the surface of the prepared electrocatalyst, while the flexible graphene sheets play an important role as a support for effectively combining r-BS and NF. Consequently, the self-supporting structure can improve the OER performance as well as stability. Therefore, this study provides a promising strategy for use as an efficient and stable OER catalyst at high current densities.","PeriodicalId":21588,"journal":{"name":"Science and Technology of Advanced Materials","volume":" 17","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135813589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-26DOI: 10.1080/14686996.2023.2273803
Mitchell A Gabalski, Kylie Smith, Jeremy Hix, Kurt R. Zinn
{"title":"Comparisons of 3D printed materials for biomedical imaging applications","authors":"Mitchell A Gabalski, Kylie Smith, Jeremy Hix, Kurt R. Zinn","doi":"10.1080/14686996.2023.2273803","DOIUrl":"https://doi.org/10.1080/14686996.2023.2273803","url":null,"abstract":"","PeriodicalId":21588,"journal":{"name":"Science and Technology of Advanced Materials","volume":"56 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134907206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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