ACS Nanoscience Au最新文献

Synergistic Effects of ZnO@NiM′-Layered Double Hydroxide (M′ = Mn, Co, and Fe) Composites on Supercapacitor Performance: A Comparative Evaluation ZnO@NiM′ 层状双氢氧化物（M′ = 锰、钴和铁）复合材料对超级电容器性能的协同效应：比较评估

ACS Nanoscience Au Pub Date : 2024-09-16 DOI: 10.1021/acsnanoscienceau.4c00029

Gaurav Pandey, Surendra Serawat, Kamlendra Awasthi

{"title":"Synergistic Effects of ZnO@NiM′-Layered Double Hydroxide (M′ = Mn, Co, and Fe) Composites on Supercapacitor Performance: A Comparative Evaluation","authors":"Gaurav Pandey, Surendra Serawat, Kamlendra Awasthi","doi":"10.1021/acsnanoscienceau.4c00029","DOIUrl":"https://doi.org/10.1021/acsnanoscienceau.4c00029","url":null,"abstract":"The development of supercapacitors is pivotal for sustainable energy storage solutions, necessitating the advancement of innovative electrode materials to supplant fossil-fuel-based energy sources. Zinc oxide (ZnO) is widely studied for use in supercapacitor electrodes because of its beneficial physicochemical properties, including excellent chemical and thermal stability, semiconducting characteristics, low cost, and environmentally friendly nature. In this study, ZnO nanorods were synthesized using a simple hydrothermal method and then combined with various Ni-based layered double hydroxides (LDHs) [NiM′-LDHs (M′ = Mn, Co, and Fe)] to improve the electrochemical performance of the ZnO nanorods. These LDHs are well-known for their outstanding electrochemical and electronic properties, high specific capacitance, and efficient dispersion of cations within host nanolayers. The synthesized composites ZnO@NiMn-LDH, ZnO@NiCo-LDH, and ZnO@NiFe-LDH exhibit enhanced specific capacitances of 569.3, 284.6, and 133.0 F/g, respectively, at a current rate of 1 A/g, outperforming bare ZnO (98.4 F/g). Notably, ZnO@NiMn-LDH demonstrates superior electrochemical performance along with a capacitance retention of 76%, compared to ZnO@NiCo-LDH (58%), ZnO@NiFe-LDH (49%), and bare ZnO (23%) over 5000 cycles. Furthermore, an asymmetric supercapacitor (ASC) was developed by using ZnO@NiMn-LDH as the positive electrode and activated carbon (AC) as the negative electrode to assess its practical applicability. The fabricated ASC (ZnO@NiMn-LDH//AC) demonstrated a specific capacitance of 45.22 F/g at a current rate of 1 A/g, an energy density of 16.08 W h/kg at a power density of 798.8 W/kg, and a capacitance retention of 75% over 5000 cycles. These findings underscore the potential of the composite formation of ZnO with Ni-based LDHs in advancing the efficiency and durability of supercapacitors.","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142266161","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}

引用次数: 0

Crystal Facet Regulation and Ru Incorporation of Co3O4 for Acidic Oxygen Evolution Reaction Electrocatalysis 用于酸性氧进化反应电催化的 Co3O4 晶体面调节和 Ru 掺杂

ACS Nanoscience Au Pub Date : 2024-09-12 DOI: 10.1021/acsnanoscienceau.4c00037

Mengting Zhao, Hanfeng Liang

{"title":"Crystal Facet Regulation and Ru Incorporation of Co3O4 for Acidic Oxygen Evolution Reaction Electrocatalysis","authors":"Mengting Zhao, Hanfeng Liang","doi":"10.1021/acsnanoscienceau.4c00037","DOIUrl":"https://doi.org/10.1021/acsnanoscienceau.4c00037","url":null,"abstract":"Acidic oxygen evolution reaction (OER) has long been the bottleneck of proton exchange membrane water electrolysis. Ru- and Ir-based oxides are currently state-of-the-art electrocatalysts for acidic OER, but their high cost limits their widespread application. Co3O4 is a promising alternative, yet the performance requires further improvement. Crystal facet engineering can effectively regulate the kinetics of surface electrochemistry and thus enhance the OER performance. However, the facet-dependent OER activity and corrosion behavior of Co3O4 have not been thoroughly studied. In this study, we systematically investigated the OER performance and crystal facet dependency of Co3O4. The results demonstrate that Co3O4 with mixed {111} and {110} facets exhibits better OER activity and stability than Co3O4 with {111} or {100} facets. The surface Co3+ species are responsible for the high OER activity, but its transformation to CoO2 is also the root cause of the dissolution, leading to an activity–stability trade-off effect. The possible approach to addressing this issue would be to increase the Co3+ contents by nanostructure engineering. To further improve the performance, Ru is introduced to the best-performing Co3O4. The resulting Co3O4/RuO2 heterostructure exhibits an overpotential of 257 mV at 10 mA cm–2 and can stably catalyze the OER for 100 h.","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142266119","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}

引用次数: 0

DNA-Mediated Carbon Nanotubes Heterojunction Assembly DNA 介导的碳纳米管异质结组装

ACS Nanoscience Au Pub Date : 2024-09-06 DOI: 10.1021/acsnanoscienceau.4c00025

Zechariah Mengrani, Weiying Hong, Matteo Palma

引用次数: 0

Exploring the Substitution of Fe(III) by Gd(III) in Nanomagnetite 探索纳米磁铁矿中的钆(III)取代铁(III)

ACS Nanoscience Au Pub Date : 2024-09-03 DOI: 10.1021/acsnanoscienceau.4c00032

Carolina Guida, Anthony Chappaz, Agnieszka Poulain, Jean-Marc Grenèche, Alexandre Gloter, Nicolas Menguy, Nathaniel Findling, Laurent Charlet

引用次数: 0

Exploring the Substitution of Fe(III) by Gd(III) in Nanomagnetite 探索纳米磁铁矿中的钆(III)取代铁(III)

IF 4.8

ACS Nanoscience Au Pub Date : 2024-09-03 DOI: 10.1021/acsnanoscienceau.4c0003210.1021/acsnanoscienceau.4c00032

Carolina Guida, Anthony Chappaz*, Agnieszka Poulain, Jean-Marc Grenèche, Alexandre Gloter, Nicolas Menguy, Nathaniel Findling and Laurent Charlet,

引用次数: 0

Interband and Intraband Hot Carrier-Driven Photocatalysis on Plasmonic Bimetallic Nanoparticles: A Case Study of Au–Cu Alloy Nanoparticles 等离子双金属纳米粒子的带间和带内热载流子驱动光催化：金-铜合金纳米粒子的案例研究

ACS Nanoscience Au Pub Date : 2024-08-30 DOI: 10.1021/acsnanoscienceau.4c00035

Mengqi Sun, Ankai Wang, Min Zhang, Shengli Zou, Hui Wang

{"title":"Interband and Intraband Hot Carrier-Driven Photocatalysis on Plasmonic Bimetallic Nanoparticles: A Case Study of Au–Cu Alloy Nanoparticles","authors":"Mengqi Sun, Ankai Wang, Min Zhang, Shengli Zou, Hui Wang","doi":"10.1021/acsnanoscienceau.4c00035","DOIUrl":"https://doi.org/10.1021/acsnanoscienceau.4c00035","url":null,"abstract":"Photoexcited nonthermal electrons and holes in metallic nanoparticles, known as hot carriers, can be judiciously harnessed to drive interesting photocatalytic molecule-transforming processes on nanoparticle surfaces. Interband hot carriers are generated upon direct photoexcitation of electronic transitions between different electronic bands, whereas intraband hot carriers are derived from nonradiative decay of plasmonic electron oscillations. Due to their fundamentally distinct photogeneration mechanisms, these two types of hot carriers differ strikingly from each other in terms of energy distribution profiles, lifetimes, diffusion lengths, and relaxation dynamics, thereby exhibiting remarkably different photocatalytic behaviors. The spectral overlap between plasmon resonances and interband transitions has been identified as a key factor that modulates the interband damping of plasmon resonances, which regulates the relative populations, energy distributions, and photocatalytic efficacies of intraband and interband hot carriers in light-illuminated metallic nanoparticles. As exemplified by the Au–Cu alloy nanoparticles investigated in this work, both the resonant frequencies of plasmons and the energy threshold for the d-to-sp interband transitions can be systematically tuned in bimetallic alloy nanoparticles by varying the compositional stoichiometries and particle sizes. Choosing photocatalytic degradation of Rhodamine B as a model reaction, we elaborate on how the variation of the particle sizes and compositional stoichiometries profoundly influences the photocatalytic efficacies of interband and intraband hot carriers in Au–Cu alloy nanoparticles under different photoexcitation conditions.","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192242","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}

引用次数: 0

Interband and Intraband Hot Carrier-Driven Photocatalysis on Plasmonic Bimetallic Nanoparticles: A Case Study of Au–Cu Alloy Nanoparticles 等离子双金属纳米粒子的带间和带内热载流子驱动光催化：金-铜合金纳米粒子的案例研究

IF 4.8

ACS Nanoscience Au Pub Date : 2024-08-30 DOI: 10.1021/acsnanoscienceau.4c0003510.1021/acsnanoscienceau.4c00035

Mengqi Sun, Ankai Wang, Min Zhang, Shengli Zou and Hui Wang*,

{"title":"Interband and Intraband Hot Carrier-Driven Photocatalysis on Plasmonic Bimetallic Nanoparticles: A Case Study of Au–Cu Alloy Nanoparticles","authors":"Mengqi Sun, Ankai Wang, Min Zhang, Shengli Zou and Hui Wang*, ","doi":"10.1021/acsnanoscienceau.4c0003510.1021/acsnanoscienceau.4c00035","DOIUrl":"https://doi.org/10.1021/acsnanoscienceau.4c00035https://doi.org/10.1021/acsnanoscienceau.4c00035","url":null,"abstract":"Photoexcited nonthermal electrons and holes in metallic nanoparticles, known as hot carriers, can be judiciously harnessed to drive interesting photocatalytic molecule-transforming processes on nanoparticle surfaces. Interband hot carriers are generated upon direct photoexcitation of electronic transitions between different electronic bands, whereas intraband hot carriers are derived from nonradiative decay of plasmonic electron oscillations. Due to their fundamentally distinct photogeneration mechanisms, these two types of hot carriers differ strikingly from each other in terms of energy distribution profiles, lifetimes, diffusion lengths, and relaxation dynamics, thereby exhibiting remarkably different photocatalytic behaviors. The spectral overlap between plasmon resonances and interband transitions has been identified as a key factor that modulates the interband damping of plasmon resonances, which regulates the relative populations, energy distributions, and photocatalytic efficacies of intraband and interband hot carriers in light-illuminated metallic nanoparticles. As exemplified by the Au–Cu alloy nanoparticles investigated in this work, both the resonant frequencies of plasmons and the energy threshold for the d-to-sp interband transitions can be systematically tuned in bimetallic alloy nanoparticles by varying the compositional stoichiometries and particle sizes. Choosing photocatalytic degradation of Rhodamine B as a model reaction, we elaborate on how the variation of the particle sizes and compositional stoichiometries profoundly influences the photocatalytic efficacies of interband and intraband hot carriers in Au–Cu alloy nanoparticles under different photoexcitation conditions.","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsnanoscienceau.4c00035","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142436801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Orally Administered Silver Nanoparticles Are Absorbed and Migrate to Testes in Mice 口服纳米银粒子可被小鼠吸收并迁移至睾丸

ACS Nanoscience Au Pub Date : 2024-08-29 DOI: 10.1021/acsnanoscienceau.4c00021

Yuma Saeki, Kazuma Higashisaka, Rina Izutani, Jiwon Seo, Kazuki Miyaji, Yuya Haga, Yasuo Tsutsumi

引用次数: 0

Orally Administered Silver Nanoparticles Are Absorbed and Migrate to Testes in Mice 口服纳米银粒子可被小鼠吸收并迁移至睾丸

IF 4.8

ACS Nanoscience Au Pub Date : 2024-08-29 DOI: 10.1021/acsnanoscienceau.4c0002110.1021/acsnanoscienceau.4c00021

Yuma Saeki, Kazuma Higashisaka*, Rina Izutani, Jiwon Seo, Kazuki Miyaji, Yuya Haga and Yasuo Tsutsumi*,

{"title":"Orally Administered Silver Nanoparticles Are Absorbed and Migrate to Testes in Mice","authors":"Yuma Saeki, Kazuma Higashisaka*, Rina Izutani, Jiwon Seo, Kazuki Miyaji, Yuya Haga and Yasuo Tsutsumi*, ","doi":"10.1021/acsnanoscienceau.4c0002110.1021/acsnanoscienceau.4c00021","DOIUrl":"https://doi.org/10.1021/acsnanoscienceau.4c00021https://doi.org/10.1021/acsnanoscienceau.4c00021","url":null,"abstract":"Given that daily exposure to nanoparticles is now unavoidable, there are concerns that nanoparticles have unexpected biological effects due to their small size. Here, we examined the biodistribution of silver nanoparticles, which are the most frequently used nanoparticles owing to their antibacterial activity, with a diameter of 10 nm (nAg10) to the male genital tract, and the effects of paternal treatment with nAg10 on fetal development. Male Slc:ICR male mice were orally treated with nAg10 for 14 consecutive days. Inductively coupled plasma mass spectrometry analysis detected silver in the blood and testis of male mice, but no general toxicological effects were induced. Moreover, there were no significant changes in fetal development when these treated male mice were mated with nontreated female mice. This implies that although orally ingested nAg10 is distributed to the male genital tract, it does not affect fetal development under the present treatment conditions.","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsnanoscienceau.4c00021","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142436865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing Electrocatalytic Semihydrogenation of Alkynes via Weakening Alkene Adsorption over Electron-Depleted Cu Nanowires 通过削弱贫电子铜纳米线对烯的吸附来增强炔烃的电催化半加氢反应

ACS Nanoscience Au Pub Date : 2024-08-08 DOI: 10.1021/acsnanoscienceau.4c00030

Dan Luo, Zhiheng Xie, Shuangqun Chen, Tianyi Yang, Yalin Guo, Ying Liu, Zhouhao Zhu, Liyong Gan, Lingmei Liu, Jianfeng Huang

{"title":"Enhancing Electrocatalytic Semihydrogenation of Alkynes via Weakening Alkene Adsorption over Electron-Depleted Cu Nanowires","authors":"Dan Luo, Zhiheng Xie, Shuangqun Chen, Tianyi Yang, Yalin Guo, Ying Liu, Zhouhao Zhu, Liyong Gan, Lingmei Liu, Jianfeng Huang","doi":"10.1021/acsnanoscienceau.4c00030","DOIUrl":"https://doi.org/10.1021/acsnanoscienceau.4c00030","url":null,"abstract":"Electrochemical semihydrogenation (ESH) of alkynes to alkenes is an appealing technique for producing pharmaceutical precursors and polymer monomers, while also preventing catalyst poisoning by alkyne impurities. Cu is recognized as a cost-effective and highly selective catalyst for ESH, whereas its activity is somewhat limited. Here, from a mechanistic standpoint, we hypothesize that electron-deficient Cu can enhance ESH activity by promoting the rate-determining step of alkene desorption. We test this hypothesis by utilizing Cu–Ag hybrids as electrocatalysts, developed through a welding process of Ag nanoparticles with Cu nanowires. Our findings reveal that these rationally engineered Cu–Ag hybrids exhibit a notable enhancement (2–4 times greater) in alkyne conversion rates compared to isolated Ag NPs or Cu NWs, while maintaining over 99% selectivity for alkene products. Through a combination of operando and computational studies, we verify that the electron-depleted Cu sites, resulting from electron transfer between Ag nanoparticles and Cu nanowires, effectively weaken the adsorption of alkenes, thereby substantially boosting ESH activity. This work not only provides mechanistic insights into ESH but also stimulates compelling strategies involving hybridizing distinct metals to optimize ESH activity.","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141937714","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}

引用次数: 0