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BeP2 Monolayer Exhibits Ultra-high and Highly Anisotropic Carrier Mobility and 29.3 % Photovoltaic Efficiency
IF 6.7 3区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2025-01-09 DOI: 10.1039/d4nr04756g
CP Sun, Yiming Zhang, Meiling Xu, Feilong Wang, Wenwen Cui, Caoping Niu, Yinwei Li
Two-dimensional materials with a combination of a moderate bandgap, highly anisotropic carrier mobility, and a planar structure are highly desirable for nanoelectronic devices. This study predicts a planar BeP2 monolayer with hexagonal symmetry that meets aforementioned desirable criteria, using the CALYPSO method and first-principles calculations. Calculations of electronic properties demonstrate that the hexagonal BeP2 monolayer is an intrinsic semiconductor with a direct band gap of approximately 0.94 eV and this direct bandgap characteristic is maintained under strain. The mobilities of hexagonal BeP2 are electron-dominated, reaching ~ 105 cm2 V-1 s-1, which is two orders of magnitude higher than the mobility of holes. The high carrier mobility results from the small deformation potential constant, which arises from the unique decoupling behavior of electrons in the valence and conduction bands. Furthermore, our calculations revealed that the photovoltaic efficiency of hex-BeP2 is as high as 29.3 %, which is comparable to well-known thin-film solar cell absorbers, thanks to its high visible light absorption coefficient of ~ 105 cm-1 and its direct bandgap feature.
{"title":"BeP2 Monolayer Exhibits Ultra-high and Highly Anisotropic Carrier Mobility and 29.3 % Photovoltaic Efficiency","authors":"CP Sun, Yiming Zhang, Meiling Xu, Feilong Wang, Wenwen Cui, Caoping Niu, Yinwei Li","doi":"10.1039/d4nr04756g","DOIUrl":"https://doi.org/10.1039/d4nr04756g","url":null,"abstract":"Two-dimensional materials with a combination of a moderate bandgap, highly anisotropic carrier mobility, and a planar structure are highly desirable for nanoelectronic devices. This study predicts a planar BeP<small><sub>2</sub></small> monolayer with hexagonal symmetry that meets aforementioned desirable criteria, using the CALYPSO method and first-principles calculations. Calculations of electronic properties demonstrate that the hexagonal BeP<small><sub>2</sub></small> monolayer is an intrinsic semiconductor with a direct band gap of approximately 0.94 eV and this direct bandgap characteristic is maintained under strain. The mobilities of hexagonal BeP<small><sub>2</sub></small> are electron-dominated, reaching ~ 10<small><sup>5</sup></small> cm<small><sup>2</sup></small> V<small><sup>-1</sup></small> s<small><sup>-1</sup></small>, which is two orders of magnitude higher than the mobility of holes. The high carrier mobility results from the small deformation potential constant, which arises from the unique decoupling behavior of electrons in the valence and conduction bands. Furthermore, our calculations revealed that the photovoltaic efficiency of hex-BeP<small><sub>2</sub></small> is as high as 29.3 %, which is comparable to well-known thin-film solar cell absorbers, thanks to its high visible light absorption coefficient of ~ 10<small><sup>5</sup></small> cm<small><sup>-1</sup></small> and its direct bandgap feature.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"28 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142936985","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}
引用次数: 0
Mitochondria Targeting Nanostructures from Enzymatically Degradable Fluorescent Amphiphilic Polyesters
IF 6.7 3区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2025-01-09 DOI: 10.1039/d4nr04696j
Subhendu Biswas, Priya Rajdev, Ankita Banerjee, Anindita Das
Water-soluble π-conjugated luminescent bioprobes have been broadly used in biomedical research but are limited by the nonbiodegradability associated with their rigid C−C backbones. In the present work, we introduced three naphthalene monoimide (NMI)-functionalized amphiphilic fluorescent polyesters (P1, P2, and P3) prepared by transesterification of functional diols with an activated diester monomer of adipic acid. These polyesters featured a side-chain NMI fluorophore, imparting the required hydrophobicity for self-assembly in water and endowing the polymeric nanoassemblies with green fluorescence. Two polymers (P1 and P2) were intrinsically cationic at physiological pH (7.4), while neutral P3 exhibited pH-triggered (pH ~ 6.2) cationic features due to the protonation of the tertiary amine groups present in its backbone. These biocompatible polymers revealed around 85% cellular uptake after 1 hour of incubation. However, the initial uptake for the cationic polymers (P1 and P2) within 15 minutes was significantly greater than that of the neutral P3 because of their stronger electrostatic interactions with the negatively charged cell membranes. Notably, cationic P1 and P2 could specifically target mitochondria in cancerous HeLa cells by escaping the initial endosome/lysosome trap. On the contrary, neutral P3 exhibited cell-selective mitochondria targeting in cancerous (HeLa) cells over non-cancerous (NKE) cells. This is attributed to P3’s protonation-induced positive charge accumulation in the acidic environment of cancer cells, unlike in the non-acidic environment of non-cancerous cells. Possibly, this causes P3 nanoassemblies to behave similarly to P1 and P2 in HeLa cells despite P3 being intrinsically neutral. The insights gained from this work may be relevant for future development of cell-specific, mitochondria-targeted drug delivery systems from enzymatically degradable polyester backbones.
{"title":"Mitochondria Targeting Nanostructures from Enzymatically Degradable Fluorescent Amphiphilic Polyesters","authors":"Subhendu Biswas, Priya Rajdev, Ankita Banerjee, Anindita Das","doi":"10.1039/d4nr04696j","DOIUrl":"https://doi.org/10.1039/d4nr04696j","url":null,"abstract":"Water-soluble π-conjugated luminescent bioprobes have been broadly used in biomedical research but are limited by the nonbiodegradability associated with their rigid C−C backbones. In the present work, we introduced three naphthalene monoimide (NMI)-functionalized amphiphilic fluorescent polyesters (<strong>P1</strong>, <strong>P2</strong>, and <strong>P3</strong>) prepared by transesterification of functional diols with an activated diester monomer of adipic acid. These polyesters featured a side-chain NMI fluorophore, imparting the required hydrophobicity for self-assembly in water and endowing the polymeric nanoassemblies with green fluorescence. Two polymers (<strong>P1</strong> and <strong>P2</strong>) were intrinsically cationic at physiological pH (7.4), while neutral <strong>P3</strong> exhibited pH-triggered (pH ~ 6.2) cationic features due to the protonation of the tertiary amine groups present in its backbone. These biocompatible polymers revealed around 85% cellular uptake after 1 hour of incubation. However, the initial uptake for the cationic polymers (<strong>P1 </strong>and <strong>P2</strong>) within 15 minutes was significantly greater than that of the neutral <strong>P3</strong> because of their stronger electrostatic interactions with the negatively charged cell membranes. Notably, cationic <strong>P1</strong> and <strong>P2</strong> could specifically target mitochondria in cancerous HeLa cells by escaping the initial endosome/lysosome trap. On the contrary, neutral <strong>P3</strong> exhibited cell-selective mitochondria targeting in cancerous (HeLa) cells over non-cancerous (NKE) cells. This is attributed to <strong>P3</strong>’s protonation-induced positive charge accumulation in the acidic environment of cancer cells, unlike in the non-acidic environment of non-cancerous cells. Possibly, this causes <strong>P3</strong> nanoassemblies to behave similarly to <strong>P1 </strong> and <strong>P2</strong> in HeLa cells despite <strong>P3</strong> being intrinsically neutral. The insights gained from this work may be relevant for future development of cell-specific, mitochondria-targeted drug delivery systems from enzymatically degradable polyester backbones.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"23 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142936991","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}
引用次数: 0
Correction: Camptothecin-based prodrug nanomedicines for cancer therapy
IF 6.7 3区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2025-01-09 DOI: 10.1039/d4nr90241f
Renshuai Zhang, Jing Yu, Zhu Guo, Hongfei Jiang, Chao Wang
Correction for ‘Camptothecin-based prodrug nanomedicines for cancer therapy’ by Renshuai Zhang et al., Nanoscale, 2023, 15, 17658–17697, https://doi.org/10.1039/D3NR04147F.
{"title":"Correction: Camptothecin-based prodrug nanomedicines for cancer therapy","authors":"Renshuai Zhang, Jing Yu, Zhu Guo, Hongfei Jiang, Chao Wang","doi":"10.1039/d4nr90241f","DOIUrl":"https://doi.org/10.1039/d4nr90241f","url":null,"abstract":"Correction for ‘Camptothecin-based prodrug nanomedicines for cancer therapy’ by Renshuai Zhang <em>et al.</em>, <em>Nanoscale</em>, 2023, <strong>15</strong>, 17658–17697, https://doi.org/10.1039/D3NR04147F.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"16 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142936987","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}
引用次数: 0
Chirality of Sub-nanometer Nanowires/Nanobelts
IF 6.7 3区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2025-01-09 DOI: 10.1039/d4nr05262e
Kaiyang Xing, Junfeng Hui, Simin Zhang
Chirality is a widespread phenomenon in the fields of nature and chemical, endow-ing compounds with distinc-tive chemical and biological characteristics. The conven-tional synthesis of chiral na-nomaterials relies on the introduction of chiral ligands or additives, environmental effects such as solvents and mechanical forces. Sub-nanometer nanowires (SNWs) and Sub-nanometer nanobelts (SNBs) are one-dimensional nanomaterials with high ani-sotropy, nearly 100% atomic exposure ratio and some other distinctive characteris-tics. In addition of traditional synthesis methods, the intrin-sic chirality of SNWs/SNBs can also be achieved by several methods such as construction of asymmetric defects and counterion exchange. Chiral SNWs/SNBs have wide appli-cation prospects in chiral catalysis, chiral optical devic-es, chiral drug delivery, chiral liquid crystal materials, chiral sensor and so on. In this work, we briefly introduce several examples of the origination, amplification, and transfer of the chirality in SNWs/SNBs. This review aims to deepen chirality researcher under-standing of the fundamental origins of intrinsic chirality in SNWs/SNBs, and lays the foundation for expanding their potential applications.
{"title":"Chirality of Sub-nanometer Nanowires/Nanobelts","authors":"Kaiyang Xing, Junfeng Hui, Simin Zhang","doi":"10.1039/d4nr05262e","DOIUrl":"https://doi.org/10.1039/d4nr05262e","url":null,"abstract":"Chirality is a widespread phenomenon in the fields of nature and chemical, endow-ing compounds with distinc-tive chemical and biological characteristics. The conven-tional synthesis of chiral na-nomaterials relies on the introduction of chiral ligands or additives, environmental effects such as solvents and mechanical forces. Sub-nanometer nanowires (SNWs) and Sub-nanometer nanobelts (SNBs) are one-dimensional nanomaterials with high ani-sotropy, nearly 100% atomic exposure ratio and some other distinctive characteris-tics. In addition of traditional synthesis methods, the intrin-sic chirality of SNWs/SNBs can also be achieved by several methods such as construction of asymmetric defects and counterion exchange. Chiral SNWs/SNBs have wide appli-cation prospects in chiral catalysis, chiral optical devic-es, chiral drug delivery, chiral liquid crystal materials, chiral sensor and so on. In this work, we briefly introduce several examples of the origination, amplification, and transfer of the chirality in SNWs/SNBs. This review aims to deepen chirality researcher under-standing of the fundamental origins of intrinsic chirality in SNWs/SNBs, and lays the foundation for expanding their potential applications.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"62 12 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142937036","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}
引用次数: 0
Construction of bimetallic oxy-hydroxides based on Ni(OH)2 nanosheets for sensitive non-enzymatic glucose detection via electrochemical oxidation and incorporation
IF 6.7 3区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2025-01-09 DOI: 10.1039/d4nr04342a
Weiji Dai, Bing Wu, Fan Zhang, Yuxi Huang, Cuijiao Zhao, Yudong Zhang, Can Cui, Jing Guo, Saifang Huang
Due to the ease of synthesis and large specific surface area, Ni(OH)2 nanosheets have emerged as promising electrochemical sensing materials, attracting significant attentions in recent years. Herein, a series of oxy-hydroxides based on Ni(OH)2 nanosheets, including NiOx/Ni(OH)2@NF and (MNi)Ox/Ni(OH)2@NF (M = Co, Fe, or Cr), are successfully synthesized via the electrochemical oxidation and incorporation strategies. Electrochemical tests demonstrate that these Ni(OH)2-based oxy-hydroxides exhibit excellent electrochemical oxidation activity for glucose in alkaline electrolyte. Among these, (CoNi)Ox/Ni(OH)2@NF displays higher sensitivity of 3590.3 μA mM-1 cm-2 across a broad linear range of 10 μM to 1.14 mM, with a rapid current response time of less than 4 s. The superior sensing performances of (CoNi)Ox/Ni(OH)2@NF are attributed to the formation of abundant Ni3+ species and reactive-O atoms due to the electrochemical oxidation, and the synergistic effects of Co/Ni active sites resulted from the electrochemical incorporation process. In addition, the (CoNi)Ox/Ni(OH)2@NF demonstrates good stability and reproducibility for glucose sensing. This work fully leverages the significance of surface reconstruction of Ni(OH)2, providing new insights for the application of transition metal-based oxy-hydroxides materials in bio-sensing.
{"title":"Construction of bimetallic oxy-hydroxides based on Ni(OH)2 nanosheets for sensitive non-enzymatic glucose detection via electrochemical oxidation and incorporation","authors":"Weiji Dai, Bing Wu, Fan Zhang, Yuxi Huang, Cuijiao Zhao, Yudong Zhang, Can Cui, Jing Guo, Saifang Huang","doi":"10.1039/d4nr04342a","DOIUrl":"https://doi.org/10.1039/d4nr04342a","url":null,"abstract":"Due to the ease of synthesis and large specific surface area, Ni(OH)2 nanosheets have emerged as promising electrochemical sensing materials, attracting significant attentions in recent years. Herein, a series of oxy-hydroxides based on Ni(OH)2 nanosheets, including NiOx/Ni(OH)2@NF and (MNi)Ox/Ni(OH)2@NF (M = Co, Fe, or Cr), are successfully synthesized via the electrochemical oxidation and incorporation strategies. Electrochemical tests demonstrate that these Ni(OH)2-based oxy-hydroxides exhibit excellent electrochemical oxidation activity for glucose in alkaline electrolyte. Among these, (CoNi)Ox/Ni(OH)2@NF displays higher sensitivity of 3590.3 μA mM-1 cm-2 across a broad linear range of 10 μM to 1.14 mM, with a rapid current response time of less than 4 s. The superior sensing performances of (CoNi)Ox/Ni(OH)2@NF are attributed to the formation of abundant Ni3+ species and reactive-O atoms due to the electrochemical oxidation, and the synergistic effects of Co/Ni active sites resulted from the electrochemical incorporation process. In addition, the (CoNi)Ox/Ni(OH)2@NF demonstrates good stability and reproducibility for glucose sensing. This work fully leverages the significance of surface reconstruction of Ni(OH)2, providing new insights for the application of transition metal-based oxy-hydroxides materials in bio-sensing.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"17 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142937436","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}
引用次数: 0
A straightforward process manipulates dramatic morphology change of DNA rolling circle amplification products
IF 6.7 3区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2025-01-09 DOI: 10.1039/d4nr04501g
Ling-Ling Zhang, Jiemin Zhao, Li Xu, Han Wang, Yining Yang, Han Zhang, Shuqi Fang, Yuchen Zhao, Tianjing Zhang, Xianzheng Zhang
Rolling circle amplification (RCA) is a widely used method for the synthesis of DNA nanoparticles and macro hydrogels. Several strategies, including oscillation-promoted entanglement of DNA chains, multi-round chain amplification, hybridization between DNA chains, and hybridization with functional moieties, are applied to synthesize DNA macro hydrogels; alternatively, flower-like nanoparticles are also produced. Here we report a straightforward yet effective method to manipulate the morphology of RCA products from nanoparticles to 3D hydrogels by an additional cold treatment step of the circular DNA template prior to elongation using phi29 DNA polymerase. This process induces a minor aggregation of the circular DNA template, significantly enhancing the entanglement of DNA chains in subsequent steps. Compared to contemporary synthesis methods for RCA-based macro hydrogels, our technique provides milder reaction conditions, shorter reaction time, and a more straightforward system. Notably, our method eliminates the need for oscillation during amplification and requires only a single round of RCA with a single type of circular DNA, thereby simplifying the synthesis process.
{"title":"A straightforward process manipulates dramatic morphology change of DNA rolling circle amplification products","authors":"Ling-Ling Zhang, Jiemin Zhao, Li Xu, Han Wang, Yining Yang, Han Zhang, Shuqi Fang, Yuchen Zhao, Tianjing Zhang, Xianzheng Zhang","doi":"10.1039/d4nr04501g","DOIUrl":"https://doi.org/10.1039/d4nr04501g","url":null,"abstract":"Rolling circle amplification (RCA) is a widely used method for the synthesis of DNA nanoparticles and macro hydrogels. Several strategies, including oscillation-promoted entanglement of DNA chains, multi-round chain amplification, hybridization between DNA chains, and hybridization with functional moieties, are applied to synthesize DNA macro hydrogels; alternatively, flower-like nanoparticles are also produced. Here we report a straightforward yet effective method to manipulate the morphology of RCA products from nanoparticles to 3D hydrogels by an additional cold treatment step of the circular DNA template prior to elongation using phi29 DNA polymerase. This process induces a minor aggregation of the circular DNA template, significantly enhancing the entanglement of DNA chains in subsequent steps. Compared to contemporary synthesis methods for RCA-based macro hydrogels, our technique provides milder reaction conditions, shorter reaction time, and a more straightforward system. Notably, our method eliminates the need for oscillation during amplification and requires only a single round of RCA with a single type of circular DNA, thereby simplifying the synthesis process.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"35 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142936989","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}
引用次数: 0
Improvement of adsorption of sulfadiazine on tannic acid-chitosan biochar by nickel doping through polyphenol metal network
IF 6.7 3区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2025-01-09 DOI: 10.1039/d4nr04987j
Zhuo Xu, Zhi Liang, Dingding Jiang, Xianwei Wang, Yuhao Wen, Gaosong Shao, Peiyuan Lu
Antibiotics, as a representative of new pollutants, have always been a difficulty in the water treatment process, and most adsorption materials do not have good adsorption capacity for antibiotics. Therefore, the adsorption capacity of materials for antibiotics was investigated using sulfadiazine (SDZ) as a representative of antibiotics. In this paper, nickel was successfully loaded onto the surface of chitosan by polyphenol metal network. The TAB-Ni was prepared by adding the appropriate amount of tannic acid-chitosan material to 0.03 mol/L nickel chloride under alkaline condition, and then calcined at a high temperature of 900℃ for 2 hours. The morphology and functional groups on the materials surface were determined by a series of characterization means, and the adsorption behavior of SDZ on TAB-Ni and the stability of the material were also evaluated. The results show that TAB-Ni has a strong adsorption capacity for SDZ, reaching 123.89 mg/g at 298k and 152.56 mg/g at 318K, exceeding the adsorption capacity of most carbon materials. Most importantly, the graphitization of nickel-doped biochar enhanced biochar in the adsorption mechanism dramatically improves the affinity (π-π interactions) between the aromatic structure and the benzene ring in the SDZ molecule and can provide metal-unsaturated sites to enhance the adsorption capacity for SDZ. The present study sheds light on the future enhanced adsorption of SDZ by carbon materials.
{"title":"Improvement of adsorption of sulfadiazine on tannic acid-chitosan biochar by nickel doping through polyphenol metal network","authors":"Zhuo Xu, Zhi Liang, Dingding Jiang, Xianwei Wang, Yuhao Wen, Gaosong Shao, Peiyuan Lu","doi":"10.1039/d4nr04987j","DOIUrl":"https://doi.org/10.1039/d4nr04987j","url":null,"abstract":"Antibiotics, as a representative of new pollutants, have always been a difficulty in the water treatment process, and most adsorption materials do not have good adsorption capacity for antibiotics. Therefore, the adsorption capacity of materials for antibiotics was investigated using sulfadiazine (SDZ) as a representative of antibiotics. In this paper, nickel was successfully loaded onto the surface of chitosan by polyphenol metal network. The TAB-Ni was prepared by adding the appropriate amount of tannic acid-chitosan material to 0.03 mol/L nickel chloride under alkaline condition, and then calcined at a high temperature of 900℃ for 2 hours. The morphology and functional groups on the materials surface were determined by a series of characterization means, and the adsorption behavior of SDZ on TAB-Ni and the stability of the material were also evaluated. The results show that TAB-Ni has a strong adsorption capacity for SDZ, reaching 123.89 mg/g at 298k and 152.56 mg/g at 318K, exceeding the adsorption capacity of most carbon materials. Most importantly, the graphitization of nickel-doped biochar enhanced biochar in the adsorption mechanism dramatically improves the affinity (π-π interactions) between the aromatic structure and the benzene ring in the SDZ molecule and can provide metal-unsaturated sites to enhance the adsorption capacity for SDZ. The present study sheds light on the future enhanced adsorption of SDZ by carbon materials.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"56 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142936986","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}
引用次数: 0
Ferroelectricity Enhanced Ion Migration in Hard Carbon Anode for High-performance Potassium Ion Batteries
IF 6.7 3区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2025-01-09 DOI: 10.1039/d4nr04916k
Li Rui, An Keyu, Ouyang Hao, Heng Li, Yanyan Zhang, Yuxin Tang, Jilei Liu, Shi Chen
Hard carbon is a promising candidate for potassium ion batteries due to its large interlayer spacing and abundant closed pores. However, the slow migration and sluggish diffusion kinetics of potassium ions lead to inferior insertion and pore filling processes, causing severe ion channel blocking, continuous byproduct generation, and poor cycling stability. In this study, we coated hard carbon on top of tetragonal barium titanate particles forming a ferroelectricity-aided anode (t-BTO@C). The spontaneous electrical field generated by t-BTO particles accelerated potassium ion kinetics. The rapid ion kinetics resulted in smaller oxidation potential and higher insertion-pore filling capacity. In addition, the t-BTO@C anode also shows much less byproduct generation. After 100 cycles at 0.05 A/g, the t-BTO@C anode shows a specific capacity of 374.9 mAh/g, higher than the SiO2@Carbon (97.2 mAh/g) and Pure Carbon (240.1 mAh/g). Paired with Prussian white cathode, the full cell shows a specific capacity of 313.0 mAh/g at 0.1 A/g, with 88.9% capacity retention after 40 cycles, much higher than recent reports. Our strategy provides new path to improve the performance of hard carbon anode in potassium ion batteries.
{"title":"Ferroelectricity Enhanced Ion Migration in Hard Carbon Anode for High-performance Potassium Ion Batteries","authors":"Li Rui, An Keyu, Ouyang Hao, Heng Li, Yanyan Zhang, Yuxin Tang, Jilei Liu, Shi Chen","doi":"10.1039/d4nr04916k","DOIUrl":"https://doi.org/10.1039/d4nr04916k","url":null,"abstract":"Hard carbon is a promising candidate for potassium ion batteries due to its large interlayer spacing and abundant closed pores. However, the slow migration and sluggish diffusion kinetics of potassium ions lead to inferior insertion and pore filling processes, causing severe ion channel blocking, continuous byproduct generation, and poor cycling stability. In this study, we coated hard carbon on top of tetragonal barium titanate particles forming a ferroelectricity-aided anode (t-BTO@C). The spontaneous electrical field generated by t-BTO particles accelerated potassium ion kinetics. The rapid ion kinetics resulted in smaller oxidation potential and higher insertion-pore filling capacity. In addition, the t-BTO@C anode also shows much less byproduct generation. After 100 cycles at 0.05 A/g, the t-BTO@C anode shows a specific capacity of 374.9 mAh/g, higher than the SiO2@Carbon (97.2 mAh/g) and Pure Carbon (240.1 mAh/g). Paired with Prussian white cathode, the full cell shows a specific capacity of 313.0 mAh/g at 0.1 A/g, with 88.9% capacity retention after 40 cycles, much higher than recent reports. Our strategy provides new path to improve the performance of hard carbon anode in potassium ion batteries.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"101 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142936990","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}
引用次数: 0
Broadband and large surface enhancements of local electric field enabled by cross-etched hyperbolic metamaterials
IF 6.7 3区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2025-01-09 DOI: 10.1039/d4nr04039b
Zixian Li, Houjiao Zhang, Zhonghong Shi, Haoyang Li, Guoli He, Shuang Qiu, Zhang-kai Zhou
The hyperbolic metamaterials (HMMs) have gained great research efforts, because of their hyperbolic wavevector iso-frequency contour character which leads to great local electric field (EF) enhancements benefiting for boosting optical processes and applications, such as the nonlinear generation, quantum science, biomedical sensing, etc. However, there are mainly three problems of HMMs preventing their practical implementations, which are the difficulty in exciting their resonant modes using free-space incidence, the weak enhancement of surface EF, and the narrow spectral range of EF enhancements. Herein, we propose a kind of new HMMs, which is the cross-etched HMMs (CeHMMs). The CeHMMs can be facially obtained by etching periodic cross-shape arrays in the normal HMMs, and exhibit two resonant high-k modes within the spectral range of 700-1100 nm under the linearly, circularly, or elliptically polarized incident lights from the free space. Also, it is calculated that the CeHMMs can provide large surface EF enhancement in a broadband spectral range (over 500 nm). After integrating the single layered WSe2 onto the top surface, the photoluminescence (PL) enhancements of the CeHMMs and their hot spots based on the emission resonance, are calculated to be 9.72 and 62 times, respectively. With the ability of broadband surface EF enhancement, it is believed the CeHMMs can offer considerable potentials for a variety of nanophotonic applications, including nonlinear optics, integrated optics, and quantum photonics.
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引用次数: 0
Electrocatalytic reduction of CO2 to produce the C2+ products: from selectivity to rational catalyst design
IF 6.7 3区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2025-01-08 DOI: 10.1039/d4nr04159c
Xu-dong Shi, Rui-Tang Guo, Heng-fei Cui, Cong Liu, Wei-Guo Pan
Electrocatalytic reduction of CO2 (eCO2RR) into valuable multi-carbon (C2+) products is an effective strategy for combating climate change and mitigating energy crises. The high energy density and diverse applications of C2+ products have attracted considerable interest. However, the complexity of the reaction pathways and the high energy barriers to C-C coupling leads to lower selectivity and Faradaic efficiency for C2+ products than for C1 products. Therefore, a thorough understanding of the underlying mechanisms and identification of reaction conditions that influence selectivity, followed by the rational design of catalysts, are considered promising methods for the efficient and selective synthesis of multi-carbon products. This review first introduces the critical steps involved in forming multi-carbon products. Then, we discuss the reaction conditions that influence the selectivity of C2+ products and explore different catalyst design strategies to enhance the selective production of C2+ products. Finally, we summarize the significant challenges currently facing the eCO2RR field and suggest future research directions to address these challenges.
{"title":"Electrocatalytic reduction of CO2 to produce the C2+ products: from selectivity to rational catalyst design","authors":"Xu-dong Shi, Rui-Tang Guo, Heng-fei Cui, Cong Liu, Wei-Guo Pan","doi":"10.1039/d4nr04159c","DOIUrl":"https://doi.org/10.1039/d4nr04159c","url":null,"abstract":"Electrocatalytic reduction of CO2 (eCO2RR) into valuable multi-carbon (C2+) products is an effective strategy for combating climate change and mitigating energy crises. The high energy density and diverse applications of C2+ products have attracted considerable interest. However, the complexity of the reaction pathways and the high energy barriers to C-C coupling leads to lower selectivity and Faradaic efficiency for C2+ products than for C1 products. Therefore, a thorough understanding of the underlying mechanisms and identification of reaction conditions that influence selectivity, followed by the rational design of catalysts, are considered promising methods for the efficient and selective synthesis of multi-carbon products. This review first introduces the critical steps involved in forming multi-carbon products. Then, we discuss the reaction conditions that influence the selectivity of C2+ products and explore different catalyst design strategies to enhance the selective production of C2+ products. Finally, we summarize the significant challenges currently facing the eCO2RR field and suggest future research directions to address these challenges.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"16 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142936402","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}
引用次数: 0
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Nanoscale
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