Pub Date : 2025-04-01DOI: 10.1016/j.nanoms.2024.04.012
Huajie Wang , Hao Peng , Wenhao Ji , Jiaxin Wang , Xiaoyan Du , Wen Song , Wen Zhang , Fazli Wahid , Ali Raza
Face masks play a pivotal role in preventing infection transmission. However, the capture of infection-sourced particles in face masks poses challenges related to reuse, necessitating proper disposal. We developed a self-sterilizable polypropylene-based membrane for face masks to address challenges associated with infection transmission prevention. The membrane, created using 3D printing, underwent functionalization with zinc oxide (ZnO) and polydopamine (PDA)-TEMPO to achieve broad-spectrum light absorption and facilitate self-sterilization through photocatalytic and photothermal effects upon light exposure. The hydrophobic surface (water contact angle: 133 ± 2°) minimized moisture accumulation, and the membrane exhibited robust mechanical properties, including shear strength (1.25 ± 0.5 kPa) and peel resistance strength (112.8 ± 11.2 kPa). The evaluation demonstrated stability in airflow (0–500 cm3/s) and excellent aerosol filtration efficiency (94.8 ± 0.6 %) for particles (PM 0.3, PM 2.5, PM 10), comparable to commercial masks. The membrane showed antibacterial efficacy over five uses in a simulated respiratory environment. Safety assessments confirmed biocompatibility through cytocompatibility and skin irritation assays. In conclusion, this membrane offers efficient filtration and photo-triggered sterilization, presenting a promising solution for next-generation face masks to address concerns related to reuse, disposal, and infection control.
{"title":"Photo-responsive polypropylene/zinc oxide/polydopamine-TEMPO composite membranes with light-induced self-sterilization","authors":"Huajie Wang , Hao Peng , Wenhao Ji , Jiaxin Wang , Xiaoyan Du , Wen Song , Wen Zhang , Fazli Wahid , Ali Raza","doi":"10.1016/j.nanoms.2024.04.012","DOIUrl":"10.1016/j.nanoms.2024.04.012","url":null,"abstract":"<div><div>Face masks play a pivotal role in preventing infection transmission. However, the capture of infection-sourced particles in face masks poses challenges related to reuse, necessitating proper disposal. We developed a self-sterilizable polypropylene-based membrane for face masks to address challenges associated with infection transmission prevention. The membrane, created using 3D printing, underwent functionalization with zinc oxide (ZnO) and polydopamine (PDA)-TEMPO to achieve broad-spectrum light absorption and facilitate self-sterilization through photocatalytic and photothermal effects upon light exposure. The hydrophobic surface (water contact angle: 133 ± 2°) minimized moisture accumulation, and the membrane exhibited robust mechanical properties, including shear strength (1.25 ± 0.5 kPa) and peel resistance strength (112.8 ± 11.2 kPa). The evaluation demonstrated stability in airflow (0–500 cm<sup>3</sup>/s) and excellent aerosol filtration efficiency (94.8 ± 0.6 %) for particles (PM 0.3, PM 2.5, PM 10), comparable to commercial masks. The membrane showed antibacterial efficacy over five uses in a simulated respiratory environment. Safety assessments confirmed biocompatibility through cytocompatibility and skin irritation assays. In conclusion, this membrane offers efficient filtration and photo-triggered sterilization, presenting a promising solution for next-generation face masks to address concerns related to reuse, disposal, and infection control.</div></div>","PeriodicalId":33573,"journal":{"name":"Nano Materials Science","volume":"7 2","pages":"Pages 276-288"},"PeriodicalIF":9.9,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144099827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-04-01DOI: 10.1016/j.nanoms.2025.02.001
Xin-Quan Tan , Grayson Zhi Sheng Ling , Tan Ji Siang , Xianhai Zeng , Abdul Rahman Mohamed , Wee-Jun Ong
Despite advances in photocatalytic half-reduction reactions, challenges remain in effectively utilizing electron-hole pairs in concurrent redox processes. The present study involved the construction of a p-n junction Co3O4/Zn3In2S6 (CoZ) hybrid with a complementary band edge potential. The photocatalyst formed by the 2D assembled-nanostructure portrayed an optimal yield of 13.8 (H2) and 13.1 (benzaldehyde) mmol g−1 h−1 when exposed to light (λ > 420 nm), surpassing 1 % Pt-added ZIS (12.4 (H2) and 10.71 (benzaldehyde) mmol g−1 h−1). Around 95 % of the electron-hole utilization rate was achieved. The solar-to-hydrogen (STH) and apparent quantum yield (AQY) values of 0.466 % and 4.96 % (420 nm) achieved by this system in the absence of sacrificial agents exceeded those of previous works. The exceptional performance was mostly ascribed to the synergistic development of adjoining p-n heterojunctions and the built-in electric field for effective charge separation. Moreover, scavenger studies elucidated the intricate mechanistic enigma of the dual-redox process, in which benzaldehyde was produced via O-H activation and subsequent C-H cleavage of benzyl alcohol over CoZ hybrids. Furthermore, the widespread use of the optimal 1-CoZ composites was confirmed in multiple photoredox systems. This work presents an innovative perspective on the construction of dual-functioning p-n heterojunctions for practical photoredox applications.
{"title":"Elevating dual-redox photocatalysis with p-n junction: Hydrangea-like Zn3In2S6 nanoflowers coupled hexagonal Co3O4 for cooperative hydrogen and benzaldehyde production","authors":"Xin-Quan Tan , Grayson Zhi Sheng Ling , Tan Ji Siang , Xianhai Zeng , Abdul Rahman Mohamed , Wee-Jun Ong","doi":"10.1016/j.nanoms.2025.02.001","DOIUrl":"10.1016/j.nanoms.2025.02.001","url":null,"abstract":"<div><div>Despite advances in photocatalytic half-reduction reactions, challenges remain in effectively utilizing electron-hole pairs in concurrent redox processes. The present study involved the construction of a p-n junction Co<sub>3</sub>O<sub>4</sub>/Zn<sub>3</sub>In<sub>2</sub>S<sub>6</sub> (CoZ) hybrid with a complementary band edge potential. The photocatalyst formed by the 2D assembled-nanostructure portrayed an optimal yield of 13.8 (H<sub>2</sub>) and 13.1 (benzaldehyde) mmol g<sup>−1</sup> h<sup>−1</sup> when exposed to light (<em>λ</em> > 420 nm), surpassing 1 % Pt-added ZIS (12.4 (H<sub>2</sub>) and 10.71 (benzaldehyde) mmol g<sup>−1</sup> h<sup>−1</sup>). Around 95 % of the electron-hole utilization rate was achieved. The solar-to-hydrogen (STH) and apparent quantum yield (AQY) values of 0.466 % and 4.96 % (420 nm) achieved by this system in the absence of sacrificial agents exceeded those of previous works. The exceptional performance was mostly ascribed to the synergistic development of adjoining p-n heterojunctions and the built-in electric field for effective charge separation. Moreover, scavenger studies elucidated the intricate mechanistic enigma of the dual-redox process, in which benzaldehyde was produced via O-H activation and subsequent C-H cleavage of benzyl alcohol over CoZ hybrids. Furthermore, the widespread use of the optimal 1-CoZ composites was confirmed in multiple photoredox systems. This work presents an innovative perspective on the construction of dual-functioning p-n heterojunctions for practical photoredox applications.</div></div>","PeriodicalId":33573,"journal":{"name":"Nano Materials Science","volume":"7 2","pages":"Pages 169-179"},"PeriodicalIF":9.9,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144099785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-04-01DOI: 10.1016/j.nanoms.2024.04.001
Selvaraj Mohana Roopan , Thangapandi Chellapandi , Roshan Mohammed Shebeer , E. Akhil , Jerry D. Alappat , Nived Rajeshkumar Nair , Manasa Madhusoodanan , D. Chitra
Human society is currently facing significant and pressing issues in the form of serious environmental pollution and energy shortages, which have arisen owing to the rapid development of the economy and contemporary industry. Photocatalysis has considerable potential as a viable technique for providing sustainable and environmentally friendly energy sources. The use of lanthanide-based photocatalysts on supporting substrates has garnered significant attention over the past decade within the scope of organic pollution remediation. Owing to its unique and promising bandgap, electrical conductivity, and stability, traditional GdVO4 exhibits remarkable photocatalytic performance with ongoing advances and advancements. This review provides an overview of the latest advancements in the modification techniques employed for GdVO4-based photocatalysts, with a specific focus on their application in the photocatalytic degradation of organic pollutants. The supplied information provides a concise overview of current obstacles, limitations, advancements, mechanisms, and potential prospects for new opportunities. This review is anticipated to provide a significant reference and scientific justification for the active development of GdVO4-based materials for environmental applications.
{"title":"Advances and prospects in the development of GdVO4-based photocatalysts for water pollutants removal activity: A review","authors":"Selvaraj Mohana Roopan , Thangapandi Chellapandi , Roshan Mohammed Shebeer , E. Akhil , Jerry D. Alappat , Nived Rajeshkumar Nair , Manasa Madhusoodanan , D. Chitra","doi":"10.1016/j.nanoms.2024.04.001","DOIUrl":"10.1016/j.nanoms.2024.04.001","url":null,"abstract":"<div><div>Human society is currently facing significant and pressing issues in the form of serious environmental pollution and energy shortages, which have arisen owing to the rapid development of the economy and contemporary industry. Photocatalysis has considerable potential as a viable technique for providing sustainable and environmentally friendly energy sources. The use of lanthanide-based photocatalysts on supporting substrates has garnered significant attention over the past decade within the scope of organic pollution remediation. Owing to its unique and promising bandgap, electrical conductivity, and stability, traditional GdVO<sub>4</sub> exhibits remarkable photocatalytic performance with ongoing advances and advancements. This review provides an overview of the latest advancements in the modification techniques employed for GdVO<sub>4</sub>-based photocatalysts, with a specific focus on their application in the photocatalytic degradation of organic pollutants. The supplied information provides a concise overview of current obstacles, limitations, advancements, mechanisms, and potential prospects for new opportunities. This review is anticipated to provide a significant reference and scientific justification for the active development of GdVO<sub>4</sub>-based materials for environmental applications.</div></div>","PeriodicalId":33573,"journal":{"name":"Nano Materials Science","volume":"7 2","pages":"Pages 180-197"},"PeriodicalIF":9.9,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140768198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-04-01DOI: 10.1016/j.nanoms.2024.03.001
Yue Zhu , Yalong Liao , Meng Wang , Jingxin Dai , Chaoshuai Lei , Xiaobo Liu , Pengyu Mu , Wenjing Li , Hao Zhang
Graphene nanosheets have attracted great attention in the field of nanotechnology applications due to their extraordinary mechanical properties. While the structural defects such as gaps will occur during the preparation of graphene laminates, which will greatly damage the performance of the macroscopic material. Hence, a simple and promising mechanical compression method is used to improve the mechanical properties of graphene laminates. However, the roles of the densification process in the mechanical enhancement mechanism of graphene laminates are not clear. In our work, the mechanical enhancement of the compressed graphene (PG) laminates was investigated by the coarse-grained molecular dynamics simulation method. The tensile strength of PG model could be increased by increasing the graphene nanosheet size and the degree of compression in the system. And the model has the stronger van der Waals effect between graphene sheets due to the larger graphene size as well as the higher overlap ratio. Furthermore, two kinds of PG laminates were prepared by densification method, and the tensile strength was consistent with the upward trend of the PG model. This work provides an in-depth understanding on the mechanical enhancement of the densification process and lays a foundation for the future practical application of graphene laminates.
{"title":"Effect of densification process on mechanical enhancement of graphene laminates","authors":"Yue Zhu , Yalong Liao , Meng Wang , Jingxin Dai , Chaoshuai Lei , Xiaobo Liu , Pengyu Mu , Wenjing Li , Hao Zhang","doi":"10.1016/j.nanoms.2024.03.001","DOIUrl":"10.1016/j.nanoms.2024.03.001","url":null,"abstract":"<div><div>Graphene nanosheets have attracted great attention in the field of nanotechnology applications due to their extraordinary mechanical properties. While the structural defects such as gaps will occur during the preparation of graphene laminates, which will greatly damage the performance of the macroscopic material. Hence, a simple and promising mechanical compression method is used to improve the mechanical properties of graphene laminates. However, the roles of the densification process in the mechanical enhancement mechanism of graphene laminates are not clear. In our work, the mechanical enhancement of the compressed graphene (PG) laminates was investigated by the coarse-grained molecular dynamics simulation method. The tensile strength of PG model could be increased by increasing the graphene nanosheet size and the degree of compression in the system. And the model has the stronger van der Waals effect between graphene sheets due to the larger graphene size as well as the higher overlap ratio. Furthermore, two kinds of PG laminates were prepared by densification method, and the tensile strength was consistent with the upward trend of the PG model. This work provides an in-depth understanding on the mechanical enhancement of the densification process and lays a foundation for the future practical application of graphene laminates.</div></div>","PeriodicalId":33573,"journal":{"name":"Nano Materials Science","volume":"7 2","pages":"Pages 240-248"},"PeriodicalIF":9.9,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140760290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-04-01DOI: 10.1016/j.nanoms.2024.04.006
Jinfei Zhou , Yujiao Wang , Binbin Lu , Jia Lyu , Nini Wei , Jianfeng Huang , Lingmei Liu , Xiao Li , Xinghua Li , Daliang Zhang
Nanocrystals have emerged as cutting-edge functional materials benefiting from the increased surface and enhanced coupling of electronic states. High-resolution imaging in transmission electron microscope can provide invaluable structural information of crystalline materials, albeit it remains greatly challenging to nanocrystals due to the arduousness of accurate zone axis adjustment. Herein, a homemade software package, called SmartAxis, is developed for rapid yet accurate zone axis alignment of nanocrystals. Incident electron beam tilt is employed as an eccentric goniometer to measure the angular deviation of a crystal to a zone axis, and then serves as a linkage to calculate the α and β tilts of goniometer based on an accurate quantitative relationship. In this way, high-resolution imaging of one identical small Au nanocrystal, as well as electron beam-sensitive MIL-101 metal-organic framework crystals, along multiple zone axes, was performed successfully by using this accurate, time- and electron dose-saving zone axis alignment software package.
{"title":"SmartAxis, a software for accurate and rapid zone axis alignment of nanocrystalline materials","authors":"Jinfei Zhou , Yujiao Wang , Binbin Lu , Jia Lyu , Nini Wei , Jianfeng Huang , Lingmei Liu , Xiao Li , Xinghua Li , Daliang Zhang","doi":"10.1016/j.nanoms.2024.04.006","DOIUrl":"10.1016/j.nanoms.2024.04.006","url":null,"abstract":"<div><div>Nanocrystals have emerged as cutting-edge functional materials benefiting from the increased surface and enhanced coupling of electronic states. High-resolution imaging in transmission electron microscope can provide invaluable structural information of crystalline materials, albeit it remains greatly challenging to nanocrystals due to the arduousness of accurate zone axis adjustment. Herein, a homemade software package, called SmartAxis, is developed for rapid yet accurate zone axis alignment of nanocrystals. Incident electron beam tilt is employed as an eccentric goniometer to measure the angular deviation of a crystal to a zone axis, and then serves as a linkage to calculate the <em>α</em> and <em>β</em> tilts of goniometer based on an accurate quantitative relationship. In this way, high-resolution imaging of one identical small Au nanocrystal, as well as electron beam-sensitive MIL-101 metal-organic framework crystals, along multiple zone axes, was performed successfully by using this accurate, time- and electron dose-saving zone axis alignment software package.</div></div>","PeriodicalId":33573,"journal":{"name":"Nano Materials Science","volume":"7 2","pages":"Pages 297-303"},"PeriodicalIF":9.9,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141039649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-04-01DOI: 10.1016/j.nanoms.2024.04.002
Tengfei Bao , Xuejing Li , Shuming Li , Heng Rao , Xiaoju Men , Ping She , Junsheng Qin
Photocatalytic solar energy conversion has drawn increasing attention, which holds great potential to deal with the energy crisis and environmental issues. As a typical semiconductor photocatalyst, graphite nitrogen carbon (g-C3N4) has been widely utilized owing to its nontoxicity and easy preparation properties. However, pristine g-C3N4 also faces the limitations of unsatisfactory light absorption, few active sites, and a rapid combination of photo-induced charge. To further optimize the photochemical catalytic performance of g-C3N4, tremendous efforts were devoted to modifying g-C3N4, including morphological regulation, element doping, and heterogeneous engineering. Some considerable progress has been achieved in g-C3N4-based photocatalytic hydrogen generation (PHE) from water splitting, photocatalytic carbon dioxide reduction (PCR), photocatalytic nitrogen reduction (PNR), photocatalytic removal of pollutants, and photocatalytic bacteria elimination. However, a frontier and comprehensive summary of g-C3N4-based photocatalysis is rarely reported. Herein, we provide an all-inclusive and updated investigation of the recent advances in modification methods of g-C3N4 and photocatalytic reactions based on g-C3N4 in the past five years. This conclusive remark may provide a new physical insight into the development of g-C3N4-based solar energy conversion.
{"title":"Recent advances of graphitic carbon nitride (g-C3N4) based materials for photocatalytic applications: A review","authors":"Tengfei Bao , Xuejing Li , Shuming Li , Heng Rao , Xiaoju Men , Ping She , Junsheng Qin","doi":"10.1016/j.nanoms.2024.04.002","DOIUrl":"10.1016/j.nanoms.2024.04.002","url":null,"abstract":"<div><div>Photocatalytic solar energy conversion has drawn increasing attention, which holds great potential to deal with the energy crisis and environmental issues. As a typical semiconductor photocatalyst, graphite nitrogen carbon (<em>g</em>-C<sub>3</sub>N<sub>4</sub>) has been widely utilized owing to its nontoxicity and easy preparation properties. However, pristine <em>g</em>-C<sub>3</sub>N<sub>4</sub> also faces the limitations of unsatisfactory light absorption, few active sites, and a rapid combination of photo-induced charge. To further optimize the photochemical catalytic performance of <em>g</em>-C<sub>3</sub>N<sub>4</sub>, tremendous efforts were devoted to modifying <em>g</em>-C<sub>3</sub>N<sub>4</sub>, including morphological regulation, element doping, and heterogeneous engineering. Some considerable progress has been achieved in <em>g</em>-C<sub>3</sub>N<sub>4</sub>-based photocatalytic hydrogen generation (PHE) from water splitting, photocatalytic carbon dioxide reduction (PCR), photocatalytic nitrogen reduction (PNR), photocatalytic removal of pollutants, and photocatalytic bacteria elimination. However, a frontier and comprehensive summary of <em>g</em>-C<sub>3</sub>N<sub>4</sub>-based photocatalysis is rarely reported. Herein, we provide an all-inclusive and updated investigation of the recent advances in modification methods of <em>g</em>-C<sub>3</sub>N<sub>4</sub> and photocatalytic reactions based on <em>g</em>-C<sub>3</sub>N<sub>4</sub> in the past five years. This conclusive remark may provide a new physical insight into the development of <em>g</em>-C<sub>3</sub>N<sub>4</sub>-based solar energy conversion.</div></div>","PeriodicalId":33573,"journal":{"name":"Nano Materials Science","volume":"7 2","pages":"Pages 145-168"},"PeriodicalIF":9.9,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140759047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-04-01DOI: 10.1016/j.nanoms.2024.04.010
Jinshu Li , Bo Wang , DaWei He , Yongsheng Wang , Euyheon Hwang , Yajie Yang
The transport properties of two-dimensional (2D) molybdenum diselenide (MoSe2) were comprehensively investigated. To understand experimental data, a detailed transport theory was developed by considering charged impurity, acoustic phonon, and optical phonon scatterings, and excellent quantitative agreements were obtained between theory and experiment. The observed metal-insulator transition (MIT) in MoSe2 is attributed to the screened Coulombic disorder arising from the random distribution of charged impurities in the semiconductor structures, indicating that MoSe2 2D MIT is a finite-temperature density-inhomogeneity-driven effective transition. We argue that the critical carrier density (nc) is sensitive to impurity density (ni) as a result of the competition with intrinsic phonons. Due to low impurity density, our devices show linear ohmic contact between the channel and electrodes. Furthermore, high performance MoSe2 all-2D photodetectors are fabricated by using a transparent electrode on a hexagonal boron nitride (hBN) substrate. The fabricated all-2D MoSe2 photodetectors demonstrate a substantial enhancement of photocurrent due to multiple reflections at the hBN and MoSe2 interface. Additionally, they exhibit a high photo-to-dark current ratio (1.1 × 104), high responsivity (3500 A/W), and high detectivity (5.8 × 1010 Jones).
全面研究了二维二硒化钼（MoSe2）的输运性质。为了更好地理解实验数据，我们考虑了带电杂质、声子散射和光声子散射，建立了详细的输运理论，并在理论和实验之间获得了很好的定量一致性。在MoSe2中观察到的金属-绝缘体转变（MIT）归因于半导体结构中带电杂质随机分布所导致的屏蔽库仑无序，表明MoSe2 2D的MIT是一个有限温度密度非均匀驱动的有效转变。我们认为临界载流子密度（nc）对杂质密度（ni）很敏感，这是由于与本禀声子的竞争。由于低杂质密度，我们的器件在通道和电极之间显示线性欧姆接触。此外，在六方氮化硼（hBN）衬底上使用透明电极制备了高性能MoSe2全2d光电探测器。制备的全2d MoSe2光电探测器由于在hBN和MoSe2界面处的多次反射而显示出光电流的显著增强。此外，它们还具有高光暗电流比（1.1 × 104）、高响应性（3500 a /W）和高探测性（5.8 × 1010 Jones）。
{"title":"Transport properties of two-dimensional MoSe2 and its application to high-performing all-2D photodetector","authors":"Jinshu Li , Bo Wang , DaWei He , Yongsheng Wang , Euyheon Hwang , Yajie Yang","doi":"10.1016/j.nanoms.2024.04.010","DOIUrl":"10.1016/j.nanoms.2024.04.010","url":null,"abstract":"<div><div>The transport properties of two-dimensional (2D) molybdenum diselenide (MoSe<sub>2</sub>) were comprehensively investigated. To understand experimental data, a detailed transport theory was developed by considering charged impurity, acoustic phonon, and optical phonon scatterings, and excellent quantitative agreements were obtained between theory and experiment. The observed metal-insulator transition (MIT) in MoSe<sub>2</sub> is attributed to the screened Coulombic disorder arising from the random distribution of charged impurities in the semiconductor structures, indicating that MoSe<sub>2</sub> 2D MIT is a finite-temperature density-inhomogeneity-driven effective transition. We argue that the critical carrier density (<em>n</em><sub><em>c</em></sub>) is sensitive to impurity density (n<sub>i</sub>) as a result of the competition with intrinsic phonons. Due to low impurity density, our devices show linear ohmic contact between the channel and electrodes. Furthermore, high performance MoSe<sub>2</sub> all-2D photodetectors are fabricated by using a transparent electrode on a hexagonal boron nitride (hBN) substrate. The fabricated all-2D MoSe<sub>2</sub> photodetectors demonstrate a substantial enhancement of photocurrent due to multiple reflections at the hBN and MoSe<sub>2</sub> interface. Additionally, they exhibit a high photo-to-dark current ratio (1.1 × 10<sup>4</sup>), high responsivity (3500 A/W), and high detectivity (5.8 × 10<sup>10</sup> Jones).</div></div>","PeriodicalId":33573,"journal":{"name":"Nano Materials Science","volume":"7 2","pages":"Pages 289-296"},"PeriodicalIF":9.9,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144099828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-03-04DOI: 10.1016/j.nanoms.2024.08.008
Hamid Ali , Obaid Iqbal , Muhammad Sadiq , Yumeng Cheng , Xiao Yan , Basem Al Alwan , Atef El Jery , Hameed ur Rahman , Yongteng Qian , Asif Hayat , Dewu Yue , Zeeshan Ajmal
Conjugated microporous polymers (CMPs) are a unique class of organic porous materials characterized by π-conjugated structures and permanent micropores, distinguishing them from non-porous polymers and conventional π-conjugated polymers. CMPs offer extensive versatility in synthetic approaches, enabling the synthesis of cross-linked and mesoporous structures. Advances in chemical processes, structural design, and synthesis methodologies have been developed, resulting in a diverse range of CMPs with unique configurations and properties, contributing to the fast expansion of the field. CMPs are particularly notable for their ability to enable the competitive utilization of π-conjugated structures within mesoporous configurations, making them valuable for investigations across various domains. They have shown considerable promise in addressing fuel and environmental challenges, demonstrated by their exceptional performance in applications such as vapor adsorption, heterogeneous catalysis, light emission, light harvesting, and energy generation. This review examines the chemical engineering principles underlying CMPs, including synthesis approaches, systemic research advancements, multifunctional investigations boundaries, potential applications, and progress in synthesis, dimensionality, and morphology studies. Specifically, it offers a comparative analysis of CMPs and linear polymeric materials, aiding in the development of functional polymers. Furthermore, this review explores the primary fundamental limitations of CMPs in fuel-related domains and discusses alternative strategies, including novel synthesis methods incorporating interactions and morphologies, to address these challenges. Ultimately, this assessment aims to provide a valuable and inspiring resource for professionals in the field of fuel management, guiding future research and development efforts.
{"title":"Novel advancements in synthesis, modulation, and potential applications of conjugated microporous polymer-based materials","authors":"Hamid Ali , Obaid Iqbal , Muhammad Sadiq , Yumeng Cheng , Xiao Yan , Basem Al Alwan , Atef El Jery , Hameed ur Rahman , Yongteng Qian , Asif Hayat , Dewu Yue , Zeeshan Ajmal","doi":"10.1016/j.nanoms.2024.08.008","DOIUrl":"10.1016/j.nanoms.2024.08.008","url":null,"abstract":"<div><div>Conjugated microporous polymers (CMPs) are a unique class of organic porous materials characterized by π-conjugated structures and permanent micropores, distinguishing them from non-porous polymers and conventional π-conjugated polymers. CMPs offer extensive versatility in synthetic approaches, enabling the synthesis of cross-linked and mesoporous structures. Advances in chemical processes, structural design, and synthesis methodologies have been developed, resulting in a diverse range of CMPs with unique configurations and properties, contributing to the fast expansion of the field. CMPs are particularly notable for their ability to enable the competitive utilization of π-conjugated structures within mesoporous configurations, making them valuable for investigations across various domains. They have shown considerable promise in addressing fuel and environmental challenges, demonstrated by their exceptional performance in applications such as vapor adsorption, heterogeneous catalysis, light emission, light harvesting, and energy generation. This review examines the chemical engineering principles underlying CMPs, including synthesis approaches, systemic research advancements, multifunctional investigations boundaries, potential applications, and progress in synthesis, dimensionality, and morphology studies. Specifically, it offers a comparative analysis of CMPs and linear polymeric materials, aiding in the development of functional polymers. Furthermore, this review explores the primary fundamental limitations of CMPs in fuel-related domains and discusses alternative strategies, including novel synthesis methods incorporating interactions and morphologies, to address these challenges. Ultimately, this assessment aims to provide a valuable and inspiring resource for professionals in the field of fuel management, guiding future research and development efforts.</div></div>","PeriodicalId":33573,"journal":{"name":"Nano Materials Science","volume":"8 1","pages":"Pages 117-174"},"PeriodicalIF":17.9,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146057501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-02-17DOI: 10.1016/j.nanoms.2024.12.003
Hao Wu , Rui Liu , Donghui Li , Yun Hau Ng
Photocatalytic carbon dioxide reduction reaction (CO2RR) is a carbon-neutral strategy to address global energy use and its impact on climate. Metal oxide and metal chalcogenide catalysts are the most investigated catalysts for photocatalytic CO2RR. Unfortunately, low CO2 adsorption ability and limited active sites of metal oxide and metal chalcogenide catalysts for CO2RR make them less competitive compared to their industrial counterparts. Inspired by applications of porphyrin-based metal-organic framework (MOF) catalysts for hydrogen evolution and photodynamic therapy, the investigations of these porphyrin-based MOFs, including pristine and composite porphyrin-based MOFs in photocatalytic CO2RR, have attracted significant attention in the last five years due to their excellent CO2 adsorption capacities, high porosity, high stability, exceptional optoelectronic properties, and multi-functionality. However, due to the difference in photocatalytic CO2RR, several critical issues need to be addressed to achieve the rational design of advanced porphyrin-based MOF photocatalysts to improve activity, selectivity, and stability for CO2RR. Here, we review recent developments in the field of porphyrin-based MOF CO2RR photocatalysts, along with critical issues, challenges, and perspectives concerning porphyrin-based MOF catalysts for photocatalytic CO2RR.
{"title":"Porphyrin-based metal-organic frameworks for photocatalytic carbon dioxide reduction: Current understanding and challenges","authors":"Hao Wu , Rui Liu , Donghui Li , Yun Hau Ng","doi":"10.1016/j.nanoms.2024.12.003","DOIUrl":"10.1016/j.nanoms.2024.12.003","url":null,"abstract":"<div><div>Photocatalytic carbon dioxide reduction reaction (CO<sub>2</sub>RR) is a carbon-neutral strategy to address global energy use and its impact on climate. Metal oxide and metal chalcogenide catalysts are the most investigated catalysts for photocatalytic CO<sub>2</sub>RR. Unfortunately, low CO<sub>2</sub> adsorption ability and limited active sites of metal oxide and metal chalcogenide catalysts for CO<sub>2</sub>RR make them less competitive compared to their industrial counterparts. Inspired by applications of porphyrin-based metal-organic framework (MOF) catalysts for hydrogen evolution and photodynamic therapy, the investigations of these porphyrin-based MOFs, including pristine and composite porphyrin-based MOFs in photocatalytic CO<sub>2</sub>RR, have attracted significant attention in the last five years due to their excellent CO<sub>2</sub> adsorption capacities, high porosity, high stability, exceptional optoelectronic properties, and multi-functionality. However, due to the difference in photocatalytic CO<sub>2</sub>RR, several critical issues need to be addressed to achieve the rational design of advanced porphyrin-based MOF photocatalysts to improve activity, selectivity, and stability for CO<sub>2</sub>RR. Here, we review recent developments in the field of porphyrin-based MOF CO<sub>2</sub>RR photocatalysts, along with critical issues, challenges, and perspectives concerning porphyrin-based MOF catalysts for photocatalytic CO<sub>2</sub>RR.</div></div>","PeriodicalId":33573,"journal":{"name":"Nano Materials Science","volume":"8 1","pages":"Pages 183-206"},"PeriodicalIF":17.9,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146057503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 : 2025-02-01DOI: 10.1016/j.nanoms.2024.03.002
Xiangwei Liu , Tiedong Sun , Yuan Sun , Alina Manshina , Lei Wang
Nanozymes, as a new generation of artificial enzymes, exhibit similar chemical properties, catalytic efficiency, and reaction kinetics to natural enzymes. Nanozymes can offer several advantages over natural enzymes, including the decreased cost, the increased stability, and the enhanced catalytic activity. These advantages have positioned nanozymes as a research focus in the fields of chemistry, materials and biomedicine. Polyoxometalates (POMs) and their composites have been found to possess excellent catalytic capabilities as peroxidase mimics. Given this, this review aims to provide a comprehensive overview of the POM-based nanozymes, covering their structural categorization, evolution, and various applications over the past decade. The dynamic nature of this field would promise the intriguing challenges and opportunities in the future. Additionally, we address the existing issues with the POM-based peroxidase-like enzymes and suggest the potential directions for future research. This review would serve as a valuable resource for researchers seeking to develop the improved therapeutic and diagnostic technologies using the POM-based nanozymes, thereby advancing the fields of biochemistry and materials science.
{"title":"Polyoxometalate-based peroxidase-like nanozymes","authors":"Xiangwei Liu , Tiedong Sun , Yuan Sun , Alina Manshina , Lei Wang","doi":"10.1016/j.nanoms.2024.03.002","DOIUrl":"10.1016/j.nanoms.2024.03.002","url":null,"abstract":"<div><div>Nanozymes, as a new generation of artificial enzymes, exhibit similar chemical properties, catalytic efficiency, and reaction kinetics to natural enzymes. Nanozymes can offer several advantages over natural enzymes, including the decreased cost, the increased stability, and the enhanced catalytic activity. These advantages have positioned nanozymes as a research focus in the fields of chemistry, materials and biomedicine. Polyoxometalates (POMs) and their composites have been found to possess excellent catalytic capabilities as peroxidase mimics. Given this, this review aims to provide a comprehensive overview of the POM-based nanozymes, covering their structural categorization, evolution, and various applications over the past decade. The dynamic nature of this field would promise the intriguing challenges and opportunities in the future. Additionally, we address the existing issues with the POM-based peroxidase-like enzymes and suggest the potential directions for future research. This review would serve as a valuable resource for researchers seeking to develop the improved therapeutic and diagnostic technologies using the POM-based nanozymes, thereby advancing the fields of biochemistry and materials science.</div></div>","PeriodicalId":33573,"journal":{"name":"Nano Materials Science","volume":"7 1","pages":"Pages 24-48"},"PeriodicalIF":9.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140271071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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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