Yuanyuan Zhou, Zhe Zhang, Baojie Shi and Jiangwei Ma
{"title":"Preparation of NaV6O15/V2CTX composite materials for room-temperature ammonia sensing","authors":"Yuanyuan Zhou, Zhe Zhang, Baojie Shi and Jiangwei Ma","doi":"10.1039/D5NJ01102G","DOIUrl":"https://doi.org/10.1039/D5NJ01102G","url":null,"abstract":"<p >MXenes exhibit promise for room temperature sensing owing to their processability in solution, substantial surface area and minimal resistance. The research on vanadium-based oxides (NaV<small><sub>6</sub></small>O<small><sub>15</sub></small>) has focused on catalytic applications (H<small><sub>2</sub></small>S oxidation) and energy storage (sodium-ion and zinc-ion batteries), showing that NaV<small><sub>6</sub></small>O<small><sub>15</sub></small> possesses structural stability and adjustable chemical properties, which suggests that it is a potential gas sensing material. This study introduces a facile method for synthesizing NaV<small><sub>6</sub></small>O<small><sub>15</sub></small>/V<small><sub>2</sub></small>CT<small><sub><em>X</em></sub></small> composites by calcining V<small><sub>2</sub></small>CT<small><sub><em>X</em></sub></small> MXene precursors in an air atmosphere. The composite material maintains the open layered structure of the V<small><sub>2</sub></small>CT<small><sub><em>X</em></sub></small> MXene precursor. The conductive network of MXene and the chemical reactivity of vanadium oxides were used to improve room-temperature ammonia (NH<small><sub>3</sub></small>) sensing capabilities. Gas sensitivity assessments reveal a response of 2.5% to 100 ppm NH<small><sub>3</sub></small> at room temperature. The response decay was less than 30% over 27 days of continuous testing, demonstrating exceptional long-term stability. This investigation is the first application of NaV<small><sub>6</sub></small>O<small><sub>15</sub></small> in gas sensing applications, offering novel perspectives on the development of low-power, highly durable MXene-based NH<small><sub>3</sub></small> sensors.</p>","PeriodicalId":95,"journal":{"name":"New Journal of Chemistry","volume":" 20","pages":" 8361-8367"},"PeriodicalIF":2.7,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144090880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kannan Vellaisamy, Ayerathal Velmurugan, Esakkimuthu Shanmugasundaram, Nithesh Kumar Krishnan, Vaseeharan Baskaralingam, Ashokkumar Sibiya and Stalin Thambusamy
{"title":"Synthesis of carbon quantum dots from neem fruit flesh for dual metal sensing, bioimaging, and antibacterial applications†","authors":"Kannan Vellaisamy, Ayerathal Velmurugan, Esakkimuthu Shanmugasundaram, Nithesh Kumar Krishnan, Vaseeharan Baskaralingam, Ashokkumar Sibiya and Stalin Thambusamy","doi":"10.1039/D5NJ00292C","DOIUrl":"https://doi.org/10.1039/D5NJ00292C","url":null,"abstract":"<p >This study reports a straightforward one-step synthesis of carbon quantum dots (CQDs) derived from neem fruit flesh, a readily accessible natural biosource. The synthesized neem fruit flesh-derived CQDs (NFF-CQDs) exhibited excellent optical properties with a quantum yield of 0.2209. Their size, functional groups, and surface charge were analyzed using HR-TEM, FT-IR, and DLS. These NFF-CQDs demonstrated dual metal-sensing capabilities: fluorescence enhancement for Al<small><sup>3+</sup></small> ions and fluorescence quenching for Fe<small><sup>3+</sup></small> ions, enabling the selective and sensitive detection of both metal ions at nanomolar concentrations. The Benesi–Hildebrand and Stern–Volmer plots indicated that Fe<small><sup>3+</sup></small> ions bound more strongly than Al<small><sup>3+</sup></small> ions. Additionally, NFF-CQDs exhibited low toxicity in MCF-7 cell bioimaging and enhanced antibacterial activity against <em>E. coli</em> under blue light irradiation.</p>","PeriodicalId":95,"journal":{"name":"New Journal of Chemistry","volume":" 20","pages":" 8413-8427"},"PeriodicalIF":2.7,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144090951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hao Li, Guang-yuan Zhang, Ning-ning Du, Le-wu Zhan, Jing Hou and Bin-dong Li
{"title":"4,4′-Dimethyl-1,1′-bi(1,2,3-triazole): exploring new insensitive energy source materials†","authors":"Hao Li, Guang-yuan Zhang, Ning-ning Du, Le-wu Zhan, Jing Hou and Bin-dong Li","doi":"10.1039/D5NJ00679A","DOIUrl":"https://doi.org/10.1039/D5NJ00679A","url":null,"abstract":"<p >The safety and thermal stability of energetic materials have attracted increasing attention, while the development of simpler synthesis routes is also one of the main goals pursued by researchers in the field of energetic materials. To meet these needs, a novel energy-containing compound 4,4′-dimethyl-1,1′-bi(1,2,3-triazole) (<strong>2</strong>) with low mechanical sensitivity was synthesized from pyruvaldehyde and hydrazine hydrate in this work, which provided a new way of constructing long nitrogen compounds. The structure of energetic compound <strong>2</strong> was characterized by NMR (<small><sup>1</sup></small>H and <small><sup>13</sup></small>C), infrared spectroscopy (IR) and X-ray crystallography. The results showed that <strong>2</strong> is mechanically insensitive (IS = 30 J, FS = 160 N) with detonation properties (<em>D</em> = 6844 m s<small><sup>−1</sup></small>, <em>P</em> = 16 GPa).</p>","PeriodicalId":95,"journal":{"name":"New Journal of Chemistry","volume":" 20","pages":" 8437-8441"},"PeriodicalIF":2.7,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144090953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jiudi Zhang, Ruyu Zhang, Xiaowei Jia, Jinming Li, Mingliang Sun, Shikang Zhang, Zhenfu Guo, Xiaoyan Jiao, Xianchun Liu, Zhanshuang Jin, Junjie Li and Yan Xing
{"title":"Template-free synthesis of honeycomb-structured Ta3N5 foam nanoplates with expanded light absorption, abundant active sites and fast charges transport for visible-light-driven H2 evolution†","authors":"Jiudi Zhang, Ruyu Zhang, Xiaowei Jia, Jinming Li, Mingliang Sun, Shikang Zhang, Zhenfu Guo, Xiaoyan Jiao, Xianchun Liu, Zhanshuang Jin, Junjie Li and Yan Xing","doi":"10.1039/D5NJ00730E","DOIUrl":"https://doi.org/10.1039/D5NJ00730E","url":null,"abstract":"<p >Tantalum nitride (Ta<small><sub>3</sub></small>N<small><sub>5</sub></small>) with suitable band structure and high theoretical solar-to-hydrogen energy conversion efficiency (15.9%) is regarded as one of the most promising semiconductor-based photocatalysts for hydrogen evolution <em>via</em> water splitting. However, it is practically constrained by the slow carrier mobility, fast electron–hole recombination and unabundant catalytic active sites. Herein, honeycomb-structured Ta<small><sub>3</sub></small>N<small><sub>5</sub></small> foam nanoplates were successfully synthesized using a simple template-free strategy. It can not only capture broader visible light to generate the high concentration of photo-generated carriers, but also accelerate the rapid transport/separation of carriers and provide abundant active sites to accelerate the kinetics of water splitting reaction. Therefore, honeycomb-structured Ta<small><sub>3</sub></small>N<small><sub>5</sub></small> exhibits excellent photocatalytic performance with a remarkably enhanced H<small><sub>2</sub></small> production rate of 59.16 μmol h<small><sup>−1</sup></small> g<small><sup>−1</sup></small>, which is 22.7 times higher than that of the conventional bulk Ta<small><sub>3</sub></small>N<small><sub>5</sub></small>. Moreover, the unique Ta<small><sub>3</sub></small>N<small><sub>5</sub></small> with honeycomb structure has outstanding stability and recycling ability. This work provides a simple and effective strategy for the preparation of Ta<small><sub>3</sub></small>N<small><sub>5</sub></small>-based photocatalysts for efficient and stable H<small><sub>2</sub></small> production.</p>","PeriodicalId":95,"journal":{"name":"New Journal of Chemistry","volume":" 20","pages":" 8485-8493"},"PeriodicalIF":2.7,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144090819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Palkaran Sethi, Soumen Basu and Sanghamitra Barman
{"title":"Innovative CuBTC/g-C3N4 materials for tetracycline mitigation: adsorption, photocatalysis, and mechanistic perspectives†","authors":"Palkaran Sethi, Soumen Basu and Sanghamitra Barman","doi":"10.1039/D5NJ00556F","DOIUrl":"https://doi.org/10.1039/D5NJ00556F","url":null,"abstract":"<p >The widespread accumulation of antibiotic pollutants in water sources calls for advanced and efficient remediation strategies to curb environmental contamination. In this study, a CuBTC (copper benzene-1,3,5-tricarboxylate) with g-C<small><sub>3</sub></small>N<small><sub>4</sub></small> heterojunction photocatalyst was synthesized <em>via</em> a hydrothermal approach in varying ratios (1 : 1, 1 : 3, and 3 : 1) and comprehensively characterized using XRD, FESEM, EDS, HRTEM, EIS, UV-DRS, PL, TGA, FTIR, XPS, and BET measurements, confirming the composite's crystallinity, morphology, elemental composition, charge transport properties, optical behavior, stability, and porosity. Among the tested compositions, the 3 : 1 CuBTC/g-C<small><sub>3</sub></small>N<small><sub>4</sub></small> composite exhibited the highest efficiency, achieving an impressive 97.4% degradation of 25 ppm tetracycline (TC) within just 60 minutes under UV illumination, with a remarkable rate constant of 0.02098 min<small><sup>−1</sup></small>. Stability assessments confirmed its excellent reusability over six consecutive cycles, with only a slight decline in performance to 82.7%. The adsorption behaviour of the composite was analyzed using six isotherm models—Langmuir, Freundlich, Halsey, Harkins–Jura, Temkin, and Dubinin–Radushkevich—along with five kinetic models, including pseudo-first-order, pseudo-second-order, intraparticle diffusion, Elovich, and liquid film models. Adsorption followed the Langmuir isotherm (<em>R</em><small><sup>2</sup></small> = 0.992) and pseudo-second-order kinetics (<em>R</em><small><sup>2</sup></small> = 0.968), while photocatalytic degradation aligned with pseudo-second-order kinetics (<em>R</em><small><sup>2</sup></small> = 0.993). Mechanistic studies identified superoxide radicals as the primary reactive species, supported by hydroxyl radicals, electrons, and holes in the degradation pathway. Mineralization studies revealed significant reductions in TOC (67.8%) and COD (68.6%), while LC-MS analysis provided a comprehensive degradation pathway, illustrating the breakdown of TC into intermediates through ring-opening and oxidative transformations. Thermodynamic assessments indicated that the degradation process was exothermic and spontaneous. Δ<em>G</em>, Δ<em>H</em> and Δ<em>S</em> values were found to be 92.7 J mol<small><sup>−1</sup></small>, −63.84 kJ mol<small><sup>−1</sup></small>, and −0.214 kJ mol<small><sup>−1</sup></small> K<small><sup>−1</sup></small> respectively.</p>","PeriodicalId":95,"journal":{"name":"New Journal of Chemistry","volume":" 20","pages":" 8454-8471"},"PeriodicalIF":2.7,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/nj/d5nj00556f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144090955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthesis and characterization of transition metal-based polyoxometalates for dual sensing of biomarkers such as nitrite ions and hydrogen sulphide†","authors":"Celin T and Gandhimathi S","doi":"10.1039/D5NJ01092F","DOIUrl":"https://doi.org/10.1039/D5NJ01092F","url":null,"abstract":"<p >Accelerated industrial development and expansion have led to increasing concentrations of pollutants, such as nitrite ions (NO<small><sub>2</sub></small><small><sup>−</sup></small>) and hydrogen sulphide (H<small><sub>2</sub></small>S) in water. Theses biomarkers can be monitored using polyoxometalates, which are known for their versatile redox properties. In this study, we have synthesized three POMs, (NH<small><sub>4</sub></small>)<small><sub>8</sub></small>[Cu<small><sub>2</sub></small>Mo<small><sub>10</sub></small>O<small><sub>22</sub></small>(O<small><sub>2</sub></small>)<small><sub>12</sub></small>] (<strong>1</strong>), [Cu(arg)<small><sub>2</sub></small>]<small><sub>3</sub></small>[Mo<small><sub>6</sub></small>SO<small><sub>24</sub></small>] (<strong>2</strong>) and [Cu(glu)]<small><sub>2</sub></small>[CuMoO<small><sub>4</sub></small>(OH)<small><sub>4</sub></small>] (<strong>3</strong>), <em>via</em> a one-pot synthesis for the detection of NO<small><sub>2</sub></small><small><sup>−</sup></small> ions. Studies such as FT-IR analysis, UV-visible spectra, NMR spectroscopy, EPR spectroscopy, Powder X-ray diffraction and SEM-EDX analysis were used to understand the structure of the POMs. The influence of pH on the electrochemical behavior of Cu-POMs <strong>1</strong>, <strong>2</strong> and <strong>3</strong> was analyzed through cyclic voltammetry (CV) and bulk electrolysis at a potential of −0.8 to 1.4 V. The influence of the scan rate was analyzed using a [Fe(CN)<small><sub>6</sub></small>]<small><sup>4−/3−</sup></small> redox couple. The electrocatalytic detection of nitrite ions was determined using a potential of −1 to 1.5 V and 0.5 V–1.5 V to record CV and differential pulse voltammetry (DPV). Results show that Cu-POM <strong>1</strong> exhibited higher detection capability over a concentration range of 5 μM–0.1 M. Cu-POM <strong>2</strong> showed detection for the concentration range of 5–400 μM. The antioxidant activity of the POMs followed the trend <strong>2</strong> > <strong>1</strong> > <strong>3</strong>. The colorimetric detection of H<small><sub>2</sub></small>S could be performed over a concentration range of 1–100 mM.</p>","PeriodicalId":95,"journal":{"name":"New Journal of Chemistry","volume":" 20","pages":" 8472-8484"},"PeriodicalIF":2.7,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144090956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Stability and structures of La, Y, and Sc endohedral metalloazafullerenes: the role of cage topology, N-doping site, and metal†","authors":"Jiaojiao Lin and Yang Wang","doi":"10.1039/D5NJ01469G","DOIUrl":"https://doi.org/10.1039/D5NJ01469G","url":null,"abstract":"<p >Endohedral metalloazafullerenes (EMAFs) are a distinctive class of fullerene derivatives characterized by the encapsulation of metal atoms or clusters within azafullerene cages. These intriguing nanomaterials exhibit unique properties with potential applications in quantum computing, molecular magnets, and optoelectronics. However, due to the experimental characterization limitations and the structural complexity that complicates computational studies, reliably identifying the molecular structures of EMAFs remains a challenging task. Moreover, the factors influencing their stability, such as cage topology, nitrogen doping sites, and encapsulated metal species, are not yet well understood. In this study, we employ density functional theory (as high as BP86/Def2-QZVP) to systematically investigate the stability and structures of monometallic EMAFs, M@C<small><sub>2<em>n</em>–1</sub></small>N (M = La, Y, Sc; 2<em>n</em> = 82, 84, 80, 72), focusing on the interplay between cage size and isomerism, nitrogen substitution, and metal encapsulation. We demonstrate that the experimentally observed La@C<small><sub>81</sub></small>N-<em>C</em><small><sub>3<em>v</em></sub></small>(8) structure corresponds to the most thermodynamically stable isomer. We further predict that all EMAFs studied exhibit significantly negative formation free energies, suggesting they are promising synthetic targets, particularly La@C<small><sub>83</sub></small>N-<em>D</em><small><sub>2<em>d</em></sub></small>(23) and La@C<small><sub>79</sub></small>N-<em>D</em><small><sub>5<em>h</em></sub></small>(6). Our results show that larger cage sizes, La encapsulation, and nitrogen substitution at pentagon-rich sites enhance the stability of monometallic EMAFs. These observations can be explained using simple electrostatic models and the topological charge stabilization rule. Our findings not only deepen the understanding of EMAF chemistry but also provide valuable insights for the design of EMAF-based functional materials with engineered electronic and magnetic properties.</p>","PeriodicalId":95,"journal":{"name":"New Journal of Chemistry","volume":" 21","pages":" 8769-8781"},"PeriodicalIF":2.7,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144140108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Qishan Xu, Xuetong Ji, Changkang Sun, Xiangyan Chen and Yantao Li
{"title":"Precise regulation of MOF morphology and structure via organic linker ratio adjustment for enhanced tumor-specific therapy†","authors":"Qishan Xu, Xuetong Ji, Changkang Sun, Xiangyan Chen and Yantao Li","doi":"10.1039/D5NJ01116G","DOIUrl":"https://doi.org/10.1039/D5NJ01116G","url":null,"abstract":"<p >Precise control over the morphology and structure of metal–organic frameworks (MOFs) for optimizing their functional properties, particularly in tumor-specific therapy, remains a significant challenge. Here, we demonstrate the tunable construction of MOFs by adjusting the ratio of two organic linkers, 4,4′-dithiobisbenzoic acid (DTBA) and 4-((4-carboxybenzyl)amino)benzoic acid (CBAB), which govern the crystallinity and catalytic behavior of the resulting nanoparticles (NPs). FeCl<small><sub>3</sub></small> reacted with DTBA to produce crystalline rod-shaped MOFs, while CBAB led to amorphous spherical nanoparticles. Increasing the DTBA content enhanced catalytic performance by modulating the iron catalytic environment, significantly promoting reactive oxygen species (ROS) generation and glutathione (GSH) depletion. Cellular experiments confirmed that DTBA-rich MOFs exhibited potent anticancer activity <em>via</em> an amplified chemodynamic therapy (CDT) effect. This study provides a promising strategy for designing next-generation nanomaterials with precisely tailored structures and functionalities.</p>","PeriodicalId":95,"journal":{"name":"New Journal of Chemistry","volume":" 19","pages":" 7725-7730"},"PeriodicalIF":2.7,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143938048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jing Li, Jia Li, Cheng Tang, Fen Wang, Shuang Yan and Yanglei Li
{"title":"Facile synthesis of spherical porphyrin polymer-supported cobalt nanoparticles for the efficient catalytic hydrogenation of 4-NP†","authors":"Jing Li, Jia Li, Cheng Tang, Fen Wang, Shuang Yan and Yanglei Li","doi":"10.1039/D4NJ05375C","DOIUrl":"https://doi.org/10.1039/D4NJ05375C","url":null,"abstract":"<p >A spherical porphyrin polymer-supported cobalt nano-catalyst P-TPP-Co(<small>II</small>) was synthesized using a simple method that does not require additional reduction or pyrolysis steps, where P-TPP is tetraphenyl porphyrin polymer. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) analyses demonstrated that Co ions were reduced <em>in situ</em> on the surface of the porphyrin polymer microspheres during the reduction experiment, and nanoflower structures were grown. The catalyst exhibited high catalytic activity for the hydrogenation of 4-nitrophenol under mild conditions, with a first-order reaction rate constant of 0.274 min<small><sup>−1</sup></small>. Experimental results confirmed that Co played a crucial role in the catalytic reaction. The high performance observed can be attributed to the unique properties of the Co nanoflower catalyst structure and the synergistic effects between Co elements and porphyrin polymers. This includes the strong adsorption capability of the spherical porphyrin polymer carrier for organic molecules and the excellent electrical conductivity of the porphyrin molecules to the Co nanoflower. Furthermore, the cobalt-based catalyst is relatively inexpensive and can be recycled up to six times, facilitating low-cost hydrogenation of 4-nitrophenol to 4-aminophenol. Additionally, in the catalytic degradation of Rhodamine B, the catalyst demonstrated good catalytic performance.</p>","PeriodicalId":95,"journal":{"name":"New Journal of Chemistry","volume":" 20","pages":" 8259-8266"},"PeriodicalIF":2.7,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144090909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Meng Li, Qian Cai, Wenting Hong, Xu He and Wei Liu
{"title":"Two-dimensional Sb2Te3/MoSe2 van der Waals heterojunction for high-sensitivity photodetectors†","authors":"Meng Li, Qian Cai, Wenting Hong, Xu He and Wei Liu","doi":"10.1039/D5NJ01096A","DOIUrl":"https://doi.org/10.1039/D5NJ01096A","url":null,"abstract":"<p >Photodetectors based on two-dimensional (2D) materials are revolutionizing optoelectronics by enabling high sensitivity, ultrafast response, and broadband detection. However, standalone 2D materials often suffer from high dark current, slow response times, and limited light absorption. Here, we demonstrate a high-performance photodetector based on a Sb<small><sub>2</sub></small>Te<small><sub>3</sub></small>/MoSe<small><sub>2</sub></small> van der Waals (vdW) heterojunction, leveraging the topologically protected surface states of Sb<small><sub>2</sub></small>Te<small><sub>3</sub></small> and the strong light absorption of MoSe<small><sub>2</sub></small>. The built-in electric field at the heterojunction interface enhances charge separation, suppresses recombination, and significantly reduces dark current. As a result, the device exhibits a high detectivity of 5.14 × 10<small><sup>12</sup></small> Jones, an exceptional photoresponsivity of 178 A W<small><sup>−1</sup></small>, and fast response times of 110 μs (rise) and 230 μs (fall) under 532 nm illumination at 1 V bias. Additionally, the heterojunction enables broadband photodetection spanning 532 to 1550 nm, making it suitable for optical communication and sensing applications. This work provides new insights into the integration of topological insulators with transition metal dichalcogenides (TMDs) to achieve next-generation optoelectronic devices with superior performance.</p>","PeriodicalId":95,"journal":{"name":"New Journal of Chemistry","volume":" 20","pages":" 8512-8519"},"PeriodicalIF":2.7,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144090822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}