Journal of Materials Chemistry C最新文献

{"title":"High-performance n-type polymer field-effect transistors with exceptional stability†","authors":"Manikanta Makala, Maciej Barłóg, Derek Dremann, Salahuddin Attar, Edgar Gutiérrez Fernández, Mohammed Al-Hashimi and Oana D. Jurchescu","doi":"10.1039/D4TC03294B","DOIUrl":"https://doi.org/10.1039/D4TC03294B","url":null,"abstract":"<p >Development of organic field-effect transistors (OFETs) that simultaneously exhibit high-performance and high-stability is critical for complementary integrated circuits and other applications based on organic semiconductors. While progress has been made in enhancing p-channel devices, engineering competitive n-type organic transistors remains a formidable obstacle. Herein, we demonstrate the achievement of high-mobility n-type OFETs with unprecedented operational stability through innovative device and material engineering. Thin film transistors fabricated on donor–acceptor polymers based on indacenodithiazole (IDTz) and diketopyrrolopyrrole (DPP) units exhibit electron mobilities up to 1.3 cm<small>²</small> V<small>⁻¹</small> s<small>⁻¹</small>, along with a negligible change in mobility, and threshold voltage shift as low as 0.5 V under continuous bias stress of 60 V for both the gate-source and drain-source voltages persisting for more than 1000 min. These remarkable properties position our OFETs as formidable counterparts to p-type transistors, addressing a longstanding challenge in the field.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/tc/d4tc03294b?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142565671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design of lithium disilicate glass-ceramic based highly thermally stable LuAG:Ce PiG green converter for dynamic laser illumination†","authors":"Yusai Xu, Qianxiong Wen, Xidong Wang, Cong Zhao, Enrou Mei, Meilin Fu, Tengfei Tian, Xiaojuan Liang, Wenxia Gao and Weidong Xiang","doi":"10.1039/D4TC03186E","DOIUrl":"https://doi.org/10.1039/D4TC03186E","url":null,"abstract":"<p >Phosphor-in-glass (PiG) is widely used in laser illumination because of its low-temperature sintering process and high luminous efficiency. The selection of the glass matrix is essential for achieving high stability in PiG and preserving the original properties of the phosphor particles within it. In this study, a novel lithium disilicate glass-ceramic (LDGC) was developed as a matrix material. A series of LDGC-LuAG PiGs were synthesized at low temperatures using a one-step sintering method. The precipitation of lithium disilicates (LDs) greatly enhanced the thermal stability of the material. The LDGC-LuAG PiG exhibits an impressive thermal conductivity of 3.5 W m<small>⁻¹</small> K<small>⁻¹</small>, a luminous efficiency (LE) as high as 246 lm W<small>⁻¹</small>, and a maximal luminous flux (LF) of 1584 lm with a conversion efficiency (CE) reaching up to 69%. Furthermore, the LDGC-LuAG PiG color wheel was developed and encapsulated in a commercial dynamic laser illumination module. At 190 W of blue input power, a bright green light was produced with a surprising LF of 19 654 lm, which even exceeded the commercial silicone color wheel. This study is expected to create new prospects for high-power laser illumination.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142595216","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}

{"title":"Thermal enhancement of the upconversion luminescence of Zn2+ ion-doped KYb(MoO4)2:Er3+ phosphors for multimode temperature sensing","authors":"Junshan Hu, Daobin Zhu, Yuxiang Wu, Keyu Guo, Changchun Ding, Rangrang Fan, Chunfeng Dong, Wei Jin and Yongtao Liu","doi":"10.1039/D4TC02959C","DOIUrl":"https://doi.org/10.1039/D4TC02959C","url":null,"abstract":"<p >Pure phase KYb(MoO<small>₄</small>)<small>₂</small>:Er<small>³⁺</small> phosphors doped with different concentrations of Zn<small>²⁺</small> ions were prepared by a high temperature solid phase method. Based on XRD refinement results, some Yb<small>³⁺</small> ions and K<small>⁺</small> ions were replaced by Zn<small>²⁺</small> ions. The upconversion luminescence (UCL) spectra of 980 nm laser excitation show that KYb(MoO<small>₄</small>)<small>₂</small>:Er<small>³⁺</small> emits single near-infrared light and KYb(MoO<small>₄</small>)<small>₂</small>:Er<small>³⁺</small>,Zn<small>²⁺</small> presents multi-modal UCL emission. The optimal doping concentration of Zn<small>²⁺</small> ions was 0.08. Meanwhile, the energy transfer process of UCL was revealed by optical characterization methods. The temperature sensing characteristics of the phosphor were tested in the temperature range of 298–523 K. The phosphor exhibits thermal enhancement. Variable temperature XRD from 298 K to 523 K resulted in a slight enlargement and expansion in the refinement of cell parameters and volume. This indicates that thermal enhancement is attributed to the lattice structure distortion caused by doping of Zn<small>²⁺</small> ions, not caused by phase transformation and negative thermal expansion. In addition, the relative and absolute sensitivities of the phosphor were 1.1% K<small>⁻¹</small> at 298 K and 1.73% K<small>⁻¹</small> at 348 K, respectively. This provides a new approach and opens up new avenues for the theory of thermally enhanced luminescence.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142368680","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}

{"title":"Cost-effective synthesis of rGO/CeNiO3 perovskite nanocomposites for enhanced and stable supercapacitors and oxygen evolution reaction catalysts†","authors":"Lakshmanan Kumaresan, Govindasamy Palanisamy and Jintae Lee","doi":"10.1039/D4TC03159H","DOIUrl":"https://doi.org/10.1039/D4TC03159H","url":null,"abstract":"<p >The main goal of this study is to make a nanocomposite electrode and electrocatalyst that combines the high conductivity of reduced rGO with CeNiO<small>₃</small> nanoparticles to improve the OER and supercapacitors’ performance. This nanocomposite, rGO/CeNiO<small>₃</small>, was designed to improve energy storage capacity and catalytic efficiency. To synthesize the rGO/CeNiO<small>₃</small> nanocomposite, reduced graphene oxide was produced using a straightforward hammer modification method with a milling process, while cerium perovskite nanoparticles and composites were obtained through coprecipitation and ultrasonication techniques. The produced nanoparticle's shape, oxidation states, and crystal structure were all determined by the many characterizations that were carried out. The electrochemical performance tests compared the behavior of CeO<small>₂</small>, CeNiO<small>₃</small>, and rGO/CeNiO<small>₃</small> electrodes to evaluate their potential in supercapacitors. The rGO/CeNiO<small>₃</small> nanocomposite exhibited impressive pseudocapacitive properties, with a specific capacitance of 1208.7 F g<small>⁻¹</small> at a current density of 1 A g<small>⁻¹</small>. The material's cycling stability was remarkable; it maintained 91% of its initial capacitance even after 6000 charge discharge. Additionally, the rGO/CeNiO<small>₃</small> composite exhibited superior and consistent electrocatalytic performance. To reach a current density of 10 mA cm<small>⁻²</small> during the oxygen evolution process, an overpotential of just 227 mV was needed. These results suggest that graphene and perovskite-based nanocomposites have significant potential for supercapacitors and reliable electrocatalysts.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518288","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}

{"title":"Observation and enhancement through alkali metal doping of p-type conductivity in the layered oxyselenides Sr2ZnO2Cu2Se2 and Ba2Zn1−xO2−xCu2Se2†","authors":"Zahida Malik, Sarah Broadley, Sebastian J. C. Herkelrath, Daniel W. Newbrook, Liam Kemp, George Rutt, Zoltán A. Gál, Jack N. Blandy, Joke Hadermann, Daniel W. Davies, Robert D. Smyth, David O. Scanlon, Ruomeng Huang, Simon J. Clarke and Geoffrey Hyett","doi":"10.1039/D4TC02458C","DOIUrl":"10.1039/D4TC02458C","url":null,"abstract":"&lt;p &gt;The optoelectronic properties of two layered copper oxyselenide compounds, with nominal composition Sr&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;ZnO&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;Cu&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;Se&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt; and Ba&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;ZnO&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;Cu&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;Se&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;, have been investigated to determine their suitability as p-type conductors. The structure, band gaps and electrical conductivity of pristine and alkali-metal-doped samples have been determined. We find that the strontium-containing compound, Sr&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;ZnO&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;Cu&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;Se&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;, adopts the expected tetragonal &lt;em&gt;Sr&lt;/em&gt;&lt;small&gt;&lt;sub&gt;&lt;em&gt;2&lt;/em&gt;&lt;/sub&gt;&lt;/small&gt;&lt;em&gt;Mn&lt;/em&gt;&lt;small&gt;&lt;sub&gt;&lt;em&gt;3&lt;/em&gt;&lt;/sub&gt;&lt;/small&gt;&lt;em&gt;SbO&lt;/em&gt;&lt;small&gt;&lt;sub&gt;&lt;em&gt;2&lt;/em&gt;&lt;/sub&gt;&lt;/small&gt; structure with &lt;em&gt;I&lt;/em&gt;4/&lt;em&gt;mmm&lt;/em&gt; symmetry, and has a band gap of 2.16 eV, and a room temperature conductivity of 4.8 × 10&lt;small&gt;&lt;sup&gt;−1&lt;/sup&gt;&lt;/small&gt; S cm&lt;small&gt;&lt;sup&gt;−1&lt;/sup&gt;&lt;/small&gt;. The conductivity of the compound could be increased to 4.2 S cm&lt;small&gt;&lt;sup&gt;−1&lt;/sup&gt;&lt;/small&gt; when sodium doped to a nominal composition of Na&lt;small&gt;&lt;sub&gt;0.1&lt;/sub&gt;&lt;/small&gt;Sr&lt;small&gt;&lt;sub&gt;1.9&lt;/sub&gt;&lt;/small&gt;ZnO&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;Cu&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;Se&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;. In contrast, the barium containing material was found to have a small zinc oxide deficiency, with a sample dependent compositional range of Ba&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;Zn&lt;small&gt;&lt;sub&gt;1−&lt;em&gt;x&lt;/em&gt;&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;2−&lt;em&gt;x&lt;/em&gt;&lt;/sub&gt;&lt;/small&gt;Cu&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;Se&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt; where 0.01 &lt; &lt;em&gt;x&lt;/em&gt; &lt; 0.06, as determined by single crystal X-ray diffraction and powder neutron diffraction. The barium-containing structure could also be modelled using the tetragonal &lt;em&gt;I&lt;/em&gt;4/&lt;em&gt;mmm&lt;/em&gt; structure, but significant elongation of the oxygen displacement ellipsoid along the Zn–O bonds in the average structure was observed. This indicated that the oxide ion position was better modelled as a disordered split site with a displacement to change the local zinc coordination from square planar to linear. Electron diffraction data confirmed that the oxide site in Ba&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;Zn&lt;small&gt;&lt;sub&gt;1−&lt;em&gt;x&lt;/em&gt;&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;2−&lt;em&gt;x&lt;/em&gt;&lt;/sub&gt;&lt;/small&gt;Cu&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;Se&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt; does not adopt a long range ordered arrangement, but also that the idealised &lt;em&gt;I&lt;/em&gt;4/&lt;em&gt;mmm&lt;/em&gt; structure with an unsplit oxide site was not consistent with the extra reflections observed in the electron diffractograms. The band gap and conductivity of Ba&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;Zn&lt;small&gt;&lt;sub&gt;1−&lt;em&gt;x&lt;/em&gt;&lt;/sub&gt;&lt;/small&gt;O&lt;small&gt;&lt;sub&gt;2−&lt;em&gt;x&lt;/em&gt;&lt;/sub&gt;&lt;/small&gt;Cu&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt;Se&lt;small&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;/small&gt; were determined to be 2.22 eV and 2.0 × 10&lt;small&gt;&lt;sup&gt;−3&lt;/sup&gt;&lt;/small&gt; S cm&lt;small&gt;&lt;sup&gt;−1&lt;/sup&gt;&lt;/small&gt; respectively. The conductivity could be in","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11440232/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142363528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Superior energy storage performance and transparency in (K0.5Na0.5)(Nb0.97Ta0.03)O3-based ceramics†","authors":"Wenjing Bi, Ying Li, Juan Du, Jingwen Sun, Zhe Wang, Wenna Chao, Jigong Hao, Peng Fu, Peng Li and Wei Li","doi":"10.1039/D4TC03682D","DOIUrl":"https://doi.org/10.1039/D4TC03682D","url":null,"abstract":"<p >Lead-free transparent ferroelectric ceramics are an ideal material to meet the needs of pulsed power technology and optical transparency because of their excellent optical transparency and energy storage performances. However, it is difficult for lead-free ceramics to have both high energy storage performance and high optical transmittance, which limits the development of high-performance and multifunctional devices. Through this paper, we propose a method to construct strong relaxor ferroelectric KNN-based ceramics with nano-domains by adding Sr<small>²⁺</small>, Li<small>⁺</small> and Nb<small>⁵⁺</small>, which greatly improves the transparent energy storage performance. By introducing appropriate amounts of Sr<small>²⁺</small>, Li<small>⁺</small> and Nb<small>⁵⁺</small>, the sintering temperature is lowered; therefore, the growth of grains is inhibited. Fine rectangular grains and nanoscale domains are formed. The uneven distribution of potassium and sodium relieves the over-concentration of the electric field and ensures that the ceramics do not decompose under a high electric field. The 0.7(K<small>_0.5</small>Na<small>_0.5</small>)(Nb<small>_0.97</small>Ta<small>_0.03</small>)O<small>₃</small>–0.10LiNbO<small>₃</small>–0.20SrCO<small>₃</small> ceramic has an ultra-high recoverable energy storage density (<em>W</em><small>_rec</small>) of 5.9 J cm<small>⁻³</small>, excellent energy storage efficiency (<em>η</em>) of 84.2%, large dielectric breakdown strength (<em>E</em><small>_b</small>) of 490 kV cm<small>⁻¹</small>, high hardness value of 7.57 GPa, and good light transmittance of 43.0% (at 900 nm). Additionally, excellent temperature and frequency stability are obtained. The dense microstructure, nanoscale grains, symmetrical lattice structure, and strong relaxation behavior are the main reasons for obtaining high energy storage, hardness, and transparency properties.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142595198","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}

{"title":"An aluminum-based hybrid film photoresist for advanced lithography by molecular layer deposition†","authors":"Xingkun Wang, Taoli Guo, Yiyang Shan, Ou Zhang, Hong Dong, Jincheng Liu and Feng Luo","doi":"10.1039/D4TC02794A","DOIUrl":"https://doi.org/10.1039/D4TC02794A","url":null,"abstract":"<p >In the realm of advanced integrated circuits, the demand for novel resist materials becomes paramount as we progress toward smaller process nodes. Inorganic photoresists have received widespread attention due to their higher absorption of extreme ultraviolet (EUV) light and higher etch resistance. In our study, we employed trimethylaluminum (TMA) and 2-butene-1,4-diol (BED) <em>via</em> molecular layer deposition (MLD) to deposit an Al-based hybrid film coined “TMA–BED,” serving as an electron-beam photoresist. Through inductively coupled plasma (ICP) etching for resistance testing, the TMA–BED film exhibited exceptional selectivity with Si etching, reaching a minimum of ∼86, surpassing traditional photoresists by 14 times. Sensitivity and resolution were assessed using electron-beam lithography with 10 wt% ammonia as the developer, revealing a sensitivity of 450 μC cm<small>⁻²</small> at 2 keV and the capacity to resolve 10 nm line widths at 50 keV. Our results underscore the tremendous potential of TMA–BED hybrid films, deposited through MLD, for advanced lithographic techniques.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142595217","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}

{"title":"Impact of pyrene orientation on the electronic properties and stability of graphene ribbons†","authors":"Tanner Smith, Karl Thorley, Kevin Dimmitt, Sean Parkin, Oksana Ostroverkhova and John Anthony","doi":"10.1039/D4TC03072A","DOIUrl":"10.1039/D4TC03072A","url":null,"abstract":"<p >We report the synthesis and study of trialkylsilylethyne-substituted “oblique” pyrene-fused acenes, carbon nanoribbons demonstrating near-IR absorption with reversible oxidation and reduction, and acene-like evolution of electronic properties upon extension of the aromatic core. Their electronic structures are investigated through DFT studies, which support the more delocalized nature of their frontier molecular orbitals compared to more common “vertical” pyrene systems. Despite a longer aromatic core, the more extended of the two examples demonstrates enhanced photostability compared to the shorter derivative, running counter to the trend in linear acenes. The unusual stability of the longer core is ultimately linked to its relatively low T<small>₁</small> energy inhibiting the generation of reactive O<small>₂</small> species. The byproduct generated upon photooxidation of the shorter nanoribbon appears to catalyze the generation of <small>¹</small>O<small>₂</small> due to its large T<small>₁</small> energy, leading to its relatively decreased stability.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/tc/d4tc03072a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142259486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic in situ growth of a MOF on the surface of Ti3C2Tx MXene nanosheets with different tannic acid (TA) ratios for the photocatalytic degradation of pollutants†","authors":"Huanggen Yang, Pei Zhang, Qi Zheng, Asif Hayat, Hisham S. M. Abd-Rabboh, Saleem Raza, Duofu Li and Yan Sui","doi":"10.1039/D4TC02771J","DOIUrl":"https://doi.org/10.1039/D4TC02771J","url":null,"abstract":"<p >The integration of a two-dimensional (2D) transition metal carbide (MXene) with metal–organic frameworks (MOFs) presents a promising avenue for addressing the limitations of MXene materials in various applications. In this study, we report the fabrication of a novel photocatalyst by <em>in situ</em>-growth self-assembly, where Ti<small>₃</small>C<small>₂</small>T<small>_<em>x</em></small> MXene serves as a substrate for immobilizing ZIF-8 MOFs. This composite, Ti<small>₃</small>C<small>₂</small>T<small>_<em>x</em></small>@ZIF-8, is further modified with tannic acid (TA) and polyphenol compounds to create a cross-linked network, enhancing the heterogeneous interfaces crucial for efficient photocatalysis. Varying concentrations of tannic acid (10, 20, and 30 mg) were explored to optimize photocatalyst performance. Structural characterization confirms the successful synthesis of Ti<small>₃</small>C<small>₂</small>T<small>_<em>x</em></small>@ZIF-8@TA composites, revealing their unique network topology. The prepared ZIF-8, Ti<small>₃</small>C<small>₂</small>T<small>_<em>x</em></small>@TA, Ti<small>₃</small>C<small>₂</small>T<small>_<em>x</em></small>/ZIF-8@TA10, Ti<small>₃</small>C<small>₂</small>T<small>_<em>x</em></small>/ZIF-8@TA20 and Ti<small>₃</small>C<small>₂</small>T<small>_<em>x</em></small>/ZIF-8@TA30 photocatalysts were characterized by various techniques (SEM, EDX, FTIR, XRD, TGA, DRS, and BET surface area measurements). Under visible light irradiation, the photocatalyst demonstrates remarkable degradation efficiencies, with RhB, Congo red and methyl orange dyes achieving approximate degradation rates of 87%, 85%, and 79%, respectively, within 60 minutes. Notably, the photocatalyst exhibits low energy consumption, affordability, non-toxicity, and environmental compatibility, underscoring its practical potential for wastewater treatment applications. This work highlights the advancement in MXene-based photocatalysts and their significant impact on pollutant removal from wastewater.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142595224","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}

{"title":"Matrix-dependent high-contrast photochromism in Eu-doped M3MgSi2O8 (M = Ca, Sr, Ba)†","authors":"Guna Krieke, Andris Antuzevics, Aleksandr Kalinko, Alexei Kuzmin, Tomas Murauskas, Aivaras Kareiva and Aleksej Zarkov","doi":"10.1039/D4TC03091E","DOIUrl":"https://doi.org/10.1039/D4TC03091E","url":null,"abstract":"<p >The photochromic properties and charge transfer processes were studied in novel Eu-doped M<small>₃</small>MgSi<small>₂</small>O<small>₈</small> (M = Ca, Sr, Ba) compounds. These materials exhibit vivid color changes upon irradiation with UV light, resulting in orange, reddish-pink, and green colors. The introduction of europium ions enhances photochromic efficiency and shifts excitation peaks to lower energy ranges. Analysis of diffuse reflectance and electron paramagnetic resonance spectra reveals the formation of both paramagnetic and non-paramagnetic defects, with the dominant signals attributed to electron centers, likely F<small>⁺</small>-type centers. The Eu<small>²⁺</small> → Eu<small>³⁺</small> charge transfer during irradiation indicates that Eu<small>²⁺</small> acts as a hole center. These findings contribute to a better understanding of the mechanisms underlying photochromism in these materials and highlight their potential for practical applications.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/tc/d4tc03091e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}