Optical Materials最新文献_第2页

Near-infrared persistent luminescence of intrinsic Ti3+ in Na0·5Y0·5TiO3 and Na0·5Y0·5TiO3:Pr for dual-modal optical anti-counterfeiting Na0·5Y0·5TiO3和Na0·5Y0·5TiO3:Pr中本征Ti3+的近红外持续发光双模光学防伪

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-01-12 DOI: 10.1016/j.optmat.2026.117886

Gulizhabaier Abulipizi , Leping Ding , Juanjuan Zhou , Xiao Ma , Chaomin Qu , Ziang Zong , Yawen Zheng , Huai Chen , Zhanjun Li

Persistent luminescence (PersL) materials have unique long-term separable excitation-emission properties. In this study, intrinsic near-infrared (NIR) PersL of Ti³⁺ is found at 760 nm in undoped Na_0·5Y_0·5TiO₃ (NYT) after being illuminated to room light or red LED illumination. The low symmetric monoclinic perovskite structure of NYT leads to energy level splitting of Ti³⁺ into ²E_1/2 and ¹E_2/2, which generates a new PersL excitation peak at ∼650 nm. Direct electron transfer from excited Ti³⁺ to oxygen vacancy is verified during the PersL charging process by X-ray photoelectron spectroscopy which avoids cross-band transition. Further, double band visible/NIR PersL is realized by introducing Pr³⁺ into NYT (Na_0·5Y_0·5TiO₃:Pr, NYT-Pr) at 614 and 760 nm, respectively. By observing the anti-Stokes PersL of Pr in NYT-Pr at 614 nm that is rechargeable at 660 nm, a phonon-assisted charging mechanism is proposed, in which Ti³⁺ absorbs excitation and phonon energy to realize electron transfer to oxygen vacancy (V_O). Based on single band PersL NYT and double band PersL NYT-Pr, triple modal optical information encryption was realized by applying their visible fluorescence/visible PersL/invisible NIR PersL properties, showing different levels of optical information. NYT-Pr integrates traditional visible PersL by naked eyes and invisible NIR PersL imaged by CCD camera together, and will find promising applications in modern optics and bio-optics.

持续发光（PersL）材料具有独特的长期可分离激发-发射特性。在本研究中，在未掺杂的Na0·5Y0·5TiO3 （NYT）中，在室内光或红色LED照明下，在760 nm处发现了Ti3+的本征近红外（NIR） PersL。NYT的低对称单斜钙钛矿结构导致Ti3+的能级分裂为2E1/2和1E2/2，在~ 650 nm处产生新的PersL激发峰。利用x射线光电子能谱证实了在PersL充电过程中电子从受激Ti3+直接转移到氧空位，从而避免了跨带跃迁。通过在614 nm和760 nm分别引入Pr3+到NYT （Na0·5Y0·5TiO3:Pr, NYT-Pr）中，实现了双波段可见/近红外perl。通过观察614 nm可充电的NYT-Pr中Pr的反stokes PersL，提出了Ti3+吸收激发和声子能量实现电子向氧空位（VO）转移的声子辅助充电机制。基于单波段PersL NYT和双波段PersL NYT- pr，利用其可见荧光/可见PersL/不可见近红外PersL特性，实现了三模态光学信息加密，显示出不同层次的光学信息。NYT-Pr将传统的肉眼可见PersL和CCD相机成像的不可见近红外PersL结合在一起，在现代光学和生物光学领域具有广阔的应用前景。

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引用次数: 0

Broadband NIR-I/II emitting phosphor Cr3+-Ni2+ Co-doped Mg3Y2Ge3O12 for deep-tissue imaging & night vision 宽带NIR-I/II发射荧光粉Cr3+-Ni2+共掺杂Mg3Y2Ge3O12用于深部组织成像和夜视

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-01-12 DOI: 10.1016/j.optmat.2026.117883

KeXin Zhu , Zhen Yan , Jiwen Chang , Jinmeng Xiang , Renze Chen , Haoliang Yang , Chongfeng Guo

Near-infrared (NIR) phosphors exhibit excellent tissue penetration capabilities and the responsiveness to specific stimuli, endowing them with great application prospects in fields of biological imaging, night vision, and non-destructive testing. However, the development of ultra-broadband NIR light sources for diverse application scenarios remains a significant challenge. Herein, a broadband NIR-emitting phosphor Mg₃Y₂Ge₃O₁₂:Cr³⁺, Ni²⁺ covering the first biological window (NIR-I) and the second biological window (NIR-II) was successfully achieved through Cr³⁺ → Ni²⁺ efficient energy transfer process, where the broad band emission in NIR-I region comes from Cr³⁺ while the other broad band emission in NIR-II zone originates from Ni²⁺. Furthermore, Mg₃Y₂Ge₃O₁₂:Cr³⁺, Ni²⁺ demonstrates excellent thermal stability, with its luminescence intensity only slightly decreases to 61 % of the initial value at 423 K, attributed to the larger Stokes shift. Finally, an NIR phosphor-converted light-emitting diode (pc-LED) was fabricated by combining the as-prepared phosphor Mg₃Y₂Ge₃O₁₂:Cr³⁺, Ni²⁺ with commercial blue light chips (450 nm), which exhibited outstanding performance in biological imaging, non-destructive testing, and night vision.

近红外（NIR）荧光粉具有优异的组织穿透能力和对特定刺激的响应能力，在生物成像、夜视和无损检测等领域具有广阔的应用前景。然而，开发各种应用场景的超宽带近红外光源仍然是一个重大挑战。本文通过Cr3+→Ni2+的高效能量转移过程，成功制备了覆盖第一生物窗口（NIR-I）和第二生物窗口（NIR-II）的宽带nir发光荧光粉Mg3Y2Ge3O12:Cr3+， Ni2+，其中NIR-I区的宽带发射来自Cr3+，而NIR-II区的宽带发射来自Ni2+。此外，Mg3Y2Ge3O12:Cr3+， Ni2+表现出优异的热稳定性，在423 K时，由于Stokes位移较大，其发光强度仅略微下降到初始值的61%。最后，将制备的荧光粉Mg3Y2Ge3O12:Cr3+， Ni2+与商用蓝光芯片（450nm）相结合，制备了近红外磷转换发光二极管（pc-LED），该二极管在生物成像、无损检测和夜视方面表现出优异的性能。

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引用次数: 0

Thermal tuning of the bandgap in β-(AlxGa1-x)2O3/Al2O3 heterostructures for tunable photodetector performance β-(AlxGa1-x)2O3/Al2O3异质结构带隙的热调谐对可调谐光电探测器性能的影响

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-01-12 DOI: 10.1016/j.optmat.2026.117885

Shengsheng Chen , Jiachang Zhuang , Yangmei Xin , Chenxi Wang , Qiqing Li , Dan Yang , Haizhong Zhang , Xiaoqiang Lu , Minmin Zhu

The ultrawide-bandgap semiconductor Ga₂O₃, characterized by its high breakdown voltage, demonstrates significant potential for applications in optoelectronics and photonics. In this study, we propose a cost-effective strategy for the scalable production of Al-doped Ga₂O₃ via post-growth thermal annealing. Our results demonstrate that the binary β-Ga₂O₃ films are first alloyed into ternary (

\bar{2}

01) β-(Al_xGa_1-x)₂O₃ alloys with tunable compositions under optimized annealing conditions, ultimately forming β-(Al_xGa_1-x)₂O₃/Al₂O₃ heterostructures. Specifically, through X-ray diffraction (XRD) analysis, the Al content of the β-Ga₂O₃ template samples without annealing and annealed up to 1300 °C ranges from 0 to 0.598, with the optical bandgap tunable from 5.01 eV to 6.30 eV. Moreover, the resulting ultraviolet photodetectors based on these composites exhibit enhanced photoresponse performance, with a low dark current of 16.6 fA, a maximum on/off current ratio of 4.53 × 10⁶, and a remarkable responsivity of 5.48 A/W. This study provides a straightforward and efficient approach for tailoring the bandgap of β-(Al_xGa_1-x)₂O₃ films for deep-ultraviolet optoelectronic applications.

超宽带隙半导体Ga2O3具有高击穿电压的特点，在光电子学和光子学领域具有重要的应用潜力。在这项研究中，我们提出了一种经济有效的策略，通过生长后热退火可扩展生产al掺杂Ga2O3。结果表明，在优化的退火条件下，二元β- ga2o3薄膜首先被合金化成成分可调的三元（2¯01）β-(AlxGa1-x)2O3合金，最终形成β-(AlxGa1-x)2O3/Al2O3异质结构。具体而言，通过x射线衍射（XRD）分析，未经退火和退火至1300℃的β-Ga2O3模板样品的Al含量在0 ~ 0.598之间，光学带隙在5.01 ~ 6.30 eV之间可调。此外，基于这些复合材料的紫外光电探测器具有较好的光响应性能，暗电流低至16.6 fA，最大通断电流比为4.53 × 106，响应率为5.48 a /W。该研究为深紫外光电应用中β-(AlxGa1-x)2O3薄膜的带隙定制提供了一种简单有效的方法。

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引用次数: 0

Refractive index, its chromatic dispersion, and thermal coefficients of four less common glycols 四种不太常见的二醇的折射率、色散和热系数

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-01-10 DOI: 10.1016/j.optmat.2026.117874

Anastasiya Derkachova , Daniel Jakubczyk , Gennadiy Derkachov , Kwasi Nyandey

We report comprehensive measurements of the refractive index as a function of wavelength and temperature for four less commonly studied glycols: pentaethylene glycol, hexaethylene glycol, dipropylene glycol (mixture of isomers), and tripropylene glycol. The measurements cover the spectral range of 0.39–1.07 μm and temperatures from 1°C to 45°C. The data were modeled using a two-pole Sellmeier equation, with temperature dependence expressed through wavelength-dependent thermal coefficients. Four fitting models (Sellmeier and Cauchy) with different numbers of parameters were tested; for pentaethylene glycol, results from all models are shown, while for the remaining glycols, only the two-pole Sellmeier fits are presented in tabulated form. Thermal coefficient values for six wavelengths of practical importance are also tabulated. Experimental uncertainties in refractive index, wavelength, and temperature were rigorously evaluated and incorporated into the analysis. The influence of sample purity – including residual water content and manufacturer-reported impurities – was assessed and accounted for in the uncertainty estimates. To our knowledge, this is the first dataset to systematically characterize both chromatic dispersion and thermal variation of the refractive index for these glycols over such a broad spectral and temperature range. The validated fitting equations and parameters are suitable for use in optical modeling, materials characterization, and related applications. All raw data are available in a publicly accessible repository.

我们报告了四种不太常见的乙二醇的折射率作为波长和温度的函数的综合测量：五乙二醇、六乙二醇、二丙二醇（异构体的混合物）和三丙二醇。测量光谱范围为0.39-1.07 μm，温度范围为1°C至45°C。数据使用两极Sellmeier方程建模，通过波长相关热系数表示温度依赖性。对4种参数数不同的拟合模型（Sellmeier和Cauchy）进行了检验；对于五乙二醇，显示了所有模型的结果，而对于其余的乙二醇，只有两极Sellmeier拟合以表格形式呈现。还列出了六个实际重要波长的热系数值。在折射率，波长和温度的实验不确定度进行了严格的评估，并纳入分析。样品纯度的影响——包括残余水含量和制造商报告的杂质——在不确定度估计中进行了评估和考虑。据我们所知，这是第一个系统地描述这些乙二醇在如此宽的光谱和温度范围内的色散和折射率的热变化的数据集。经过验证的拟合方程和参数适用于光学建模、材料表征和相关应用。所有原始数据都在一个可公开访问的存储库中。

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引用次数: 0

Exploring donor-acceptor derivatives of quinoxaline-6-carbonitrile a strategy for efficient orange OLEDs via tunable photophysical properties 探索喹诺啉-6-碳腈的供体-受体衍生物：利用可调光物理性质制备高效橙色有机发光二极管的策略

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-01-10 DOI: 10.1016/j.optmat.2026.117857

Lukas Dvylys , Rasa Keruckiene , Matas Guzauskas , Karolis Leitonas , Rita Sadzeviciene , Linas Labanauskas , Juozas V. Grazulevicius

A systematic molecular design strategy was employed to synthesize four novel cyano-substituted quinoxaline donor–acceptor (D-A) derivatives via a two-step condensation and Buchwald–Hartwig coupling route, aiming to develop efficient thermally activated delayed fluorescence (TADF) emitters. The design combines two weak electron-withdrawing moieties, quinoxaline and cyano, into a strong π-accepting quinoxaline-6-carbonitrile unit, coupled with different electron donors, phenothiazine, phenoxazine, dimethylacridan, and carbazole, to study the influence of donor strength on molecular and photophysical properties. Quantum chemical calculations revealed twisted D-A conformations and separated frontier orbitals, resulting in small singlet–triplet energy gaps (0.02–0.04 eV) and favourable spin–orbit coupling, conducive to TADF. Time-resolved photoluminescence confirmed prompt and delayed fluorescence components, consistent with efficient triplet harvesting. Among the series, the dimethylacridan-based quinoxaline-6-carbonitrile derivative exhibited the smallest energy gap and strongest charge-transfer character. OLEDs fabricated via vacuum deposition achieved a maximum external quantum efficiency of 3.91 % with negligible efficiency roll-off, demonstrating that dual electron-withdrawing design effectively stabilizes the charge-transfer state and enhances device performance.

采用系统的分子设计策略，通过两步缩合和Buchwald-Hartwig偶联途径合成了四种新型的氰基取代喹诺啉给受体（D-A）衍生物，旨在开发高效的热激活延迟荧光（TADF）发射体。本设计将两个弱吸电子基团喹诺啉和氰基组合成强吸π的喹诺啉-6-碳腈单元，并与不同的电子给体吩噻嗪、吩恶嗪、二甲基吖啶丹和咔唑偶联，研究给体强度对分子和光物理性质的影响。量子化学计算揭示了扭曲的D-A构象和分离的前沿轨道，导致小的单重态-三重态能隙（0.02-0.04 eV）和有利的自旋轨道耦合，有利于TADF。时间分辨光致发光证实了提示和延迟荧光成分，符合有效的三重态收获。其中，以二甲基吖啶丹为基础的喹草啉-6-碳腈衍生物具有最小的能隙和最强的电荷转移特性。通过真空沉积制备的oled的最大外量子效率为3.91%，效率滚降可以忽略不计，这表明双吸电子设计有效地稳定了电荷转移状态并提高了器件性能。

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引用次数: 0

Influence of gold microbump array size on the hybrid lattice plasmon resonance quality 金微凸包阵列尺寸对杂化晶格等离子体共振质量的影响

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-01-10 DOI: 10.1016/j.optmat.2026.117873

Rodrigas Liudvinavičius, Evaldas Stankevičius

In recent years, plasmonics has gained significant attention due to its potential in various applications, such as surface-enhanced Raman spectroscopy, nanophotonics, and sensing technologies. This growing interest is driven by recent progress in direct laser writing, which overcomes lithography-based techniques and offers the creation of large-scale plasmonic structures. However, the production of high-scale plasmonic arrays does not always ensure a high plasmonic resonance signal. This study investigates the influence of array size on the optical plasmonic response of gold microbump arrays fabricated using the direct laser writing technique. Additionally, it examines the role of beam-limiting apertures in measuring the optical properties of gold bumps arrays. The results provide insights into optimizing the fabrication process of plasmonic arrays, enabling a reduction in production time while preserving the quality factor of plasmonic resonances. These findings have practical implications in sensing applications, paving the way for efficient and high-performance plasmonic technologies.

近年来，等离子体动力学由于其在表面增强拉曼光谱、纳米光子学和传感技术等方面的应用潜力而受到广泛关注。这种日益增长的兴趣是由直接激光书写的最新进展所驱动的，它克服了基于平版印刷的技术，并提供了大规模等离子体结构的创建。然而，大规模等离子体阵列的生产并不总是保证高等离子体共振信号。本文研究了阵列尺寸对激光直接写入技术制备的金微凸点阵列光等离子体响应的影响。此外，本文还研究了限束孔径在测量金凸点阵列光学特性中的作用。该结果为优化等离子体阵列的制造工艺提供了见解，能够在保持等离子体共振质量因子的同时减少生产时间。这些发现在传感应用中具有实际意义，为高效和高性能等离子体技术铺平了道路。

引用次数: 0

Synthesis, characterization, and enhanced nonlinear optical properties of octyloxy-substituted azo-imine copper(II) complex: Experimental and theoretical studies 辛氧基取代偶氮亚胺铜（II）配合物的合成、表征和增强非线性光学性能：实验和理论研究

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-01-09 DOI: 10.1016/j.optmat.2026.117859

Md. Mohon Shek , Md. Shakil Hossen , Md. Murshidul Islam , Shofiur Rahman , Abdullah N. Alodhay , Ennio Zangrando , Md Chanmiya Sheikh , Ryuta Miyatake , Md. Monirul Islam , Md. Rabiul Karim

A novel azo Schiff base ligand 5-((E)-(4-(octyloxy)phenyl)diazenyl)-2-((E)-((4-(octyloxy)phenyl)imino)methyl)phenol (HL) and its Cu(II) complex [CuL₂] were synthesized and characterized to evaluate their structural and nonlinear optical (NLO) properties. Single-crystal X-ray diffraction showed a distorted square-planar geometry around the Cu(II) ion. Spectroscopic analyses (FTIR, UV–Vis, NMR) confirmed the formation of the complex, while thermogravimetric analysis demonstrated remarkable thermal endurance. Complexation significantly reduced the HOMO–LUMO gap, facilitating stronger intramolecular charge transfer (ICT). Density Functional Theory (DFT) calculations agreed with experimental results, which demonstrated a sharp reduction in the HOMO–LUMO gap upon complexation (3.23 eV in HL to 0.14 eV in [CuL₂]), favoring intramolecular charge transfer (ICT). The [CuL₂] complex shows a first-order hyperpolarizability (β_total) of 6451.87 a.u., nearly 15 times greater than that of urea, underscoring its strong potential for high-performance NLO applications. Overall, the findings establish that the [CuL₂] complex combines structural stability, along with enhanced electronic and NLO characteristics, making it a promising candidate for future photonic and optoelectronic applications.

合成了一种新型偶氮希夫碱配体5-(（E)-（4-（辛氧基）苯基）二氮基）-2-（（E)-（4-（辛氧基）苯基）亚氨基）甲基）苯酚（HL）及其Cu（II）配合物[CuL2]，并对其结构和非线性光学性质进行了表征。单晶x射线衍射显示Cu（II）离子周围呈扭曲的方平面几何形状。光谱分析（FTIR, UV-Vis， NMR）证实了配合物的形成，而热重分析显示了显著的热耐力。络合作用显著减小了HOMO-LUMO间隙，促进了更强的分子内电荷转移（ICT）。密度泛函理论（DFT）计算结果与实验结果一致，实验结果表明，配合后HOMO-LUMO间隙急剧减小（HL为3.23 eV， [CuL2]为0.14 eV），有利于分子内电荷转移（ICT）。[CuL2]配合物的一阶超极化率（β总）为6451.87 a.u.，是尿素的近15倍，显示出其在高性能NLO应用方面的强大潜力。总的来说，研究结果表明，[CuL2]配合物结合了结构稳定性，以及增强的电子和NLO特性，使其成为未来光子和光电子应用的有希望的候选者。

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引用次数: 0

Efficient and Stable Broadband Gd3Ga5O12: Cr3+ garnet phosphor for NIR LED applications 用于近红外LED应用的高效稳定宽带Gd3Ga5O12: Cr3+石榴石荧光粉

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-01-09 DOI: 10.1016/j.optmat.2026.117855

Junhao Li , Jing Li , Yaru Peng , Shuai Liao , Heping zhao , Xi Chen , Liangliang Zhang , Li Chen

Near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) have Wide-ranging application prospects in fields such as night vision lighting, food detection, fluorescence labeling, and biological imaging. However, there is currently a lack of highly efficient phosphors covering the 700–1100 nm spectral range, and challenges remain in improving the efficiency and thermal stability. In this work, the Gd₃Ga₅O₁₂: Cr³⁺ garnet phosphor was successfully synthesized, which exhibits good thermal stability (I_180°C/I_30°C = 93 %). When current was 10 mA, the fabricated pc-LED demonstrated an impressive photoelectric conversion efficiency reaching 28.11 %. After incorporating Yb³⁺, the emission wavelength range was broadened by 200 nm. The Gd₃Ga₅O₁₂: Cr³⁺, Yb³⁺ phosphor achieved zero thermal quenching at 180 °C, and the corresponding pc-LED still maintained an excellent photoelectric efficiency of 25.86 % at 10 mA. The Gd₃Ga₅O₁₂: 0.1Cr³⁺, 0.02 Yb³⁺ is an broad emission band, high conversion efficiency, and outstanding thermal stability NIR phosphor with high potential for compact high-power NIR pc-LEDs.

近红外磷光转换发光二极管（NIR pc- led）在夜视照明、食品检测、荧光标记、生物成像等领域有着广泛的应用前景。然而，目前缺乏覆盖700 - 1100nm光谱范围的高效荧光粉，并且在提高效率和热稳定性方面仍然存在挑战。本文成功合成了Gd3Ga5O12: Cr3+石榴石荧光粉，具有良好的热稳定性（I180°C/I30°C = 93%）。当电流为10 mA时，pc-LED显示出令人印象深刻的光电转换效率，达到28.11%。加入Yb3+后，发射波长范围扩大了200 nm。Gd3Ga5O12: Cr3+， Yb3+荧光粉在180℃下实现零热猝灭，对应的pc-LED在10 mA时仍保持25.86%的优异光电效率。Gd3Ga5O12: 0.1Cr3+， 0.02 Yb3+是一种宽发射带、高转换效率和出色热稳定性的近红外荧光粉，具有高潜力用于紧凑的高功率近红外pc- led。

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引用次数: 0

Designing coumarin–benzoic acid-based novel binary liquid for optical limiting and liquid-core optical fiber fillers 设计以香豆素-苯甲酸为基的新型二元限光液和液芯光纤填料

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-01-09 DOI: 10.1016/j.optmat.2026.117870

Shradha Lakhera , Meenakshi Rana , A. Dhanusha , T.C. Sabari Girisun , Shruti Sharma , Papia Chowdhury

A novel nonlinear optical liquid was introduced by combining para-aminobenzoic acid (PABA) and 7-diethylamino-4-methylcoumarin (7DMC) and tested for its optical limiting characteristics. Seven different combinations of varying concentrations of PABA and 7DMC had been synthesized. The absorption spectra of these samples were obtained in a wavelength range of 300 and 420 nm, with a peak wavelength higher than that in the case of individual PABA and 7DMC. The band gap of the combinations was lower than compared of the probe compounds. A single broad photoluminescence spectrum supported the formation of intermolecular electrostatic bonding between PABA and 7DMC. The photoluminescence and vibrational spectra confirmed that there was no vacancy, defect, or foreign compound formed in the combination. The Z-Scan spectra gave a valley about the origin for all the combinations, indicating the occurrence of the reverse saturable absorption. The designed liquid can be proven to be of great importance in optical liquids and liquid optical fibres.

介绍了一种由对氨基苯甲酸（PABA）和7-二乙胺-4-甲基香豆素（7DMC）组成的非线性光学液体，并对其光限特性进行了测试。合成了7种不同浓度的PABA和7DMC的不同组合。分别在300和420 nm波长范围内获得了样品的吸收光谱，其峰值波长高于单个PABA和7DMC的吸收光谱。与探针化合物相比，这些化合物的带隙更小。单宽光致发光光谱支持PABA与7DMC分子间静电键的形成。光致发光和振动光谱证实，在该组合中没有空位、缺陷或形成外来化合物。z扫描光谱给出了所有组合的原点附近的一个谷，表明发生了反向饱和吸收。所设计的液体在光学液体和液体光纤中具有重要的意义。

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引用次数: 0

Study on hydrothermal synthesis and photocatalytic performance of CuS/Na2Ti3O7 heterojunction cu /Na2Ti3O7异质结水热合成及光催化性能研究

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials

Pub Date : 2026-01-09 DOI: 10.1016/j.optmat.2026.117867

Cuicui Wang , Chuanli Zhang , Anqi Cai , Zhizun Yue , Hongxia Ren , Shuxian Dong , Haoyu Li , Hairong Yin , Yuanting Wu

Developing highly efficient visible-light-responsive photocatalysts represents a central challenge in the field of environmental remediation. In this study, a CuS/Na₂Ti₃O₇ (NTO) heterojunction was constructed in situ on a titanium substrate via a facile hydrothermal method. Systematic characterizations (including XRD, SEM/TEM, XPS, UV–Vis DRS, PL, EPR, etc.) revealed that the heterojunction not only broadens the visible-light absorption range but also, due to its optimized band alignment, significantly suppresses the recombination of photogenerated electron–hole pairs, thereby enhancing interfacial charge transfer efficiency. Performance evaluation confirmed that CuS/NTO achieves a degradation rate of 83 % for methylene blue (MB) under visible-light irradiation. This pronounced photocatalytic activity further endows the material with excellent antibacterial properties, exhibiting inactivation rates of 99.9 % and 90 % against Escherichia coli and Staphylococcus aureus, respectively. This work not only elucidates a preparation strategy for high-performance heterojunction photocatalysts, but also deepens the understanding of charge transfer pathways through mechanistic analysis, offering clear guidance for designing novel photocatalytic materials applicable to wastewater treatment and self-cleaning surfaces.

开发高效的可见光响应光催化剂是环境修复领域的核心挑战。本研究采用水热法在钛基板上原位构建了cu /Na2Ti3O7 （NTO）异质结。系统表征（包括XRD， SEM/TEM， XPS, UV-Vis DRS， PL， EPR等）表明，异质结不仅拓宽了可见光吸收范围，而且由于其优化的能带排列，显著抑制了光生电子-空穴对的重组，从而提高了界面电荷转移效率。性能评价证实，在可见光照射下，cu /NTO对亚甲基蓝（MB）的降解率达到83%。这种明显的光催化活性进一步赋予了材料优异的抗菌性能，对大肠杆菌和金黄色葡萄球菌的灭活率分别为99.9%和90%。这项工作不仅阐明了高性能异质结光催化剂的制备策略，而且通过机理分析加深了对电荷转移途径的理解，为设计适用于废水处理和自清洁表面的新型光催化材料提供了明确的指导。

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引用次数: 0