SEPARATION AND PURIFICATION TECHNOLOGY
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2026
·
IF 9.1
Dongcheng Li,Shenghu Wang,Huanji Song,Xianying Xu,Shihao Yang,Yuyang Dong,Yan Luo,Weiyang Lv
Efficient and sustainable Fenton-like systems are highly desired for degrading persistent pollutants. However, their development is often hindered by the slow redox kinetics and poor durability of single active sites in conventional metal-based catalysts. Herein, we developed a bimetallic Fe/Cu catalyst (FeCu-BN) with highly dispersed metal sites anchored on boron nitride (BN), which offered boosted activity and stability via the cooperative redox cycles between Fe and Cu sites. The FeCu-BN catalyst achieved nearly 100% removal of sulfamethoxazole (SMX) within 20 min through activating peroxymonosulfate (PMS), with a rate constant of 0.421 min − 1 significantly surpassing those of its monometallic counterparts and other advanced catalysts. Systematic experiments and theoretical calculations revealed that the Cu sites not only optimized the electronic structure of the Fe sites but also provided electrons extracted from pollutants to promote the Fe 2+ /Fe 3+ cycle, thereby triggering concerted radical and non-radical reactions for SMX elimination. Consequently, the FeCu-BN/PMS catalytic system operated stably over a wide pH range and exhibited exceptional tolerance to various inorganic ions and complex aqueous matrices. Furthermore, in a continuous flow membrane reactor, the system maintained efficient SMX removal over 20 h without significant performance loss. This work uncovered the synergistic redox cycling mechanism in bimetallic catalysts and offered valuable insights for designing dual-site catalysts for environmental remediation.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Yusen Xing,Rugeng Liu,Mei Li,Wei Han
To lower the reaction temperature and enhance the waste incorporation rate of ZrSiO 4 , this study developed a novel low-temperature synthesis strategy. MgF 2 was used as a mineralizer to optimize the synthesis of ZrSiO 4 . Ceramics are successfully prepared by sintering at 1000 °C for 6 h. The role of MgF 2 in promoting the reaction is also investigated. At 1000 °C, MgF 2 reacts with SiO 2 to form amorphous Mg 2 SiO 4 . The Mg 2 + ions released in this process promote the phase transformation from m-ZrO 2 to t-ZrO 2 . The t-ZrO 2 then reacts with SiO 4 4- , thereby forming ZrSiO 4 . Under the same conditions, Nd x Zr (1-x) SiO 4 ceramic waste forms are synthesized for the immobilization of Nd 2 O 3 , which simulates high-level radioactive waste. XRD results show that a single-phase zircon structure is maintained when x ≤ 0.35. However, when x > 0.35, a small amount of Mg 2 SiO 4 is detected as a secondary phase. This indicates that some SiO 2 remains unreacted, and part of the Nd 2 O 3 is not incorporated into the crystal structure. Based on these findings, the sample with the maximum solid solution (x = 0.35) is selected and combined with lead-containing borosilicate glass to produce glass-ceramic waste forms. Leaching tests show that the normalized release rate of Nd 3+ gradually decreases as the glass content increases. With a glass content of 90 wt%, the material exhibits outstanding aqueous durability, as evidenced by a negligible Nd 3+ leaching rate of merely 1.57 × 10 −6 g·m −2 ·d −1 after 2 8 days. In conclusion, MgF 2 acts as an effective mineralizer, enabling a substantial reduction in both the synthesis temperature and duration required for ZrSiO 4 formation.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Xiaoyu Zhang,Langping Dong,Shaoxing Yang,Qiuyu Yao,Baiqi Shao,Jingshan Hou,Yongzheng Fang
To creating versatile light-emitting materials that enable diverse functionalities, a Mn 4+ -activated La 2 MgNbO 6.5 multifunctional phosphor that exhibits excellent comprehensive performance for applications in plant lighting and optical thermometry was synthesized. The crystal structure and luminescent characteristics were systematically analyzed. The synthesized La 2 MgNbO 6.5 :Mn 4+ shows a broadband excitation band spanning 300-500 nm and delivers far-red emission centered near 708 nm, which overlaps with the P FR phytochrome absorption of plants. Furthermore, the enhancement effect of alkali-metal ions on the performance of La 2 MgNbO 6.5 :Mn 4+ has been investigated. The optimized La 2 MgNb 0.994 O 6.5 :0.006Mn 4+ , 0.003Li + phosphor exhibits remarkable improvements in photoluminescence intensity, external quantum efficiency and thermal stability. Its external quantum efficiency reaches an impressive 50.3%, fully meeting the demands of practical applications. An LED device was fabricated by integrating the optimized La 2 MgNb 0.994 O 6.5 :0.006Mn 4+ , 0.003Li + far-red phosphor with a 410 nm chip. Wheat-seedling cultivation under its illumination demonstrated markedly enhanced stem growth, further validating the phosphor's potential as a far-red-emitting material for indoor plant-growth LED lighting. Meanwhile, the excellent temperature-dependent luminescence behavior of the phosphor also renders it promising for optical thermometry. Its nearly linear response trend enables potential practical applications, yielding a high relative sensitivity of up to 3.3656%·K −1 , and a minimum temperature uncertainty as low as 0.0165 K. The results demonstrate that the Mn 4+ -activated La 2 MgNbO 6.5 multifunctional phosphor possesses broad application prospects in both plant lighting and optical thermometry.
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Laser & Photonics Reviews
·
2026
·
IF 10
Mingkai Wei,Yanjun Hao,Xuejie Zhang,Wei Li,Haoran Zhang,Bingfu Lei
Near-infrared (NIR) phosphor-converted LEDs (pc-LEDs) are critical for smart agriculture and night vision, but their efficiency is limited by low external quantum efficiency (EQE) of phosphors. Herein, the introduction of Al 3+ ions via chemical substitution increased the EQE of the GdGa 2.85 (BO 3 ) 4 :0.15Cr 3+ NIR phosphor from 8.3% to 30.7% (a relative increase of 270%). Importantly, an “absorption-efficiency decoupling” paradigm is identified: while the Al 3+ substitution reduces the absorbance, confirmed by Density Functional Theory, diffuse reflectance spectra, and X-ray photoelectron spectroscopy, the quantum efficiency is significantly increased. Theoretical analyses and spectroscopic evidence suggest that the superior EQE gain stems from Al 3+ -induced crystal field enhancement and subsequent energy level remodeling. This remodeling optimizes the Cr 3+ excited state dynamics by suppressing the non-radiative transitions pathway and increasing the radiative transitions, thus overcoming the detrimental effects of absorption reduction. The optimized phosphor, combined with a blue LED chip, produced an NIR pc-LED achieving 41.7 mW output power and 15.7% photoelectric efficiency at 100 mA. The device successfully demonstrated potential for precision agriculture and night vision. This work provides novel insight into “absorption-efficiency decoupling” and offers a new design strategy for efficient Cr 3+ -doped NIR phosphors.
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Small
·
2026
·
IF 12.1
Zhanmo Zheng,Conglin Dong,Xiuqin Bai,Chengqing Yuan,Tun Cai,Yiwei Wang,Pengfei Jing
Achieving durable lubrication and effective damping, which are essential for suppressing friction-induced vibration and noise, remains a challenge in water-lubricated polymer friction components. In this study, a slippery multi-crosslinked polyvinyl alcohol (PVA) hydrogel (MCPH) was proposed based on PVA as the hydrogel matrix, carboxylated cellulose nanofibers as reinforcing agents, and various reversible interactions as efficient energy dissipation mechanisms. Subsequently, the prepared MCPH was blended with thermoplastic polyurethane (TPU), and a novel TPU/MCPH composite was developed. Friction and vibration experiments demonstrated that the incorporation of MCPH significantly enhanced the aqueous lubrication of the TPU composite, which was attributable to the synergistic effects of the improved hydrophilicity, water absorption/release functions of MCPH, and hydration lubrication. Moreover, the reversible interactions within MCPH were continuously disrupted and rapidly reconstructed under frictional shear stress, enabling efficient mechanical energy dissipation and enhancing the damping capacity of the TPU/MCPH composite. Consequently, under the synergistic effects of improved lubrication and enhanced damping capacity, the modified TPU composite exhibited a low coefficient of friction of 0.109 under aqueous conditions and a substantial reduction in vibration and noise responses. This innovative composite provides a promising strategy for developing high-performance polymer friction materials with superior lubricity and vibration-noise suppression under aqueous environments.
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ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19
Shaobo Yang,Chaochao Cao,Junke Cui,Jianguo Zhang,Song Yan,Yaxin Gu,Zihao Wang,Xinran Li,Jingwen Yang,Yanming Xue,Chengchun Tang
Hexagonal boron nitride ( h -BN) ceramics are attractive candidates for both structural and functional applications. However, the challenges in their inadequate deformability and inherent brittleness have not been significantly addressed. Herein, a type of h -BN ceramics (M2B-700-1300) with combined superior strength and toughness is fabricated via pre-pyrolysis, pressure molding, and high-temperature sintering in sequence. The key to the proposed strategy lies in proactively completing the intense gas-phase reaction of the precursor during the pre-pyrolysis stage, thereby forming a homogeneous boron oxynitride intermediate phase and then effectively alleviating structural collapse and pore defects during high-temperature sintering. The resulting ceramics, with densely stacked nanosheets framework bond-bridged by amorphous boron oxynitride structure, exhibit robust compressive strength of 439.2 MPa and large deformation of 10.18%. Impressively, it is as high as 5-8 times that of general h -BN ceramics in stress, and far exceeds 4% of traditional ceramics for strain, respectively. The successful synthesis of h -BN bulk ceramics with both superior strength and toughness provides potential opportunities for fabrication of other high deformability ceramics.
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CHEMISTRY OF MATERIALS
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2026
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IF 7
Junlin Cai,Pengfei Li,Hongpu Huang,Shupeng Wang,Yu Peng,Yuhang Peng,Qiuxiang Wang,Xiaohong Wang,Zhaoxiong Xie,Shuifen Xie
Defect-rich RuO2 catalysts, although possessing high electrocatalytic activity, are inherently unstable for the anode oxygen evolution reaction (OER) in proton exchange membrane water electrolysis (PEMWE) due to rapid lattice oxygen depletion. Here we report an atomically Ir-doped, grain-boundary-rich RuO2 catalyst (Ir-GB-RuO2) that suppresses overactivation of lattice oxygen by forming robust Ru–O–Ir bridging motifs at grain boundaries, achieving high-performance acidic OER electrocatalysis and ampere-level stable PEMWE. The induced electronic modulation shifts the catalytic mechanism from a pure lattice oxygen mechanism (LOM) to a balanced coexistence of LOM and the adsorbate evolution mechanism (AEM), thereby achieving robust stability while preserving high intrinsic activity. The primary Ir-GB-RuO2 catalyst requires only 191 mV overpotential to achieve 10 mA cm–2 and exhibits a prolonged durability exceeding 1000 h at 100 mA cm–2. In a PEM electrolyzer, it attains the current density of 1.0 A cm–2 at a notably low cell voltage (1.67 V) and exhibits a minimal potential decay rate of only 55.3 μV h–1 over 1500 h of continuous operation. This work overcomes the intrinsic activity–stability trade-off in defect-rich Ru-based catalysts for industrial PEMWE.
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INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Kaitong Liu,Yuan Rao,Zhaoxue Li,Shihang Zhou,Zhi-Zhong Zhang,Yanhui Zhang
The edge-sharing connection mode of [BO4] tetrahedra has greatly enriched the structural chemistry of borates, which provides more options and possibilities for designing more materials with unique structures and excellent performance. A zinc borate Ba5Zn4(B3O6)2(B12O24) (BaZnBO) was synthesized via a high-temperature solid reaction. Its uniqueness lies in not only introducing Zn into the structure of β-BaB2O4 but also containing the unusual edge-sharing [BO4] tetrahedra. The functional building units are isolated [B3O6] and [B12O24] groups. The adjacent [B3O6] groups are linked to a layer in the ab plane and further stack along the [001] direction, while the [B12O24] groups are located in the middle of these layers, thus forming the “sandwich” structure. This work also analyzed the impact of introducing Zn into β-BaB2O4 on the structure of anions. In addition, BaZnBO also exhibits good thermal stability and excellent optical properties including the short cut-off edge (204 nm) and suitable birefringence (0.058@1064 nm).
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ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.3
Mingyang Hu,Ying He,Yunying Wang,Hongzhi Du,Liang Wang,Jie Yang,Yun Liu
The methanolysis of polyethylene terephthalate (PET) to produce dimethyl terephthalate (DMT) and ethylene glycol (EG) is a promising route for sustainable PET valorization. Conventional metal-based catalysts often suffer from high cost, large loading, low processing capacity, and environmental concerns. Here, we report a nitrogen–sulfur codoped lignin-derived carbon catalyst (S–N@C-800 °C) for oxidative alcoholysis of PET. Under 180 °C and 30 min with a PET-to-catalyst ratio of 250:1, PET conversion reached 99.58%, with EG and DMT yields of 97.67 and 95.37%, respectively. Even at a 600:1 ratio (0.16% catalyst by mass), the system maintained high depolymerization efficiency, highlighting its performance under low catalyst usage and high solid loading. Characterization revealed strong correlations among activity, acid–base sites, nitrogen species, and vacancies. Mechanistic studies using electron paramagnetic resonance (EPR) and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) showed that basic sites activate O2 to generate superoxide (·O2–), which reacts with methanol to form OOH· and CH3O-, while acidic sites activate carbonyl groups, forming carbocations that lower ester bond dissociation energy and facilitate nucleophilic attack. This metal-free, efficient, and environmentally benign catalytic system provides a practical strategy for PET recycling.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 46
·期 9
·118237
·
IF 6.3
Can Jin,Danyang Shen,Youjie Hua,Lei Gu,Guanbo Yao,Hongping Ma,Chenxia Li,Degang Deng,Renguang Ye,Shiqing Xu
Ceramic-composite phosphor-in-glass films (PiGFs) are excellent candidates for high-power and stable Laser-driven (LD) lighting due to their excellent thermal management. However, the high temperatures in existing PiGF in-situ crystallization processes can damage the phosphor structure, limiting their development for high color rendering index (Ra) applications. In this study, a novel ceramic-composite tricolor PiGF system is co-sintered at a low temperature of 600 °C using a ZnO-Li 2 O-SiO 2 (ZLS) sintering matrix and incorporates β-Zn 2 SiO 4 glass-ceramic as a functional phase. This process achieves enhanced light scattering and thermal management while preserving the integrity of the tricolor phosphors. Through process optimization, the PiGF achieved bright white light with a luminous flux (LF) of 1361 lm @7.08 W and an Ra of 84.5. Finally, the PiGF was assembled into a laser lighting prototype, exhibiting an optimal balance between luminous intensity and color quality, rendering this color converter highly promising for high-quality laser lighting applications.
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Talanta Open
·
2026
·
IF 5.1
Chenyang Ding,Yuanhang Wang,Yong Zheng,Jiashan Lu,Guiqiu Wang,Xuhui Geng
To achieve rapid and efficient detection of algal cells, this study developed a high-sensitivity laser-induced fluorescence detector with dimensions of 14 × 5.7 × 2.8 cm 3 . Microalgae were analyzed using a combination of laser-induced fluorescence and capillary electrophoresis. During capillary electrophoresis separation, differences in the composition and content of cellular components among various algal species resulted in characteristic peak shapes and heights in the electrophoresis patterns. Experimental results demonstrated that this method obtained characteristic electrophoresis profiles for different algae and enabled effective differentiation of microalgal species based on their peak shapes. The detector exhibits a chlorophyll a detection limit as low as 40 pM. This exceptional sensitivity enables single-cell analysis, allowing detection even when cellular contents are diluted by factors over 3.5 × 10 3 . This study developed a miniaturized and highly sensitive laser-induced fluorescence detector, based on which the analytical method established provides a powerful new tool for the rapid identification and single-cell analysis of algae.
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Reaction Kinetics Mechanisms and Catalysis
·
2026
·
IF 2.1
Hu Yanan,Yang Dawei,Li Qiaoling,Yu Chengcheng
Herein, a Cr-doped Ni-Cu/(NiOH) 2 coating supported on nickel foam (Ni-Cu-Cr/NF) was fabricated via a facile one-step electrodeposition strategy and employed as an efficient electrocatalyst for the hydrogen evolution reaction (HER) in alkaline media. In 1 M NaOH, Ni–Cu–Cr/NF requires an overpotential of 30 mV to reach a current density of − 10 mA cm⁻ 2 and exhibits a Tafel slope of 55 mV dec⁻ 1 . These electrochemical results are associated with the combined effects of the multicomponent composition and an increased electrochemically active surface area (ECSA). The ECSA of Ni–Cu–Cr/NF is approximately 23.6 times that of Ni–Cu/NF. In addition, the catalyst maintains stable operation for 60 h during continuous electrolysis. This work presents a simple preparation method for the novel Ni-Cu-Cr/NF catalyst and systematically investigates the impact of Cr doping on enhancing catalytic performance, providing an effective strategy for the development of nickel-based alloy electrocatalysts. Graphical
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