CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Kangliang Peng,Huiqing Xu,Xueqing Yang,Lin Chen,Lifang Chen
The exploitation of phosphors with tunable color emissions is of great significance in the field of display and lighting. Herein, a series of Eu 3+ /Dy 3+ /Eu 2+ ions single-/multiple-doped NaMgPO 4 phosphors have been successfully synthesized via a high-temperature solid-state reaction method. The luminescence properties of the synthesized NaMgPO 4 phosphors were systematically investigated. The incorporation of Dy 3+ enables the tuning of emission peaks in NaMgPO 4 :Eu 3+ phosphors through an efficient energy transfer (ET) process from Eu 3+ to Dy 3+ , thereby facilitating white light emission in a single-composition phosphor. Eu 3+ and Eu 2+ co-activated NaMgPO 4 phosphors were achieved by controlling the reduction of Eu 3+ to Eu 2+ under a reducing atmosphere generated by activated carbon. Photoluminescence (PL) spectra revealed simultaneous blue emission from Eu 2+ and red emission from Eu 3+ . By varying the amount of activated carbon, tunable emission colors can be realized in the Eu 3+ /Eu 2+ codoped NaMgPO 4 phosphors. Consequently, through the strategic design of rare-earth ion codoping, the Eu 3+ /Dy 3+ /Eu 2+ ions single-/multiple-doped NaMgPO 4 phosphors exhibit promising practical applications in phosphor-converted white light-emitting diodes (LEDs).
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ACS Applied Energy Materials
·
2025
·
IF 5.5
Liru Yan,Shishuai Sun,Shuangting Ruan,Xiaocheng Liu,Huanqi Cao,Shougen Yin
Design of the photosensitive electrode material provides an effective strategy to improve the capacity and stability of supercapacitors. In this study, the photothermal-driven cobalt–zinc-doped Ni(OH)2/g-C3N4@NF nanoflower electrode materials were prepared base on the in situ chemical etching strategy. The electrochemical performance indicated that the optimized CZNC2.18 (cobalt–zinc codoped β-Ni(OH)2@g-C3N4) electrode material with exceptional stability (103.74% capacitance retention after 5000 cycles at 20 mA/cm2) exhibited an ultrahigh capacitance of 19.10 F/cm2 at a current density of 10 mA/cm2 under illumination, compared to 12.8 F/cm2 under dark conditions, achieving a light gain of 149%. The assembled asymmetric photothermal-assisted supercapacitor device delivers energy densities of 3.55 mWh/cm2 (1.23 mWh/cm2) at corresponding power densities of 8.39 mW/cm2 (37.03 mW/cm2) under illumination, surpassing performance metrics observed under dark conditions. The synergistic effects of photogenerated carriers (holes oxidizing Ni(OH)2 to NiOOH and electrons enhancing conductivity), Zn/Co codoping-induced conductivity improvement, and photothermal-assisted ion transport collectively enable CZNC2.18 exceptional photoelectrochemical performance, establishing a paradigm for light-responsive energy storage material design.
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ADVANCED MATERIALS
·
2025
·Vol. 37
·期 41
·e08371
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IF 26.8
Tong Wu,Xingyu Wang,Qin Yang,Bingqing Wang,Ruoou Yang,Shin-An Chen,Lo-Yueh Chang,Sibo Wang,Fuqiang Huang,Ziyun Wang,Yanwei Lum
Low-temperature direct ammonia fuel cells (DAFCs) can be used for the on-demand generation of clean electricity. However, such systems have low efficiency due to the kinetically sluggish ammonia oxidation reaction (AOR) and oxygen reduction reaction (ORR). Prior reports have largely focused on Pt-based electrocatalysts, however, their high cost motivates the need for simultaneously increasing activity whilst reducing the metal loading. Here, the design of a bifunctional Pt single-atom catalyst (SAC) is reported, with enhanced catalytic activities compared to commercial Pt/C for both reactions. Notably, by modulating the Pt SAC coordination, the optimal catalyst (Pt-DG-1) displayed a high AOR mass activity of 1.23 A mg Pt −1 and ORR mass activity of 7.98 A mg Pt −1 . This is then integrated into a DAFC as both the cathode and anode, achieving a peak power density of 21.8 mW cm −2 and low Pt mass loading of only 0.034 mg cm −2 . In situ shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS) experiments on Pt-DG-1 indicate a lower * OH coverage under ORR conditions and suppressed formation of poisoning species * NO x under AOR conditions as additional reasons for its enhanced bifunctional catalytic activity. Importantly, the study demonstrates how SACs can be rationally designed for DAFC electrocatalysis.
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PubMed
高影响因子
Energies
·
2025
·Vol. 18
·期 18
·4854
·
IF 3.2
Kai Wang,Chenye Guo,Qisen Gong,Gen Li,Xiaoyue Zhuo,Peng Zhuo,Chaoxian Chen
To address the challenges of low permeability, high gas adsorption, and a fragile structure in coalbed methane reservoirs, this study developed a high-strength composite proppant with an activated carbon skeleton via nitric acid pretreatment, silica–alumina sol coating, and calcination. Orthogonal experiments optimized the preparation conditions: 30–40 mesh activated carbon, Si/Al molar ratio of 4:1, calcination at 650 °C for 2 h. The resulting proppant exhibited an excellent performance: a single-particle compressive strength of 55.5 N, porosity of 33.2%, crushing rate of only 2.3% under 50 MPa closure pressure, and permeability 48.5% higher than quartz sand. In simulated acidic coalbed environments (pH 3–5), its acid corrosion rate was <2.8%, and it enhanced methane desorption by 16.2% compared to pure coal. Additionally, the proppant showed a superior transport performance in fracturing fluids, with better distribution uniformity in fractures than ceramsite, and its hydrophobic surface (contact angle 115.32°) improved fracturing fluid flowback efficiency. This proppant integrates high strength, good conductivity, gas desorption promotion, and corrosion resistance, offering a novel material solution for efficient coalbed methane extraction.
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JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Dongmei Zhang,Dingrong Long,Jiangping Zhang,Jiaxin Tu,Baoyi wang,Rubing Xu,Kunda Yang,Qianxiao Fan,Wendi Zhang,Lehao Liu,Meicheng Li
Succinonitrile (SN)-based electrolytes have emerged as promising candidates for lithium metal batteries (LMBs) due to their high ionic conductivity and thermal stability. However, the limited mechanical robustness, low reduction resistance, and residual free SN molecules can damage the electrochemical performance of batteries. Herein, an ultrathin (10 μm) yet mechanically robust composite electrolyte is developed by introducing a rigid multifunctional supporting skeleton, fabricated through in situ growth of zeolitic imidazolate framework (ZIF) nanoparticles within a three-dimensional (3D) aramid nanofibers (ANF) network. The rigid supporting skeleton functionalized with ZIF-67 nanoparticles can selectively absorb lithium salt anions to regulate Li + transport. The well-designed composite electrolyte exhibits a high Li + ionic conductivity of 3 × 10 −4 S cm −1 and a Li + transference number of 0.83 at room temperature. Meanwhile, the rigid multifunctional skeleton effectively mitigates side reactions between SN and lithium metal through inducing the formation of the LiF-rich solid electrolyte interphase layer. As a result, the composite electrolyte-based Li||Li, Li||LiFePO 4 and Li||LiNi 0.6 Co 0.2 Mn 0.2 O 2 cells show superior electrochemical performance at room temperature. Notably, the Li||LiFePO 4 cells also deliver stable performance at low temperature. This design offers an efficient, scalable fabrication method for ultrathin solid-state electrolyte-based highly stable and safe LMBs.
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ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Huanran Chen,Jiahong He,Jibin An,Qiang Xu,Zhilin Xing
Sulfamethazine is an antibiotic whose anti-degradability and potential for water pollution have become a threat to water contamination. This study designed a composite cathode of Fe-MOF-525/Ti 3 C 2 to effectively remove SMT through Photoelectro-Fenton (PEF). Characterization and photoelectrochemical test results indicate that Fe-MOF-525/Ti 3 C 2 contains abundant active sites and exhibits excellent catalytic performance for the oxygen reduction reaction (ORR). Tests demonstrated that under optimized conditions, the PEF system achieved a removal rate of 95.6% for SMT and a cumulative H 2 O 2 concentration of 53 mM within 120 minutes. Reactive oxygen species (ROS) capture experiments confirmed that •OH and •O 2 − are the main ROS responsible for the degradation of SMT. Further studies investigated the possible degradation pathways. Overall, this work demonstrates an example of pollution control resulting from the philosophy of green chemistry, which offers a promising pathway to reduce the chemical demand for advanced oxidation processes.
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2025
·
IF 5.7
Sichu Xing,Chundi Zhou,Minghao Sui
This study presented a novel nano zero-valent iron anchored on activated carbon (nZVI@AC) catalyst, designed to overcome the inherent aggregation and oxidation limitations of bare nZVI. The nZVI@AC composite exhibited high catalytic activity for peracetic acid (PAA) activation, achieving complete degradation of sulfamethoxazole (SMX) within 10 min ( k obs = 0.3171 min -1 ). Characterizations confirmed that the AC support significantly enhanced electron transfer and increased the electron-donating capacity. This maximized exposure of active Fe 2+ species, which was crucial for efficient PAA activation and reactive oxygen species (ROS) generation. Radical quenching, electron paramagnetic resonance, and probe experiments identified hydroxyl radicals, singlet oxygen ( 1 O 2 ), and acetylperoxyl radicals as the primary ROS, with 1 O 2 playing the dominant role. The nZVI@AC/PAA system demonstrated remarkable stability and practical viability. This work established nZVI@AC as an efficient, stable, and versatile catalyst for PAA-based advanced oxidation processes, offering promising potential for water remediation applications.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Suili Shi,Haiyang Zhai,Congcong Wang,Zhiliang Jin,Guorong Wang
Bimetallic organic frameworks have attracted substantial interest in the supercapacitor domain owing to their extensive specific surface areas and rich porosity. Nevertheless, their practical performance is constrained by inadequate active surface areas and the limited exposure of active sites. Here, NiCo-BTC-0.5 N was prepared via an in situ solvothermal approach with cyanoguanidine introduced as the nitrogen source, which promoted a high density of Co N bonds and induced substantial interfacial reconstruction. This modified structure contributed to enriching electrochemical active surface area compared to the unmodified NiCo-BTC. Electrochemical tests showed that NiCo-BTC-0.5 N exhibits a specific capacitance of 1840.97 F g −1 when tested at 1 A g −1 . It maintains 75.15 % of its rate performance at 20 A g −1 , demonstrating excellent rate performance, and exhibits 95.90 % cycling stability after 5500 charge-discharge cycles. Furthermore, when integrated with an activated carbon anode, it delivers an energy density of 42.13 Wh kg −1 at a power density of 860 W kg −1 . This result shows that doping-induced interfacial reconstruction can significantly enhance material performance and provides a compelling strategy for surface engineering in the development of supercapacitors with enhanced capabilities.
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ACS Applied Polymer Materials
·
2025
·
IF 4.7
Wenhui Yan,Shijun Li,Jieyao Wang,Xingyu Ma,Mingxuan Zhang,Lei Li
The recovery of gold from electronic waste by absorption is a sustainable process owing to its easy operation, low cost, and negligible energy consumption. Thiourea groups demonstrate a strong affinity toward Au(III); therefore, microporous polythioureas (PTUs) are believed to be emerging absorbents and advantageous over other porous materials. Motivated by the successful preparation of porous organic polymers (POPs) via domino polymerization in our recent report, the one-pot strategy is introduced to the synthesis of microporous PTUs. During the polymerization process, thiourea knots are formed between the reaction of amino and diisothiocyanate monomers and integrated into networks by the simultaneous self-cross-linkage of alkynyl, acetyl, or double-bond groups on the amine monomers. Eventually, the family of POPs exhibits a maximum surface area of 561 m2 g–1. The thiourea groups and microporous structures endow the products with high Au(III) adsorption capacities (maximum: 1159 mg g–1) and remarkable adsorption selectivity. Even in actual electronic waste, where the concentration of Au(III) (0.18 mg L–1) is much lower than that of other interference ions (approximately 200 mg L–1), 100% removal efficiency is accomplished. This achievement not only verifies the versatility of the domino polymerization methodology for the construction of POPs but also sheds light on the potential application of high-performance gold adsorbents in real scenarios.
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JOURNAL OF ECONOMIC ENTOMOLOGY
·
2025
·
IF 2.4
Yan Haoming,Qiu Haiyan,Zhao Jing,Han Dongyin,Fu Yueguan,Zhou Aiming,Chen Junyu,Li Lei
The cowpea thrips Megalurothrips usitatus (Bagnall) (Thysanoptera: Thripidae) exhibited unexpected aggregation on flowers of the non-host Baccaurea ramiflora Lour. (Malpighiales: Phyllanthaceae), suggesting floral volatile-mediated attraction. We systematically investigated this phenomenon through: (i) GC-MS identification of B. ramiflora floral volatiles; (ii) electroantennographic (EAG) and olfactory assays; and (iii) field trapping experiments. Both the flowers of B. ramiflora and their headspace extracts exhibited significant attractive effects on M. usitatus. Five key volatile organic compounds were consistently detected: linalool, 2,4-decadienal, trans-2-decenal, (Z)-β-ocimene, and trans-2-undecenal. The antennae of M. usitatus demonstrate distinct sensitivities to different volatiles, with the appearance of their EAG response peaks being affected by the dosage levels at which these volatiles are applied. The olfactory responses revealed that linalool (100 to 10000 μg), 2,4-decadienal (10 to 10000 μg), and trans-2-undecenal (1000 to 10000 μg) attracted M. usitatus. Trans-2-decenal attracted M. usitatus at 1000 μg but repelled at 10000 μg. (Z)-β-ocimene repelled M. usitatus at doses ranging from 10 to 10000 μg. Field trials confirmed 2,4-decadienal (10 to 100 μg) as the most effective attractant. These findings support the development of a 2,4-decadienal-based semiochemical strategy for sustainable M. usitatus management in cowpea production systems.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Yusen Chen,Shuzhao Zhang,Xiongcheng Duan,Jia Liu,Hengye Li,Meijie Wei,Wei Wang
The rapid and efficient removal of radioiodine from water is a challenging and meaningful task to safeguard human health. Herein, two calix[4]pyrrole-based polymers were prepared through Mannich reaction between nitrogen-rich 2,4,6-tri(piperazin-1-yl)-1,3,5-triazine (TPT) and two configurational isomers of tetra- meso resorcinol-functionalized calix[4]pyrrole (2α2β-CP and 4α-CP), referred as 2α2β-CP-TPT and 4α-CP-TPT, respectively. The nitrogen contents of 2α,2β-CP-TPT and 4α-CP-TPT were as high as 15.11 % and 14.84 %, respectively. Accompanied by the bowl-shaped calix[4]pyrroles, the CP-TPTs showed high vapor iodine uptake, especially 4.82 g/g for 4α-CP-TPT. More importantly, the CP-TPTs exhibited rapid adsorption kinetics for capture iodine from aqueous phase, with the 2α,2β-CP-TPT at 1 mg/mL level showing a k 2 value as high as 7.374 × 10 −3 g/(mg min). In addition, high iodine adsorption capacity for 2α,2β-CP-TPT and 4α-CP-TPT were achieved to be 1989.6 and 2812.6 mg/g from water, respectively. Even more impressive was the removal efficiency above 98 % in flow-through applications even at flow rate as high as 10 mL/min and in simulated seawater conditions. The CP-TPTs could also exhibit high dynamic iodine adsorption capacity from water as well as excellent stability and outstanding reusability. Adsorption mechanism study discovered the foundational role of the charge transfer interaction on the excellent adsorption performance of the CP-TPTs. All these features demonstrated promising application prospects of the CP-TPTs for iodine removal from water.
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