INDUSTRIAL CROPS AND PRODUCTS
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2025
·
IF 6.2
Liying Zhang,Hanchen Wang,Zhenghan Cai,Feng Zhu,Biao Huang,Qi-Lin Lu
The construction of hierarchically porous carbon with a rational pore distribution using environmentally benign activators, while simultaneously incorporating heteroatom doping, is crucial for the preparation of electrode materials for supercapacitors. Here, a green one-step method has been developed that utilizes a biomass derivative, chitosan, as the matrix to construct a nitrogen-doped carbon framework, with polyethyleneimine (PEI) for synergistic nitrogen doping and hydrogen bonding interactions to optimize the carbon framework. Phytic acid (PA) is employed as a phosphorus source, activator, and crosslinker to build hierarchical porous carbon containing phosphorus doping, while carboxylated nanocellulose (CNC) is introduced to regulate the uniformity of the pore structure. The resulting HPC exhibits a specific surface area of 939.87 m²/g, a total pore volume of 0.45 cm³ /g, and a high specific capacitance of 350 F/g at a current density of 1 A/g. Furthermore, the HPC supercapacitor assembled at this current density demonstrates an energy density of 18.3 Wh/kg at a power density of 450 W/kg, with a capacitance retention rate of 86 % and a coulombic efficiency of 97 % after 10,000 cycles. Therefore, the approach in this study, which involves the use of PA to activate carbon precursors while incorporating heteroatom doping and adding CNC to promote uniform heteroatom doping, provides valuable insights for the facile, efficient, and green synthesis of biomass-based porous carbon materials, and contributes to energy storage applications.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
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IF 7.7
Yilin Zhan,Zhongyong Xu,Lei Wang,Mingle Li,Xiaoqiang Chen,Taisheng Wang,Na Zhang,Bin Liu
The extensive agricultural use of chitin synthesis inhibitors (CSIs) has garnered significant concern due to their environmental persistence and potential ecological risks. A persistent challenge in this context is the concurrent discrimination and quantitative detection of multiple CSI residues in complex matrices. To address this issue, we developed a fluorescent sensor array utilizing a supramolecular system for the identification and quantification of four common CSIs: buprofezin, chlorfluazuron, diflubenzuron, and flufenoxuron. This system exploits the co-binding of a fluorescent indicator and CSI within the hydrophobic cavity of albumin, inducing pattern-based ratiometric fluorescence responses. The generated unique fluorescence fingerprint profiles for each CSI enable differentiation through multivariate statistical analyses, including linear discriminant analysis (LDA) and hierarchical cluster analysis (HCA), yielding 100 % classification accuracy across both individual CSIs and their mixtures. Furthermore, quantitative detection is facilitated by a linear correlation between LDA feature scores and CSI concentrations. The practical utility of this platform was substantiated by successful discrimination of CSIs in real-world samples, including millet, soil, and aqueous environments, with performance maintained across diverse matrix compositions, offering a critical advancement in addressing the analytical challenges posed by these persistent pesticide residues.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
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IF 9
Yonghao Wang,Shanshan Lei,Miao Liu,Ming Zhou,Zhiwei Zou,Youmei Liu,Xiaomei Zheng
Electrocatalytic reduction of nitrate (NO 3 RR) to ammonia is considered as a promising strategy for nitrogen resource recovery from nitrate-contaminated water. However, conventional Cu-based catalysts often suffer from poor selectivity, with toxic nitrite accumulation and sluggish reduction kinetics. This work reports a Cu Co co-loaded carbon catalyst (CuCo-C) that leverages electron-deficient Cu sites in synergy with Co to significantly enhance the NO 3 RR activity and ammonia selectivity. The optimized CuCo-C discloses a nitrate removal rate of 94 %, an ammonia selectivity of 99 % and multi-turn stability. The combination of comprehensive surface analysis and experimental techniques reveals that the high NO 3 − -to-NH 4 + performance results from Co-induced electronic modulation of Cu sites. This synergistic effect not only kinetically facilitate the adsorption and activation of NO 3 − but also enhance the selectivity of key intermediate (NO 2 − ) towards NH 4 + formation. Density Functional Theory (DFT) calculations and synchrotron radiation-based XAFS measurements further reveal the presence of Co promotes the adsorption of NO 3 − (forming *NO 3 ), lowers the energy barrier for *NO 3 to *NO 2 deoxygenation and simultaneously suppresses the competing H 2 evolution reaction. Importantly, the presence of Co promotes the conduction of the electron reduction path by CuCo-C to generate NH 4 + . This work provides valuable insights for the rational design of high-performance Cu-based electrocatalysts for sustainable nitrate remediation and ammonia synthesis.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 25
·1-13
·
IF 2.8
Zhang Yuexing,Feng Wenlin,Ullah Arif
To address the need for high-sensitivity carbon monoxide (CO) gas sensing at room temperature, a CO gas sensor based on Au-modified tin oxide/zinc oxide (SnO₂/ZnO) nanocomposites is fabricated. SnO₂ nanoparticles, ZnO nanosheets, and Au nanoparticles (AuNPs) were synthesized using sacrificial template, hydrothermal, and chemical reduction methods, respectively. The resulting nanocomposite was then drop-casted onto interdigitated electrodes and dried to obtain the CO gas sensor. The performance of the sensor was evaluated using a custom airtight chamber and a semiconductor parameter analyzer. The n–n heterojunction between SnO₂ and ZnO significantly increased oxygen vacancy in the composite material, enhancing surface chemisorption of oxygen. Moreover, the catalytic sensitization effect of AuNPs facilitated electron migration, while their inherent spillover effect promoted the activation of gas molecule interactions. Consequently, the sensor exhibited a high response (22.11%) to 70 ppm CO at room temperature, along with excellent stability, selectivity, and anti-interference capabilities. This work offers a promising approach for developing highly sensitive room-temperature gas sensors.
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2025
·Vol. 131
·期 6
·1-11
·
IF 2.8
Wang Qun,Bu Ranran,Xu Changyuan,Zhao Fengjiao,Yin Hongming
Tellurite glass samples doped with Er 3+ and Eu 3+ were synthesized by the high-temperature solid phase method. The XRD diffraction pattern shows the amorphous properties of the prepared samples. The luminescence properties of glass samples were analyzed using the absorption spectrum, excitation spectrum, and emission spectrum. The energy transfer mechanism between Er 3+ ions and Eu 3+ ions was studied by changing the concentration of Eu 3+ ions, and the results were verified by measuring the luminescence decay lifetime. It is worth noting that at 380 nm excitation, Er 3+ and Eu 3+ co-doped tellurite glass exhibits remarkable tunable luminescence characteristics: by adjusting the concentration of Eu 3+ ions, the emission color can be flexibly adjusted from green to orangish-red. In addition, by effectively combining the prepared co-doped glass sample with the 380 nm GaN chip, the cold white light emission with CIE coordinates of (0.324, 0.320) was successfully achieved. According to the variable-temperature spectroscopy, at 210℃, the emission peak intensities of the co-doped Er 3+ /Eu 3+ tellurite glass at 547 nm and 613 nm are above 70% of the room-temperature luminescence intensity, demonstrating excellent thermal stability. Graphical
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Xu Liu,Jingzhe Li,Zewang Liu,Guang-zai Nong
The interfacial tuning of carbon materials is paramount to enhancing capacitive performance. Heteroatom doping significantly alters carbon materials' structural, electronic, and surface properties, improving their electronic conductivity and ion transport pathways. This process also introduces additional energy storage sites and improves structural stability to meet the requirements of advanced electrochemical energy storage systems. A N/Cl co-doped porous carbon material has been synthesised in this study. The material has a surface area of 1849.778 m 2 /g and a specific capacitance of up to 324 F/g at 0.5 A/g. Capacitance retention was as high as 89.69 % after 5000 cycles at 10 A/g. Furthermore, a symmetric supercapacitor based on BC121–800 exhibits an energy density of 11.6 Wh/Kg at a power density of 250.4 W/Kg. This study contributes novel strategies to enhance energy storage technologies.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Minghan Zhou,Tongtong Gao,Shuanglong Chen,Xuejiao Wang,Qiushi Wang,Cailong Liu
Due to its unique advantages including non-contact operation, high sensitivity, and exceptional spatial resolution, nanoscale optical thermometry has become an indispensable technique with widespread applications in micro/nanoelectronics, integrated photonic systems, and biomedical engineering. Here, Yb 3+ /Tm 3+ co-doped AlN nanowires were successfully synthesized via an arc-discharge method. The nanowires, characterized by X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, energy-dispersive X-ray spectroscopy, scanning electron microscopy, and transmission electron microscopy, exhibit lengths of several micrometers and uniform diameters ranging from 10 to 20 nm, yielding a high aspect ratio. Under 980 nm excitation, the nanowires display distinct up-conversion (UC) luminescence, with emission bands at 544 nm (green), 654 nm and 691 nm (red), and 795 nm (near-infrared), corresponding to Tm 3+ ion transitions. The AlN:Yb 3+ /Tm 3+ nanowires show excellent optical thermometry performance, achieving a maximum relative sensitivity ( S r ) of 3.32 % K −1 at 298 K and a temperature resolution ( δT ) of 0.009 K. These results underscore the potential of AlN:Yb 3+ /Tm 3+ nanowires for advanced optical temperature sensing in nanotechnology, biomedical applications, and high-resolution thermal imaging.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 30
·1-16
·
IF 2.8
Chen Yuxiao,Jiang Yongle,Gan Fangyu,Zhong Yan,Yao Qingrong,Cheng Lichun,Lu Zhao,Qin Haiqing,Wang Jiang,Huang Yuxuan
Microwave absorption materials can achieve superior performance through the implementation of effective strategies such as morphology and composition design. In this study, a straightforward hydrothermal approach was employed to synthesize FeCo/Co@C composites with a dandelion-like morphology. Subsequently, the investigation focused on systematically examining the influence of carbon content and pyrolysis temperature on the microstructure, phase composition, and microwave absorption performance. The findings indicate that at a glucose of 3 mmol and pyrolysis temperature of 700 ℃, FCC2 exhibit a significant reflection loss (RL) of –51.13 dB, accomplished through the utilization of an exceptionally slim matching thickness measuring only 1.4 mm, additionally, optimal effectiveness across a bandwidth of 5.0 GHz can be attained at 1.5 mm. The remarkable ability of FCC2 samples to absorb microwaves can be credited to the distinctive structure resembling a dandelion and precise matching of magneto-dielectric elements. Consequently, these FeCo/Co@C composites show great potential as lightweight, high-performance microwave absorbers, offering a simple and efficient strategy for designing broadband absorption materials.
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Sustainable Materials and Technologies
·
2025
·
IF 9.2
Haize Jin,Xiaoxia Huang,Wen Yijun,Mengyao Zhu,Cuixia Li,Qikun Wang
Photothermal synergistic catalysis provides an efficient implementation strategy for CO₂ conversion into renewable energy. Here, we synthesized a geopolymer/g-C₃N₄/Ni(OH)₂ (GCN) photothermal catalyst featuring nanoscale-interval exposed adsorption and photothermal catalytic active sites through concurrent geopolymerization and alkaline precipitation reactions. The rational modulation of Ni(NO₃)₂ proportion induced explosive nucleation of Ni(OH)₂, ultimately resulting in a nanostructure where geopolymer nanoclusters and Ni(OH)₂ nanocrystals were intergrowth on the g-C₃N₄ interface. The construction of this ternary system effectively enhanced the photogenerated electrons transfer efficiency, and synergized with the thermal effect to significantly improve CO₂ reduction efficiency. And the GCN demonstrated exceptional capture capabilities for both CO₂ and H₂. Under light irradiation, GCN exhibited non-thermal photochemical effect characteristics. Through the photo-assisted thermal catalysis synergistic action, the CO₂ conversion product rate reached 1057.89 mmol.g cat −1 .h −1 , which was 17,869.84 times and 1.16 times higher than those under pure photocatalysis and pure thermal catalysis, respectively. The corresponding CO selectivity can reach 96.05 %. And GCN exhibited stable photothermal cycling performance, the production rate in the 10th cycle still reached 970.28 mmol·g cat −1 ·h −1 . Moreover, the formation of chemical bonds at the geopolymer/Ni(OH)₂ interface effectively suppressed the excessive reduction of Ni(OH)₂ to metallic Ni 0 , thereby inhibiting deep hydrogenation of CO and ensuring high CO selectivity. This study provides both theoretical and technical foundations for the development of low-cost and high-efficiency CO₂ photothermal reduction catalysts.
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Processes
·
2025
·Vol. 13
·期 11
·3507
·
IF 2.8
Yongshuang Li,Ting Feng,Jifei Liu,Cheng Pan,Yi Wang,Zhenzhen Wu,Guozhi Fan
The lignin nanoparticle (LNP) was prepared by the self-assembly method and further blended with poly(butylene adipate-co-terephthalate) (PBAT) to obtain a PBAT/LNP composite using a solvent casting method. It was found that the nano-modification of lignin effectively improved the compatibility between the components, and the mechanical properties, gas barrier properties, UV resistance, degradation, and antibacterial properties of the PBAT/LNP composite. Compared with PBAT, the tensile strength, elongation at break, and elastic modulus of the PBAT/LNP composite with 8 wt% LNP (PBAT/LNP-8) increased by 37.36%, 47.30% and 50.70%, respectively. Moreover, the mechanical properties, UV-blocking performance, and gas barrier properties of PBAT/LNP-8 were better than those of the commercial degradable packing bag, and the composite derived from PBAT and lignin extracted from wheat straw also showed excellent properties. This work explored a way to expand the utilization of lignin from lignocellulosic biomass, which not only helped to solve the environmental pollution caused by the widespread use of non-degradable plastics, but also promoted the replacement of fossil resources.
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Micro and Nanostructures
·
2025
·
IF 3
Zhou Huang,Feng Nan,Zhilong Zhang,Weiyu Feng,Lei Zhou
Silicon (Si) photodetectors are of great importance due to their many scientific and industrial applications, including optical interconnects, spectroscopy, optical communications, and semiconductor device processing. However, the responsivity of Si photodetectors drops sharply at shorter wavelengths due to their high light absorption coefficient and increased reflectivity in this range. In this report, a hybrid Si photodetector architecture is demonstrated by integrating an ultrathin fluorine- and nitrogen-co-doped carbon quantum dots (fnCQDs) layer using a facile fabrication technique. The results show that the hybrid device achieves a broadband photoresponse. The optimized incorporation of fnCQDs enhances the short-wavelength range responsivity between 300 nm and 550 nm, while simultaneously maintaining nearly identical fast rise times at the peak as the conventional bare Si device under 0 V working voltage. Moreover, the photoresponsivity and gain of the engineered optimal device are found to be approximately 0.012 A/W and 328, respectively, at a wavelength of 365 nm. Additionally, the maximum photocurrent-to-dark current ratio (@365 nm) of this hybrid device under a 0.01 V bias reaches approximately 6200, nearly six times greater than that of the standard reference device. The proposed approach and findings demonstrate the significant potential of fnCQDs for applications in hybrid photodetectors and related technologies.
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JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Wenjie Li,Pengfei Mao,Xuwen Chen,Wanting Ling,Chao Qin,Yanzheng Gao
Developing efficient passivating sorption materials for the treatment of combined pollution by phthalate esters (PAEs) and Cd 2+ has become a critical focus in environmental protection and soil remediation. In this study, biochar-sulfhydryl modified montmorillonite composites (BC-SHMMT) were synthesized, characterized, and evaluated for the co-sorption of PAEs (DMP, DEP) and Cd 2+ . The integration of sulfhydryl-modified montmorillonite (MMT-SH) with biochar improved the material's surface structure, enhancing both co-sorption capacity and structural stability. Molecular dynamics simulation indicated a monolayer chemical sorption of pollutants by BC-SHMMT, in alignment with the sorption theoretical model. In the co-sorption system, the coexistence of pollutants increased the adsorption of Cd 2+ and decreased the sorption of PAEs. The smaller molecular size and higher diffusion coefficient of Cd 2+ facilitated its pore filling and interaction with oxygen-containing functional groups of the material, leading to competition with PAEs for sorption sites. Notably, the ion exchange and complexation of Cd 2+ adsorption by MMT-SH are pivotal in enhancing BC-SHMMT co-sorption capacity. These findings provide valuable insights into the development of eco-friendly novel materials and the improvement of co-pollution remediation efficiency.
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