Advanced Optical Materials
·
2024
·
IF 8
Moushira. A. Mohamed,Mohamed. A. Ali,Guo Shaorun,Xiaofeng Liu,Jianrong Qiu
Phosphor-in-silica glass (PiSG) composite is an excellent candidate for highly stable and efficient color converter in high power white light emitting diodes (wLEDs). However, the high-throughput fabrication of PiSG with different shapes is still challenging for current techniques. Here this study reports the manufacture of transparent PiSG based on YAG:Ce (Y 3 Al 5 O 12 :Ce 3+ ) using injection molding (IM) technique. In this approach, different shapes of centimeter-sized YAG:Ce-PiSG pieces are fabricated by using IM of a YAG:Ce/amorphous silica nanoparticles/thermoplastic polymer composite at low temperatures (@ 150 °C) which afterward are debound (@ 600 °C) and densified (@ 1150 °C). Interestingly, the molding time to produce YAG:Ce/silica/polymer green parts is 5 s per piece, implying the capability for high-throughput production of YAG:Ce-PiSG. Furthermore, the as-fabricated YAG:Ce-PiSG exhibits high luminescence efficiency (>91%) and high chemical/thermal stabilities. Accordingly, high power wLEDs (10 W) are fabricated using the YAG:Ce-PiSG which demonstrates high luminous efficiency of 144 lm W −1 at 50 mA, closing to that of the wLEDs fabricated by expensive YAG:Ce ceramic plate (i.e., 149 lm W −1 @ 50 mA). The work provides a facile and universal approach for industry-scale production of PiSG that can be promising for various photonic applications.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Jianming Wu,Qian Ma,Qingkai Pang,Qinjie Xu,Lihong Geng,Xiangfang Peng,Zhenming Chen,Peng Li,Yukun Chen
Given the toxicity of wastewater pollutants to both humans and the environment, it is critical to develop a new synthetic membrane with superior permeability and rejection. Herein, a novel asymmetric polyethersulfone (PES) composite filtration membrane was successfully prepared using a simple alternating vacuum-deposition process with positively charged chitosan and negatively charged cellulose nanofibrils as polycations and polyanions, respectively. As expected, the produced PES composite filtration membranes had a compressed and negatively charged surface, which prevented the anionic dye methyl blue (MB) molecules from infiltrating into the membrane matrix. Consequently, the resulting PES composite filtration membranes exhibited an extremely high MB rejection (99.7%) and a satisfactory flux (37.47 L h −1 m −2 MPa −1 ). In addition, the composite membrane demonstrated extremely selective removal of anionic dyes in the presence of neutral dyes due to the Donnan effect. Furthermore, the developed PES composite filtration membranes displayed exceptional long-term stability (99.8% rejection and 36.5 L h −1 m −2 MPa −1 flux after 50 h of filtration) and recycling properties (90.1% flux recovery rate after 3 cycles of running). In conclusion, the PES composite filtration membranes prepared in this study presented great potential in wastewater filtering.
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ACS Sensors
·
2024
·
IF 8.2
Fan Zhang,Hui Chi,Xiaotong Dong,Xiaona Huang,Kun Xu,Yungang Bai,Pixin Wang
An amino functionalized paper-based material that utilized amino functionalized polymer particles as sensing probes and adsorption sites was fabricated via internal sizing technology for application in formaldehyde detection and adsorption. A large specific surface area and the porous structure of the paper fibers enable the application of the composite paper-based material as a sensor at low concentrations of primary amine groups. The material reacts with low levels of formaldehyde, resulting in a concentration-based change in the pH, which is rapidly expressed as a color change. After exposure to formaldehyde (0.02 mg/m3) for 10 min, the color of the composite paper-based material changed from pink to brown, demonstrating the high sensitivity of the material, and this transition could be clearly observed using the naked eye. Additionally, the composite paper-based material acts as an adsorbent at a high content of amino groups, owing to a rapid addition reaction with formaldehyde, exhibiting a high adsorption capacity. Considering the high sensitivity, adsorption capacity, and adsorption speed for formaldehyde, the as-developed composite paper-based material exhibits promising application potential in the field of formaldehyde detection and adsorption.
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ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Zhuqian Xiao,Qian Zhao,Qin Li,Yurui Wang,Huilin Zheng,Hongpeng Wang,Jun Huang,Jianwei Mao
The current manufacture of (carboxymethyl)cellulose (CMC) requires a large amount of solvents, severely resulting in environmental impacts and a laborious separation process. Herein, a “green” synthetic route employing a mechanochemistry strategy was addressed to prepare CMC promoted by minute surface-confined water. The mechanical forces (shear and strain) from ball collisions facilitated the formation of disordered regions, promoting the water-holding capacity of cellulose. Together, water molecules permeated the impact structure and were locked by surface hydroxyls, intensifying the chemical accessibility. The resultant CMC possessed a wide degree of substitution within 0.38–1.03 and a maximum yield of 46.1% under optimal mechanochemical conditions. Density functional theory revealed that Gibb’s free energy (ΔGTS) of hydroxyl activation was approximately −1.73 eV on the surface of dry cellulose. In comparison, ΔGTS was reduced to −3.37 eV upon intervention of water. The reactivity sensitivity of hydroxyls was C2 > C6 > C3 on the surface of highly hydrated cellulose. The high concentration (1200 μg/mL) of CMC was not significantly toxic to HepG2 cells (apoptosis rate of less than 4.0%), demonstrating the excellent biocompatibility of CMC prepared by this strategy. This mechanochemical method opened a safe and environmentally friendly avenue to produce CMC without sacrificing excess reagents.
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ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Kai Xu,Yu Zheng,Junjie Zhou,Yang Zhao,Xiao Pang,Lijuan Cheng,Hui Wang,Xianjuan Zhang,Runnan Zhang,Zhongyi Jiang
Fabrication of crystalline, robust covalent organic framework (COF) membranes based on disorder-to-order strategy is promising yet highly challenging. Herein, a microwave-assisted method for fabricating COF membranes is proposed. Initially, monomers polymerize rapidly on the surface of porous Al 2 O 3 substrate at room temperature to form an amorphous pristine membrane. Subsequently, a microwave field is exerted to trigger fast crystallization, acquiring a crystalline COF membrane within 60 min. The amorphous pristine membrane exhibits a high dissipation factor, indicating excellent microwave absorption capability, which accelerates the dynamic reversible reactions during the microwave treatment and thus ensures a rapid transition from the amorphous to the crystalline state. Owing to the high-crystallinity and robust structure, the COF membranes exhibit high rejection rates for solute molecules with molecular weights exceeding 700 Da (e.g., Evans blue: 98.7%) and high solvent permeance for organic solvents (e.g., ethanol: 87.8 Lm −2 h −1 bar −1 , n-hexane: 222.3 Lm −2 h −1 bar −1 ). Surprisingly, the COF membranes exhibit superior mechanical properties, with Young's modulus of 33.91 ± 3.94 GPa, outperforming previously reported polycrystalline COF membranes and are close to those for inorganic zeolite membranes. The microwave-assisted COF crystallization method opens a new avenue to fabricating a variety of crystalline membranes for advanced separations.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiankun Cao,Yumo Chen,Hailiang Nie,Hongyuan Yan
Polyimide nanofiber aerogels loaded with thymol blue and hydroxylamine sulfate (TB-HAS@PI NFAs) were synthesized and employed as a novel sensor for colorimetric detection of breath acetone (BrAce). The enhancement of 3D multi-level pore structure of TB-HAS@PI NFAs for sensing performance was elucidated through systematical characterization results. Because the designed sensing system relied on the specific reaction of HAS with acetone, TB-HAS@PI NFAs exhibited a more sensitive response ability to acetone, ensuring that the colorimetric sensing detection will not be interfered by other coexisting gas in exhaled breath. Moreover, the sensor demonstrated a rapid response, with color changes quantitatively measured within 30 s of exposure to acetone gas. Importantly, the feasibility and accuracy of established method were confirmed through comparison with GC–MS. This research provided a promising strategy for daily health management of healthy people and diabetics.
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ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Zhengping Ding,Jing Li,Yanqing Huang,Huahui Lin,Peng Wei,Jianbin Li,Xiangqun Zhuge,Zhenzhong Yang,Ke Qu,Yurong Ren
The burgeoning use of lithium-ion batteries (LIBs) creates a growing challenge: spent battery management. Traditional hydrometallurgical recycling with coprecipitation generates massive Na2SO4 wastewater, posing a significant environmental burden. This work presents a novel, closed-loop recycling method for LIB cathode materials that merges electrolysis and hydrometallurgy. Using Na2SO4 electrolysis, we produced high-purity sulfuric acid and sodium hydroxide solutions, which served as the key reagents for leaching and resynthesizing waste cathodes. Optimized leaching conditions ensure near-complete recovery of valuable metals. Li2CO3 and a precursor (Ni0.8Co0.1Mn0.1(OH)2) are subsequently precipitated and regenerated into a new LiNi0.8Co0.1Mn0.1O2 cathode material, which demonstrates excellent electrochemical performance. The spent Na2SO4 solution undergoes a simple treatment before re-electrolysis, achieving a closed-loop system with minimal waste generation and reduced reliance on external reagents. Moreover, the acid-leaching carbon residue is repurposed as a bifunctional carbon-based catalyst for hydrogen peroxide production. This innovative approach offers both economic and environmental benefits, paving the way for sustainable LIBs recycling and a circular economy for battery materials.
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FOOD CHEMISTRY
·
2024
·
IF 8.5
Junbo Chu,Songyi Lin,Yi Yuan,Siqi Zhang,Simin Zhang
Eel is a commercially important marine fish, frequently featured as sushi or roasted preparations. This study determined the formation of heterocyclic amines (HAs) and advanced glycation end products (AGEs) in roasted eel and evaluated the inhibitory mechanism of quercetin and l -ascorbic acid on their formation. The results indicate a respective reduction of 75.07% and 84.72% in total HAs, alongside a decline of 23.03% and 39.14% in AGEs . Additionally, fundamental parameters of roasted eel, lipid oxidation indicators and precursors were measured to elucidate the mechanisms and impact of natural antioxidants on HAs and AGEs formation in roasted eel. Furthermore, endeavors were made to probe into the molecular mechanisms governing the influence of key differential lipids on the generation of HAs and AGEs through lipid-mics analysis. This research emphasizes the potential of natural antioxidants in preventing harmful substances formation during eel thermal processing, which is helpful to food manufacturers for healthier food production.
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AICHE JOURNAL
·
2024
·
IF 3.5
Ruilong Li,Yongjian Yang,Jingjing Chen,Chongchong Chen,Wenpeng Li,Xiaoli Wu,Jingtao Wang
Porous membranes, a type of material widely used in nanofiltration, are confronted with the limitation that the influence of channel–molecule interactions on transport behaviors has yet been investigated in detail. Herein, covalent organic framework membranes with adjustable pore sizes (⁓ 2.5 nm and ⁓ 1.2 nm) and chemical groups (−F, −OH, and −CO−) were prepared by interfacial polymerization. We demonstrate that strong channel–molecule attraction induces the formation of stable solvent layers along nanochannel walls, which protect central molecules from the attraction of chemical groups. Significantly, stable solvent layers permit fast transport of ethanol (245.6 L m −2 h −1 bar −1 ) with reactive black (RB) rejection of 96%. Likely, for membranes with weak channel–molecule attraction, no solvent layers are formed and molecules also transport smoothly. Interestingly, membranes that exhibit moderate channel–molecule attraction exert metastable solvent layers, thus displaying high transport resistance. This hindrance effect on molecule transport becomes more pronounced in smaller nanochannels.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Gang Liu,Sheng Xu,Wenting Li,Zhenxi Wang,Jinlong Cui
In order to expand the photoresponsive spectrum of TiO 2 and improve its catalytic activity under visible light, the hollow urchin-like composites of TiO 2 @g-C 3 N 4 /GQDs (TCN/GQDs) with a core-shell structure heterojunction was synthesized through a hydrothermal method and calcination. Potassium titanium oxalate, melamine, and citric acid were utilized as the raw materials for this synthesis process. The TCN/GQDs composites were subjected to a range of analyses to examine their microstructure and photoelectric properties. The findings indicated that the synthesized composites effectively enhanced the absorption spectrum of TiO 2 in the visible light range by creating the stable heterojunctions among TiO 2 , g-C 3 N 4 and GQDs. Additionally, the ability of these composites to degrade toxic organic pollutants under visible light was studied by using several different organic dyes and antibiotics. The results demonstrated that the TCN/GQDs composites exhibited efficient visible light catalytic degradation capability on organic pollutants, and the degradation efficiency could approach to 100 % under visible light in a short time. Furthermore, the photocatalyst exhibited hardly change of degradation efficiency towards organic pollutants even after 5 cycles of testing, suggesting its commendable performance in visible light catalysis and potential for repeated utilization.
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RSC Advances
·
2024
·Vol. 14
·期 33
·24165-24174
·
IF 3.9
Yun-Yun Li,Jing Li,Yan Li,Hong-Ping Long,Wei Lin,Yi-Kun Wang,Rong Tang,Xue-Wu Liu,Dejian Jiang,Shao Liu,Dongsheng Cao,Gui-Shan Tan,Kang-Ping Xu,Wen-Xuan Wang
Hyperuricemia, characterized by elevated uric acid levels and subsequent crystal deposition, contributing to conditions such as gout, cardiovascular events, and kidney injury, poses a significant health threat, particularly in developed countries. Current drug options for treatment are limited, with safety concerns, leading to suboptimal therapeutic outcomes in symptomatic hyperuricemia patients and a lack of pharmaceutical interventions for asymptomatic cases. Distinguishing from the previous drug design strategies, we directly target uric acid, the pathological molecule of hyperuricemia, resulting in a pyrimidine derivative capable of increasing the solubility and excretion of uric acid by forming a complex with it. Its prodrug showed an anti-hyperuricemia activity comparable to benzbromarone and a favorable safety profile in vivo. Our finding provides a strategy purely based on organic chemistry to address the largely unmet therapeutic needs on novel anti-hyperuricemia drugs.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yongxin Zheng,Hengkai Gao,Ziyao Liu,Cenhao Li,Xianchao Feng,Lin Chen
This study aimed to develop an ammonia and pH super-sensitive label by incorporating methyl red and bromothymol blue (MR-BTB, MB) into gellan gum/sodium carboxymethyl cellulose (GG/CMC-Na, GC). Furthermore, E-nose as an auxiliary tool combined with the labels to monitor meat freshness. Results showed that MB had more color change than pure MR or BTB, and the detection limit of ammonia about the MR-BTB (1:2) group was only 2.82 ppm. The addition of MB significantly increased tensile strength, moisture content, and water solubility, but decreased elongation at break and transmittance of the GC label ( p < 0.05). The result of FTIR and SEM indicated the formation of hydrogen bonds and well compatibility between MB and GC. Furthermore, the color of the GC-10.0MB label was constantly obviously changing during meat storage, indicating that the GC-10.0MB label had great potential for monitoring the freshness of the lamb meat. A high correlation was found between ΔE of GC-10.0MB label and TVB-N (R 2 = 0.9092) and pH (R 2 = 0.9114) of meat. Interestingly, the high correlation between ΔE of GC-10.0 MB label and the response value of S2 (R 2 = 0.7531), S6 (R 2 = 0.9921), and S7 sensor (R 2 = 0.8325) of E-nose was also found.
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危险品化学品经营许可证（带存储）