CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Zelong Jiang,Tao Hu,Fanchao Men,Hong Yang,Wei Lv,Dawei Wen,Qingguang Zeng,Yan Gao
The pursuit of efficient red emitting Eu 2+ doped oxide is endless, aiming to replace the state-of-the-art CaAlSiN 3 :Eu 2+ nitride counterpart to achieve cheaper and more stable warm illumination. Herein, we identify a hitherto unreported CaLuGaO 4 olivine compound. The crystal structure of the compound is belong to orthorhombic Pnma . Phonon dispersion relations have no imaginary frequency, verifying thermodynamic stability of the crystal structure. It structurally contains an octahedral Ca 2+ site that definitely has strong crystal field splitting energy, which motivates us to incorporate it with Eu 2+ to realize red emission through 4 f 6 5 d 1 → 4 f 7 transition of the octhdedral Eu 2+ ion. This goal is achieved as found the divalent Eu 2+ is necessarily stabilized in this site under CO sintering atmosphere rather than H 2 /N 2 . The as-designed CaLuGaO 4 :Eu 2+ exhibits impressively appealing properties, i.e., intense red emission at 650 nm (λ ex = 450 nm), with high PLQY up to 86 % and good thermal stability in temperature range 10–500 K, marking it as a promising and formidable red phosphor in warm illumination. The excellent emission properties are theoretically revealed to associate with the closed-packed dimensional crystal structure with high Debye temperature equals 440 K, which reduces the non-radiative recombination loss. The investigations in electron-vibrational interaction in the Eu 2+ :5 d state disclosing the interaction is intermediate coupling regime with Huang-Rhys factor of 4.3. As a proof-of-concept experiment of the red phosphor for illumination, a prototype WLED possession of low CCT = 3917 K, high Ra = 92.2, and excellent luminous efficiency = 110 lm/W is constructed, and a portable rechargeable LED flashlight is assembled, by utilizing CaLuGaO 4 :Eu 2+ phosphor as a key red convector. Moreover, we have also demonstrated the phosphor synthesized under H 2 /N 2 can apply for latent fingerprint visualization.
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Environmental Technology & Innovation
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2024
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IF 6.7
Mengyao Pan,Yuwei Jin,Yanli Ye,Wenbin Jiang,Lisha Zhu,Wangyang Lu
Silk is a promising textile resource, but its degumming treatment still lacks efficient and non-polluting methods. In this paper, an innovative silk degumming process combining microwave pre-treatment and steam degumming is introduced. When the technical parameters of microwave-steam synergistic degumming were 10 min of microwave, 120 ℃ of steam temperature, and 30 min of steam time, the degumming efficiency of the specimen was three times of the traditional Na 2 CO 3 degumming method, and the energy consumption was only one-half of the traditional method. In terms of time efficiency, the traditional Na 2 CO 3 degumming took 2.75 h, while this novel method took only 0.75 h. Among the samples, the mechanical properties of the specimens treated with microwave for 10 min were the best, with the warp breaking strength of 542.20 N and the weft breaking strength of 356.19 N. Meanwhile, the hygroscopicity and air permeability were also the best compared to the traditional treating samples. This indicates that microwave-steam synergistic degumming technology is a clean technology with the advantages of high sericin degumming rate, short degumming time, low energy consumption, and no use of any chemicals. This method is conducive to achieving better and faster sustainable development.
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Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Minghui Bai,Ruichong Chen,Xian Liu,Haoying Li,Jing Li,Heping Huang,Man Song,Qiuping Zhang,Yuanjie Su,Haomin Wang,Ming Xu,Guangzhong Xie
The tide of new energy vehicles and modern semiconductor devices releases a myriad of graphite anode and graphite target wastes. Recycling graphite wastes for catalysis preparation turns out to be a win-win and efficient way to deal with rampant environmental pollution. In this work, a graphite target waste was efficiently recycled into 2D few-layer graphite as the raw materials for the subsequent synthesis of nanoscale photocatalysts. The as-developed photocatalyst demonstrates a gain of 19 % in photocatalytic efficiency and superior photostability in sunlight-driven photodegradation of organic pollutants. Furthermore, the impact of temperature and pH value on the photocatalytic degradation efficiency was systematically investigated. The work affords an effective strategy for high-efficiency waste reclamation through full utilization of the graphite target wastes.
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Catalysts
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2024
·Vol. 14
·期 12
·858
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IF 3.8
Feng Feng,Yajing Liu,Li Yao,Xiuyu Wang
Creatine catalase (CAT), superoxide dismutase (SOD), and NADPH oxidase (NOX) are natural enzyme molecules that play a crucial role in regulating reactive oxygen species (ROS) in biological systems. They maintain life activities and eliminate pathogens by catalyzing various biochemical reactions. However, natural enzymes have some drawbacks in ROS control; they may lose activity under certain environmental conditions, such as high temperatures, extreme pH values, or the presence of organic solvents, which affects their stability and reliability in different applications. The construction of artificial nanozymes is an emerging technology that could probably solve the problems existing in natural enzymes. This study introduces a type of dendritic platinum–iron oxide (DPIO) nanozyme. The unique dendritic structure of this DPIO nanozyme provides a high surface area-to-volume ratio, and the addition of a platinum layer on the surface offers stability, thereby effectively enhancing the catalytic efficiency of producing reactive oxygen species (ROS). The combination of iron-based Fenton reactions and platinum-based Fenton-like reactions in this DPIO nanozyme drastically improves ROS catalytic efficiency. This artificial nanozyme has a high level of biosafety and displays no cytotoxicity. The development of DPIO nanozymes marks a significant advancement in the technology of artificial nanozymes.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Minglong He,Junjie Shi,Anyu Zhang,Yuying Xu,Qing Wu,Li Wen,Qi Hong,Yang Yue,Siliang Wang
The plentiful and renewable nature of iodine confers metal-iodine batteries (MIBs) a benefit in the advancement of energy storage technology with high energy and power densities. However, dendrite growth and susceptibility to electrolyte corrosion not only result in low anode utilization but also severely affect battery stability. This paper introduces an ammonium-iodine batteries (AIBs) structure that leverages the inertness of organic materials to iodide ions, thereby avoiding the electrolyte corrosion issues commonly found in the metal anodes of traditional MIBs. Additionally, the use of a non-metallic anode eliminates the impact of dendrite growth on battery stability and increases the anode utilization rate. Because of these features, AIBs attain a high specific capacity of 242mAh g −1 and preserve an 80.7 % capacity retention rate following approximately 2000 cycles at a current density of 10 A g −1 . We have also developed micro batteries and pouch cells to verify the feasibility of the structure. This work provides an innovative strategy for iodine batteries energy storage system.
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Batteries & Supercaps
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2025
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IF 4.7
Zenghao Li,Yujing Sheng,Xingfa Gao,Yuzhen Huang,Zhenzhong Han,Ruliang Zhang,Yinglun Sun
Graphical In this work, an intrinsiclly antifreezing hydrogel based on amphiphilic copolymer was designed, whose freezing point can be as low as −30 °C without adding any organic solvents and salts. By soaking the hydrogel in Zn(ClO 4 ) 2 solution to serve as the electrolyte of flexible zinc ion hybrid capacitor, the device achieved excellent electrochemical performance at −50 °C. Flexible zinc ion hybrid capacitors (ZIHCs) have attracted extensive research interest by virtue of their high safety and low cost. However, their low-temperature application remains limited due to the freeze of hydrogel electrolytes. Herein, we prepared an intrinsiclly antifreezing amphiphilic copolymer hydrogel based on hydrophilic monomer 2-Hydroxyethyl acrylate and hydrophobic monomer 1H, 1H, 2H, 2H perfluorooctyl methacrylate. Thanks to the hydrogen bond destruction effect of the hydrophilic units and the nano-confinement effect of the hydrophobic units, the hydrogel exhibited a freezing point as low as −30 °C, which was significantly lower than that of hydrogel prepared using pure hydrophilic monomers. In addition, the hydrogel also showed excellent adhesion performance, which contributed to the assembly of device and prevented layer-to-layer slippage during the device use. By soaking the hydrogel in Zn(ClO 4 ) 2 solution to serve as the electrolyte of the ZIHC, the device achieved excellent electrochemical performance at −50 °C. This work provides a new path for the design of antifreeze hydrogel electrolytes for ZIHCs.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Xuan Wu,Xingwu Guo,Chenjing Gao,Jing Luo,Lewen Nie,Juan Chen,Liming Peng
WO 3 -based optical hydrogen sensors, while advantageous due to their ignition-free operation and resistance to electromagnetic interference, face limitations due to slow response kinetics in hydrogen gasochromic processes. This study presents a novel post-treatment method using aqueous sulfuric acid, which significantly enhances the response speed of mesoporous Pt/WO 3 films. After treatment, the films exhibit an ultrashort response time of 2.4 s towards 4% H 2 /Ar, a marked improvement from 7.1 s prior to the treatment. The treated films also show excellent reversibility of 120 gasochromic cycles. The adsorbed acid layer is proved to be the cause of accelerated hydrogen gasochromic response. This exceptional performance is attributed to increased proton conductivity and the high porosity of the mesoporous structure. A modified model is proposed for the acceleration effect by acid post-treatment. Our post-treatment method represents a significant advancement in the reliable detection of hydrogen leaks at room temperature.
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CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Bohua Li,Jingning Lai,Fengling Zhang,Wen Sun,Zhengqiang Hu,Boshun Gui,Nan Chen,Li Li,Feng Wu,Renjie Chen
LiI in Li-O 2 batteries has shown promise in reducing charge overpotential. However, the shuttle effect of oxidated iodine species (OISs) can lead to lithium metal corrosion and loss of OISs. During the discharging process, these iodine species can undergo side reactions, resulting in the accumulation of LiOH and other parasitic products, which in turn accelerates battery failure. In this work, we have drawn inspiration from mussel protein and utilized a simple co-deposition method to form a robust biomimetic functionalized coating on the surface of the glass fiber separator. This was achieved by grafting catechol/polyamine (CA/PA) with 11-mercaptoundecanoic acid (MUA). This separator exhibits strong electrostatic repulsion towards negatively charged OISs and, conversely, electrostatic attraction towards Li + , this dual action effectively suppresses the shuttle effect and facilitates Li + transport. When equipped with this modified separator, the Li-O 2 battery effectively reduces the accumulation of LiOH and demonstrates significantly enhanced rate performance and cycle stability. Our findings provide a versatile approach for the design of modified separators for Li-O 2 batteries with redox mediators (RMs).
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Haoyang Xu,Yage Zheng,Yue Shen,Chaoqun Mu,Zhiqiang Zhang,Zhixian He,Yao Wang,Juanqin Xue,Liang Zhang
In this work, the photocatalyst BiOCOOH/BiYO 3 /Chitosan (CS) was prepared by using CS as the carrier and adsorbent. The performance of the material was studied through the photocatalytic degradation of tetracycline (TC) in water. Theoretical calculations and experiments demonstrate that the formation of BiOCOOH/BiYO 3 heterojunctions improves the separation of photogenerated carriers and the absorption of visible light by the material. The introduction of CS improves the difficulties in material recovery, demonstrating exceptional degradation ability for TC under the action of adsorption and photocatalysis. Adsorption kinetics studies indicate that the adsorption of TC by BiOCOOH/BiYO 3 /CS fits the pseudo-second-order model better, while the adsorption at different concentrations of TC is more suitably described by the Freundlich isotherm model. The synthesis of BiOCOOH/BiYO 3 /CS was confirmed by the analysis of XRD, XPS, and FTIR. UV–vis DRS showed that the synthesis of BiOCOOH/BiYO 3 /CS broadened the range of light absorbed by the material. The testing results of PL and transient photocurrent density indicate that BiOCOOH/BiYO 3 exhibits a higher efficiency in separating photogenerated charge carriers. After 5 cycles of reuse, the degradation efficiency can still reach 90 % of the initial efficiency, indicating that CS-based photocatalytic composite catalysts have practical application potential in the field of water pollution treatment.
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BIOMATERIALS
·
2024
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IF 12.8
Yanzhen Sun,Yao Li,Xiaokang Ding,Pan Xu,Xiaodong Jing,Hailin Cong,Hao Hu,Bing Yu,Fu-Jian Xu
Chronic diabetic wounds are difficult to treat due to imbalanced inflammatory responses, high blood glucose levels, and bacterial infections. Novel therapeutic approaches based on nucleic acid analogues have been proposed, with unique advantages in improving angiogenesis, increasing collagen synthesis, and exerting anti-inflammatory effects. However, the inherent electronegativity of nucleic acids makes them less susceptible to cellular uptake. In this paper, a kind of near infrared (NIR)-responsive nanocomposite hydrogel loaded with nucleic acid vectors was proposed for promoting wound healing. The redox system composed of molybdenum disulphide nanosheets (MoS 2 NSs) initiated the copolymerization of quaternized chitosan containing double bonds and N -isopropylacrylamide (NIPAAm) to form the matrix. In addition, MoS 2 NSs with photothermal conversion performance endow the nanocomposite hydrogel to have NIR-response property and act as physical crosslinking points in the matrix. Polydeoxyribonucleotides (PDRN), which have the effect of promoting wound healing, were made into nucleic acid vectors, and loaded into the NIR-responsive hydrogel. MoS 2 NSs can convert NIR irradiation into heat, causing phase transitions of temperature-sensitive segments that trigger volume contraction of the hydrogel to extrude the nucleic acid vector. Promoting angiogenesis, slowing inflammation, and guiding tissue regeneration were demonstrated in the diabetic wound model treated with the NIR-responsive nanocomposite hydrogel.
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Journal of Materials Chemistry C
·
2024
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IF 5.7
Tonghui Zhao,Yuqing Zhang,Lifei Wu,Qitong Zhong,Wei Xie,Bo Li,Dongling Geng,Haibo Zeng
In this research, we present an innovative, environmentally friendly, and cost-effective alcohothermal method for synthesizing Mn2+ and Mn2+–Cu+ doped 0D Cs3ZnCl5, a green luminescent material, marking the first time this approach has been reported. An exhaustive analysis of the luminescence properties of both undoped and doped Cs3ZnCl5 was conducted, with a particular emphasis on the energy transfer mechanisms in the Mn2+ mono-doped and Mn2+–Cu+ co-doped systems. The results demonstrate the successful construction of an efficient energy transfer pathway that significantly enhances the luminescence efficiency of Cs3ZnCl5:Mn2+. Specifically, the photoluminescence quantum yield of Mn2+ within the Cs3ZnCl5 matrix has been improved from 51.6% to 71.1%, thanks to the Cu+ codopant acting as an effective energy transfer mediator. A mechanism for the luminescence and energy transfer phenomena observed in the Mn2+–Cu+ co-doped Cs3ZnCl5 system has been also proposed. Furthermore, to assess the practical applicability of the synthesized materials, their structural and photoluminescent stability were evaluated. In essence, our study presents a promising solution to current challenges in the synthesis of advanced luminescent materials and opens up new possibilities for harnessing the potential of Mn2+-activated 0D metal halides in optoelectronic applications.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2024
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IF 4.1
Shun Cao,Jianbang Ge,Biwu Cai,Yang Gao,Zichen Zhang,Zhihao Cheng,Zhijing Yu,Xin Lu,Shuqiang Jiao
Molten salt electrochemistry has been widely applied in fields such as electrochemical metallurgy, nuclear material processing, and low carbon techniques. The metal or carbon electrode are generally used as working electrode to reveal the electrochemical reaction mechanism or measure the reaction kinetics. However, these electrodes in high-temperature molten salts may suffer corrosion or oxidation due to the harsh environment, which resulted in errors in electrochemical measurements. In most cases, an insulating film was formed on the electrode surface. Herein we showed the influence of an insulating film on the electrochemical signals based on the experimental tests and numerical simulations. The apparent reaction kinetics gradually became sluggish with the increasing film resistance. The ultra-high film resistance led to the linear potential-current behavior during cyclic voltammetry. Moreover, several typical molten salt electrochemical systems with the existence of an insulating film have also been discussed.
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