CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Dan Yu,Jiahong He,Taiping Xie,Qiang Xu,Quanxi Zhu,Jun Yang,Jibin An,Feng Ye,Jiankang Wang,Bin Xiang
It is of significant to explore activation mechanism of peroxymonosulfate (PMS) for development of more active and robust metal oxide catalyst. Here, we discover a key role of Sr-O bond in boosting the catalytic activity of SrCo 0.81 Fe 0.19 O 2.78 perovskite. In this catalytic system, oxygen vacancy, Fe 4+ /Fe 3+ , and Co 3+ /Co 2+ redox cycles synergistically enhanced catalytic activity of SrCo 0.81 Fe 0.19 O 2.78 for antibiotic degradation with 100 % Florfenicol (FF) removal in 27 min. Moreover, this catalyst presented excellent stability although oxygen vacancy had a decrease after reuse. The influential factors including coexisting anions on FF degradation were systematically studied. Comparative experiments and theoretical calculation indicate Sr-O ionic bond provides electrons for Co-O and Fe-O covalent bonds to accelerate Fe 4+ /Fe 3+ , and Co 3+ /Co 2+ redox cycles for PMS activation . Finally, the FF degradation pathway over SrCoFe perovskite/PMS system was identified by LC-MS/MS.
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Carbohydrate Polymer Technologies and Applications
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2021
·
IF 0
Renliang Lyu,Zeqin Li,Cheng Liang,Cheng Zhang,Ting Xia,Ming Wu,Yi Wang,Lichun Wang,Xiaogang Luo,Caili Xu
In this work, due to its excellent adsorption performance, biodegradability, and low toxicity, chitosan was used as the raw material to synthesize a series of new oil-in-water (O/W) type crude oil demulsifiers. First, an acyl group was introduced onto the chitosan molecule. Then, sodium chloroacetate was used as a carboxymethylation reagent to introduce a carboxymethyl group into the acylated chitosan. Furthermore, polyethylene glycol monomethyl ether with an average molecular weight of 1900 (MPEG-1900) was used to react with acylated carboxymethyl chitosan to synthesize chitosan-based O/W type demulsifiers. The molecular structures of the synthetic chitosan derivatives were characterized using Fourier-transform infrared spectroscopy (FTIR) and 1 H nuclear magnetic resonance techniques. The results showed that the surface tension decreased with an increase in the concentration of polysaccharide demulsifiers, which included MPEG-1900-A 4 CMC, MPEG-1900-A 6 CMC, and MPEG-1900-A 8 CMC. The demulsification efficiency of these synthetic demulsifiers reached a maximum over 100 min at a concentration of 200 ppm at 50 °C. The as-synthesized chitosan derivatives showed good demulsification performance.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-13
·
IF 15.7
Huang Jun,Yang Qirui,Hu Anyi,Liao Zhu,Zhang Zhengxi,Zheng Qinfeng,Ren Zhouhong,Zheng Shun,Zhang Yixiao,Yang Xiaolong,Xu Zhenming,Zhang Le,Zhu Daming,Wen Wen,Liu Xi,Orita Akihiro,Saito Nagahiro,Wang Liguang,Xia Yongyao,Chen Liwei,Lu Jun,Yang Li
Developing lithium-ion batteries with high specific energy and fast-charging capability requires overcoming the potential-capacity trade-off in negative electrodes. Conventional fast-charging materials (e.g., Li 4 Ti 5 O 12 , TiNb 2 O 7 ) operate at high potentials (>1.5 V vs. Li + /Li) to circumvent lithium plating, yet this compromises specific energy. A viable strategy for enhancing the specific energy is to reduce the potential while avoiding the lithium plating risk; however, the underlying mechanisms remain unclear. Here we demonstrate that enhancing Titanium-Oxygen covalency through pseudo-Jahn-Teller Effect distortion in Ruddlesden-Popper perovskites enables low-potential operation. The Li 2 La 2 Ti 3 O 10 negative electrode exhibits a working potential of 0.5 V vs. Li + /Li with initial 139.3 mAh g −1 at 5 A g −1 and 72.9% capacity retention after 5000 cycles. Full cells with LiNi 0.8 Co 0.1 Mn 0.1 O 2 positive electrodes deliver 3.45 V average discharge voltage-50% higher than conventional Li 4 Ti 5 O 12 | |LiNi 0.8 Co 0.1 Mn 0.1 O 2 systems-achieving 100 mAh g −1 at 4 A g −1 . Mechanistic analysis reveals low Li⁺ migration barriers and stable Ruddlesden-Popper perovskite frameworks enable rapid ion transport.
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PubMed
高影响因子
CHEMICO-BIOLOGICAL INTERACTIONS
·
2020
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IF 3.723
Mingfei Wu,Xingxing Zhu,Yilong Zhang,Min Wang,Tongtong Liu,Jianfei Han,Jun Li,Zeng Li
A series of 7- O -amide hesperetin derivatives were subjected to multi-target biological evaluation of anti-Alzheimer's disease. Most of the compounds showed good in vitro inhibitory activity against cholinesterase , of which compound 7c (7- O -(4-(morpholinoethyl)-acetamide) hesperetin) was the most effective anti-eqBuChE derivative (IC 50 = 0.28 ± 0.05 μM) and exerted neuroprotective effects. Further biological evaluation found that compounds 4d , 4e and 7c showed strong antioxidant, anti-Aβ self-aggregation and anti-neuroinflammatory activities. Compound 7c could inhibit the expression of iNOS and COX-2 proteins and prevent LPS-induced inflammatory response in BV2 cells. In addition, compound 7c could chelate biometal ions such as Cu 2+ and Zn 2+ . In the vivo study, the MWM test confirmed that compound 7c could improve the cognitive impairment caused by scopolamine . In summary, the above studies have shown that the optimized compound 7c has great development potential as MTDL for the treatment of AD.
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PubMed
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 51
·29141-29146
·
IF 2.936
Chuncheng Ban,Ling Li,Liuxiao Wei
Boron-nitride nanotubes (BNNTs) are a common one-dimensional (1D) nanostructure that possess piezoelectric potential due to ion-covalent boron-nitride (BN) bonding. Harnessing the advantages offered by high-stability BN structures, these materials have been used for various new applications such as nanogenerators, nanotransistors, and nano-artificial eardrums. In this paper, we used nano-iron oxide red as a catalyst and boron powder in an aqueous dispersion as the boron source to synthesize high-purity O-self-doped BNNTs and film. We investigated the electrical properties of O-self-doped BNNTs and the piezoelectricity of freestanding BNNT film and demonstrated that the electrical properties of O-self-doped BNNTs improved dramatically compared to those of non-doped BNNTs. We also analyzed the band gaps and density of states (DOS) of the O-self-doped BNNTs with the Spanish Initiative for Electronic Simulation with Thousands of Atoms (SIESTA) code to explain the improvement. In addition, we revealed the piezoelectric voltage coefficient g31 of O-self-doped BNNTs (0.28 V m N−1) network films, which can guide future applications for vibration nanosensors and transducers under extreme conditions.
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PubMed
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Reaction Kinetics Mechanisms and Catalysis
·
2024
·
IF 1.7
Lin Guangqiang,Mao Chunfeng,Li Menghua,Wang Ziyi,Li Qinyi,Zhan Jiaqing,Liu Junsheng
In this study, Zn–W–Bi–O catalysts with a sandwich structure were prepared by mixing zinc tungstate and bismuth nitrate to form bismuth tungstate at the interface. The catalyst was composed of bismuth nitrate as the upper layer, zinc tungstate as the lower layer, and phase interface (bismuth tungstate) as the core. The generation of phase interfaces provides a new reaction mechanism for catalytic processes. Based on the different intermediate state changes in the reaction process, the Zn–W–Bi–O catalysis system can be divided into H-S Mechanism, B-R Mechanism, and P-G Mechanism. These reaction mechanisms will simultaneously react with H 2 O 2 to generate various transition states, which will cooperatively oxidize sulfur atoms to remove them. The structural characteristics and stability of Zn–W–Bi–O catalysts were determined. There are strong stability and catalytic efficiency for Zn–W–Bi–O catalysts. The desulfurization rate can be close to 100% under optimal conditions (Catalyst of 0.02 g, ionic liquids of 0.5 mL, H 2 O 2 of 0.2 mL, model oil of 5 mL, 80 °C). Zn-W-Bi-O-2 catalysts lead to 3 times improvement in ODS activity for the upper layer and 1.25 times improvement in ODS activity for the lower layer. The catalytic reaction mechanism was obtained by the structure-activity relationship.
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JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Wen-Jie Gao,Ming-Yue Tian,Xing-Hui Ren,Hao-Rui Zhang,Xi-Wen He,Wen-You Li,Yu-Kui Zhang
Nitrite (NO 2 − ) is widely present in the natural environment and human daily life. Excessive NO 2 − can cause harm to the environment and human health. Herein, silicon nanoparticles (SiNPs) with a fluorescence quantum yield of up to 70 % were synthesised using a one-pot hydrothermal method and combined with the common and inexpensive o -phenylenediamine (OPD) to achieve the detection of NO 2 − . Upon the addition of NO 2 − , the blue fluorescence of the SiNPs was quenched due to static quenching and Förster resonance energy transfer (FRET), while the yellow fluorescence of benzotriazole, the reaction product of OPD and NO 2 − , was enhanced, resulting in the fluorescence color change from blue to yellow. Based on these phenomena, a ratiometric fluorescence sensor integrated with smartphone imaging technology was developed. This sensor is notable for its portability, cost-effectiveness, and satisfactory detection limits (0.016 μM for ratiometric fluorescence and 1.64 μM for smartphone imaging). Importantly, it demonstrates high reliability and practicability in detecting NO 2 − in real water and food samples. This broadens the application of SiNPs in the sensing field and introduces new possibilities for NO 2 − detection in complex sample matrices.
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PubMed
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Fanyong Yan,Yao Zhang,Yating Li,Juanru Huang,Yidi Wang
Metal-organic skeletons (MOFs) with low conductivity and insufficient response to visible light have limited their development in the field of photocatalysis. The adjustable pore structure, large surface area, and ease of surface modification of MOFs provide opportunities to further improve the photocatalytic performance. This study reports the synthesis of flower-like zinc-based MOFs with hierarchical structure using two ligands as organic linkers. The heterojunction constructed by doping graphitic carbon nitride (g-C 3 N 4 ) catalysts effectively tuned the energy band structure of the MOFs to adapt to specific photo responses. Especially, the introduction of the heteroatom O into g-C 3 N 4 (OCN) again adjusts its electronic structure and thus improves its visible light utilization. The further incorporation of carbon nitride quantum dots (CNQDs) improves the charge separation efficiency and facilitates the division of photogenerated electron-hole pairs. The catalyst exhibited excellent visible light trapping and electron transfer properties with 90.46 % tetracycline (TC) degradation within 60 min. The free radical burst experiments and results indicate that the key active substances in the catalytic process are ·O 2 - with h + . This study introduces a novel approach to developing MOF-derived materials with environmental functionality.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Huimin Li,Zhe Sun,Chenlong Dong,Xueli Zhang,Chengkun Lei,Baobao Jin,Qianqian Shen,Husheng Jia,Jinbo Xue
Photocatalytic non-oxidative coupling of methane is an attractive strategy for CH 4 to C 2 conversion, how to facilitate the photogenerated charge separation and accelerate the C–C coupling to promote the reaction kinetics remains a great challenge. Herein, a symbiotic r-Fe 2 O 3 /NiO heterostructure with robust interfaces is constructed in situ. The coherent interface not only provides unique Ni–O–Fe asymmetric sites, but also achieves the separation and transport of photogenerated charge. The unbalanced charge density distribution of two adjacent methyl or methylene at the Ni–O–Fe asymmetric site alleviates the dipole repulsion of the C–C coupling, and promotes C–C coupling to form C 2 hydrocarbons. Under visible light irradiation, the optimal r-Fe 2 O 3 /NiO performs a brilliant C 2 activity up to 71.00 μmol g −1 h −1 , and the C 2 H 4 yield can reach a high value of 40.46 μmol g −1 h −1 and the selectivity of 56.98 %. This work provides new insights into the coupling of C–C to generate C 2 hydrocarbons.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Amin Chen,Na Li,Chenxu Sun,Yanmin Qin,Luyao Qi,Huipei Zhang,Haifeng Bao
Both inorganic solid electrolytes and organic polymer solid electrolytes face limitations in practical applications due to their shortcomings. Inorganic solid electrolytes suffer from high interface impedance and poor mechanical properties, while polymer solid electrolytes struggle with low Li-ion conductivity, thermal stability and electrochemical stability. To overcome the drawbacks of single phase solid electrolytes while utilizing their respective advantages, composite solid electrolytes have emerged as a popular research direction in recent years. Typical composite solid electrolytes feature inorganic filler particles dispersed in a polymer matrix. In this work, we introduce a novel non-flammable composite solid electrolyte with inorganic matrix and inorganic fillers. The composite solid electrolyte was prepared by integrating a 3D Si-Zr-O-C inorganic fiber film with Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) particles that have high ionic conductivity via a vacuum impregnation process, which is all-inorganic solid state electrolyte. This unique design of established network structure provides fast Li-ion transport channels, enabling high ionic conductivity (2.3 × 10 −4 S cm −1 at room temperature). Furthermore, the Si-Zr-O-C/LLZTO (SLTO) composite electrolyte also exhibits superior flexibility, thermal stability, and electrochemical stability. The SLTO composite solid electrolyte presents a promising electrolyte candidate for next generation lithium ion batteries.
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高影响因子
Nano Today
·
2024
·
IF 13.2
Xue Wang,Lili Xia,Hui Cheng,Kexing Li,Wei Feng,Xinyue Dai,Yu Chen
Reactive oxygen species (ROS) can induce oxidative damage to biomolecules within tumor cells, making them suitable for tumor therapy. However, the effectiveness of these ROS in treating tumor cells is restricted due to their short half-life or short diffusion distance. Sulfate radicals (SO 4 • – ), with a longer half-life and higher oxidation potential , provide a compelling alternative. Herein, we propose an efficient strategy to activate peroxymonosulfate (PMS) and produce SO 4 • – and •OH by using ultrasound-mediated Cu 2+ /Cu + redox cycling, enabling oxygen-independent synergistic tumor therapy. Notably, this redox cycle ensures the continuity of effective Cu + catalytic sites and prevents adverse effects on healthy tissues. The density functional theory results demonstrate that the decisive copper valence-conversion step is derived from the ultrasound-induced excitations of electrons in spin-down bands of Cu 2 (OH)PO 4 . This ultrasound-controlled transition metal valence alteration enables in-situ activation of a nontoxic drug to produce toxic reactive X (X = O/S) species in an O 2 -independent manner, offering an efficient, adaptable and universal methodology for treating hypoxic tumors in living systems.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Zhangtao Liu,Shuhan Fu,Yuhui Wang,Zhenyang Xu,Yueguang Chen,Ning Xiao,Shangyi Li,Tingting Zhang
A novel spin-state engineering strategy was developed via La doping to break the “oxo wall” and boost high-valent Co(IV)=O generation for efficient per- and polyfluoroalkyl substances (PFASs) degradation. This was achieved by constructing unsaturated CoO 3 single atoms anchored on La-doped MCM-48 (CoLa@MCM-48) via one-pot synthesis, which enabled synergistic activation of peroxymonosulfate and ozone. The optimized catalyst achieved 99.5 % degradation of PFASs substitute sodium p-perfluorous nonenoxybenzene sulfonate (OBS) in 30 min, while maintaining robust performance across diverse water matrices. The incorporation of La induces asymmetric lattice strain through its large ionic radius and spin-orbit coupling, transforming the Co coordination geometry from conventional octahedral symmetry to an unsaturated trigonal planar CoO 3 configuration with a high-spin state, thereby enhancing the 88.8 % generation of Co(IV)=O. This work establishes heteroatom-mediated spin-state engineering for designing high-performance non-radical catalysts to remediate recalcitrant pollutants.
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