CHEMISTRY-A EUROPEAN JOURNAL
·
2021
·Vol. 27
·期 55
·13819-13827
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IF 5.236
Pan Liang,Wen-Li Lian,Zhi-Hong Liu
Highly efficient inorganic phosphors are crucial for solid-state lighting. In this paper, a new method of low-temperature self-reduction was used for preparing a highly efficient deep blue-emitting phosphor of Ca[B 8 O 11 (OH) 4 ] : Eu 2+ (CBH : Eu 2+ ). The crystal structure, morphology, chemical state, and photoluminescence (PL) properties of the CBH : Eu 2+ phosphor have been investigated. By using the screened hybrid function (HSE06), the band gap ( E g ) of CBH was calculated to be 7.48 eV, which is a necessary condition for achieving high quantum yield phosphors. The experiment results show that almost all the added raw materials of Eu 3+ can be reduced to Eu 2+ in CBH crystal under a non-reducing atmosphere. The CBH : Eu 2+ phosphor shows a broad excitation spectrum centered at 277 and 327 nm in the range of 220 to 400 nm, and a narrow-band emission spectrum centered at 428 nm in the range of 400 to 500 nm, with a full width at half maximum (fwhm) of 42.35 nm. Under UV radiation, the CBH : 2 %Eu 2+ exhibits high photoluminescence quantum yield (PLQY=95.0 %), high external quantum efficiency (EQE=31.1 %), and ultra-high color purity (97.6 %). The PL intensity of CBH : 2 %Eu 2+ remains 62.6 % of the initial intensity at 150 °C. Finally, the white light-emitting diodes (WLED) fabricated by CBH : 2 %Eu 2+ , excited by a 365 nm chip, presents outstanding performances with a luminous efficacy (LE) of 13.9 lm/W, a color rendering index (CRI) of 89.4, and a correlated color temperature (CCT) of 5825 K. The above results show that CBH : Eu 2+ can be used as a promising blue phosphor for WLED. This new method of low-temperature self-reduction can be applied to design and prepare other new types of highly efficient phosphors. Graphical Through a new method of low-temperature (only 350 °C) self-reduction, a highly efficient deep blue-emitting phosphor Ca[B 8 O 11 (OH) 4 ] : Eu 2+ was prepared, with a high PLQY of 95 % and a color purity of 97.6 %. Then, a WLED fabricated by the as-prepared CBH : 2 %Eu 2+ presents outstanding performance with a luminous efficacy (LE) of 13.9 lm/W, a color rendering index (CRI) of 89.4, and a correlated color temperature (CCT) of 5825 K.
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高影响因子
POLYHEDRON
·
2022
·
IF 2.975
Yan-Ling Deng,Wei Li,Chun-Yang Pan
Two new metal hybrid borates , Na[Ni(py) 2 ] 2 ·[(C 4 H 2 O 6 ) 2 B]·H 2 O (py = pyridine) ( 1 ) and [Cu(H 2 O) 2 (1-EI) 4 ]·[B 5 O 6 (OH) 4 ] 2 ·H 2 O (1-EI = 1-ethylimidazole) ( 2 ), have been successfully synthesized. 1 features an interesting structure based on mixed borate-tartrate motifs. Two tartrate anions are condensed with one BO 4 to form the hybrid anionic group [(C 4 H 2 O 6 ) 2 B] 5− . The structure of 2 is composed of [B 5 O 6 (OH) 4 ] − clusters and [Cu(H 2 O) 2 (1-EI) 4 ] 2+ complexes, which exhibits hydrogen-bonded network formed by [B 5 O 6 (OH) 4 ] − clusters. These compounds are further confirmed by FTIR, PXRD and UV–vis. In addition, the catalyst prepared from 2 shows excellent electrocatalytic oxygen reduction reaction (ORR) activity.
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Journal of Energy Storage
·
2024
·
IF 8.9
Hao Chen,Si-Miao Huang,Dong-Ting Zhang,Min-Peng Li,Chen-Yang Li,Yu-Ping Qiu,Xiao-Rui Wang,Tian-Peng Xu,Mao-Cheng Liu
The self-stacking of MXenes-Ti 3 CN limits the accessibility of nanochannels , reduces the ion diffusion kinetics, and hinders its application in alkali metal ion storage field. This study proposes a point-to-point mortise and tenon joining strategy to fabricate a composite structure of 1,4-phenylenediacetic acid-Ti 3 CN (1,4-PDEA-Ti 3 CN) by grafting rigid and flexible 1,4-phenylenediacetic acid (1,4-PDEA) into the amino-functionalized Ti 3 CN interlayers. The rigid and flexible 1,4-PDEA contributes to a pillar effect in the layered structure of Ti 3 CN, which is benefit to prevent the self-stacking and maintain a stable 2D layered structure. As a result, the interlayer spacing of Ti 3 CN is expanded from 1.20 to 1.46 nm and the Na + diffusion coefficient is improved from 1.16 × 10 −6 to 1.99 × 10 −6 cm 2 s −1 after point-to-point 1,4-PDEA grafting. The 1,4-PDEA-Ti 3 CN achieves a reversible discharge specific capacity of 202.3 mAh g −1 at a current density of 0.1 A g −1 after 770 cycles. Even at a high current density of 5 A g −1 , the 1,4-PDEA-Ti 3 CN still possesses a reversible discharge specific capacity of 137 mAh g −1 and it still maintains the high specific capacity of 256.1 mAh g −1 when the current density comes back to 0.1 A g −1 . This point-to-point mortise and tenon joining strategy provides a novel approach for designing other 2D energy storage materials with long cycle stability and high-rate capability.
研究领域:
材料科学
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电化学储能
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纳米材料
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能源化学
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二维材料
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IRANIAN POLYMER JOURNAL
·
2014
·Vol. 23
·期 11
·899-906
·
IF 1.469
Lai Jianbin,Yang Fafu,Guo Hongyu,Jiao Ziyu
By introducing 1,2,3-triazole-ester groups on thiacalix[4]arene based on click chemistry and then ammonolysis with ethylenediamine, diethylenetriamine or triethylenetetramine, three novel 1,2,3-triazole-modified thiacalix[4]arene polymers were conveniently prepared in “4+2” condensation mode in ideal yields. The structures of polymers 4a–4c were confirmed by elemental analysis, FTIR and 1 H NMR spectra. The surface morphologies of polymers 4a–4c were investigated by SEM micrographs. The M
n
of novel polymers 4a–4c indicated approximately 18–20 calixarene units in each polymer molecule. The dye adsorption abilities of polymers 4a–4c for series of organic dyes (alizarin green, orange I, neutral red (NR), Congo red (CR), orange G (OG), crystal violet, Victoria blue B and methylene blue) were studied by solid–liquid adsorption experiments. The adsorption experimental results implied that they had excellent adsorption abilities for tested organic dyes. The highest adsorption percentage reached 97 % for OG. The best saturation adsorption capacities for NR and CR were as high as 1.282 and 1.407 mmol/g, respectively. These novel polymers possessed stable adsorption abilities in the scopes of pH 5–9 and had good reused properties after desorption. The adsorption mechanism proposed that not only dipole interaction, electrostatic interaction and hydrogen bonding interaction, but also the π–π stacking interaction plays important role in binding dyes.
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ACS Sustainable Chemistry & Engineering
·
2026
·Vol. 14
·期 29
·13042-13055
·
IF 7.6
Lau Chun-Yin,Li Xinwei,Zhang Yanlin,Rangarajan Goutham,Tse Ho-Yin,Zhuang Huichuan,Leu Shao-Yuan,Farnood Ramin R.
In this study, an amorphous carbon-rich carbon nitride photocatalyst was prepared by nitric acid treatment of pyrolyzed melamine followed by nitrogen annealing. The resulting semiconductor material exhibited an up-shifted valence band that enhances the oxidizing power of photogenerated holes, enabling selective C α −C β bond cleavage of 2-phenoxy-1-phenylethanol (2-POE). Using 1.5 g L −1 of the optimized photocatalyst in acetonitrile, 2-POE underwent first-order conversion with a reaction rate of 2.55 h −1 under a 9 W blue LED light source. Product analysis showed the formation of benzaldehyde as the major product, confirming C−C bond scission with 93.1% selectivity. In addition, ring-opening reactions were observed, producing fumaric and maleic acids as the by-products. Photocatalytic depolymerization of organosolv lignin further demonstrated ring opening of the β-O-4 linking motifs, forming dicarboxylic acids analogous to those generated from 2-POE. These demonstrate a metal-free photocatalytic platform capable of promoting β-O-4 bond cleavage in lignin model compounds and inducing photocatalytic structural modification of organosolv lignin, accompanied by the formation of low-molecular-weight aliphatic dicarboxylic acids.
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BIOMASS & BIOENERGY
·
2026
·
IF 7
Yuhao Shi,Weiping Tang,Fei Ge,Xiaohui Yang,Minghao Zhou
FJH prepared carbon-coated Co-Ni-Al LDH catalysts and suppressed metal sintering. • Co 1 Ni 2 Al-850 catalyst afforded 100% vanillin conversion and 94.3% MCH yield in isopropanol solvent. • Ni species activated isopropanol to produce active hydrogen, while oxophilic Co promoted the cleavage of C-O bonds. • The Co 1 Ni 2 Al-850 catalyst effectively converted various lignin model compounds under mild conditions. Hydrodeoxygenation (HDO) is a key process for upgrading lignin derived bio-oil to high-quality fuels and chemicals. In this study, Co x Ni y Al-T catalysts with varying Co/Ni molar ratios and calcination temperatures were fabricated through flash Joule heating assisted carbon coating, with layered double hydroxides (LDHs) adopted as precursors. These catalysts were used for the hydrodeoxygenation of vanillin to 4-methylcyclohexanol (MCH). Under the optimized reaction conditions (180 °C, 2.5 h, 1 MPa N 2 ) with isopropanol serving as both hydrogen donor and solvent, the Co 1 Ni 2 Al-850 catalyst achieved nearly 100% vanillin conversion and a 94.3% yield of MCH. Based on various characterization results, Co 1 Ni 2 Al-850 catalysts exhibited suitable specific surface area, pore structure and acid sites. The excellent performance of Co 1 Ni 2 Al-850 catalyst was also attributed to the Co-Ni synergistic effect: Ni species accelerated the activation and dissociation of isopropanol to supply sufficient active hydrogen species for HDO; Co species promoted removal of methoxy groups in MMP. In addition, the presence of Al enhanced the structural stability. Based on the product distribution and characterization results, the possible reaction mechanism of the catalytic system was proposed. This study provides a new way for the development of efficient non noble metal catalysts for the hydrodeoxygenation system of biomass derivatives.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2026
·
IF 3.5
Jiaojiao Yu,Yi Zuo,Gudan Li,Bosong Zhang,Hong Yang,Xinyue Wang,Xinwen Guo
PO 4 3- assists the one-step synthesis of highly active TS-1 containing Ti-VI species. • PO 4 3- induces plate-like TS-1 morphology and creates hierarchical micropores. • Ti-VI is constructed by Ti-O-PO 4 x- intermediate from bonding of Ti-OH with PO 4 3- . • TS-MAP-0.2 doubles the activity for 1-hexene epoxidation than additive-free TS-1. Titanium silicalite-1 (TS-1) is an efficient and green oxidation catalyst that has been employed in various industrial processes. In our previous work, a highly active TS-1 catalyst bearing Ti(OSi) 2 (OH) 4 (Ti-VI) was successfully prepared via post-treatment with alkaline solutions. Herein, a novel synthesis strategy is developed using monoammonium phosphate (MAP) as a regulator to fabricate thin TS-1 crystals with Ti-VI species, eliminating the complicated post-treatment operations. The study reveals that although the added phosphate anion (PO 4 3- ) is not incorporated into the MFI framework, it significantly affects the crystallization behavior of TS-1 during the synthesis. Essentially, PO 4 3- exerts two functions. First, it regulates the Ti species in the resulting TS-1 by forming Ti-O-PO 4 x - intermediates which not only promotes the formation of Ti-VI but also the construction of large micropores (0.7−0.8 nm) around Ti atoms in TS-1. Furthermore, PO 4 3- induces the formation of plate-like crystal morphology of TS-1. The obtained TS-1 catalyst exhibits remarkably enhanced catalytic performance in 1-hexene epoxidation, which is ascribed to the concurrent o ptimization of its intrinsic catalytic activity and mass transfer diffusion properties. Download: Download high-res image (354KB) Download: Download full-size image
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Cell Reports
·
2026
·Vol. 45
·期 6
·
IF 7.7
Yifang Chen,Qian Zhang,Na Li,Zhaoqi Zhang,Tong Lei,Han Guo,Hezhe Lu,Yong Zhao
Dendritic cells (DCs) are professional antigen-presenting cells that exhibit significant heterogeneity in development and function. This study found that among 17 cytokines screened, only IL-33 could induce DCs to display a Th9-type cytokine profile, including IL-9, IL-4, and IL-13, in vitro . The response of DCs to IL-33 was synergistically enhanced by TGF-β and IL-4, defining a distinct subset termed DC9. Transcriptomic analysis revealed that DC9 possesses a unique gene expression signature, particularly in cytokine/chemokine clusters, compared to conventional DCs. Mechanistically, DC9 polarization depends on the JAK-STAT6-IRF4 signaling pathway. Functionally, DC9 preferentially drives naive CD4 + T cell differentiation toward Th9 cells in vitro . In an ovalbumin-induced allergic airway inflammatory mouse model, DC9 cells were detectable in lungs and adoptive transfer of DC9 exacerbated disease severity, and increased pulmonary Th9 cells. Collectively, we identify DC9 as a novel DC subset induced by IL-33/TGF-β/IL-4 through the JAK-STAT6-IRF4 axis, which promotes Th9 differentiation and aggravates allergic airway inflammation.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·121838
·
IF 7.5
Yan Wang,Chang Liu,Rong Fu,Chao Wang,Xin Chong,Yuqi Shi,Yuelan Zhang
Although extensive research has explored modulating the built-in electric field (BIEF) and interfacial dipole electric field (IDEF) individually, a strategy leveraging their synergistic interplay for bidirectional electron regulation remains scarcely explored. Herein, a bifunctional FeCoNiP/P-doped g-C 3 N 4 (FeCoNiP/PCN) heterojunction was constructed and confirmed by TEM analysis. XPS and DFT analyses confirmed the co-existence of synergistic dual electric fields: a BIEF directed from PCN to FeCoNiP and an oppositely oriented IDEF, which cooperatively establish a bidirectional charge-transfer channel. This unique dual-field configuration drove highly efficient spatial charge separation, as evidenced by significantly quenched photoluminescence (PL), diminished charge-transfer resistance (EIS), and a markedly enhanced photocurrent response. The synergistic electric fields enabled bidirectional electron flow, thus enabling the simultaneous photooxidation of 4-nitrophenol (4-NP) and its selective reduction to 4-aminophenol (4-AP). The optimized FeCoNiP/PCN heterojunction showed significantly enhanced catalytic performance, achieving a 91 % degradation of 4-NP within 1.5 h with a rate constant 4 times and 25 times higher than pristine PCN and FeCoNiP, respectively. Moreover, it exhibited bifunctional performance, reducing 100 mg/L 4-NP nearly completely to 4-AP within only 4 min. The superior performance is primarily attributed to the synergistic interplay between the BIEF and IDEF, which efficiently lowers energy barriers and orchestrates directional electron transfer, as elucidated by combined experiments and theory. This study proposes a feasible strategy to regulate bidirectional electron flow via synergistic dual electric fields in heterojunctions, which opens a new avenue for designing high-performance bifunctional catalysts to tackle complex environmental issues.
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高影响因子
ANALYTICAL CHEMISTRY
·
2026
·
IF 6.7
Chenxi Wang,Linzi Huang,Yixi Xie,Pengcheng Zhao,Junjie Fei
2-Chloro-4-nitrophenol (2C4NP) is a traditional organic pollutant whose toxicity constitutes a significant threat to both human health and environmental safety. Therefore, developing a method for the accurate detection of 2C4NP in natural environments is imperative. Consequently, we develop a photoelectrochemical sensing platform based on MWCNTs@In2S3/In2O3/GCE in this work. During the construction process, it is discovered that the introduction of MWCNTs accelerated the electron transport rate, which improved the separation efficiency of photogenerated electron–hole pairs in In2S3. Meanwhile, the MWCNTs@In2S3/In2O3 composite materials formed by MWCNTs@In2S3 and In2O3 not only exhibit an S-scheme heterojunction but also preserve the intrinsic advantages of MOFs-derived materials. This synergistic structure endows the composite materials with excellent optoelectronic performance and adsorption capability. Thus, the constructed photoelectrochemical sensing platform demonstrates promising potential for detecting 2C4NP, with a linear detection range from 3 nM to 5 μM. However, compared to some existing platforms, its detection range remains relatively narrow, which may represent an area for future improvement.
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高影响因子
JOURNAL OF MEDICINAL CHEMISTRY
·
2026
·
IF 7.3
ZiYi Wang,SiJia Lin,Xue Dong,Jin Cao,Rong Zhao,Lin Wu,Song Shen
Dipeptidyl peptidase-4 (DPP-4), a key regulator of glucose metabolism that cleaves glucagon-like peptide-1 (GLP-1), is a critical therapeutic target for type 2 diabetes. Conventional DPP-4 inhibitors like alogliptin act through competitive active-site inhibition, requiring sustained exposure, which can lead to resistance and off-target effects. Here, we leveraged proteolysis-targeting chimera (PROTAC) technology to develop a heterobifunctional DPP-4 degrader. The PROTAC (DeDPP4) was synthesized by conjugating alogliptin, a high-affinity DPP-4 ligand, with a cereblon (CRBN)-recruiting E3 ubiquitin ligase ligand. The DeDPP4 demonstrated a dose-dependent DPP-4 depletion effect in A549 cells, with a maximal degradation rate of >80%. In an in vivo experiment, a single administration of the DeDPP4 (10 mg/kg) elicited prolonged glycemic control, maintaining reduced blood glucose levels over 60 h, which was 5 times that of alogliptin. The DeDPP4 induced sustained GLP-1 elevation and enhanced glucose tolerance, correlating with DPP-4 degradation in liver and adipose tissues.
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高影响因子
MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 5
·321
·
IF 5.4
Liu Shicong,Zhang Yuanyuan,Zhao Hongyang,Liu Junqiu,Hou Chunxi
A “turn-on” fluorescence sensor was developed for cholesterol detection on the basis of fluorescence resonance energy transfer (FRET) between the organic fluorophore 1-(4-(1,2,2-triphenylvinyl)phenyl)pyrene (TPE-Py) and a gold nanoparticle-β-cyclodextrin conjugate (AuNPs-β-CD). Mechanistically, the AuNPs-β-CD, an energy acceptor, was synthesized via Au–S bonding, and TPE-Py transferred energy to the AuNPs via FRET, resulting in fluorescence quenching of TPE-Py. In the presence of cholesterol, which has a stronger binding affinity for the β-CD cavity, TPE-Py was competitively displaced, enabling the recovery of the fluorescence signal. This sensor has high sensitivity for cholesterol, with a low detection limit of 66 nM and a linear range of 0.5–30 µM. Furthermore, the sensor was successfully used to determine the cholesterol content in food samples with satisfactory recoveries, revealing its potential for food analysis.
Section
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高影响因子
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