JOURNAL OF LUMINESCENCE
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2023
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IF 3.6
Wenhai Wang,Qing Chang,Ling Li,Jian-An Li,Dewu Yue,Shichen Su
Advances in polymeric matrices with ultralong and color-tunable phosphorescence were recently made, but their luminescence mechanism was not yet thoroughly understood. The current experimental and theoretical studies show that the red-shift of phosphorescence spectrum is caused by increasing the C–N and C=O of carbon dots in the polymeric matrix . In addition, theoretical calculations explain the charge transfer and spin orbit coupling of carbon dots in a system containing different covalent bonds . The phosphorescence emission color and lifetime can be modulated, which is applied into triple anti-counterfeiting of photo-stimulated-dependent color, time-dependent color, and time-dependent phosphorescence lifetime . In the application, the phosphorescence color of carbon dots in the polymeric matrix can be varied from deep blue (431 nm) to red (620 nm) with a maximal lifetime of 2.02 s and a maximum phosphorescence quantum yield of 20.1%. This work provides a new direction for the development of carbon dots with efficient and color-tunable ultra-long phosphorescence.
研究领域:
材料科学
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化学
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光子学
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纳米技术
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DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2026
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IF 6.7
Xiaopeng Shi,Jing Su,Qi Ouyang,Bingyan Sun,Linjia Yin,Xin Liu,Dingran Wang,Jianmeng Cen,Kaige Wang
Lignin-derived bio-oils contain abundant methoxyphenols exhibiting limited antioxidant activity, which requires their conversion to high-value polyphenols. This study develops titanium-loaded Hβ zeolite catalysts (xTi/Hβ) for the selective O-demethylation of methoxyphenols to catechols under subcritical aqueous conditions. Comprehensive characterization (XRD, XPS, STEM, NH₃-TPD, Py-FTIR) reveals that Ti exists as both framework-incorporated tetrahedral Ti⁴⁺ species (via Al³⁺ substitution) and surface-anchored anatase TiO 2 nanoparticles (NPs). The optimal 5Ti/Hβ catalyst maximizes synergistic effects: framework Ti sites enhance Brønsted acidity, while Ti NPs facilitate H 2 O enrichment near active sites. This achieves 99.46% conversion of 4-propylguaiacol to 4-propylcatechol. Applied to distilled bio-oil, 5Ti/Hβ reduces methoxyphenol content from 48.50 Area.% to 20.25 Area.% and increases total polyphenols from 25.39 Area.% to 43.64 Area.%. Catalyst stability challenges under prolonged hydrothermal conditions are identified for future optimization.
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DOI
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SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Shuxin Zhang,Kun Liu,Shuyuan Yu,Zifeng Lin,Yu Xie,Yanbin Jiang,Longfu Wei,Changlin Yu
Traditional propylene oxide (PO) production processes consume large amounts of organic feedstock and release hazardous by-products. The synthesis of PO via the epoxidation of propylene using O 2 is an ideal route offering 100% atomic economy. However, achieving high selectivity and high efficiency under mild conditions remains a significant challenge. In this study, we have developed a visible-light-driven tandem reaction system combining a carbon- and oxygen-co-doped three-dimensional spherical indium sulfide (C,O-In 2 S 3 ) photocatalyst with titanium silicate molecular sieve (TS-1), thereby achieving the distinctly selective oxidation of propylene at ambient temperature. Assembled from ultra-thin nanosheets, the three-dimensional structure of C,O-In 2 S 3 provides abundant active sites and mass transfer space, with carbon‑oxygen co-doping narrowing the bandgap and enhancing visible light absorption. In a pure water system, the H 2 O 2 yield of C,O-In 2 S 3 reached 1450.40 μmol·g −1 ·h −1 , which is 17.8 times that of pristine In 2 S 3 . Utilizing the excellent compatibility of the methanol/water system, the photocatalytic generated H 2 O 2 was directly employed in the TS-1-catalysed epoxidation of propylene, achieving a PO yield of 2230.03 μmol·g −1 within 2 h with a selectivity of 99.1%. This work applies sulfide-based photocatalysts to a tandem reaction involving photocatalytic H 2 O 2 production and propylene epoxidation, providing a new strategy for the green, safe and efficient synthesis of PO.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2025
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IF 11.3
Yingying Qian,Houyu Yu,Qihuan He,Dandan Fan,Gerben J. Zylstra,Hancheng Wang,Xing Huang
The extensive application of cyhalofop-butyl, an aryloxyphenoxypropionate (AOPP) herbicide, for weed control in rice fields inevitably results in environmental pollution and ecological toxicity. Microbial degradation of cyhalofop-butyl is garnering immense research attention. This study revealed that Sphingobium yanoikuyae B1 can efficiently degrade the cyhalofop-butyl, completely breaking down 30 mg/L within 12 h via ester bond hydrolysis, forming cyhalofop acid. A novel hydrolase gene cbeH (37.39% identity) was identified in B1. CbeH exhibited catalytic activity by hydrolyzing the ester bond (C-O) in cyhalofop-butyl and other AOPP herbicides, yielding AOPP acids. Additionally, it catalyzed the cleavage of the C-N bond in amide herbicides propanil and diuron, as well as the C-C bond in the aromatic compound 2-hydroxy-6-oxo-6-phenylhexa-2,4-dienoic acid. Sequence alignments and site-directed mutagenesis indicated the catalytic triad Ser-His-Asp in CbeH serves as active center cleaving C-O, C-C, and C-N bonds. Comparative analysis revealed the gene cbeH , highly conserved within Sphingomonads , was located within multiple insertion sequences on the plasmid of Rhodococcus strains. CbeH was widespread in Proteobacteria and Actinobacteria, with its host strains prevalent in aromatic-polluted environments. This study provides novel enzyme resources for remediating combined pollution and enhances our understanding of the genetic organization and environmental distribution of trifunctional pollutant-degrading genes.
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Jinfeng Jiang,Wei Xia,Yu Feng,Weihua Gu,Weiwei Wang,Cao Wu,Wenbo Du,Yong Yang,Hailiang Deng,Yusuke Yamauchi
Ceramic fibrous aerogels are promising lightweight thermal insulators, yet concurrently enhancing mechanical robustness, acoustic attenuation and electromagnetic (EM) wave absorption remains challenging because these functions demand conflicting architectures. Here we introduce a phase-transition-driven multiphase evolution strategy in Si Zr crystals combined with a one-step thermally induced core–shell conversion. This approach enables coordinated regulation of the chemical states, dislocation density and oxygen-vacancy concentration in Zr Si ceramic fibers, and forms a heterogeneous “oxide shell (ZrO 2 /SiO 2 )-carbide core (SiC/ZrC)” within each fiber. The resulting interfacial enrichment and improved impedance matching synergistically strengthen the aerogel and boost EM dissipation. The obtained ZSCO fibrous aerogels deliver a compressive stress up to 255.73 kPa, a minimum reflection loss of −21.87 dB and an average sound absorption coefficient of 0.61. Mechanistic analysis reveals a thermally driven, multimodal regulation pathway for tailoring multifunctional ceramic fibers, offering a scalable route to aerogels for extreme environments.
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SOLVENT EXTRACTION AND ION EXCHANGE
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2023
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IF 2
Dong Cao,Shuai Wang,Xin Ma,Jia Yang,Hong Zhong
Herein, a novel C=O–NOH-contained compound was synthesized and used in the extraction and recovery of copper from sulfate solution. Dodecyl phenyl ethyl hydroxamic acid (DPEHA) exhibited high selectivity to Cu(II) over the competing ions, and the separation factors (β) obtained were βCu/Zn = 227.370, βCu/Co = 199.094, βCu/Ni = 188.889, respectively. The separation effect was stronger than that of 2-hydroxy-5-nonyl acetophenone oxime. Meanwhile, extraction capacity of 0.10 g Cu(II) per gram DPEHA was reached, and the extracted Cu(II) can be stripped effectively. The investigation of extraction mechanism revealed that O atoms in C=O and O-H groups of DPEHA operate as active sites, which could powerfully chelate with Cu(II) by forming stable five-membered rings. The high copper extraction efficiency and selectivity associated with a simple synthesis of DPEHA make it to serve as the potential selective Cu(II) extractant, which also provide a novel insight for the research and development of economical Cu(II) extractants.
研究领域:
化学
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环境科学
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材料科学
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DOI
高影响因子
CARBON
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2023
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IF 10.9
Zhou Yang,Jin Zhang,Changfeng Wang,Hanzhong Cui,Li Yang,Huiyan Zhang,Renguo Guan
Graphene has been recognized as reinforcement and/or protective coating for metal materials due to its unique electronic, mechanical properties and chemical inertness . Challenges of graphene agglomeration and weak graphene/metal interfacial bonding still exist during preparation. Here we report a novel method combining capillary-assisted self-assembly with nascent hydrogen reduction technique to one step coat Al foil with layered-stacking graphene. Al foil constructed slit is filled with graphene oxide (GO) suspensions and the generation of nascent hydrogen occurs at the GO/Al interface. The capillary force drives the GO flakes to layer-by-layer assemble on Al foil, as well as increases the reduction depth of GO. X-ray photoelectron spectroscopy (XPS) reveals that the reduced GO (rGO) binds with Al is not just through van der Waals forces, but with a strong interaction of developing C–O–Al bonds. The hydroxyl groups on GO plays an essential role in the formation of such C–O–Al configuration. Al foil coated with rGO through this capillary-assisted self-assembly with nascent hydrogen reduction method show good corrosion resistance compared to the pristine Al and directly drop-casted GO on Al. The proposed method can be readily applied to the fabrication of graphene/metal composites with improved interfaces.
研究领域:
材料科学
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表面化学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2023
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IF 5.2
Jialiang An,Mingyong Wang,Jintao Zhang,Yongzheng Jia,Baoyan Feng,Lei Dai,Shuqiang Jiao
Vanadium oxycarbide (i.e. VC x O 1-x ) solid solution was expected to be a novel and promising ceramic materials in energy storage, catalysis and the preparation of metallic vanadium. The controllable synthesis and structure analysis of VC x O 1-x solid solution are still rare. Here, VC x O 1-x solid solution with different C/O molar ratio are successfully synthesized through a convenient carbothermal reduction of V 2 O 3 . The influences of reaction temperature, time, and C/V 2 O 3 molar ratio in raw material are studied. It is found that carbothermal reduction must be carried out at higher temperature than 1500 °C in order to prepare single-phase VC x O 1-x solid solution. C/O molar ratio in VC x O 1-x solid solution can be well controlled by C/V 2 O 3 molar ratio in raw material. Based on structure examination, it is confirmed that VC x O 1-x is a continuous solid solution. Compared to VC, VC x O 1-x solid solution exhibits better thermal stability and oxidation resistance . The lattice constant of VC x O 1-x solid solution will increase with the increase of C content due to larger radius of C atom. Electronic properties of VC x O 1-x solid solution were evaluated by first-principles calculations and experiments. The results demonstrated that VC x O 1-x solid solution possesses high conductivity. The work is beneficial to controllable synthesis of VC x O 1-x solid solution and promising applications in energy storage, catalysis and the preparation of metallic vanadium.
研究领域:
材料科学
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陶瓷
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能源存储
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催化
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冶金
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DOI
高影响因子
Chem Catalysis
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2023
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IF 9.4
Xiuzheng Zhuang,Jianguo Liu,Yangqi Ji,Xiaojun Wu,Xinghua Zhang,Lungang Chen,Qi Zhang,Longlong Ma
Summary Pharmaceutical synthesis keeps close ties with the development of heterogeneous catalysts ; in this work, we report a facile way to prepare cobalt nanoparticles encapsulated by a graphene-shelled matrix, whose catalytic activity for a wide range of primary amines is proved to be broadly effective. As determined by its structural features, such a graphene-shelled matrix is characterized by surface defects such that inner metallic atoms are individually pulled outside by the divacancy sites; as a result, the delivery of metallic sites facilitates the easy substitution of the –NH 2 moiety toward functionalized and structurally diverse molecules by directly activating the C=O or C–N bonds in varied substrates, providing cost-effective access to numerous amines and other precursors for more complex drug products. In addition, the performance of this catalyst in a continuous test can reach at least 180 h without any loss of efficiency, which can be mainly ascribed to the protection of graphene-shelled structures.
研究领域:
药物化学
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催化
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材料科学
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DOI
高影响因子
Surfaces and Interfaces
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2026
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IF 6
Aidi Xie,Wusong Geng,Chun Chen,Yunxia Zhang,Haimin Zhang,Guozhong Wang
A mesoporous SiO 2 -supported Ag catalyst co-modified with B 2 O 3 and amino groups (B/Ag@NH 2 −MS) was synthesized through the grafting of amino group onto silica and subsequent impregnation with 10 wt.% Ag and 5 wt.% B 2 O 3 . Density functional theory (DFT) calculations and Bader charge analysis showed that boron (B) doping triggered extensive electronic changes in the modified support. It implied that B atoms gained a partial positive charge, showing Lewis acidic nature, while nearby Ag atoms had a partial negative charge. This electronic redistribution led to a downward movement of the Ag d -band center and a decrease in the work function, which in turn modulated the binding energies of adsorbates and reduced the desorption barrier of MG. Such dual-site cooperation strengthened the adsorption and polarization of the DMO carbonyl group at the adjacent Ag and B sites, thus promoting the activation of the C = O bond. Moreover, the anti-sintering capacity of Ag nanoparticles could be ascribed to their efficient stabilization mechanism, resulting from the synergistic action of oxygen-bridged B/O/Ag species and –NH 2 functional groups.Consequently, it is noted that the catalyst is able to maintain a conversion of about 99% DMO and a selectivity of about 94% MG, and it was able to maintain a conversion rate of over 96% for >350 h. These observations highlight a dual-site electron synergy strategy for developing very active and long-lasting Ag catalysts for ester hydrogenation.
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DOI
高影响因子
iScience
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2023
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IF 5.8
Chengcheng Suo,Wei Li,Sha Luo,Chunhui Ma,Shouxin Liu
Summary Photocatalytic depolymerization is a high value-added approach for utilization of lignin. In this study, magnetic microspheres of FeCoRu@SiO 2 –TiO 2 were synthesized by a co-precipitation method. Doping with CoO x and RuO x was used to improve the response to visible light, and doping with TiO 2 was used to improve the response to ultraviolet light ( λ < 380 nm). The lignin model compound depolymerization rate was >90%. The electron paramagnetic resonance results showed that the reaction occurred in two steps (aerobic phase and oxygen-free phase). Most of the O 2 − was produced in the first step by cleavage of C-O bonds. The second step was inhibited in an oxygen-free atmosphere. This research provides a valid method for enhancing the photocatalytic properties using full-spectrum light and exploring the lignin photocatalytic depolymerization mechanism. Further research is required to develop the catalyst properties and performance to produce radicals.
研究领域:
化学
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材料科学
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环境科学
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催化
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2023
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IF 6.7
Yuqi Zhang,Jiasi Yan,Rixin You,Meng He,Ligen Wang,Minghui Liang
The catalytic epichlorohydrin (ECH) hydrogenation to chloro-propanol is of great industrial importance due to the extensive application of chloro-propanol as an intermediate for pharmaceutics, fine chemicals, and polymers. The challenge of this catalytic reaction lies in that dechlorination can hardly be inhibited in the selective hydrogenation of the epoxy group because the bond energy of the C-Cl bond is very close to that of the C O bond. Herein, we demonstrated that the selectivity of chloro-propanol could be improved from 82.2 % to 94.6 % by incorporating a small amount of Cu single atoms into Pt/C catalysts to inhibit dechlorination. More interestingly, the ring-opening site of the epoxy group can be also engineered by the incorporation of Cu single atoms, as evidenced by the significant increase in the selectivity of 3-chloro-1-propanol from 0.2 % to 14.5 %. Comprehensive characterizations and density functional theory (DFT) calculations were carried out to understand the interplay of Cu single atoms and Pt nanoparticles as well as its effect on the catalytic performance. The insights gained in this study will benefit the development of catalysts, especially the bimetallic catalysts for the selective hydrogenation of halogeno-aliphatic compounds.
研究领域:
催化
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化学工程
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材料科学
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理论化学
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DOI
高影响因子
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