Journal of Energy Chemistry
·
2021
·
IF 9.676
Ziyi Li,Haigang Hao,Jingjing Lu,Chengming Wu,Rui Gao,Jifan Li,Chun-Ling Liu,Wen-Sheng Dong
Here we exquisitely fabricated Cu/ZrO 2 -dp catalysts with plentiful Cu-ZrO 2 interfaces by depositing amorphous ZrO 2 onto Cu nanoparticles for the hydrogenation of levulinic acid (LA) to γ-valerolactone (GVL). With the created plentiful Cu-ZrO 2 interfaces, the optimal catalyst 3Cu/ZrO 2 -dp exhibited exceptional catalytic performance under mild reaction conditions, and achieved the highest GVL mass productivity of 266.0 mmol GVL·h −1 ·g −1 Cu, which was 12.5 and 2.3 times of Cu/ZrO 2 catalysts with equivalent Cu loadings prepared by traditional impregnation (3Cu/ZrO 2 -im) or co-precipitation (3Cu/ZrO 2 -cp). As far as we know, this GVL mass productivity stood at the highest level compared with those obtained using non-noble metal catalysts under similar reaction conditions. By systematic investigation with multiple characterizations, density functional theory (DFT) calculations, and kinetic studies, it was found that interfacial active centers were created at Cu-ZrO 2 interfaces, which contained oxygen vacancies (O v ), negatively charged Cu δ− and partially reduced Zr 3+ . The O v favored the adsorption and activation of LA via its ketone group, while negatively charged Cu δ− was able to enhance heterolysis of H 2 , which resulted in the formation of H + -Cu δ− and Zr 3+ -H − active species via hydrogen spillover. Also, plentiful acid sites, which derived from coordinatively unsaturated and defective Zr species, generated at Cu-ZrO 2 interfaces. With the cooperation of interfacial active centers (Cu δ− -O v -Zr 3+ ) and acid sites, the fabricated 3Cu/ZrO 2 -dp with plentiful Cu-ZrO 2 interfaces achieved excellent catalytic performance for the hydrogenation of LA to GVL. Hence, the synergistic catalysis of Cu-ZrO 2 interfaces provided an effective strategy for designing catalysts with a satisfactory performance for the hydrogenation of LA, which also can be expanded to other hydrodeoxygenation reactions.
研究领域:
催化
·
化学工程
·
材料科学
·
物理化学
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DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Zhongdi Liu,Rui Zhang,Huai Liu,Junhua Zhang,Yong Sun,Naya Li,Lincai Peng
Developing efficient and stable solid functional materials for the catalytic upgrading of biomass-based platform furanic molecules is of great significance to produce value-added chemicals and biofuels. We herein report β-zeolite (β)/biobased carbon hybrids supported Zr species towards the cascade conversion of furfural into γ-valerolactone (GVL) with high activity and favorable stability. The role and importance of carbon modifier were highlighted. The cellulose (CEL) modified Zr/β-CEL catalyst was found to be uniquely effective, leading to an increase of GVL yield from 49.3% to 81.1%. Catalyst characterizations revealed that the structural integrity of β was largely preserved using CEL as the carbon modifier, accompanied by the increased mesopore volume and pore size for better accessibility of active sites and diffusion of reactants. Simultaneously, the presence of CEL offered an appropriate ratio of Lewis and Brønsted acid sites due to the well incorporation and dispersion of Zr species, which ensured the successive transfer hydrogenation and ring-opening reactions. Kinetic studies demonstrated the positive effect of CEL modification on reducing the apparent activation energy and thereby facilitating the GVL formation. More importantly, Zr/β-CEL with enhanced structural stability also exhibited markedly higher recyclability compared with the pristine Zr/β. The understanding on the roles of carbon modifier can be employed to optimize the physicochemical properties of zeolite-based catalysts for roundly improving the catalytic reactivity of biomass-related compounds.
研究领域:
催化化学
·
材料科学
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DOI
高影响因子
INORGANICA CHIMICA ACTA
·
2022
·
IF 3.118
Yu-Teng Zhang,Juan Zhu,Zhao-Yang Liu,Shuang-Bao Li,He Huang,Bao-Xu Jiang
For the first time, a microwave-assisted synthesis approach was used to prepare an amino-functionalized Zr-based metal–organic polyhedron (denoted as MW-ZrT-1-NH 2 ). The reaction time was shortened from 12 h to 2 min when compared to the traditional solvothermal method, resulting in crystalline products with good yield and purity. Herein, MW-ZrT-1-NH 2 was utilized as a photocatalyst for the catalytic reduction of Cr(VI) under visible-light irradiation. The results revealed that MW-ZrT-1-NH 2 exhibits better photocatalytic performance for Cr(VI) reduction. Furthermore, a plausible photocatalytic mechanism was proposed via electron spin resonance (ESR) measurements and radical trapping tests.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 26
·21101-21110
·
IF 2.779
Wang Zhaohui,Fang Weishuang,Tang Ying,Xiang Huaicheng,Li Jie,Fang Liang
Ca 3 MZnGe 3 O 12 ( M = Zr, Sn) ceramics crystallized in a cubic garnet structure (A 3 B 2 C 3 O 12 ) with a space group of Ia- 3 d , and promising microwave dielectric properties with low coefficients of thermal expansion ( α L ) were obtained, namely, ε r = 10.5 and 9.3, Q × f = 79,700, and 96,040 GHz, τ f = − 36.1 and − 61.5 ppm/°C, and α L = 4.3 and 4.7 ppm/°C for Ca 3 ZrZnGe 3 O 12 and Ca 3 SnZnGe 3 O 12 , respectively. Bond valence calculation reveals that Ca 3 SnZnGe 3 O 12 exhibits a slight “compressed” effect at A-site and B-site with a slightly negative deviation (Δ ε r ~ − 1.01%) of the porosity corrected ε r (corr) from theoretical ε r (C–M) calculated by the C–M equation, while Ca 3 ZrZnGe 3 O 12 shows a “rattling” effect at the A-site and C-site with a large positive Δ ε r ~ 15.8%, leading to a high ε r , a more close to zero τ f and a lower Q × f value as compared to those of Ca 3 SnZnGe 3 O 12 . The relationship between structure and their intrinsic microwave dielectric properties was investigated by complex chemical bond theory and far-infrared reflectivity spectra.
研究领域:
材料科学
·
物理学
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DOI
高影响因子
MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 2
·125
·
IF 5.4
Ye Jiaqing,Shen Hao,Wu Jiacai,Feng Bin,Yu Shaoning
We constructed a novel fluorescent aptasensor based on Zr-MOF@MB composite material for rapid and highly sensitive detection of probiotics Bacillus subtilis and Lactobacillus acidophilus in shrimp aquaculture. The sensor utilizes a zirconium-based metal–organic framework to load the signal molecule methylene blue (MB) and immobilizes specific aptamers via Zr–O–P bonds to form a gating structure. In the presence of the target bacteria, a conformational change in the aptamer triggers the release of MB, leading to a decrease in fluorescence intensity, thereby enabling quantitative determination of the bacteria. The method completes detection within 30 min, with a linear range of 10¹ to 10⁷ CFU/mL and detection limit of 7 CFU/mL for B. subtilis and 10 CFU/mL for L. acidophilus . The developed sensor is simple to operate and highly sensitive, providing a reliable tool for effective monitoring of probiotics in shrimp aquaculture and offering new insights for the development of aptamer-based sensors for microbial detection in complex matrices.
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产品关联
DOI
PubMed
高影响因子
Acta Metallurgica Sinica-English Letters
·
2021
·Vol. 35
·期 3
·411-424
·
IF 2.755
Xu Rong,Li Ruidi,Yuan Tiechui,Zhu Hongbin,Li Ping
In order to refine the microstructure and improve the performance of direct energy deposited (DED) additively manufactured Al–Mg–Sc–Zr alloy, TiC-modified Al–Mg–Sc–Zr composites were prepared by DED and the effect of TiC content on the microstructure and performance was studied. In the absence of TiC particle, the microstructure of Al–Mg–Sc–Zr alloy prepared by DED consisted of fine grains with average size of 8.36 μm, and well-dispersed nano-Al 3 (Sc,Zr) particles inside the grains and Mg 2 Si phase along the grain boundaries. With the addition of 1 wt% TiC, the microstructure of TiC/Al–Mg–Sc–Zr prepared by DED became finer apparently compared with that without TiC; while the further increase of TiC content to 3 wt%, the microstructure of TiC/Al–Mg–Sc–Zr prepared by DED became coarser with appearance of a new kind of needle-like (Ti,Zr) 5 Si 3 phase. Also, the addition of TiC decreased the porosity of Al–Mg–Sc–Zr prepared by DED. Simultaneously, after the addition of TiC, the tensile strength increased from 283.25 MPa to 344.98–361.51 MPa, and the elongation increased from 3.61% to 9.58–14.10%. The potential mechanism of the microstructure evolution and strength improvement was discussed. This research will provide new insights into the available metal matrix composites by laser additive manufacturing (LAM).
研究领域:
材料科学
·
增材制造
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 7.7
Yinhui Yi,Jing Li,Chenxu Wang,Guanghua Mao,Gangbing Zhu
Noble metal-based oxidase-like (MOD) nanozymes show great applications referring to the common peroxidase-like (POD) nanozymes, while their insufficient activity and stability need to be addressed urgently. Herein, by introducing defective porphyrin Zr metal–organic framework (PCN-224) cube as metal carrier and in-situ growth method, a novel MOD nanozyme of defective PCN-224 decorated with platinum nanoparticles (PCN-224@Pt NPs) was prepared and characterized firstly, which possesses extremely high loading amount of Pt (72.82 wt%) and prominent catalytical activity (K m , 0.18 mM; V max , 10 −8 M s −1 ). In addition, based on the specifical bonding of PCN-224 towards antibiotic tetracycline (TC), we revealed that TC could inhibit the catalytical activity of PCN-224@Pt NPs nanozyme, and then a sensitive colorimetric sensing platform was thus designed to detect TC, which could effectively avoid the utilization of H₂O₂ coupled with superior analytical performances compared to the reported POD nanozyme-based sensing platforms. Meanwhile, by integrating this nanozyme to medical cotton swab and coupling with the help of smartphone, simple, low-cost and onsite analysis for TC could be achieved successfully. This work not only proposed an innovative way via defect engineering to design MOD nanozymes with excellent catalytical activity, but also developed a highly effective colorimetric and smartphone dual-mode sensing method for TC, thus showing great potential applications.
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DOI
高影响因子
CATALYSIS TODAY
·
2026
·
IF 5.1
Yitong Zhao,Meng Liu,Yingshuo Guo,Zhuoya Wang,Zhennan Yang,Zhijie Wu
Hierarchical Zr-Beta zeolite is realized by the alkali treatment. • Alkali treatment facilitates the conversion of closed Zr sites to open Zr sites. • The open Zr sites are characteristic of Lewis acidity. • Hierarchical Zr-Beta zeolite possess high activity and selectivity in furfural hydrogenation. The catalytic hydrogenation of furfural (FF) into furfuryl alcohol (FAL) is one of the key reactions in the valorization of biomass-derived platform compounds into value-added chemicals and fuels. The present study demonstrates that hierarchically modifying Zr-Beta zeolite (h-Zr-Beta zeolite) via alkali treatment can promote the activity and selectivity in the catalytic transfer hydrogenation (CTH) of FF to FAL, with the FAL formation rate of 8.8 mmol FAL g −1 h −1 . Comprehensive experimental and characterization studies reveal that alkali treatment, not only increases mesoporous within Zr-Beta zeolite, promoting the accessibility of internal active sites within the zeolite, but also increases the proportion of open Zr sites (11.6–54.5%). The consequently enhanced Lewis acidity (4.2 mmol g −1 to 8.8 mmol g −1 ) promotes the selective hydrogenation of FF to FAL. This work provides an efficient strategy for the fabrication of open sites within heteroatom zeolites, which could be of great help for the design of Lewis acid zeolite for Meerwein-Ponndorf-Verley (MPV) reactions in biomass catalysis. Download: Download high-res image (176KB) Download: Download full-size image We constructed a hierarchically porous Zr-Beta zeolite for the transfer hydrogenation of furfural into furfuryl alcohol via modification of Zr-Beta zeolite to generate open Zr active sites using alkali treatment
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DOI
高影响因子
INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Fangfang Chen,Xiudu Zhang,Wensen Du,Chengcheng Ye,Meng Liu,Jun Du,Yonghong Ni
2,4-Dinitrophenol (2,4-DNP) and p-nitroaniline (PNA), as hazardous nitroaromatic explosives and persistent organic pollutants, exhibit high toxicity, nonbiodegradability, and carcinogenicity. Exposure to these compounds can cause severe health issues, including cardiovascular, neurological, and renal damage. In this study, a novel zirconium-based metal–organic framework (Zr-MOF, denoted as Zr-BPBI) was synthesized via a solvothermal reaction using the ligand 4,4′,4″,4‴-([1,1′-biphenyl]-4,4′-diyldi(1H-imidazole-2,4,5-triyl))tetrabenzoic acid (H4BPBI) and ZrCl4. The investigations showed that the original synthetic parameters, including surfactant concentration, acid type, reaction time, and temperature, could strongly affect the morphology, particle size, and fluorescence performance of the as-prepared Zr-BPBI. Interestingly, under excitation at 422 nm, the as-prepared Zr-BPBI nanoparticles (Zr-BPBI-NP) emitted blue luminescence centered at 502 nm, which demonstrated exceptional sensitivity toward PNA and 2,4-DNP with rapid fluorescence quenching responses (within 30 s for 2,4-DNP and 15 s for PNA). Simultaneously, common interfering substances (e.g., small molecules and ions) did not affect the above detection, suggesting high selectivity of the as-prepared Zr-BPBI-NP fluorescent probe. The corresponding limits of detection were 0.36 μM for 2,4-DNP and 0.4 μM for PNA. Obviously, the present Zr-BPBI-NP fluorescent probe is a new option for the highly sensitive and selective detection of PNA and 2,4-DNP in actual aqueous environments.
✓ 已验证
DOI
PubMed
高影响因子
CATALYSIS TODAY
·
2026
·
IF 5.1
Wei Yi,Wenqiang Zhao,Wushan Sun,Yuansheng Bai,Qingyin Wang,Gongying Wang
Direct synthesis of dimethyl carbonate (DMC) from CO 2 is a sustainable carbon utilization route but suffers from thermodynamic limitations and rapid catalyst deactivation. Herein, we report a scalable MOF-derived strategy to construct porous Zr x Ce 1-x O 2-δ solid solution catalysts with tunable oxygen vacancies (O v ) by precisely controlling calcination conditions. Although calcination at 700 °C decreased the specific surface area, it optimized Ce 3+ /(Ce 4+ +Zr 4+ ) synergy and O v density, thereby enhancing CO 2 activation and surface acid–base properties. Thermodynamic analysis underscores the critical role of dehydrating agents in overcoming equilibrium constraints. Furthermore, DFT calculations reveal that O v lowers the rate-limiting *CH 3 OCOO dissociation barrier by 0.69 eV, while competitive adsorption between the dehydrating agent (2-cyanopyridine) and its product (pyridine-2-carboxamide) on active sites drives catalyst deactivation. Under optimized conditions (700 °C calcination; 140 °C, 4 MPa), Zr 0.05 Ce 0.95 O 2-δ achieved an exceptional DMC formation rate of 261.99 mmol·g −1 ·h −1 with 97.71% selectivity. This work provides new insights into defect engineering and deactivation mechanisms, establishing a rational design strategy for efficient CO 2 -to-chemical conversion.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Zerong Sun,Yuxin Shi,Lingjun Zhu,Shurong Wang
CO 2 hydrogenation to methanol is a core topic in low-carbon chemistry. Cu-based catalysts are widely used due to their low cost and high activity, while perovskites offer advantages such as tunable CO 2 adsorption and high oxygen mobility. In this study, perovskite-structured catalysts were designed and modified with Ce or Zr dopants for this reaction. The results demonstrated that Ce or Zr doping promoted the formation of oxygen vacancies and moderate basic sites. In particular, the Ce-doped LaCeCuZn-181 catalyst exhibited the optimal performance, achieving a CO 2 conversion of 23.3% and a methanol selectivity of 76.5% at 270 °C, 3 MPa. Moreover, no significant deactivation was observed during a 120-h stability test. Comprehensive structural characterizations confirmed that the enhanced activity originated from the synergistic interaction among Cu 0 /Cu + species, oxygen vacancies, and moderate basic sites, which together facilitates H 2 dissociation, CO 2 activation, and intermediate transformation.
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DOI
高影响因子
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2025
·
IF 3
Zhihui Xu,Jing Li,Xiaoling Peng,Shan Tao,Jingcai Xu,Bo Hong,Xinqing Wang
The present study utilized Y 3 Fe 5 O 12 (YIG) ferrites as a coating on Fe-Si-B-Cu-Zr nanocrystalline magnetic powder to fabricate soft magnetic composites (SMCs). The influence of YIG content and annealing temperature on the magnetic properties of Fe-Si-B-Cu-Zr/YIG SMCs was investigated. It was revealed that an appropriate amount of YIG in the composite could enhance the permeability and its resistance to DC bias, while reducing eddy current loss. The results demonstrated that the Fe-Si-B-Cu-Zr/YIG SMCs coated with 1.0 wt% YIG exhibited good comprehensive magnetic properties, with a permeability of 33.8, 86.1 % retention under a DC bias of 100 Oe, and a 53.1 % reduction in eddy current loss to 13.86 mW/cm 3 at 500 kHz and 10 mT. Besides, the optimal annealing temperature for achieving decrease core loss and maximum permeability was determined to be 500℃ for the Fe-Si-B-Cu-Zr/YIG SMCs. This study demonstrates a promising coating material to enhance the high-frequency magnetic properties of nanocrystalline soft magnetic composite.
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DOI
高影响因子
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