ACS Sustainable Chemistry & Engineering
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2017
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IF 5.951
Qiying Liu,Tao Zhang,Yuhe Liao,Chiliu Cai,Jin Tan,Tiejun Wang,Songbai Qiu,Minghong He,Longlong Ma
Producing chemicals from lignocellulosic biomass is important in view of the huge availability of biomass and positive environmental significance by reducing carbon emission due to fast carbon cycle during biomass growth and applications. Here, we prepared zirconium based solid acids for hydrolytic hydrogenation of raw lignocelluloses to coproduce C5/C6 sugar alcohols (the important platform for downstream chemicals and fuel production) as combined with commercial Ru/C. Among these solid acids, the amorphous zirconium phosphate (ZrP) presented the largest acidic sites, with medium and strong acidity as the majority, showing the highest goal sugar alcohols yield of 70% at optimal reaction conditions. During pennisetum transformation, this combined catalyst was reusable despite the activity of the second run being lower than the initial one, and the activity could be recovered by recalcination of spent ZrP. The primary structure of surviving lignin remained after cellulose and hemicellulose were converted, showing the significance for fractional biomass applications if considering the further transformation of lignin.
研究领域:
催化化学
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生物质能源
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绿色化学
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可再生化学品
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多相催化
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DOI
高影响因子
Environmental Progress & Sustainable Energy
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2026
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IF 2.3
Yan Hao,Jiayuan Yue,Qianxing Lu,Ke Chen,Xinran Qian,Xiudan Hou,Shushu Ding,JieJia Li,Qing Zhu,Huixiao Duo
The existence of highly effective antibacterial agents such as triclosan (TCS) in terrestrial environments and even the human body results in increasing ecological and public health risk due to their potential toxicity. Here, a series of magnetic porous carbon spheres derived from Zr/Fe-based bimetallic organic framework, denoted as Zr/Fe-MOF@C, were developed for the efficient removal of triclosan (TCS) from water. The Zr/Fe-MOF@C demonstrated enhanced adsorption performance for TCS with a maximum adsorption capacity of 769.23 mg/g in 30 s. This value is ~10 times higher than that of many previously reported materials, demonstrating a significant advancement. The adsorption isotherms and kinetics of TCS on Zr/Fe-MOF@C were best described by the Langmuir and pseudo-second-order models, respectively. The thermodynamic analysis confirmed that the TCS removal process was favorable, spontaneous, and exothermic. Notably, Zr/Fe-MOF exhibited exceptional regenerative stability, retaining adsorption capacity of 308–410 mg/g over four consecutive adsorption–desorption cycles. The removal mechanism of TCS by Zr/Fe-MOF@C is primarily attributed to the synergistic effects of π-π stacking interaction, hydrophobic interaction, and pore filling effects. Given its rapid adsorption kinetics, excellent removal capacity, and convenient recyclability via external magnets, Zr/Fe-MOF@C emerges as a promising adsorbent for TCS removal from surface water, highlighting its strong potential for practical applications in real-water treatment.
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FUEL
·
2026
·
IF 7.5
Muhammad Kashif Majeed,Rashid Iqbal,M.Umar Majeed,Muhammad Akram,M.Zeeshan Ashfaq,Adil Saleem
Heterogeneous catalysis is highly desirable for the self-condensation of cyclohexanone, an important step in producing intermediates for fine chemicals and polymers. Conventional methods often rely on toxic reagents and long reaction times, limiting their industrial viability. In this study, Zr- and Hf-based metal–organic frameworks (UiO-66 and NUS-6) were developed as efficient, environmentally friendly catalysts for the self-condensation of cyclohexanone. Their high surface area and hierarchical porosity, combined with bifunctional Brønsted and Lewis acid sites introduced through partial linker substitution, enable excellent catalytic performance. UiO-66(Zr) achieved 81 % conversion in 6 h and 98 % in 48 h, while NUS-6(Zr) reached 85 % and 86 % under the same conditions, with high selectivity toward the desired dimer products. The catalysts also showed strong thermal stability and reusability, maintaining activity at elevated temperatures. This work demonstrates a sustainable catalytic pathway for cyclohexanone dimerization, avoiding corrosive chemicals while offering both efficiency and selectivity.
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高影响因子
ACTA MATERIALIA
·
2026
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IF 9.3
Sai Liu,Xiaopeng Hu,Guangsheng Chen,Shenxiang Luo,Yu Zou,Jinwei Guo,Wang Zhu
Despite their promise as candidates for thermal barrier coatings (TBCs), the engineering application of A 6 B 2 O 17 ( A = Hf, Zr; B = Ta, Nb) ceramics is currently limited by a lack of comprehensive understanding regarding their CMAS corrosion behavior and underlying mechanisms. This paper addresses this gap by elucidating the governing effects of compositional modulation and corrosion conditions on the CMAS corrosion performance of these ceramics, integrating experimental and first-principles theoretical approaches. The results demonstrate that while all compositions exhibit similar corrosion products and resistance mechanisms, A 6 Ta 2 O 17 (particularly Hf 6 Ta 2 O 17 ) displays superior corrosion resistance. This enhanced performance is attributed to a combination of factors, including its exceptional thermodynamic stability, reduced Ca 2+ diffusivity, the significant barrier effect of its dense corrosion product layer, and stronger interfacial bonding strength. Corrosion-induced spallation in Zr 6 B 2 O 17 primarily stems from two factors: the phase transformation of ZrO 2 and an inherently weak interfacial bonding strength. Moreover, while an elevated Ca/Si ratio increases the aggressiveness of CMAS melts, the formation of a dense corrosion product layer on the ceramic surface effectively mitigates this detrimental effect.
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Journal of Nanomaterials
·
2018
·Vol. 2018
·期 1
·1634814
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IF 2.207
Lianbing Zhong,Guihong Geng,Yujin Wang,Feng Ye,Limeng Liu
A fully dense TaC ceramic was prepared by hot pressing using 10 mol% ZrC plus 5 mol% Cu as a sintering aid. Formation of (Ta, Zr)C solid solution (ss) by reaction between TaC and ZrC facilitated densification. Addition of Cu refined the microstructure and consequently improved flexural strength of the TaC ceramics. TEM investigation found ubiquitous precipitation of nanocrystallites at multigrain conjunctions. The nanocrystallites were (Ta, Zr)C solid solution with uniform dispersion in an oxygen-rich glassy matrix. Although formation of nanoprecipitates may not much affect the mechanical properties of the TaC ceramic, the structure suggested a new type of nanoceramic worth further research.
研究领域:
材料科学
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陶瓷学
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固态化学
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显微结构分析
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复合材料
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2023
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IF 5.2
Xianyi Gan,Xiang Li,Bo Wang
Metal-organic frameworks (MOFs) are effective photocatalysts with high surface area and excellent visible light absorption. In this study, a kind of Zr-porphyrin (PCN-134) and its derivatives PCN-134(Fe) and PCN-134 (Cu) were prepared for removing six structurally diverse micropollutants with extremely low concentrations (100 μg/L). The initial adsorption rates for five selected pharmaceuticals (antipyrine (AT), sulfadimethoxypyrimidine (SSM), clofibric acid (CA), diclofenac (DF), and ibuprofen (IBU)) ranged from 174.5 μg/(g • min) to 2256.5 μg/(g • min) over PCN-134 (Cu), which is 1.2–2.5 times higher than those of PCN-134. A series of optical and photoelectric properties were studied using Mott−Schottky plots, UV–Vis diffuse reflectance spectrum (UV-DRS), and transient photocurrent intensity analysis. PCN-134 (Fe) successfully extended the visible-light absorption edges at around 750 nm. PCN-134 and PCN-134 (Fe) were favorable for generating •O 2 − with E CB values calculated at −1.04 eV and - 0.55 eV by Mott−Schottky plots and UV–Vis diffuse reflectance spectrum (UV-DRS). The incorporation of metals enhanced the charge separation properties of PCN-134. The transient photocurrent intensity of PCN-134 (Fe) was 3.1 times higher than that of PCN-134 (Cu). The degradation efficiency for naproxen (NPX) over PCN-134 (Fe) for antipyrine (AT) and clofibric acid (CA) was 2.4 times and 11.3 times higher than those over the pristine PCN-134. •O 2 − and 1 O 2 could be the major ROS produced, confirmed by quenching experiments and electron paramagnetic resonance (EPR) technologies. This study offers useful guidance to improve the current materials for water purification .
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Shiwei Song,Yanhui Wang,Xueqing Tian,Fanjia Sun,Yungang Yuan,Wei Li,Jianbing Zang
The synthesis of efficient and economical electrocatalysts for oxygen evolution reactions (OER) by the energy-saving approach has far-reaching significance for the production of hydrogen by water electrolysis. Herein, a facile route was proposed to prepare Zr-doped Ni/Fe (oxy)hydroxide layer grown on Ni-Fe foam (Zr-NiFe(OH) x /NFF) by chloride ions in-situ corrosion strategy in “NaCl-ZrOCl 2 ” mixed solution. The smooth NFF surface was effectively transformed into a rough multimetallic (oxy)hydroxide nanosheet with high electrochemical specific surface area and strong bonding to the substrate, resulting in excellent interface performance for mass transfer and charge transfer. Specifically, the incorporation of Zr 4+ regulated the electronic environment around the Ni/Fe center, as a result, adsorption energies were optimized and the inherent OER activity of active sites was enhanced. The Zr-NiFe(OH) x /NFF self-supporting electrode exhibited outstanding OER electrocatalytic activity where low overpotentials of 211 and 245 mV were obtained to achieve 10 and 100 mA cm −2 respectively, along with impressive durability for 40 h. This work provides a simple strategy for low-cost and mass production of the robust OER self-supporting electrocatalysts.
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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2022
·Vol. 332
·期 7
·2473-2485
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IF 1.754
Wang Junlian,Liu Hui,Zhao Hongru,Wang Huajun
A new Zr/Hf separation system was developed with a novel unsymmetrical dialkylphosphinic acid extractant ( n -octyl)(2,4,4'-trimethylpentyl)phosphinic acid (INET-1). It selectively extracts Hf over Zr, and shows much better Zr/Hf separation efficiency than organophosphorous acid Cyanex 272. The Zr and Hf extraction reactions at acidities of < 2 mol/L H 2 SO 4 and > 5.5 mol/L H 2 SO 4 are revealed, respectively. An organic phase with 10 mmol/L INET-1 can load > 290 mg/L of Hf at 1 mol/L H 2 SO 4 . Acidic H 2 SO 4 solutions with concentration of 3.0–4.5 mol/L is a good Zr scrubbing agent.
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高影响因子
Molecular Catalysis
·
2022
·
IF 5.089
Yiqiang Liu,Yimei Qiu,Wenlong Jia,Zhiliang Shen,Zheng Li,Jiaren Zhang,Yong Sun,Xing Tang,Xianhai Zeng,Lu Lin
In this work, a porous Zirconium based coordination polymer (Zr-ATMP) was facilely synthesized at room temperature with amino tris(methylene phosphonic acid) (ATMP) as ligand, and the surface acidic sites could be adjusted in different solvents. Specifically, the coordination polymer with equivalent content of Bronsted and Lewis acid sites was synthesized in aqueous system, showing high-efficiency catalytic activity for fructose dehydration to 5-hydroxymethylfurfural (HMF). In comparison, the coordination polymer containing an abundance of Lewis acid sites was synthesized in DMF solvent, which efficiently catalyzed the transfer hydrogenation of HMF. Compared to the catalysts preparation in organic solvents, the coordinatively unsaturated Zr 4+ could be hydrated in water during catalyst preparation, resulting in the generation of additional Bronsted acid sites at the cost of Lewis acid sites. This contribution proposed a facile approach to prepare Zr-based coordination polymer with tunable acid properties for biomass valorization.
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Crystals
·
2023
·Vol. 14
·期 1
·14
·
IF 2.7
Yufei Zu,Zi Wang,Hongliang Tian,Fan Wu,Lianshen Fu,Jixiang Dai,Jianjun Sha
High-entropy diboride-based (MeB2-based) ceramics are promising high-temperature structural materials because of their excellent mechanical properties, high-temperature stability, and oxidation resistance. In order to achieve low-temperature sintering of the high-entropy ceramics, a novel preparation method of high-entropy (Ti,Zr,Nb,Mo,W)B2-SiC ceramics based on reactive sintering of pre-alloyed solid-solution metals and nonmetals of Si, C, B4C was conducted in the current work. Mechanical alloying behavior of the mixed metal powders, as well as the phase composition, microstructure, mechanical properties, and oxidation behavior of the as-sintered MeB2-SiC ceramic were investigated. The XRD, SEM, and EPMA results indicated that the primary MeB2solid-solution and SiC phases could be successfully formed during reactive sintering at a relatively low temperature of 1650 °C. The as-sintered MeB2-SiC ceramics had a high relative density of 97.8% and high mechanical properties (hardness of 19.74 ± 0.8 GPa, flexure strength of 533 ± 38 MPa, and fracture toughness of 6.01 ± 0.77 MPa·m1/2). Combining the oxidation behavior and microstructure evolution of the oxidation layer, a continuous and relatively dense MeOx-SiO2oxidation layer was gradually formed and covered on the external surface, leading to decelerating oxidation behavior after an oxidation exposure time of 10 min.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Mingbo Shi,Daiwu Lin,Renliang Huang,Wei Qi,Rongxin Su,Zhimin He
The treatment of multicontaminant wastewater has attracted extensive attention in recent years. Herein, we synthesized a porous and hydrophobic composite (Zr-MOF-SH/MF) via the in situ growth of mercapto-functionalized Zr-metal–organic frameworks (MOFs) (Zr-MOF-SH) on the surface of a melamine formaldehyde (MF) sponge. The successful growth of hydrophobic Zr-MOF-SH, as confirmed by SEM, XRD, and XPS analysis, made the MF sponge become hydrophobic with a water contact angle of 125°. The adsorption capacity of the Zr-MOF-SH/MF composite for dichloromethane can reach up to 113 g/g. Moreover, the composite can efficiently and selectively remove Hg2+ ions from water. Especially, PCN-224-MAA/MF had an adsorption capacity of 412.5 mg/g for Hg2+ ions. The removal efficiency of Hg2+ ions increased as the oil content in the oil–water mixture increased. In addition, PCN-224-MAA/MF can be recovered and reused five times with only a slight decrease in adsorption capacity. This study provides a promising strategy for the synthesis of a dual-functional composite that exhibits excellent performance in removing oil and heavy metal ions simultaneously from water.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2021
·
IF 5.302
Yongchang Guo,Ying Zhang,Mathieu Allix,Shaowei Feng,Hong Sun,Cécile Genevois,Emmanuel Véron,Jianqiang Li
Pyrochlore-based glass-ceramics are attracting attention as a promising host material for immobilizing minor actinide in high-level wastes. However, the loading capacity of pyrochlore-based materials for actinide elements is to be improved, and only conventional synthetic approaches of powder sintering and glassy bulk crystallization were reported. Here, new (La,Y) 2 (Zr,Ti) 2 O 7 pyrochlore-based glass-ceramics were subtly designed and successfully prepared through a rapid melting and solidification process. The solidification behavior of samples with different cooling rates was investigated, the dense and crack-free (La,Y) 2 (Zr,Ti) 2 O 7 pyrochlore-based glass-ceramics were prepared at the cooling rate of 500 °C/s (within 1.5 s). The present amorphous La 2 O 3 -TiO 2 -Al 2 O 3 phase demonstrates the outstanding thermal stability compared with the currently used borosilicate glass for high-level waste immobilization due to the lack of conventional glass-forming components. The results show the great feasibility of this novel synthesis route for glass-ceramics by direct solidification and its good potential for immobilizing high-level wastes.
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危险品化学品经营许可证（带存储）