FUEL
·
2019
·
IF 5.128
Shaoqu Xie,Chuhan Fu,Wenli Song,Yulei Zhang,Conghua Yi
Developing a simple and efficient process for the conversion of biomass to petrol, diesel and jet fuels are our urgent mission due to the limitation of fossil fuels. Biobutanol is an important biomass-derived biofuel that can be converted to longer-chain petrol-range, diesel-range and jet-range fuels. Basing on the obtained concentrated acetone-1-butanol-ethanol (ABE) fermentation broth through a prefractionator, we report a palladium-catalysed alkylation of acetone with ethanol and 1-butanol to more efficiently produce C 5 –C 11 fuel precursors in a reactor, where all the precursors and reactants were separated simultaneously by the salting-out effect of K 3 PO 4 . The precursors include ketones and a small amount of alcohols that can be reduced to alkanes for use as liquid transportation fuels. Tuning the reaction conditions can obtain different proportions of C 5 –C 7 products (monoalkylation) and C 9 –C 11 products (double alkylation) and the overall product contents accounted for up to 82 wt%. More than 99.5% of water from the concentrated ABE fermentation broth was removed by the salting-out effect of K 3 PO 4.
研究领域:
生物化学
·
能源科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Lu Zhang,Guijiu Xie,Fuyi Liu,Huiming Ji
Hydrogen sensors are very important for real-time detection of hydrogen leakage. In this study, a Pd-Ni film hydrogen sensor with high hydrogen response and selectivity was fabricated. A 1.3 µm-thick organosilica membrane was coated on the surface of Pd-Ni alloy film by sol-gel process and hot-coating method to fabricate a 1,2-bis(triethoxysilyl)methane (BTESM)-coated Pd-Ni film hydrogen sensor, which endows the sensor with superior H 2 selectivity due to the molecular sieve property. And the gas sensing performance was tested at optimum operating temperature. The results show higher response is obtained in both N 2 and air atmosphere by hybrid organosilica membrane modification on the Pd-Ni film sensor. Very importantly, the response of the sensor to hydrogen is greatly improved and well maintained in the presence of oxygen, although the response/recovery time increased. The organosilica membrane has high permeability to hydrogen with the kinetic dimater of 0.289 nm while effectively inhibits the permeation of relatively larger gas molecule such as oxygen (0.34 nm) and methanol (0.38 nm), resulting in excellent selectivity to H 2 . The mechanism of response and selectivity enhancement is explored.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Ming Lei,Yao Tang,Huimin Wang,Lihua Zhu,Guihua Zhang,Yu Zhou,Heqing Tang
It is still very difficult to achieve rapid cleavage of C-Cl bond of highly-chlorinated benzenes by catalytic reduction process under mild conditions. By using pentachlorobenzene (PentaCB) as a representative of highly-chlorinated benzenes, we proposed a strategy to achieve rapid and complete dechlorination of highly-chlorinated benzenes by exploiting palladium with low content deposited g-C 3 N 4 (Pd/g-C 3 N 4 ) as a catalyst with NaBH 4 as a reductant. Under favorable conditions, this strategy yielded a dechlorination efficiency of 100% for PentaCB (0.4 mmol L −1 ) in methanol solution at 30 °C within 20 min, and especially the consumption of NaBH 4 is as low as 10 mmol L −1 with a molar ratio of Cl atoms to NaBH 4 of only 1:5. A hydro-dechlorination pathway was confirmed to dominate the dechlorination of PentaCB, which involves active hydrogen species (H*) as being identified by electron spin resonance (ESR) monitoring and isotope labelling experiments. The dechlorination rate constant value of chlorobenzenes (CBs) was only a little dependent on the number of chlorine atoms and the chlorine atom with smaller steric hindrance was prior to be substituted by H*. A catalytic mechanism that Pd nanoparticles played an important role on both the weakening/breaking of C-Cl bond and the formation of active hydrogen species was further clarified: Pd exerts affinity interaction on chlorine atoms at ortho -position of CBs molecules to form adsorbed state [CBs] ads ; H* was formed on the Pd surface due to its strong ability in H* retainment; subsequently the generated H* attacks the C-Cl bond in [CBs] ads to achieve hydrodechlorination. The new method provides a highly efficient method to remove halogenated pollutants.
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Hao Li,Fan Wu,Yang Pan,Yuting Zhang,Roser Pleixats,Jianming Pan
With the rapid development of the automobile industry and increasingly strict regulations on automobile exhaust emissions around the world, the production of waste purification catalysts for automobile exhaust will increase, leading to an increasing demand for palladium . Recycling waste three-way catalysts (TWCs) is an important way to obtain palladium resources. However, it is still a challenge to obtain highly selective adsorbents for palladium. Herein, we successfully fabricated two different kinds of Pd 2+ selective composite adsorbents ( PVA@MSNs and PVA@MONs ) through covalent attachment of a proline-valinol amide ( PVA ) as the ligand on silica nanoparticles. The as-prepared adsorbents were characterized by TEM , SEM, elemental analysis , 29 Si and 13 C CP MAS NMR, N 2 -adsorption-desorption isotherm analysis, DLS, zeta-potential, p -XRD and FT-IR, revealing their high loading rate, and the mesoporous structure in the case of PVA@MSNs . In order to evaluate the ability of these two sorbents to selectively capture palladium(II), a series of sequential adsorption experiments were performed. The results showed that 56.35 mg and 67.74 mg of Pd 2+ could be captured per gram by PVA@MSNs and PVA@MONs, respectively. Furthermore, they had a stronger selectivity towards Pd 2+ than other cations (i.e . Co 2+ , Ni 2+ , Zn 2+ , Pb 2+ , Fe 2+ ,) present in the simulated sample. Both sorbents were able to remain stable and show consistent performance in cyclic adsorption-desorption runs. Interestingly, the adsorbents realized for the first time the enrichment and recovery of palladium from organic solvents , offering a potential application in palladium catalyst-loaded industrial waste liquid processes.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
·
IF 3.8
Muhammad Sohail Bashir,Aqsa Safdar,Adnan Ibrahim,Inas A. Ahmed,Syed Shoaib Ahmad Shah,Ahsanullah Unar,Hanadi A. Almukhlifi,Ahmad M. Saeedi,Wang Fuzhou
Developing facile approaches for fabrication of supported metallic nanoparticle (NPs) catalysts, and nascent technologies for their efficient application are highly desired. Herein, one-pot approach is developed for anchoring of palladium (Pd) nanoparticles on porous polyurea (PPU). In this process, tolylene-2,4-diisocyanate was poured to a mixture of water, acetone and palladium acetate at a fixed rate. After that, NaBH 4 was added to the reaction mixture to obtain Pd/PPU with highly porous morphology. The obtained hybrid composite Pd/PPU was characterized by NMR, BET, SEM, XRD, TEM, ICP-OES, and XPS techniques. The outcomes revealed the efficacious anchoring and uniform dispersion of Pd with average size of 7.81 nm onto PPU containing highly porous structure with surface area of 115.51 m 2 /g. A packed-bed reactor was designed by using Pd/PPU for flow-through catalytic reduction of harmful hexavalent chromium (Cr(VI)) to benign trivalent (Cr(III)) with formic acid as reducer from water. A good permeation flux of 20,000 L/m 2 /h with > 99% of Cr(VI) reduction efficiency were obtained. Moreover, it was observed that Pd/PPU was a highly stable (>96% efficiency for 15 h used) catalyst for flow-through transformation of Cr(VI) to Cr(III). This report therefore proposes a facile approach for synthesis of PPU-based Pd, for continuous flow catalytic remediation of wastewaters, an emerging technology.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Zhengyou Zhu,Congcong Liu,Fengxing Jiang,Jing Liu,Xiumei Ma,Peng Liu,Jingkun Xu,Lei Wang,Rui Huang
Rational and smart design of hydrogen (H 2 ) sensors especially those featured with flexibility and light weight is highly desirable, to meet the requirements for future development of portable H 2 sensors. In this work, we demonstrate a novel paper film H 2 sensor employing Ti 3 C 2 T x MXene nanosheets with Pd colloidal nanoclusters (Pd CNC) as the activator. The MXene@ Pd CNC paper film was facilely prepared via an all-colloidal solution-based vacuum-filtration process, which is flexible, light-weight and endowed with a compact, glossy surface. The as-obtained MXene@ Pd CNC film sensor displayed moderate H 2 response at room temperature at either flat or bent states. Specially, the MXene@Pd CNC film sensor delivered a response time of (32 ± 7) s and a sensitivity of S = (23.0 ± 4.0)%@4% H 2 . In addition, the MXene@Pd CNC sensor enabled “in-situ-mode” H 2 detection directly along a piece of paper film with desired size. The strong H 2 adsorption into lattice of ultrafine Pd CNC altered the work function thus induced the electron doping of MXene, which explained the gas sensing mechanism. Therefore, the facilely designed MXene@Pd CNC sensor is believed to contribute to development of future portable and wearable sensing electronics.
研究领域:
材料科学
·
传感器技术
·
纳米科技
✓ 已验证
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 20
·16694-16702
·
IF 3.201
Yongshen Ren,Yanxin Wang,Xun Li,Zehui Zhang,Quan Chi
In this study, we have developed a sustainable method for the hydrogenation of quinolines to 1,2,3,4-tetrahydroquinolines under mild conditions over a nitrogen-doped carbon-supported Pd catalyst with abundant porous structures (abbreviated as Pd/CN). The mesoporous structure of the nitrogen-doped carbon support was prepared by the pyrolysis of glucose and melamine using eutectic salts of KCl and ZnCl2 as the porogen. Due to the high nitrogen content in the support, Pd nanoparticles were homogeneously dispersed on the surface of nitrogen-doped carbon materials with an ultra-small size of 1.9 nm in a narrow size distribution. The as-prepared Pd/CN catalyst showed high catalytic activity towards the hydrogenation of quinolines at 50 °C and 20 bar H2, affording the corresponding 1,2,3,4-tetrahydroquinolines with yields in the range of 86.6–97.8%. More importantly, the Pd/CN catalyst was highly stable without the loss of its catalytic activity during the recycling experiments. The use of renewable resources to prepare the catalyst makes this method promising for the sustainable 1,2,3,4-tetrahydroquinolines from the hydrogenation of quinolines.
研究领域:
催化化学
·
绿色化学
·
材料科学
✓ 已验证
DOI
高影响因子
CATALYSIS LETTERS
·
2012
·Vol. 143
·期 2
·200-205
·
IF 2.242
Zeng Yan,Wang Yanhua,Xu Yicheng,Song Ying,Jiang Jingyang,Jin Zilin
Abstract A thermoregulated ionic liquid and organic biphasic system composed of ionic liquid [CH 3 (OCH 2 CH 2 ) 16 N + Et 3 ][CH 3 SO 3
− ] (IL PEG750 ) with IL PEG750 -stabilized Pd nanoparticles and organic solvents, which allows for not only a highly efficient homogeneous catalytic reaction, but also an easy biphasic separation and reuse of catalyst attributed to the thermoregulated phase-transition property of the system, was employed for Heck reaction. The IL PEG750 -stabilized Pd nanoparticle catalyst exhibited high efficiency, more importantly, after reaction the Pd nanoparticle catalyst could be separated from products by simple phase separation and recycled for six times without evident loss of activity. Graphical Abstract A thermoregulated ionic liquid and organic biphasic system containing [CH 3 (OCH 2 CH 2 ) 16 N + Et 3 ][CH 3 SO
- 3
] (IL PEG750 )-stabilized Pd nanoparticles was applied to Heck reaction for the first time. The Pd nanoparticle catalyst exhibited high efficiency and good recyclability.
研究领域:
化学
·
材料科学
·
催化反应
✓ 已验证
产品关联
DOI
高影响因子
MEASUREMENT
·
2014
·
IF 1.526
Yixin Liu,Wenjuan Zhu,Dan Wu,Qin Wei
Amino-group functionalized mesoporous Fe 3 O 4 nanoparticles were prepared by a simple solvothermal method. Palladium (Pd)-loaded amino-group functionalized mesoporous Fe 3 O 4 nanoparticles (Pd@Fe 3 O 4 ) were prepared with ethanol as the reductant. Pd@Fe 3 O 4 modified the glassy carbon electrode (GCE) exhibited excellent electrochemical catalytic activities towards dopamine (DA) due to the synergetic effect between Pd and Fe 3 O 4 . Electrochemical behavior of Pd@Fe 3 O 4 /GCE towards DA was studied using square wave voltammetry and the selective determination of DA was carried out successfully at high concentration of uric acid. A wide concentration range (0.96–107 μmol/L) and low detection limit (0.41 μmol/L, S/N = 3) for the determination of DA were obtained. The advantageous properties of this electrode for the DA determination lie in its excellent catalytic activity, selectivity and simplicity. The prepared sensor had been applied to the analysis of DA in human serum samples with satisfactory results.
研究领域:
分析化学
·
生物医学工程
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2024
·
IF 4.7
Haitao Zhang,Ningchen Ye,Runzhe Dong,Qing Li,Zheng Wang,Zifei Gao,Xiang Ji,Lin Liu,Juanjuan Ma,Zhiwei Tong
A simple electrochemical reduction technique was employed to generate Ti 3+ with strong reducing property on the anodic TiO 2 nanotubes (ATNTs). Utilizing Ti 3+ as the reducing agent, Pd 2+ was successfully reduced in situ to Pd 0 on the anodic TiO 2 nanotubes (Pd@ATNTs). Various characterization methods were employed to confirm that the proportion of Ti 3+ and the size of Pd nanoparticles could be controlled by adjusting the electrochemical reduction voltage. The obtained [email protected] exhibited satisfactory catalytic efficiency (TOF: 1302 h −1 ) in the Heck reaction between various aryl halides and olefins. Furthermore, [email protected] demonstrated high stability, with no significant loss of catalytic activity observed even after six cycles.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
SYNLETT
·
2025
·
IF 1.4
Ke-Yang Huang,Ze-Yu Wu,Jun Luo,Chao Jiang
A PdII-catalyzed ortho-C(sp²)−H hydroxylation of benzyl alcohols using oxime ether as a monodentate directing group was developed. The N-acetyl glycine ligand is crucial to the reactivity through facilitating the C−H cleavage. The reaction might involve the formation of hydroxyl radicals generated from oxone and a 6-membered exo-palladacycle intermediate was proposed. Various substituents on the phenyl ring were tolerated in the reaction. Gram-scale reaction and directing group removal were also demonstrated to show its applicability for the syntheses of salicyl alcohols.
研究领域:
有机化学
·
合成化学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Junjing Li,Xu Liu,Zilin Tan,Liang Wang
In order to enhance the catalytic activity of Pd nanoparticles and reduce the amount of Pd, the present study was carried out to construct nanowire structures by surfactant-directed hydration method to further increase the active sites on the surface of Pd and improve the yield of atomic hydrogen (H ⁎ ). The introduction of cheap metal Ni effectively reduced the Pd dosage and increased the utilization of Pd. Nitrogen-doped ordered mesoporous carbon (NOMC) was incorporated to facilitate the dispersion of Pd particles and improve the stability of the catalyst while ensuring the catalytic activity. The prepared palladium-nickel nanowires/nitrogen-doped ordered mesoporous carbon/carbon (Pd-Ni NWs/NOMC/C) electrodes showed excellent efficiency for the removal of halogenated pharmaceuticals and personal care products (PPCPs). The combination of palladium-nickel nanowires (Pd-Ni NWs) with NOMC enhanced the electron transfer capability at the electrode surface and improved the H ⁎ yield. The results showed that the removal efficiency of this electrode for lornoxicam reached 97.2 % at 270 min. The electrode reduced the amount of Pd while stabilizing the electrocatalytic effect. The dechlorination mechanism of Pd-Ni NWs/NOMC/C electrode for lornoxicam was also proposed, and the reaction products and their toxicity were analyzed. This study provided a new idea for designing and synthesizing metal composite catalysts, reduced the cost of catalyst preparation, and had a good application prospect in the treatment of wastewater containing halogenated organic compounds.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）