JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2023
·
IF 6.1
Junshuai Zhang,Cui Du,Chen Zhou,Shengyang Yang
The production of hydrogen and benzaldehyde (BAD) by splitting benzyl alcohol (BA) through photocatalysts is one of the common methods of converting solar energy to chemical energy. Herein, a photocatalyst to achieve high efficiency in hydrogen production was fabricated by loading Cu-Ni bi-metal on the CdS nanorods as a carrier. The 20% Cu 1 Ni 1 /CdS composite catalyst was used for simultaneous photocatalyze H 2 production and BA oxidation to BAD under light with activities of 14.517 and 13.220 mmol g -1 h −1 , respectively, which is 8.7 times and 7.9 times higher than that of pure CdS . The high production efficiency can be mainly attributed to the synergistic effect of Cu-Ni bi-metal and the close contact between Cu-Ni and CdS interfaces. These microstructures enhance light absorption, effectively promote charge separation, and reduce the complexation of photogenerated electrons and holes. This work provides new ideas for the design of a cost-effective catalyst.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 2
·212
·
IF 4.4
Zhuang Tong,Yunliang Liu,Xin Wu,Yuanyuan Cheng,Jingwen Yu,Xinyue Zhang,Naiyun Liu,Xiang Liu,Haitao Li
The luminescence properties and excellent carrier transfer ability of carbon quantum dots (CQDs) have attracted much attention in the field of photocatalysis. In this work, we loaded the CQDs on the surface of Cu2O to enhance the visible-light property of Cu2O. Furthermore, the composite was used for selective oxidation of benzyl alcohol to benzaldehyde. The composite catalyst achieved high selectivity (90%) for benzaldehyde at room temperature, leveraging its visible-light-induced electron transfer properties and its photocatalytic activity for hydrogen peroxide decomposition. ·OH was shown to be the main reactive oxygen species in the selective oxidation reaction of benzyl alcohol. The formation of heterostructures of CQDs/Cu2O promoted charge carrier separation and provided a fast channel for photoinduced electron transfer. This novel material exhibited enhanced levels of activity and stability for selective oxidation of benzyl alcohol. Potential applications of carbon quantum dot composites in conventional alcohol oxidation reactions are shown.
研究领域:
材料科学
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催化化学
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DOI
PubMed
高影响因子
NANO
·
2017
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IF 1.025
Liming Chen,Lulu Zhao,Jie Xu,Jinlin Long,Linxi Hou
Metal-free photocatalysts trithiocyanuric acid (C 3 N 3 S 3 ) and its polymers were one-step synthesized and used for selective aerobic oxidation of benzyl alcohol under visible light. The S–S bridged C 3 N 3 S 3 polymers showed higher oxidation activity with increasing polymerization time and reached a maximum at 40 h. As a major factor, catalysts’ solubility in water at different temperatures (from 298.15 K to 368.15 K) was measured at atmospheric pressure. The obtained data were correlated by polynomial empirical equation and modified Apelblat equation, respectively. Experimental results proved that the solubility of C 3 N 3 S 3 and its polymers increased with increasing temperature. The solubility of C 3 N 3 S 3 polymers with lower polymerization degree (DP) were better than that of parent C 3 N 3 S 3 owing to the hydrophilicity caused by a low symmetry and disorder structure, whereas the higher DP could lead to the decrease of polymer solubility and further affect the photocatalytic activity. Thermodynamic properties of the solution system including the enthalpy ( Δ H S 0 ) and heat capacity ( c p 0 ) were calculated by the modified Apelblat equation.
研究领域:
化学
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材料科学
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DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2019
·
IF 3.621
Hao Zhang,Yilin Dong,Keke Huang,Jingsheng Liu,Bo Dong,Feng Wang
This report describes the synthesis of a series of magnesium complexes bearing sterically congested phenoxide ligands and their catalytic performances in initiating immortal Ring Opening Polymerization of ε -caprolactone and rac -lactide. The magnesium complexes Mg1 - Mg3 were obtained in high yields, by treating bulky phenoxide ligands with half equivalents of Mg( n- Bu) 2 in THF ( Mg1 : Mg(O-2,6-Ph 2 CH-C 6 H 2 -4-Me) 2 (THF) 2 ; Mg2 : Mg(O-2,6-Ph 2 CH-C 6 H 2 -4-OMe) 2 (THF) 2 ; Mg3 : Mg(O-2-Ph 2 CH-C 6 H 2 -4,6- t Bu 2 ) 2 (THF) 2 ), and well-characterized by NMR spectrum analysis. The molecular structures of Mg2 , Mg3 were further determined by single crystal X-ray diffractions. In combination with excess of benzhydrol, these complexes could catalyze immortal Ring Opening Polymerization (ROP) of ε -caprolactone and rac -lactide, and benzhydrol served as co-initiator and chain transfer agents simultaneously, which afforded polymer esters with well-controlled molecular weights and narrow molecular weight distributions. End-functionalized polyester could be also accessed if functionalized benzhydrols were employed as chain transfer agents.
研究领域:
高分子化学
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催化化学
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产品关联
DOI
高影响因子
Catalysts
·
2025
·Vol. 15
·期 5
·442
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IF 4
Zhe Wang,Xiaoliang Li
A series of Pd/g-C3N4catalysts were synthesized using different graphitic carbon nitride precursors, and were found to exhibit significant variations in catalytic performance for solvent-free selective catalytic oxidation of benzyl alcohol. Through comprehensive characterization (XRD, N2-BET, ICP-AES, TEM, and XPS), the experimental results found that the nitrogen chemical configuration and surface Pd2+concentration critically determined the catalytic efficiency. Among the various nitrogen species, N-(C)3-type nitrogen demonstrated the strongest influence on catalytic activity, which was positively correlated with its abundance in g-C3N4matrices. In particular, g-C3N4derived from dicyandiamide contained the highest N-(C)3type nitrogen content. When serving as Pd nanoparticle support, this material simultaneously achieved the best Pd2+surface concentration and catalytic performance compared to the other g-C3N4-supported catalysts.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2020
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IF 7.888
Yang Xu,Jin Li,Jian Zhou,Yufeng Liu,Zhuojun Wei,Hui Zhang
The effects of size and active site structure on catalytic activity were deeply investigated in air oxidation of benzyl alcohol over a series of Ni 3 Al-LDH (layered double hydroxides)-supported Au n nanocluster (NC) catalysts Au n /LDH (n = 25, 38, ~127), obtained by modified electrostatic adsorption of atomically precise Au 25 Capt 18 , Au 38 Capt 24 and Au ~127 -Capt (Capt: captopril) NCs followed proper calcination. Detailed characterizations show that the Au 25 /LDH, Au 38 /LDH and Au ~127 /LDH possess ultrafine Au NCs size of 1.2 ± 0.2, 1.4 ± 0.3 and 1.8 ± 0.5 nm, respectively, which are majorly dispersed on the edge sites of the small-sized LDH nanosheets (20–40 nm). All the catalysts exhibit excellent catalytic activities in air oxidation of benzyl alcohol without external base associated with the remarkable size- and active site structure-dependence. The catalyst Au 38 /LDH shows the highest activity with TOF of 1884 h −1 , which can be attributable to the ultrafine bi-icosahedron structure Au 38 NCs and the strongest Au 38 NCs – Ni-OH (LDH) synergistic effect facilitating the activation of α-C H bond of benzyl alcohol over more negatively charged Au sites upon XPS, CO-DRIFTs and kinetic isotope studies. The findings of the size- and active site structure-dependence of supported Au n cluster catalysts in the oxidation of benzyl alcohol provide important guiding principles for the rational design of supported Au n cluster catalysts.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
·
2021
·Vol. 32
·期 1
·158-169
·
IF 1.838
Zhou Yousheng,Mei Xingyu,Cai Zhe,Wang Qing,Duanmu Jiahui,Kai Ouyang,Zhang Haijiang,Tang Xiujuan,Han Xiaoxiang
A series of metal ion (M = Sn2+, Fe3+, Ni2+, Co2+, Ag+, Cu2+) exchanged tungstophosphoric acid (H3PW12O40; TPA) catalysts with tunable Brønsted/Lewis acidity were synthesized and exploited for the oxidation of benzyl alcohol (BzOH) to benzaldehyde (BzH) using hydrogen peroxide (H2O2) as oxidant. The structure of these M-TPA composite salts was also characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analyses (TGA) and solid-state 31P nuclear magnetic resonance (NMR) probe molecule method. Among these M-TPAs, the Sn1/2H2PW12O40 catalyst, which presented strong Brønsted acidity, the synergistic effect of Brønsted/Lewis and pseudo-liquid characteristic property, exhibited excellent catalytic activity and durability with 98.2% of BzH selectivity and 95.1% of BzH yield. The optimal conditions for the oxidation of BzOH optimized by response surface methodology (RSM) were as follows: n(BzOH)/n(H2O2) = 1:1.25, catalyst amount of 5.5 wt.% to BzOH, water amount of 17 mL, 3.3 h of reaction time, and temperature 393 K. Moreover, further kinetic study confirmed that the reaction order was 2.64 and the activation energy was 21.75 kJ mol-1.
研究领域:
催化化学
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材料科学
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DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 31
·期 1
·1-9
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IF 2.8
Wu Hai-Bo,Zhou Xian-Tai,Zhou Xiao-Wu,Fang Yan-Xiong
As a biodegradable polyester, the commercialized synthesis protocol of poly(ε-caprolactone) (PCL) under mild conditions is of great significance and attractive. Herein, the ring-opening polymerization (ROP) of ε-caprolactone (ε-CL) using FeCl 3 catalyst and benzyl alcohol (BnOH) as the initiator was developed. FeCl 3 has been proved to be an efficient catalyst for the ROP of ε-CL under mild conditions. The conversion of ε-CL to PCL was 98.8% at 60 °C within 4 h, with number-average molecular weight ( M n) and dispersity (PDI) of 1.65 × 10 4 g/mol and 1.28, respectively. Moreover, a coordination-insertion ring-opening polymerization mechanism mediated by FeCl 3 was proposed. Overall, this work is expected to provide a feasible industrial method for the preparation of PCL from the direct aerobic oxidation of cyclohexanone.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
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IF 6.9
Jinghang Chen,Yaqiang Wu,Zihao Cui,Qianqian Zhang,Zeyan Wang,Zhaoke Zheng,Hefeng Cheng,Yuanyuan Liu,Xin Li,Shukui Shi,Baibiao Huang,Peng Wang
The carbonyl compounds synthesized from benzyl alcohol by selective photocatalysis have a wide range of applications in the chemical, pharmaceutical and food industries, while the fine chemical synthesis remains challenged by inefficient carrier separation and inadequate redox potential control in conventional semiconductor systems. The stability and eco-friendly attribute of lead-free bismuth halide perovskites emerge as promising photocatalysts for practical applications. Herein, we design and synthesize a Z-scheme heterojunction between Cs 3 Bi 2 Br 9 and Bi 2 WO 6 by an anti-solvent method. The optimized Cs 3 Bi 2 Br 9 /Bi 2 WO 6 composite demonstrates enhanced photocatalytic performance for benzyl alcohol oxidation, achieving 95 % conversion efficiency with 99 % benzaldehyde selectivity under AM 1.5G irradiation. Systematic in situ characterizations, including electron spin resonance, X-ray photoelectron spectroscopy and diffuse reflectance infrared Fourier-transform spectroscopy, evidence the Z-scheme charge transfer mechanism in Cs 3 Bi 2 Br 9 /Bi 2 WO 6 , track key intermediates during the oxidation pathway, and mechanistically identify superoxide radicals (• O 2 - ) as the predominant active species. This study not only advances the understanding of photocatalytic mechanisms in Z-scheme organic transformations but also provides a foundational framework for the design of efficient photocatalytic systems.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Peng Zhang,Feiming Li,Shujuan Lin,Wen-Jie Chen,Dejian Chen
Lead halide perovskite nanocrystals (PNCs) have emerged as promising materials for photocatalysis due to their exceptional optoelectronic properties, yet achieving efficient charge separation and selective oxidation reactions remains a significant challenge. In this study, we report the synthesis of Fe 3+ -doped CsPbBr 3 /SiO 2 nanocomposites (Fe-PNCs/SNPs) with gradient energy levels, designed to enhance photocatalytic performance. Our results demonstrate that Fe 3+ doping introduces mid-gap states, promotes photoinduced charge separation, and generates reactive oxygen species (ROS) such as O 2 − and OH radicals under sunlight-simulating light irradiation from a 300 W Xe arc lamp. The Fe 20 -PNCs/SNPs catalyst achieved over 99 % conversion of benzyl alcohol to benzaldehyde with high selectivity and stability in the ethanol under ambient conditions. Additionally, the catalyst exhibited excellent recyclability and broad substrate tolerance. These findings highlight the innovative design of gradient energy levels in perovskite nanocomposites, offering a new strategy for enhancing photocatalytic efficiency in selective organic transformations.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2025
·
IF 17.7
Shuang Li,Haili Lin,Xuemei Jia,Xin Jin,Qianlong Wang,Xinyue Li,Shifu Chen,Jing Cao
Although bimetallic phosphide cocatalysts have attracted considerable interest in photocatalysis research owing to their advantageous thermodynamic characteristics, superstable and efficient cocatalysts have rarely been produced through the modulation of their structure and composition. In this study, a series of bimetallic nickel-iron phosphide (Ni x Fe 2– x P, where 0 < x < 2) cocatalysts with controllable structures and overpotentials were designed by adjusting the atomic ratio of Ni/Fe onto nonmetallic elemental red phosphorus (RP) for the photocatalytic selective oxidation of benzyl alcohol (BA) coupled with hydrogen production. The catalysts exhibited an outstanding photocatalytic activity for benzaldehyde and a high H 2 yield. The RP regulated by bimetallic phosphide cocatalysts (Ni x Fe 2– x P) demonstrated higher photocatalytic oxidation-reduction activity than that regulated by monometallic phosphide cocatalysts (Ni 2 P and Fe 2 P). In particular, the RP regulated by Ni 1.25 Fe 0.75 P exhibited the best photocatalytic performance. In addition, experimental and theoretical calculations further illustrated that Ni 1.25 Fe 0.75 P, with the optimized electronic structure, possessed good electrical conductivity and provided strong adsorption and abundant active sites, thereby accelerating electron migration and lowering the reaction energy barrier of RP. This finding offers valuable insights into the rational design of highly effective cocatalysts aimed at optimizing the photocatalytic activity of composite photocatalysts.
研究领域:
材料科学
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化学工程
·
催化科学
✓ 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
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产品关联
DOI
高影响因子
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