JOURNAL OF CATALYSIS
·
2025
·
IF 6.5
Lumei Wang,Dezhang Ren,Junyu Lang,Kangqi Gao,Xiao Du,Yong Yang,Zhibao Huo
Although homogeneous acid catalysts have been widely utilized in the production of solketal from glycerol, a significant aspect of the biodiesel industry, challenges remain, including the high corrosiveness of the catalysts and their excessive usage. In this study, a composite material of wCo(NO 3 ) 2 /γ-Al 2 O 3 was synthesized through an adsorption–desorption approach based on wet impregnation, achieving a Co(II) loading of only 1.8 wt%, which demonstrated a solketal yield of 84 % at 80 °C, significantly outperforming the catalytic activity of Co(NO 3 ) 2 . Even when the amount of Co(NO 3 ) 2 was increased to 22-fold that of the Co(II) content in wCo(NO 3 ) 2 /γ-Al 2 O 3 , the solketal yield only reached 67 %. Through systematic physicochemical characterization and theoretical calculations, it is revealed that Co(NO 3 ) 2 can be uniformly dispersed in an amorphous state on the surface of γ-Al 2 O 3 . Furthermore, γ-Al 2 O 3 facilitates a reduction in the orbital binding energy of Co and N within Co(NO 3 ) 2 . The synergistic effects of Co(II), NO 3 − , and γ-Al 2 O 3 contribute to decreasing the rate-determining energy of the ketalization reaction, thereby promoting the dehydration reactions of glycerol and acetone. Furthermore, this strategy is equally applicable to other soluble Co, Ni, and Cu salts, demonstrating universality. This method effectively reduces the usage of metal salts in the solketal synthesis process, enhancing the acid catalytic activity of the metal salts, providing an adsorption–desorption approach based on wet impregnation for the development of low-dose, highly active, and low-corrosive acid catalytic materials.
研究领域:
化学工程
·
催化材料科学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Qingjie Luan,Xiangdong Xue,Hongtai Feng,Lu Tao,Dongxue Zhou,Tengfei Chen,Mengxi Tan,Wenjun Dong
Molecular-type cocatalysts can achieve the maximum electron transfer and minimum light absorption loss by virtue of their size advantage. Herein, a novel hydrophilic molecule-semiconductor hybrid P 4 @Vs-ZnIn 2 S 4−x photocatalyst was successfully developed by in-situ P 4 molecular anchoring on S defect ZnIn 2 S 4−x (V S -ZnIn 2 S 4−x ). The electron-rich P 4 molecules are anchored on the Zn-S 4 surface through S vacancies, forming Zn-P and S-P bonds that can promote electron injection from the electron-rich P 4 molecular to Vs-ZnIn 2 S 4−x substrate and reduce the adsorption/desorption barrier of H intermediate on S atom of Zn-S 4 plane. Meanwhile, the electrostatic potential depression around P 4 promoted the directional migration of in-plane photogenerated electrons, and pooled electrons to the highly active P sites and S sites, thereby accelerating the kinetics of hydrogen evolution. As a result, P 4 @Vs-ZnIn 2 S 4−x achieves an optimal photocatalytic hydrogen evolution activity of 26.1 mmol g −1 h −1 under visible light, which is 6.2 times higher than 4.2 mmol g −1 h −1 for Vs-ZnIn 2 S 4−x .
研究领域:
材料科学
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化学
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DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Huangyu Yan,Guojie Zhang,Ying Xu,Qiqi Zhang,Jun Liu,Guoqiang Li,Yuqiong Zhao,Ying Wang,Yongfa Zhang
In recent years, amine functionalized materials have attracted great interest as prospective solid adsorbents for CO 2 capture. However, the amine functionalization of traditional supports (such as SBA-15, etc.) can lead to a decrease in the pore volume and specific surface area of the adsorbent, which significantly affects the CO 2 adsorption–desorption kinetics. To overcome this problem, the macro-/mesoporous multimodal pore silica was quickly synthesized using a ternary nonionic surfactant as a template through a partitioned collaborative self-assembly method, and impregnated with TEPA. The prepared support HMS-4 h has bimodal pores (pore size of 9.41 nm and 90 nm), which can not only improve the dispersibility of the loaded TEPA, but also effectively reduce the diffusion resistance of CO 2 . At the same time, the high surface area (838 m 2 /g) and large pore volume (2.34 cm 3 /g) of HMS-4 h can further improve the adhesion and quantity of amine-based active sites. The highest adsorption capacity reaches 6.04 mmol/g for HMS-4 h-75%TEPA at 90 ℃ and 1 bar. The adsorption capacity for HMS-4 h-75%TEPA was steady after 10 adsorption–desorption cycles. BET, XRD, FT-IR, SEM, TG-DTG were used to characterize the performance of the adsorbent. The CO 2 adsorption mechanism and the effects of organic amine loading, adsorption temperature and CO 2 concentration on CO 2 adsorption performance were systematically studied. The research shows that HMS-4 h-75%TEPA is an excellent adsorbent with high adsorption capacity in a wide temperature range, and low energy. This provides a reference for the design of high-performance solid amine CO 2 adsorbents in the future.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
Green Chemical Engineering
·
2023
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IF 0
Chi Ma,Lihong Zhao,Zhengxin Mao,Hao Su,Qingfen Liu
Industrial pharmaceutical wastewater usually contains butyl acetate (BA) with a concentration of 1 wt%–7 wt%, and the traditional method for BA recovery is distillation with high energy consumption. Adsorption method is developed to recover BA with low concentration for the high efficiency and low energy consumption. Medium polar polyacrylate resins with macroporous structure of 233.1 nm and average particle size of about 526.5 μm are successfully synthesized by suspension polymerization and used for the BA adsorption and desorption. The maximum adsorption capacity reaches 171.1 mg g −1 with relative standard deviation (RSD) value of 0.2%, which is more than twice the results in the literature. The BA desorption rate is 97.0% at 100 °C with RSD value of 0.4%, and the resins are beneficial to the reuse in the adsorption-desorption cycle. The adsorption thermodynamics and kinetics are investigated, and the BA adsorption is a spontaneous and endothermic process with the increase of disorder degree. This process is mainly contributed by physical absorption and agree well with Freundlich model and pseudo-first-order adsorption kinetic model. The adsorption method avoids boiling a large amount of wastewater and hopefully provides a novel alternative technology for the BA recovery.
研究领域:
环境科学
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化学工程
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DOI
JOURNAL OF APPLIED POLYMER SCIENCE
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2016
·Vol. 133
·期 20
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IF 1.866
Conglu Zhang,Lei Zhu,Wei Li,Xin Zheng
A porous magnetic quaternary chitosan salt (pre-CS/EPTAC/Fe 3 O 4 ) was successfully prepared via a kind of novel method of preadsorption and desorption. The physicochemical properties of pre-CS/EPTAC/Fe 3 O 4 were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, and vibrating sample magnetometry. The adsorption of pre-CS/EPTAC/Fe 3 O 4 for methyl orange (MO) showed much higher dye uptakes compared with Npre-CS/EPTAC/Fe 3 O 4 without the preadsorption and desorption of MO, and the maximum adsorption capability for MO was 486.1 mg/g. Adsorption isotherms and adsorption kinetics were well fitted by the Freundlich isotherm model and the pseudo-second order model, respectively. Thermodynamic parameters, such as the standard free energy change, enthalpy change, and entropy change, were also calculated; this indicated that the adsorption was spontaneous and exothermic. The introduction of MO preadsorption and desorption into the process of preparation improved not only the adsorption of MO but also the adsorption of acid red 1 and orange G. Furthermore, pre-CS/EPTAC/Fe 3 O 4 particles could be easily regenerated and remained almost constant (98.5%) for six cycles of adsorption and desorption. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43448
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ACS Omega
·
2019
·
IF 2.584
Bo Lin,Aiyong Wang,Yanglong Guo,Yuanqing Ding,Yun Guo,Li Wang,Wangcheng Zhan,Feng Gao
Co-, Ni-, and Zn-containing MOFs are prepared and then pyrolyzed to generate materials for ambient temperature NO adsorption. Materials containing Co are much more efficient for NO adsorption than those containing Ni and Zn; therefore, Co is identified as the active phase. The best performing material studied here achieves 100% low concentration (10 ppm) NO adsorption for more than 15 h under a weight hourly space velocity of 120 000 mL g–1 h–1. Powder X-ray diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared, and Raman spectroscopies, along with scanning electron microscopy and TEM, are used to probe the physicochemical properties of the materials, particularly the Co active phase, and chemistries involved in NO adsorption–desorption. NO adsorbs on oxygen-covered Co nanoparticle surfaces in the form of nitrates and desorbs as NO at higher temperatures as a result of surface nitrate decomposition. NO storage capacity decreases gradually upon repeated NO adsorption–desorption cycles, likely because of Co3O4 formation during these processes.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
PubMed
高影响因子
Cell Reports Physical Science
·
2022
·
IF 7.832
Chen Gu,Peng Tan,Teng-Yao Jiang,Xun-Qiang Wang,Bin Hu,Xiao-Qin Liu,Lin-Bing Sun
Solid-adsorbent-based temperature swing adsorption (TSA) technology is intriguing in CO 2 capture, and the predominant energy consumption lies in the temperature swing process. Inspired by the self-regulation of lizards, here, we design a solar-radiation-induced adsorption/desorption system, avoiding additional energy supply for the temperature swing process. In this system, adsorbents filled in a reversible quartz device are covered by radiative cooling coating. With the demand of adsorption and desorption, the temperature of adsorbents can be regulated by radiative cooling and solar heating, respectively. Adsorption tests for over 1 year using the metal-organic framework HKUST-1 as an adsorbent demonstrate that the CO 2 working capacity of our system is higher than most industrial TSA with various adsorbents. Furthermore, our system can save more than 80% of the energy input for industrial TSA technologies.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
SOLAR ENERGY
·
2018
·
IF 4.374
Huajun Chen,Wenjie Tian,Wuxiu Ding
Metallic sliver-doped mesoporous Al 2 O 3 fibers (meso-Ag/Al 2 O 3 ) that can harvest visible light to speed up solar water purification, were synthesized by one-pot hydrothermal method. Insightful analyses of XRD, XRF and XPS of meso-Ag/ Al 2 O 3 verified that metallic silver occupied interstitial positions of Al 2 O 3 lattice forming interstitial solid solution. N 2 adsorption/desorption illustrated that meso-Ag/Al 2 O 3 exhibited significantly increases in the specific surface area, pore volume and average pore diameter after doping with silver. The UV–Vis diffuse reflectance spectra and disinfection performance indicated that meso-Ag/Al 2 O 3 can harvest visible light to promote the conversion of dioxygen to ROS for water disinfection compared with the widely used TiO 2 . With our approach, we achieved water disinfection of >99.999% inactivation of bacteria in 120 min with a small amount of material (8 mg/L) under simulated visible light.
研究领域:
环境科学
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材料科学
·
水处理
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产品关联
DOI
高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2025
·
IF 13.5
Qinhui Guan,Yuhao Guo,Na Li,Jing Li,Tingjiang Yan
In the realm of photocatalytic CO 2 hydrogenation, the adsorption-desorption behaviors and dynamics of photogenerated carriers are pivotal determinants of the kinetic processes and overall efficiency of photocatalytic reactions. Herein, 5A molecular sieve-functionalized In 2 O 3 composites (denoted as IO@5A- x wt%) were fabricated through a facile impregnation-calcination method. Among them, the IO@5A-5wt% composite, with the optimized loading amount of 5A molecular sieves, showcases outstanding performance in photocatalytic conversion of CO 2 to CO, achieving a CO production rate of 2610.55 μmol·g −1 ·h −1 , which is 19 times higher than that of pristine In 2 O 3 . Moreover, the IO@5A-5wt% composite maintains acceptable catalytic stability after a prolonged experiment lasting 45 hours and total of 108 cycles. A comprehensive series of characterization techniques and performance evaluations reveal that the incorporation of 5A molecular sieves significantly modulates the adsorption-desorption behavior and hole dynamics during photocatalytic reactions. The multi-channel architecture of 5A molecular sieves, featuring suitable pore sizes, effectively enhances CO 2 adsorption. Meanwhile, the surface hydroxyl groups of 5A molecular sieves facilitate the transfer of photogenerated holes, thereby suppressing the recombination of photogenerated carriers. Additionally, the reaction product H 2 O desorbs more readily from the catalyst surface. These synergistic effects collectively constitute the key mechanism underlying the enhanced photocatalytic performance of the IO@5A-5wt% composite.
研究领域:
光催化
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材料科学
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环境化学
·
纳米技术
·
催化作用
✓ 已验证
产品关联
DOI
高影响因子
INDOOR AND BUILT ENVIRONMENT
·
2025
·
IF 2.9
Pengfei Zhang,Wenjian Han,Bo Zhou,Haiqian Zhao
The metal-organic framework MIL-100(Fe) is a novel humidity-regulating material, but it has poor water vapour desorption performance. To address this issue, MIL-100(Fe) was modified using 20% lithium chloride (LiCl), forming stable coordination bonds through ion-dipole interactions. These bonds attract water molecules, enhancing the adsorption capacity and improving the structural stability of the material. After modification, its moisture capacity was increased by 2.42 times, and the desorption amount was increased by 7.22 times, with an overall improvement in moisture adsorption–desorption equilibrium. However, the use of inorganic salts presents a leakage problem in high-humidity environments. To counter this, a 3% ethyl cellulose (EC) coating was applied to the modified MIL-100(Fe). Through surface interactions, this modification improved the material's adsorption performance in non-polar environments, preventing deliquescence in long-term high-humidity conditions. The hydrophobic angle of the modified composite material reached 93°, making the surface hydrophobic. The moisture capacity of the composite material was 1.83 times that of the pure MOF, and the desorption amount was increased by 5.2 times, significantly enhancing the material's environmental humidity regulation performance. Additionally, the material demonstrated good reusability, extending its lifespan, making it suitable for use as an intelligent humidity control material in construction.
研究领域:
材料科学
·
环境功能材料
·
纳米多孔材料
·
建筑节能
·
智能响应材料
✓ 已验证
DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Ren Li,Yueyuan Zhu,Xiuwen Zhang,Shuangying Li,Dong Wang,Zhaopeng Liu,Xinyao Wang,Yushun Hou,Shaoxiang Li
This article presents the synthesis of a porous hybrid material, comprising a melamine-terephthaldehyde-based two-dimensional π-conjugated covalent organic framework (COF) grown on a zinc-based metal-organic framework-5 (MOF-5). This hybrid material serves as a drug-loading platform for delivering penicillin G sodium salt. The material leverages the unique interactions between its benzene ring structure and β-lactam drugs, such as penicillin G sodium salt, as well as π-π stacking interactions, cations, and aromatic systems for drug adsorption. The pH responsiveness of the release phase is attributed to the attack of hydrogen ions on these interactions within the corrosion inhibition system. SEM, infrared spectrometry, and X-ray diffraction results confirm the successful synthesis of MOF@COFs. Drug adsorption experiments indicate that the material's maximum loading capacity reaches 51.23 % ± 0.57. Release experiments at different pH levels reveal that MOF@COFs exhibit pH responsiveness, achieving an optimal release rate and duration at pH 5.0, with a release time of approximately 12 h. Bacterial and biological toxicity tests confirm the material's expected antibacterial efficacy and safety for practical applications.
研究领域:
材料科学
·
药物化学
·
纳米技术
·
药物递送系统
·
生物无机化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sensors
·
2025
·
IF 9.1
Junming Shao,Renjun Si,Hongze Jiang,Shaofeng chen,Jiabao Ding,Zheng Wang,Shunping Zhang
Aiming at the issue of poor selectivity in metal oxide gas sensors, a novel MEMS gas sensor structure was designed, comprising an adsorption unit and a sensing unit. Based on this design, a gas-sensing method utilizing on-chip programmable temperature analysis technology was developed. By quantifying the gas-sensitive response, we successfully extracted the peak signal of temperature-dependent resistance with high selectivity. The performance results show that ZSM-5, as the adsorbent material, exhibits desorption peak positions at different temperatures for four types of alcohol gases, and the peak height is correlated with the adsorption concentration. The essence of its high selectivity lies in the fact that materials have different desorption activation energies for different gases under the same conditions. This study proposes a new selective MEMS device testing method for identifying gas types and concentrations.
研究领域:
微纳传感技术
·
气体传感
·
材料科学
·
分析化学
·
半导体器件
·
环境监测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）