Coatings
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2023
·Vol. 13
·期 2
·431
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IF 3.4
Chao Liu,Zhenxiang Chen,Ruiqin Kang,Jing Wang,Qingwei Lu,Tao Wang,Dayong Tian,Ying Xu,Zhan Wang,Huiping Ding
The fabrication of a green, high activity and low-cost carbon-based catalyst capable of activating new oxidant (peroxymonosulfate, PMS) for contaminants abatement is needed. In this research, we prepared novel N-doped biochars via one-step pyrolysis of algal sludge without external nitrogen sources. The obtained ASBC800 possessed the largest specific surface area (SBET= 145.596 m2g−1) and thus it displayed the best catalytic performance, as revealed by the effective elimination of sulfadiazine (SDZ, >95% within 70 min) with 0.2 g L−1ASBC800 and 0.5 mM PMS. Both radical species (e.g., SO4•−, and•OH), and nonradical regime (1O2and electron-transfer) contributed to SDZ oxidation, in which ASBC800 played essential roles in activating PMS, accumulating SDZ, and regulating electron shuttle from SDZ to ASBC800-PMS*. Overall, this work not only provides a novel strategy for the synthesis of N-rich and cost-effective biochar but also promotes the development and application of carbon-based functional materials in environmental remediation.Keywords:peroxymonosulfate;pre-adsorption;oxidation;electron-transfer;N doping
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2021
·
IF 5.876
Anqi Sun,Ying Wu,Zhenjiang He,Peng Bai,Jiafei Lyu,Xianghai Guo
The flexible metal-organic framework MIL-53(Cr) has been demonstrated to be an efficient adsorbent for liquid phase adsorption and separation, while the effect of this attractive “breathing effect” on its performance remains uncertain. In this research, by increasing the amount of introduced water, MIL-53(Cr) first shrank into a narrow pore form through bound water and then reopened due to the introduction of free water. Using MIL-53(Cr) with diverse amounts of water as an adsorbent, the liquid-phase adsorption and separation of C8 aromatics, including o -xylene (OX), p -xylene (PX), m -xylene (MX) and ethylbenzene (EB), was manipulated by the pre-adsorbed water in MIL-53(Cr). Pre-adsorbing water in MIL-53(Cr) induced a preference reversal between MX and PX, where dry samples preferentially adsorbed MX, while high-water-addition samples preferred PX instead. In addition, the reopened MIL-53(Cr) with high water addition hardly adsorbed EB, thereby increasing the selectivity of xylene isomers to EB. A longer equilibrium time was observed on MIL-53(Cr) with high water addition, during which the adsorption preference shifted from OX to MX to PX. Further molecular simulation provided a microscopic explanation that water molecules in the pores tended to package around MX and EB, hindering their interaction with frameworks or other adsorbates.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2016
·Vol. 133
·期 20
·
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
Catalysts
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2022
·Vol. 12
·期 5
·485
·
IF 4.501
Chong Chen,Yun Li,Jilin Cao
Methane hydrate has been extensively studied as a potential medium for natural gas storage and transportation. Due to their high specific surface area, tunable porous structure, and surface chemistry, metal–organic frameworks are ideal materials to exhibit the catalytic effect for the formation process of gas hydrate. In this paper, hollow ZIF-8 nanoparticles are synthesized using the hard template method. The synthesized hollow ZIF-8 nanoparticles are used in the adsorption and methane hydrate formation process. The effect of pre-adsorbed water mass in hollow ZIF-8 nanoparticles on methane storage capacity and the hydrate formation rate is investigated. The storage capacity of methane on wet, hollow ZIF-8 is augmented with an increase in the mass ratio of pre-adsorbed water and dry, hollow ZIF-8 (RW), and the maximum adsorption capacity of methane on hollow ZIF-8 with aRWof 1.2 can reach 20.72 mmol/g at 275 K and 8.57 MPa. With the decrease inRW, the wet, hollow ZIF-8 exhibits a shortened induction time and an accelerated growth rate. The formation of methane hydrate on hollow ZIF-8 is further demonstrated with the enthalpy of the generation reaction. This work provides a promising alternative material for methane storage.
研究领域:
材料科学
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能源存储
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化学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Jing Wu,Mei Lin,Xiulan Weng,Gary Owens,Zuliang Chen
Emerging contaminants such as Mitoxantrone (MTX) are a major environmental concern because they have potential genotoxicity and mutagenesis to both aquatic organisms and humans. In this study, a pre-adsorption/Fenton-like oxidation system was developed which used a reduced graphene oxide/iron nanoparticles hybrid (rGO/Fe NPs) as both the adsorbent and the Fenton catalyst to remove MTX from solution. While the addition of H 2 O 2 alone removed only 11.3% of MTX, the rGO/Fe NPs/H 2 O 2 system was significantly more efficient removing 99.8% of MTX in the same period. This indicated that rGO/Fe NPs had excellent catalytic activity even at pH 7. This efficient removal was attributed to significant production of ·OH mainly by heterogeneous catalysis but supplemented by a homogeneous Fenton reaction, where ·OH had a higher affinity for MTX than SO 4 − ·. The sequential Fenton-like oxidation process best fits a pseudo-second-order kinetic model (R 2 ≥ 0.974). Characterizations of rGO/Fe NPs before and after the reaction, together with the identification of specific MTX degradation products , allowed possible degradation pathways to be proposed together with insights into the underlying mechanisms of MTX degradation when using rGO/Fe NPs in a pre-adsorption/Fenton-like oxidation system. Finally, the rGO/Fe NPs developed was successfully applied for the removal of MTX from spiked wastewater with 93.6% removal efficiency, which indicated that the proposed system had significant potential for wastewater treatment applications.
研究领域:
环境科学
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纳米技术
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水处理
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催化
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产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2022
·
IF 4.177
Shenggui Liu,Chaojiang Li,Hossain Md Jaber,Yuxin Yang,Fan Zhang,Hui Jin
Electrodeposition holds excellent potential for creating controllable nanoscale functional interfaces. However, the key characteristics of these processes remain elusive, especially the composite electrodeposition processes involving inert nanoparticles. Herein, the pre-adsorption of inert particles is considered in detail in electro-codeposition. The nucleation and growth mechanism of nickel nanoparticles under the influence of pre-adsorbed inert particles is studied in a choline chloride–ethylene glycol deep eutectic solvent (DES). Cyclic voltammetry results show that pre-adsorbed TiO2 particles can significantly increase the cathodic reduction current, while codeposited TiO2 particles hinder the reduction process. Chronoamperometry analysis demonstrates that pure Ni electrodeposition in a DES follows the mechanism of instantaneous nucleation and tridimensional growth at a high potential, while the Ni electrodeposition deviated from the instantaneous nucleation model due to the pre-adsorption of TiO2 particles. Moreover, considering the classical model description of multiphase 3D nucleation and diffusion-controlled growth, the typical kinetic parameters such as nucleation rate constant and diffusion coefficient were investigated under different applied potentials. It was found that the nucleation rate constant of Ni electrodeposition increased significantly in the presence of pre-adsorbed TiO2 particles. These findings are of great significance for understanding and perfecting the electro-codeposition process containing inert nanoparticles.
研究领域:
材料科学
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电化学
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纳米技术
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DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Cailing Chu,Fei Tan,Jingyu Wang,Tiejun Liu,Zhenghe Xu,Dejun Sun
The dispersion of magnesium hydroxide (Mg(OH)2) particles in kerosene is crucial for the pyrolytic treatment of radioactive organic liquid wastes yet is severely hindered by water preadsorbed on particle surfaces from ambient air. This work investigated the effect of preadsorbed water on the dispersion stability and rheological properties of Mg(OH)2 particles in kerosene. We correlated preadsorbed water content with the suspension’s microstructure and rheology and revealed that powerful capillary attractions between particles induced by preadsorbed water can negate the stabilizing action of surfactants. Mg(OH)2 particles with 8.1% preadsorbed water (mostly in the state of capillary water) formed large, robust aggregates in kerosene, resulting in a higher storage modulus (92 kPa) of the concentrated suspension. Even with the addition of a surfactant polyoxyethylene alkyl ether carboxylic acid (CE10Ac), the storage modulus remained high at 1.8 kPa due to the dominant capillary forces. To overcome this challenge, we proposed a synergistic approach combining particle predrying with surfactant modification. Predrying particles can eliminate the capillary forces by removing the capillary water and enable the effective adsorption of CE10Ac molecules onto individual particle surfaces. This strategy promotes strong steric and solvation stabilization, yielding stable, low-viscosity (<40 mPa·s) suspensions. These findings offer a practical route for preparing advanced materials for radioactive waste treatment.
研究领域:
胶体与界面科学
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材料科学
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化学工程
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核废物处理
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物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Fei Wang,Mengqi Liu,Peng Zhang,Yifan Xu,Daiming Liu,Guodong Zhang
Although methane-dense storage is anticipated in wet nanoporous materials using the synergy of adsorption and hydration (the so-called adsorption–hydration natural gas, AHNG), the understanding of this technology is still insufficient, which limits its large-scale application. Here, new insights into the AHNG technology are presented, including new findings, phenomena, problems, and solutions, which are helpful to improve the understanding of this technology, enhance methane storage density, and pave the way for its application. Both synergy and antagonism between adsorption and hydration were observed; the synergy increases methane storage capacity, while the antagonism weakens the adsorption and hydration efficiency. In addition, two special phenomena were discussed, which have never been noticed by the hydrate community, and artificial intelligence was thought to provide an effective method for material design, while a storage cell was suggested to improve inner mass transfer of AHNG storage tanks.
研究领域:
储能
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材料科学
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化学工程
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纳米技术
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材料设计中的人工智能
✓ 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）