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Fabrication of graphene oxide decorated with poly(dimethyl amino ethyl methacrylate) brush for efficient Cr(Ⅵ) adsorption from aqueous solution

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Chinese Journal of chemical engineering 2024年第9期73卷 51-61页

作者： Alireza Nouri Siew Fen Chua Ebrahim Mahmoudi Abdul Wahab Mohammad Wei Lun Ang Department of Chemical and Process Engineering Faculty of Engineering and Built EnvironmentUniversiti Kebangsaan MalaysiaBangi 43600Malaysia Centre for Sustainable Process Technology(CESPRO) Faculty of Engineering and Built EnvironmentUniversiti Kebangsaan MalaysiaBangi 43600Malaysia Chemical and Water Desalination Engineering Program College of EngineeringUniversity of SharjahSharjah 27272United Arab Emirates

Confronting the severe health threats and environmental impacts of Cr(Ⅵ) in aquatic environments demands innovative and effective remediation approaches. In this study, Graphene oxide(GO)-decorated poly(dimethyl amino ethyl methacrylate)(PDMAEMA) brush nanocomposites(GOP1, GOP2, GOP3, and GOP4) were fabricated using atom transfer radical polymerization(ATRP) by the “graft from” *** resulting nanocomposites were utilized for removing Cr(Ⅵ) with good adsorption performance due to the electrostatic interaction of protonated nitrogen groups in the brush chains with negatively charged particles in the solution. The kinetic model of pseudo-second-order best represented the contaminants' adsorption characteristics. The Weber-Morris model further indicated that surface adsorption and intraparticle diffusion mechanisms primarily controlled the adsorption procedure. Additionally, the Langmuir and Temkin isotherm models were found to most accurately represent the adsorption characteristics of the pollutants on the nanocomposites, and GOP4 can achieve the maximum adsorption capacity of 164.4 mg·g^(-1). The adsorbents' capacity maintains above 85% after five cycles of adsorption-desorption. The nanocomposites in this study demonstrate promising potential for eliminating Cr(Ⅵ) from aqueous solutions.

关键词： Graphene oxide PDMAEMA brush Polymerization Nanoparticles Adsorption Chromium

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Recent Advances in Catalytic Carbonylation Reactions in Alternative Reaction Media

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Chinese Journal of Chemistry 2024年第4期42卷 406-429页

作者： Csaba Árvai László T.Mika Department of Chemical and Environmental Process Engineering Faculty of Chemical Technology and BiotechnologyBudapest University of Technology and EconomicsMűegyetem rkp.3H-1111 BudapestHungary

Since the discovery of the hydroformylation(oxo-synthesis or Roelen reaction)and the Reppe-reaction,the transition metal-catalyzed carbonylation reactions,providing versatile,facile,and even atom-economic methods for the selective incorporation of C=O functionality to various skeletons,have gained tremendous importance in synthetic organic chemistry from laboratories to industrial *** carbonylation of carbon-carbon multiple bonds,aromatic halides,triflates,etc.,in the presence of various nucleophiles has led the way to produce aldehydes,carboxylic acids,esters,amides,etc.,in the fine chemical ***,these protocols usually proceed in conventional,fossil-based,and usually toxic reaction ***,several attempts have been directed to developing efficient carbonylation methods in alternative,less harmful,non-fossil-based and even in renewable reaction *** this review,we overview the recent applications of alternative solvents such as water,biomass-based alcohols,γ-valerolactone(GVL),2-methyltetrahydrofuran(2-MeTHF),ionic liquids(ILs),deep eutectic solvents(DES),alkyl levulinates,limonene,α-pinene,and dimethyl carbonate as well as fluorous media to improve efficiency,safety and environmentally benign nature of carbonylation protocols.

关键词： Carbonylation Catalysis Solvents Green chemistry Carbon monoxide Transition metals Homogeneous catalysis Palladium

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A comparison study on hydrophobic and hydrophilic-mixed matrix membranes for diethanolamine removal

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Materials Research Innovations 2025年第4期29卷 262-268页

作者： Rahman, Sunarti Abd Ndia Ntone, Ellora Priscille Alagu, Divyameena Rajeswaran, Dharshini Deepa Shoparwe, Noor Fazliani Mun, Serene Lock Sow Lee, Yeu Yee Faculty of Chemical & Process Engineering Technology Universiti Malaysia Pahang AL- Sultan Abdullah Gambang Malaysia Faculty of Bioengineering and Technology Universiti Malaysia Kelantan Kelantan Kota Bharu Malaysia Department of Chemical Engineering Universiti Teknologi PETRONAS Seri Iskandar Malaysia Kuching Malaysia

This study systematically compares Polyvinylidene fluoride (PVDF) and Polysulfone (PSf) mixed-matrix membranes (MMMs) modified with graphene oxide (GO) for diethanolamine (DEA) removal. PVDF and PSf exhibit distinct interactions with GO due to their inherent hydrophobic and hydrophilic properties, respectively, influencing membrane performance. Membranes were fabricated using the phase inversion method and characterized by Scanning Electron Microscopy (SEM), Fourier-Transform Infrared Spectroscopy (FTIR), and Contact Angle (CA) analysis. Performance testing revealed superior water permeability and DEA rejection for PSf/GO membranes. The PSf/GO-0.5 membrane achieved 91.04% DEA rejection and 47.45 L/m²·h·bar water permeability, outperforming PVDF/GO-0.5, which demonstrated 78.53% DEA rejection and 28.32 L/m²·h·bar water permeability. While GO improved membrane performance, excessive loading caused pore clogging, reducing effectiveness. This study highlights the potential of hydrophilic PSf/GO membranes for efficient amine removal, offering valuable insights for wastewater treatment applications. © 2024 Informa UK Limited, trading as Taylor & Francis Group.

关键词： Fourier transform infrared spectroscopy

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Bifunctional additive phenyl vinyl sulfone for boosting cyclability of lithium metal batteries

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Green chemical engineering 2023年第1期4卷 49-56页

作者： Xiaoyan Zhang Juyan Zhang Mengmin Jia Linshan Peng Nana Zhang Suitao Qi Lan Zhang Shaanxi Key Laboratory of Energy Chemical Process Intensification School of Chemical Engineering and TechnologyXi'an Jiaotong UniversityXi'an710049China CAS Key Laboratory of Green Process and Engineering Beijing Key Laboratory of Ionic Liquids Clean ProcessInstitute of Process EngineeringChinese Academy of SciencesBeijing100190China Faculty of Engineering and Physical Sciences Department of Chemical and Process EngineeringUniversity of SurreyGuildfordGU27XHUK

One of the bottlenecks limiting the cycling stability of high voltage lithium metal batteries(LMBs)is the lack of suitable ***,phenyl vinyl sulfone(PVS)is proposed as a multifunctional additive to stabilize both cathode and anode interfaces as it can be preferentially oxidized/reduced on the electrode *** PVS derived solid electrolyte interphase films can not only reduce the transition metal dissolution on the cathode side,but also suppress the Li dendrite spread on the lithium anode *** Li||Li symmetric battery with PVS addition delivers longer cycle life and a higher critical current density of over 3.0 m Ah cm^(-2).The LiNi_(0.8)Co_(0.1)Mn0.1O_(2)(NCM811)||Li full cell exhibits excellent capacity retention of 80.8%or 80.0%after 400 cycles at 0.5 C or 1 C rate with the voltage range of 3.0–4.3 *** particular,the NCM811||Li cell under constrained conditions remains operation over 150 *** work offers new insights into the electrolyte formulations for the next generation of LMBs.

关键词： Lithium metal battery Ni-rich cathode Phenyl vinyl sulfone Dendrite

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Enhancing biofuel pellet quality using torrefaction and co-pelletization of palm kernel shell and empty fruit bunch

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Environmental Science and Pollution Research 2025年 1-12页

作者： Sang, Chang Siaw Samad, Noor Asma Fazli Abdul Saleh, Suriyati Binti Faculty of Chemical & Process Engineering Technology Universiti Malaysia Pahang Al-Sultan Abdullah Lebuh Persiaran Tun Khalil Yaakob Pahang Kuantan26300 Malaysia

Palm kernel shell (PKS) and empty fruit bunch (EFB) are potential biomass resources for producing solid biofuel for energy applications. However, raw EFB and PKS are not uniform in size and pose rotting behavior. Torrefaction and co-pelletization are both effective methods to improve their combustion and mechanical characteristics. This study aims to investigate the effect of torrefaction temperature and the blending ratio of PKS and EFB on the mechanical and combustion characteristics of co-pellets. Initially, PKS and EFB underwent torrefaction process for 30 min at three different temperatures (210 °C, 240 °C, and 270 °C). Then, both torrefied PKS and EFB were blended at five different ratios (0:100, 25:75, 50:50, 75:25, 100:0) with carboxymethyl cellulose as a binder (10% by weight). The results showed that pellet produced at higher torrefaction temperature at 270 °C resulted in an increment of the higher heating value (HHV) but weaker mechanical strength. Pellet with a blending ratio of PKS to EFB (75:25) torrefied at 240 °C showed the comparatively best pellet quality in terms of HHV (17.94 MJ/kg), high tensile strength (3.5 MPa), low ash content (3.97 wt%), and the lowest density changes (0.66%), which satisfy the standard requirements for commercial pellets, indicating that a high-quality biofuel pellet can be produced using torrefaction and co-pelletization. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2025.

关键词： Fruits

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A comparative study on effectiveness and recyclability of three different deep eutectic solvents for biomass fractionation

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Biomass Conversion and Biorefinery 2025年第9期15卷 13393-13407页

作者： Panakkal, Elizabeth Jayex Cheenkachorn, Kraipat Chuetor, Santi Dasari, Srideep Katam, Keerthi Phusantisampan, Theerawut Cheng, Yu-Shen Sriariyanun, Malinee Department of Chemical and Process Engineering Biorefinery and Process Automation Engineering Center The Sirindhorn International Thai-German Graduate School of Engineering King Mongkut’s University of Technology North Bangkok Bangkok Thailand Department of Chemical Engineering Faculty of Engineering Biorefinery and Process Automation Engineering Center King Mongkut’s University of Technology North Bangkok Bangkok Thailand Department of Chemistry École Centrale School of Engineering Mahindra University Telangana India Department of Civil Engineering École Centrale School of Engineering Mahindra University Telangana India Department of Biotechnology Faculty of Applied Science Biorefinery and Process Automation Engineering Center King Mongkut’s University of Technology North Bangkok Bangkok Thailand Department of Chemical and Materials Engineering National Yunlin University of Science and Technology 123 University Road Section 3 Yunlin Douliu64002 Taiwan

The overuse of non-renewable resources to meet rising energy demands has significantly impacted the environment, necessitating the shift to renewable energy sources. Lignocellulosic biorefineries present a sustainable alternative, producing valuable products. With limited reports on the optimal deep eutectic solvent (DES) pretreatment of Napier grass, this study focuses on optimizing and assessing the recyclability of three different DES pretreatments to enhance sugar and ethanol yields from biomass. Three DES were synthesized by combining choline chloride with lactic acid, glycerol, and urea. The physical properties of these DES were analyzed, followed by the optimization of pretreatment conditions using response surface methodology and one-factor-at-a-time approaches. The optimization considered solid loading (1:20 to 1:5, w/w), temperature (80 °C to 130 °C), and time (0.5 h to 5 h) to maximize sugar concentration. The optimal pretreatments improved cellulose content in the pretreated biomass, enhancing sugar yield in the order: alkaline DES > acidic DES > neutral DES. Ethanol fermentation of pretreated biomass using Saccharomyces cerevisiae showed higher ethanol yields from choline chloride: urea (15.87 g/L), followed by choline chloride: glycerol (14.03 g/L), and choline chloride: lactic acid (13.18 g/L). This study highlights the effectiveness of acidic, alkaline, and polyol-based DES in pretreating biomass, enhancing sugar yield up to 1.6-fold compared to native biomass. Recyclability studies showed decreased efficiency and reduced sugar yield over successive cycles, indicating the need for a purification step. Overall, this research demonstrates the potential of three different DES pretreatments in significantly improving sugar and ethanol yields from Napier grass and underscores the economic viability of DES recycling for industrial applications. These findings could inspire future research in developing advanced techniques for purifying used DES before recy

关键词： Fermentation

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Effect of different solvents on hydrogen production from hydrolysis of potassium borohydride with a new and active Ni-based catalyst synthesized by green synthesis

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International Journal of Hydrogen Energy 2025年 143卷 1098-1107页

作者： Şahin, Ömer Ekinci, Selma İzgi, Mehmet Sait Onat, Erhan Department of Chemical Engineering Faculty of Chemical and Metallurgical Engineering Istanbul Technical University Istanbul Turkey Vocational School of Technical Sciences Department of Chemistry and Chemical Process Technology Batman University Batman Turkey Faculty of Engineering Department of Chemical Engineering Siirt University Siirt Turkey Vocational School of Organised Industrial Zone Department of Electrical and Energy Bitlis Eren University Bitlis Turkey

In this study, a novel Ni-based catalyst supported on carbon quantum dots (CQDs), synthesized from caffeine via a green hydrothermal method was developed to enhance hydrogen generation. The effects of different solvents, including water, and ethanol, on the catalyst's performance were explored. The results demonstrate that the Ni@CQDs catalyst prepared in ethanol exhibited superior hydrogen production rates due to improved nickel dispersion and higher surface area, as confirmed by BET, XPS, and XRD analyses. Ethanol was found to effectively modify the catalyst, resulting in faster H₂ conversion compared to water. The HGR values obtained with catalysts synthesized in water and ethanol were 4662, and 12262 mL min−1g−1, respectively. The study also investigated the impact of KOH concentration, catalyst loading, KBH4 concentration, and temperature on the hydrolysis process. The Ni@CQDs catalyst synthesized in ethanol achieved optimal performance at higher KBH₄ and KOH concentrations, producing 100% H2 yield over six reusability cycles with minimal loss of catalytic efficiency. Thermodynamic analysis using the Arrhenius and Eyring-Polanyi equations indicated that the catalyst in ethanol had a lower activation energy, enhancing the hydrolysis reaction rate. The Ni@CQDs (ethanol) catalyst exhibited a significantly higher TOF of 1696 h⁻1 at 4% KBH4 concentration and a lower activation energy (Ea) of 33.78 kJ mol−1 compared to the Ni@CQDs (water) catalyst, which had a TOF of 601.5 h⁻1 at 2% KBH4 concentration and an Ea of 38.93 kJ mol−1, indicating superior catalytic efficiency with ethanol as the solvent. © 2024 Hydrogen Energy Publications LLC

关键词： Hydrolysis

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Effective and environmentally friendly Co nanocatalyst on sodium borohydride hydrolysis in different solvents

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International Journal of Hydrogen Energy 2025年 142卷 864-874页

作者： Onat, Erhan Ekinci, Selma Şahin, Ömer İzgi, Mehmet Sait Vocational School of Organised Industrial Zone Department of Electrical and Energy Bitlis Eren University Bitlis Turkey Vocational School of Technical Sciences Department of Chemistry and Chemical Process Technology Batman University Batman Turkey Department of Chemical Engineering Faculty of Chemical and Metallurgical Engineering Istanbul Technical University Istanbul Turkey Department of Chemical Engineering Faculty of Engineering Siirt University Siirt Turkey

This study investigates the development and performance of a cobalt (Co) nanocatalyst supported by carbon quantum dots (CQDs) for hydrogen production via sodium borohydride (NaBH₄) hydrolysis. The CQDs were synthesized using a hydrothermal method from caffeine and subsequently used to support the cobalt catalyst. The structure and properties of the synthesized catalyst were characterized using techniques such as X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and energy dispersive spectroscopy (EDX). The catalytic performance was evaluated in various solvents, with the highest hydrogen production rate observed in ethanol. The optimal conditions for Co@CQDs catalyst synthesis were identified as an 8-h hydrothermal treatment with a 3 mmol metal loading. The catalyst demonstrated excellent reusability, maintaining 100% hydrogen production efficiency after seven cycles. The activation energy for the hydrolysis reaction was found to be lower for catalysts synthesized in ethanol (25.48 kJ mol−1) compared to those synthesized in water (35.57 kJ mol−1), indicating enhanced catalytic activity. Under optimum conditions, the hydrolysis reaction in the presence of Co@CQDs (water) catalyst produced 23753 mL min−1 g−1 of hydrogen, while the hydrolysis reaction in the presence of Co@CQDs (ethanol) catalyst produced 28751 mL min−1 g−1. This study highlights the potential of CQDs-supported Co nanocatalysts for efficient and sustainable hydrogen production. © 2025 Hydrogen Energy Publications LLC

关键词： Nanocrystals

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Impact of temperature and forward osmosis membrane properties on the concentration polarization and specific energy consumption of hybrid desalination system

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Environmental Science and Pollution Research 2024年第22期31卷 32246-32263页

作者： Goi, Yi Ken Liang, Yong Yeow Faculty of Chemical and Process Engineering Technology Universiti Malaysia Pahang Al-Sultan Abdullah Lebuh Persiaran Tun Khalil Yaakob Pahang Kuantan26300 Malaysia

This study investigates how temperature and forward osmosis (FO) membrane properties, such as water permeability (A), solute permeability (B), and structural parameter (S), affect the specific energy consumption (SEC) of forward osmosis-reverse osmosis system. The results show that further SEC reduction beyond the water permeability of 3 LMH bar-1 is limited owing to high concentration polarization (CP). Increasing S by 10-fold increases FO recovery by 177.6%, causing SEC decreases by 33.6%. However, membrane with smaller S also increases external CP. To reduce SEC, future work should emphasize mixing strategies to reduce external CP. Furthermore, increasing the temperature from 10 to 40 °C can reduce SEC by 14.3%, highlighting the energy-saving potential of temperature-elevated systems. The factorial design indicates that at a lower temperature, increasing A and decreasing S have a more significant impact on reducing SEC. This underlines the importance of developing advanced FO membranes, particularly for lower-temperature processes. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Desalination

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Optimization of N,N’-methylenebis(acrylamide), and ammonium persulfate content in carbonaceous/acrylic acid-co-acrylamide superabsorbent polymer

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Materials Today: Proceedings 2022年 57卷 1088-1094页

作者： Mazlan, S.N.A. Abd Rahim, S. Ghazali, S. Jamari, S.S. Faculty of Chemical & Process Engineering Technology College of Engineering Technology Universiti Malaysia Pahang Pahang Gambang26300 Malaysia

Carbon filler addition in the superabsorbent polymers (SAP) network shows excellent water absorption capability. However, other than filler, the water absorbency was also influenced by crosslinker, initiator, and monomer contents during the SAP synthesis. This work aimed to optimize the amount of N,N’-methylenebisacrylamide (NNMBA) as a crosslinker, and ammonium persulfate (APS) as initiator using Response Surface Methodology (RSM) for carbonaceous/acrylic acid-co-acrylamide based SAP (C-SAP) synthesis. Inverse suspension polymerization was used for the C-SAP synthesis with a fixed amount of acrylic acid, acrylamide, and carbonaceous filler at 70 °C for 3 h. The characteristics of the C-SAP were further analyzed using the tea bag method, FTIR, and FESEM. The highest water absorbency recorded is 453.11 g/g at 0.006 wt% APS and 0.0009 wt% NNMBA with R2 of 0.9077, which is low content of crosslinker and initiator. Overall, optimum crosslinker and initiator are important parameters that increase the prospect of C- SAP, particularly in agricultural applications. © 2021

关键词： Ammonium persulfate

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