JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Yuzhi Liu,Chuang Wu,Wei Gao,Shuang Zhong,Wenbing Zhao,Shuai Xia,Haiyang Yu,Nan Shao,Yu Gao,Donglei Zou
Tailwater treatment from high-standard plastic-cleaning wastewater and red mud (RM) resource recycling pose major challenges. In this study, a heterogeneous microwave-responsive catalyst, RM/biochar (RM/BC), was successfully prepared to synergistically integrate magnetic and dielectric losses for activation of sodium percarbonate (SPC) to degrade the plastic additive diethyl phthalate (DEP). Characterization analyses revealed that under oxygen-limited conditions at 600 °C, poplar leaf powder was fully carbonized, while Fe 2 O 3 in RM was reduced to FeO and further transformed into Fe 3 O 4 , forming a composite dominated by amorphous carbon and Fe 3 O 4 . In RM/BC-600, Fe 3 O 4 and amorphous carbon collaboratively enabled dual hot-spot effects under microwave irradiation via magnetic and dielectric losses, accompanied by enriched oxygen vacancies. Hydroxyl radicals (•OH) were identified as the dominant reactive oxygen species (ROS) in SPC activation. Through single-factor and response surface optimization, under conditions of 40 μM DEP concentration, 4.03 mM SPC dosage, 6.24 g/L RM/BC-600 dosage, 87.2 °C reaction temperature, and 100 W microwave power, the optimal DEP removal efficiency reached 96.1 %. In-situ FTIR/Raman spectroscopy and EPR analysis demonstrated that RM/BC primarily facilitated SPC decomposition to hydrogen peroxide, with oxygen vacancies catalyzing hydrogen peroxide to generate •OH as the main ROS, supplemented by carbonate radicals (•CO 3 − ), superoxide radicals (•O 2 − ), and singlet oxygen ( 1 O 2 ), while dual hot-spot effects accelerated this process. HPLC-QTOF-MS identified 12 intermediate products, and plausible degradation pathways were proposed. ECOSAR software predicted reduced acute toxicity of degradation products, and seed germination assays confirmed minimal ecotoxicity of RM/BC to soil-plant systems. This study achieves RM resource recovery and hazard mitigation via a green strategy, enhancing plastic wastewater treatment through DEP detoxification and stability.
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GREEN CHEMISTRY
·
2025
·
IF 9.2
Jie Chen,Ruilan Li,Yongzhi Duan,Shuaiqi Gong,Yulin Min,Hexing Li,Penghui Shi
The cyclic regeneration of non-renewable graphite anode materials in lithium-ion batteries (LIBs) is crucial for battery recycling, aiming to reduce carbon footprints and minimize resource waste. Traditional methods often involve high energy use and significant environmental pollution. To tackle this, a green, closed-loop regeneration method using only oxalic acid was developed. This approach efficiently recovers precious metals from the anode and allows for in-situ regeneration of the spent anode, as well as the synthesis of pre-lithiation reagents. The findings indicate that lithium oxalate on the surface of pre-lithiated regenerated graphite compensates for active Li+ loss and acts as a pre-lithiation sacrificial salt during battery operation. It also decomposes to release carbon dioxide, preventing the formation of soluble lithium alkoxides and electrolyte ester exchange reactions, significantly enhancing battery performance without leaving impurities. This method allows effective lithium utilization from spent anodes and in-situ closed-loop regeneration. Under optimal conditions, the Li+ leaching rate reaches 97.64%. The electrochemical performance of the regenerated prelithiated graphite maintains a high specific capacity of 320.5 mAh·g−1 after 200 cycles, with a specific capacity retention rate of 90.4%. Environmental and economic assessment shows outstanding economic advantages of $3,259.22 and negligible environmental footprint for recycling each 1.0 ton of retired graphite. This work advances material recycling, reduces the environmental impact of waste batteries, and supports a low-carbon transition.
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FOOD CHEMISTRY
·
2024
·
IF 8.5
Zhenqian Wei,Weiyan Zhang,Menghao Du,Haiyan Zhong,Xuezhi Fang
Camellia saponins are important by-products of Camellia Oleifer Abel. processing. In this study, an eco-friendly method based on natural deep eutectic solvents (NaDESs, proline and glycerol at a molar ratio of 2:5) was established to extract saponin s from C.oleifera cakes. The content of saponin (702.22 ± 1.28 mg/g) obtained using NaDES was higher than those extracted using water or methanol. UPLC-Q-TOF MS analysis of chemical structure showed that the difference in the extraction technique alter individual saponins. A widely targeted metabolomic approach and KEGG metabolic pathway analysis showed that the upregulated metabolites in the NaDES-based extract mainly included flavonoids, alkaloids, and phenolic acids; and they were involved in arginine and proline metabolism, metabolic pathways, phenylpropanoid biosynthesis, biosynthesis of secondary metabolites, and flavonoid biosynthesis. The present study proposes a selective substitute for use in the extraction of camellia saponins with composition analysis.
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JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Junjie Jiang,Yongqi Zhao,Xue Li,Xiaolong Liu,Tingyu Zhu
Nitrogen oxides (NO x ) and volatile organic compounds (VOCs) released from industrial sources react to generate pollutants such as O 3 through photochemical reactions. In order to realize the simultaneous removal of NO x and VOCs, this work provides a reaction site-isolation (RSI) catalyst with isolated reaction zones of toluene oxidation over Cu-Ce sites and NH 3 -SCR over V-W sites, respectively. Reaction site-isolation significantly weakens the impact of competitive adsorption between different reactants and reduces the formation of by-products during the reaction. The NO and toluene conversion both reached to 100 % at 275 ℃ and the catalyst demonstrated great sulfur resistance and stability. Characterization of the catalyst revealed that the interaction between Cu and Ce promoted the formation of oxygen vacancies, while the introduction of Cu increased the adsorption sites of toluene. Notably, DFT calculation and activation energy calculation reveal that the adsorption performance of active sites for reactant and the reaction activation energy required for reactions are different. Therefore, this work achieves adsorption and reaction co-induced bifunctional catalysis by isolating active sites.
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LWT-FOOD SCIENCE AND TECHNOLOGY
·
2025
·
IF 6.6
Zuguo Song,Siyu Yao,Chengchun Wu,Jianli Yang,Jinge Shi,Wen Cao,Guangle Pan,Chen Hu,Yanran Wang,Lijuan Chen
This study aimed to investigate the synergistic effect of photothermal films comprising carbon nanoparticles (CNPs) and cellulose nanocrystals (CNCs) in extending the shelf life of kiwifruit. Herein, a novel nanocomposite was synthesized via photothermal synergism by introducing CNPs into CNCs using ultrasonic assembly methods and the resulting composition was mixed with a polyvinyl alcohol (PVA) matrix to develop PVA based films. Results showed that the optimal ratio of CNPs to CNCs was 1:4 for the CNP/CNC composites. The CNPs/CNCs composites mainly bonded through hydrogen bonds and exhibited favorable thermal stability. The mechanical strength of the PVA based films added with 0.2% CNP/CNC composites improved by 79% compared with that of pure PVA films. Water vapor permeability of PVA-based films added with 0.2% CNP/CNC composites reduced by 8%, consistent with the water contact angle results. Notably, the addition of CNPs/CNCs composites to PVA films achieved superior photothermal effects, with the temperature increasing to 76.2°C during 1 min of irradiation, which is 48% higher than that of pure PVA films. Moreover, the addition of CNPs/CNCs composite to PVA films effectively reduced the weight loss and maintained the hardness, pH, and total soluble solid content of kiwifruit during storage. The addition of the CNPs/CNCs composite also delayed the decay time of kiwifruit by 3 days, presenting a novel approach for fruit preservation.
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FOOD CHEMISTRY
·
2024
·
IF 8.5
Huifang Wu,Qiqi Wang,Miaochen Dong,Xinyue Liu,Yanfeng Tang
Accurate and rapid monitoring of organophosphorus pesticides (OPs) residues is crucial for regulating food safety. Herein, dual-emission carbon dots (de-CDs) were fabricated for the ratiometric detection of OPs and Hg 2+ . The de-CDs exhibited two emission peaks at 678 and 485 nm when excited with visible light. Interestingly, the fluorescence at 678 nm was significantly quenched by Hg 2+ mainly because of the static quenching effect, whereas that at 485 nm exhibited a slight change. More significantly, the quenched fluorescence of the de-CDs recovered remarkably after introducing omethoate , diazinon and malathion . Accordingly, the ratiometric detection of the three OPs and Hg 2+ was achieved with high selectivity and robust performance. In addition, the OPs residues assay in Brassica chinensis was successfully performed with satisfactory results. This study not only provides an attractive tool for the simple and rapid assay of OPs but also offers new insights into the fabrication of multi-functional carbon dots .
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JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS
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2024
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IF 1.2
Xiaoli Ji,Zhihao Xu,Jian Liu,Ruochen Qiao,Haoze Yuan
MWCNT/Fe3O4/Si3N4 composite was synthesized via hydrothermal synthesis. The morphology and structure of MWCNT/Fe3O4/Si3N4 were investigated by means of SEM, XPS, XRD, and FT-IR. Their electromagnetic parameters were measured by a vector network analyzer. The microwave attenuation properties of as-synthesized composite could be modulated by regulating the feed ratio of MWCNT, Fe3O4, and Si3N4. According to the different amounts of modified nano Fe3O4 added, they are labelled as S1-S3. When the feed ratio is 3:15:20, the maximum reflection loss value of the sample is −23.3 dB at 14.4 GHz, the corresponding thickness is 2.5 mm, and the corresponding effective absorption bandwidth is 5.36 GHz. Moreover, the test results of the thermogravimetric analyzer show that the composite material has excellent heat resistance. Our research results provide a reference value for the development of excellent heat resistance and high-performance MWCNT-based microwave absorption composite materials.
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PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2024
·Vol. 221
·期 16
·2400121
·
IF 1.9
Xiaoli Ji,Ruochen Qiao,Zhihao Xu,Jian Liu,Haoze Yuan
Herein, multiwalled carbon nanotube (MWCNT)/silicon nitride (Si 3 N 4 )/polyaniline (PANI) ternary composites are prepared. The preparation method involves attaching carboxyl groups to acid-modified MWCNT surfaces and amino groups to Si 3 N 4 surfaces modified using a silane-coupling agent. Then they are combined to binary composites using the solvent-thermal method. Finally, the ternary composites are prepared by coating PANI on the surface of MWCNT/Si 3 N 4 composites in situ polymerization. The morphology and structure of these composites are characterized through X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. Results show that the reflection loss at 8.8 GHz reaches −42.57 dB when the feeding ratio of MWCNT:Si 3 N 4 :PANI is 3:20:40 and the corresponding effective absorption bandwidth reaches 4.06 GHz when the thickness is 3.5 mm. A conductive network with effective electron leaps is formed among MWCNT, Si 3 N 4 , and PANI, which increases the conductive loss of the composites. An abundant number of interfaces have formed in the composite materials and promoted dielectric loss. Multiple loss mechanisms and good impedance matching performance endow MWCNT/Si 3 N 4 /PANI with excellent microwave absorption performance, and the incorporation of Si 3 N 4 enables the composites to exhibit satisfactory high-temperature resistance. Thus, these performances render the composites promising materials to address increasing electromagnetic pollution, particularly at high temperatures.
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Heliyon
·
2024
·
IF 3.4
Yanbo Wang,Yana Zhao,Yurong Guo,Wanyu Han,Zhijun Zhang,Tianyu Hou,Huizhen Li,He Li,Qinqin Wang
Perilla frutescens L. essential oil (PLEO) has antibacterial and antioxidant properties, which can effectively maintain the quality of fruits and extend their shelf life. In this study, sodium alginate and chitosan were used as wall materials, and PLEO microcapsule powder was used as the core materials to prepare PLEO hydrogel beads. The best results were obtained by using 2%w/v sodium alginate and 1.5%w/v chitosan as wall materials, with a core-to-wall ratio of 2:1 and homogenized for 15 min producing PLEO hydrogel beads with encapsulation efficiency of 82.61 %. For strawberries preservation, PLEO hydrogel beads preservation group had a better effect after 5 d of storage, showing a lower decay rate (15.71 %), better maintaining the hardness of 1.75 kg/cm 2 , and a weight loss of 3.29 %. Furthermore, organic acids and total phenols were retained more in this group, the number of microorganisms was significantly reduced, and sensory qualities were improved, especially taste and color. This study provides important insights into the application of natural preservatives in the food industry and promotes sustainable practices in food preservation.
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LANGMUIR
·
2025
·
IF 3.9
Yunlei Cen,Yuanyuan Zhou,Mingshi Zhu,Ke Zheng,Shaoqi Zhou
In this work, Ti/TiO2-RNTs/SnO2–Sb–Ni-La electrodes were developed in three deposition stages. TiO2-RNTs improved the bonding of the bottom layer, and Ni–La codoping resulted in higher film stability. Compared with other electrodes, this electrode exhibits excellent performance with a denser structure, higher OEP (2.17 V), lower Rct (5.36 Ω), longer electrode strengthening life, and larger active specific surface area. The degradation of oily wastewater revealed an oil removal rate equal to 97.88% under optimal conditions. In comparison to the Ti/TiO2-RNTs/SnO2–Sb obtained via the one-step hydrothermal technique, the service life improved by 8.60 times, and the degradation rate (RD) of the current electrode (k = 0.0254 min–1) was enhanced by 2.67 times, whereas the removal rate remained stable after 10 cycles. Under the continuous attack of free radicals such as •OH, 48 types of organic matter in wash oil were decomposed, and most of the alkanes and polycyclic aromatic hydrocarbons were mineralized. Compared with direct current, pulse current electrolysis of the oil-washing wastewater can save 47.95% electrical energy, and the energy consumption of chemical oxygen demand removal per unit mass can be reduced by 72.02%. Therefore, the Ti/TiO2-RNTs/SnO2–Sb–Ni-La pulse electrochemical oxidation method is expected to reduce energy loss and improve the electrochemical treatment of oily wastewater.
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JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Wei Da,Chi Zhang,Ai-Yong Zhang,Xianhui Yan,Cheng Chen,Lyumeng Ye
Nano zerovalent iron (nZVI) has attracted great interest for the heterogeneous Fenton-like catalysis in environmental remediation due to its high capacity and low cost. However, toxicity and pollution risks arising from the rapid chemical corrosion in the oxygenated aqueous medium largely limit its more practical applications. In this study, the two-dimensionally defective MoS 2 was introduced as the key spatial protector to tailor the electron generation, transfer pathway and utilization efficiency of corrosive charge released from the chemical corrosion of nZVI in aqueous medium during reactions. We rationally designed and controllably prepared the nZVI@MoS 2 hybrid, in which MoS 2 spatially encapsulated nZVI to form the core-shell structure. Fenton-like catalysis on nZVI@MoS 2 produced reactive species to decompose refractory pollutants. Inner nZVI core transferred electrons to PMS through outer MoS 2 shell to activate PMS. Moreover, the MoS 2 shell promoted the Fe(II)/Fe(III) redox-cycling on nZVI and slowed down chemical corrosion of metallic core for superior and sustainable catalysis. Quenching and electron paramagnetic resonance tests indicated the involved hydroxyl radical, sulfate radical, superoxide radical and singlet oxygen with good reusability. Our work provided a new strategy to refine the environmental potential of nZVI benchmark with high industrial importance by two-dimensional transition metal sulfides for the superior environmental Fenton-like catalysis.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Haolong Tan,Tongwei Gao,Wensheng Yang,Yue Gao,Quan Xie,Yunjun Ruan,Qian Chen,Tinghong Gao
The rapid development of microelectronic devices has increased the demand for miniature energy storage systems that are highly safe and exhibit long cycling life and excellent energy density. However, the lack of low-cost and high-performance fabrication methods presents a significant challenge to thin-film electrode fabrication. This study reports a strategy combining controllable pre-curing treatment with rapid thermal annealing (RTA), which enables in situ fabrication of high-quality sodium vanadium phosphate [Na 3 V 2 (PO 4 ) 3 ] thin films. RTA facilitates the cleavage of weak metal–O bonds in the precursor film, whereas optimisation of the pre-curing duration (0–100 s) effectively eliminates organic residues and strengthens the carbon framework, suppressing particle agglomeration. This synergistic control substantially improves crystallization uniformity and film densification, resulting in a refined grain structure and highly oriented crystal facets. Under optimal conditions, the thin film demonstrates a high specific capacity of 85.6 mAh g −1 at a current density of 1 A g −1 , retains 72.5 mAh g −1 even at 20 A g −1 , and demonstrates 90.3 % capacity retention after 200 cycles. Moreover, the assembled full sodium-ion cell exhibits an average operating voltage of 1.3 V while maintaining 94.2 % capacity retention after 500 cycles. This study elucidates for the first time the synergistic regulation pathway of the pre-curing–RTA coupling mechanism in Na 3 V 2 (PO 4 ) 3 thin-film fabrication and proposes an advanced preparation strategy for cost-effective, highly integrated, high-power sodium-ion thin-film devices, providing critical theoretical foundations and robust technical support for next-generation all–solid state sodium microbattery design and development.
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