Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Xi Wang,Shixiang Fan,Shichang Chen
The contamination of heavy metal ions in water resources poses a threat to both human health and the environment. Fluorescent sensing technologies based on rare earth elements can be widely applied for the accurate detection and quantitative analysis of metal ions. A fluorescent nanofiber membrane material with sensitivity to copper ions was developed. The Eu(TTA) 3 ·2H 2 O complex was formed through a complexation reaction between europium (Eu) and 2-thenoyltrifluoroacetone (TTA). This complex was then co-spuned with a solution of PEG-modified PET (GPET) using the centrifugal electrostatic spinning method to create a fluorescent PET fiber membrane (GPET@Eu-NFM). Results show that the fluorescence intensity of GPET@Eu-NFM is enhanced compared to the Eu(TTA) 3 ·2H 2 O complex. As the concentration of the copper ion solution increases, the fluorescence intensity of the film presents a linear decreasing trend, and it also has a linear relationship with pH. This indicates that the fluorescent polyester fiber membrane exhibits dual responsiveness to copper ions and pH. An effective, quick, and convenient method for the monitoring and analysis of copper ions can be proposed by utilizing the fluorescence quenching phenomenon observed when the super hydrophilic surface of functionalized GPET@Eu-NFM comes into contact with copper ions.
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Journal of Food Measurement and Characterization
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2024
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IF 2.9
Wang Jiaming,Liang Bin,Li Zhentao,Wu Xinru,Wang Zifei,Yu Te,Gao Yang,Dai Yonggang,Wu Qiong
Physalis alkekengi L. is one of the most popular berries in the world, and its calyx is rich in nutrients. Still, the study of soluble dietary fiber (SDF) from Physalis alkekengi L. calyx (PC) has not been reported. This study aimed to extract Physalis alkekengi L. calyx soluble dietary fiber (PCSDF), and the optimal extraction process was investigated using response surface methodology. After ultrasonic pretreatment, the yield of PCSDF reached 8.74 ± 0.17% under the conditions of liquid-solid ratio of 30 mL/g, thermostable α-amylase concentration of 2000 U/mL, dispase concentration of 20,000 U/mL, amyloglucosidase concentration of 40,000 U/mL. For the first time, PCSDF was characterized by UV spectroscopy, infrared spectroscopy, scanning electron microscopy and thermogravimetric analysis, and the composition of the monosaccharides, namely mannose, glucuronic acid, rhamnose, galacturonic acid, glucose, galactose, xylose, arabinose and fucose, was identified by HPLC. For antioxidant activity, the half inhibitory concentration (IC 50 ) against DPPH, ABTS + , ·OH, and ·O 2 − radicals were 3.67, 2.96, 5.45, and 2.90 mg/mL, respectively, and there was a specific Fe 3+ reducing capacity. In terms of hypoglycemic feature, the IC 50 values for the inhibitory ability of α-glucosidase and α-amylase were 1.20 and 9.21 mg/mL, respectively. For lipid-lowering potential, the IC 50 value for pancreatic lipase inhibitory ability for lipid-lowering was 16.95 mg/mL. This paper fills the research gap of PCSDF and provides a basis for further evaluation of PCSDF using in vivo studies. Graphical Abstract
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CARBON
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2024
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IF 10.5
Jiamei Liu,Beibei Chen,Penglei Guo,Zeqi Yu,Weichen Sheng,Kan Zhang,Xiaoqing Liu
Micro- and nano-scale carbon materials have been extensively investigated as additives in lubricants owing to their remarkable capability for friction reduction and enhancement of thermal conductivity within lubrication systems. Nevertheless, it is still highly desirable for oil-based lubricants to involve well-dispersed ultrafine carbonaceous particles without complicated chemical modification. Herein, we present a strategy to achieve 3D graphene additive in lubricants based on rapid laser irradiation. Notably, PAO4 containing 3D laser-induced graphene (LIG) additive exhibits excellent tribological properties in comparison with many other unmodified carbonaceous materials, including graphene, graphene oxide, single-wall nanotubes, and carbon black. In addition, the lubrication properties of PAO4 can be significantly improved by manipulating the concentration of the 3D LIG additive. With the addition of only 0.1 wt% 3D LIG-10, PAO4 lubricant system shows a reduction of 22% in coefficient of friction (COF) and a reduction of 95% in terms of wear coefficient compared to the base oil. In this work we provided a new strategy to produce 3D graphene oil additives for excellent tribological and wear performance.
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Journal of Water Process Engineering
·
2025
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IF 6.7
Xuanying Cai,Tiansheng Chen,Zhenhua Dai,Peiren Ding,Yinhao Dai,Peng Fan,Jihong Xu,Yuankui Sun,Xiaohong Guan
In cold regions, the freezing process typically presents difficulties for the remediation of contaminated soil and groundwater. However, in this work we report a freeze-assisted activation of peroxydisulphate (PDS) by β -MnO 2 for the degradation of phenolic compounds. The results showed that 60.8 % of 2,4-dichlorophenol (2,4-DCP) could be abated in frozen solutions at an initial pH of 6.5 within 2 h, whereas only 12.4 % of 2,4-DCP disappeared in aqueous solutions under other identical conditions. This enhancing effect was highly associated with the well-known freeze concentration effect, which could decrease the solution pH at the ice grain boundary by 2.4 units. Electron spin resonance (ESR) spectroscopic analysis and experiments with quenching agents and D 2 O suggested that radicals and singlet oxygen were not the major reactive species involved in the β -MnO 2 /PDS system. Instead, Raman analysis indicated that PDS may be bound to the surface of β -MnO 2 to form a reactive inner-sphere complex of MnO 2 -PDS*, which is proposed to account for the oxidative degradation of 2,4-DCP in aqueous and frozen β -MnO 2 /PDS systems. Chronoamperometric experiments further showed the redox potential of the β -MnO 2 /PDS system was as high as 1.2 V. This work highlights the possibility of applying the freezing effect to accelerate PDS activation by minerals abundant in environment and thus offers a promising strategy for pollution remediation in cold regions.
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RSC Advances
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2024
·Vol. 14
·期 17
·12218-12224
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IF 3.9
Duanyang Wu,Junxue Li,Jing Xu,Wei Cheng
Freezing has been reported to accelerate chemical reactions and thus affect the fate of pollutants in the environment. However, little research has been conducted on the potential effects of freezing on the chlorination process. This study aimed to explore the freezing-enhanced chlorination process by comparing the oxidation of clofibric acid (CA) by chlorine in ice (at −20 °C) to the same reaction in water (at 25 °C). The degradation of CA, which was negligible in water, was significantly accelerated in ice. This acceleration can be attributed to the freeze concentration effect that occurs during freezing, which excludes solutes such as chlorine, CA and protons from the ice crystals, leading to their accumulated concentration in the liquid brine. The increased concentration of chlorine and protons in the liquid brine leads to higher rates of CA oxidation, supporting the freeze concentration effect as the underlying cause for the accelerated chlorination of CA in ice. Moreover, the chlorine/freezing system was also effective in the degradation of other organic pollutants. This highlights the environmental relevance and significance of freezing-enhanced chlorination in cold regions, particularly for the treatment of organic contaminants.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Ang Li,Bin Li,Li-Ming Sun,Le-Xuan Liu,Chang Liu,Ya-Meng Dong,Xing Zhang
Advanced oxidation processes involving high-valent metal-oxo species have garnered increasing attention for their effective pollutant degradation in water. However, less is known about the mechanism of the species in the manganese oxides (MnO x ) system. Therefore, it is crucial to design MnO x catalysts to systematically clarify the high-valent metal-oxo species reaction mechanism. In this study, MnO x nanoplates including Mn 3 O 4 , Mn 5 O 8 , and Mn 2 O 3 were synthesized via a facile thermal treatment of a Mn(OH) 2 precursor to activate peroxymonosulfate (PMS) for mechanism studies. The Mn 3 O 4 catalyst exhibited superior catalytic performance and reusability owing to its unique spinel structure and rapid electron transfer properties. The first-order rate constant for Mn 3 O 4 is 0.64 min −1 , which is 3.7 and 1.5 times higher than those of Mn 5 O 8 and Mn 2 O 3 , respectively. Scavenging experiments, electron paramagnetic resonance, and electrochemical analysis revealed that free radicals played a negligible role, while the formation of high-valent Mn-oxo species was promoted, facilitated by the Mn 3 O 4 -PMS* complex. These high-valent Mn-oxo species were highly reactive towards various pollutants. Moreover, the degradation intermediates of bisphenol A (BPA) in the Mn 3 O 4 /PMS system were identified, further elucidating the interactions between high-valent Mn-oxo species and BPA. Additionally, the Mn 3 O 4 catalyst exhibited excellent catalytic performance under practical conditions and maintained superior stability over six cycles. This work provides crucial insights into the role of transition metal oxides in activating PMS for the catalytic degradation of emerging pollutants.
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Materials Today Energy
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2024
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IF 9
Jizong Song,Weijie Ren,Wenjia Wang,Jie Wu,Qing Chang,Chaorui Xue,Jinlong Yang,Shengliang Hu
Solar-driven catalytic synthesis of H 2 O 2 is an ideal alternative to the anthraquinone method, but current photocatalysts still suffer from low activity and inefficient solar energy utilization. Here we presented an economic and efficient solar interfacial catalysis system (SICS) that incorporated photothermal–photocatalytic materials into commercial sponge to simultaneously generate the required heat and carriers for H 2 O 2 production. We demonstrated its superiority over conventional particulate photocatalysis (PC) in photocatalytic H 2 O 2 production. The SICS, located at the air–water interface, remarkably improves the activities of photocatalysts by efficient utilization of solar-converted heat. The produced H 2 O 2 from SICS was reserved in the sponge and resulted in an ultrahigh concentration of 46 mM for per gram catalyst after 1 h solar irradiation. As thus, our application experiments confirmed that the SICS presented great advantages in organic pollutant (e.g. phenol and tetracycline) degradation compared with conventional PC. This work paves a new way for the industrialization of solar-driven catalysis.
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Materials Today Communications
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2025
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IF 4.5
Zhi Qi,Chunlai Liu,Peihang Shen,Zelong Liu,De Sun,Jianglei Hu,Yibo Zhang
With the accelerated consumption of fossil fuels driven by societal development and population growth, acid-catalyzed biodiesel serves as an eco-friendly alternative that effectively enhances reaction processes and reduces pollutant emissions. This study developed a novel dual-acid catalyst, H 3 PW 12 O 40 (PW) and titanium-incorporated phenolic resin (PR) functionalized mesoporous silica (PW/Ti-SiO 2 -PR), via a one-pot hydrothermal method for efficient biodiesel production via oleic acid esterification. The composite’s structure, acidity, and hydrophobicity were systematically characterized using FT-IR, XRD, N 2 physisorption, SEM/TEM, and XPS. Results confirmed the successful integration of PW and Ti into the silica framework, creating synergistic Brønsted (PW) and Lewis (Ti 4 + ) acid sites. The inclusion of low-molecular-weight PR enhanced mesopore formation and hydrophobicity, critical for inhibiting water-induced deactivation. The optimized 0.2PW/Ti0.05-SiO 2 -PR0.25 catalyst achieved 95.2 % methyl oleate yield at 100 °C within 8 h, outperforming conventional solid acids. Notably, the catalyst retained > 90 % activity over five cycles without PW leaching or structural degradation, demonstrating exceptional stability. This work highlights the strategic design of hydrophobic, dual-acid mesoporous catalysts for sustainable biodiesel synthesis.
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MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Jianbin Ju,Yuji Ruan,Huifeng Deng,Xiaowen Huang,Guihua Ruan,Yipeng Huang
In this work, thiocyano-functionalized monodisperse dendritic mesoporous silica microspheres (DMS-SCN) were successfully synthesized and utilized as efficient solid-phase extraction adsorbents for the enrichment of eugenol anesthetics in aquatic products. The thiocyano functionalization significantly improves the adsorption capacity of the adsorbent for the four eugenol anesthetics from 723–1092 μg g −1 to 2180–3885 μg g −1 in virtue of the reinforced permanent dipole interactions, π-π stacking interactions, and electrostatic interactions. By coupling DMS-SCN based solid phase extraction with HPLC (SPE-HPLC) method, an analytical method for determination of eugenol anesthetics in tilapia, carp and shrimp was successfully developed. This method achieves low detection limits ranging from 0.32 ng mL −1 to 0.82 ng mL −1 and exhibits a wide linear range from 1 ng mL −1 to 200ng mL −1 . The recoveries for the four eugenol anesthetics range from 85.16 % to 109.1 %, with relative standard deviations between 1.18 % and 8.37 %. The method demonstrates minimal matrix effects and high accuracy. The DMS-SCN based SPE-HPLC method is anticipated to be a valuable tool for the analysis of eugenol anesthetics in complex sample matrices.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
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IF 21.1
Haoran Yu,Longgang Chu,Cheng Gu,Mingyang Xing
In this study, we present an effective modification strategy for cobalt ferrate (CoFe₂O₄), a cost-effective heterogeneous Fenton catalyst. Electron microscopic observation and X-ray diffraction results confirmed the successful hydrothermal synthesis of F-CoFe₂O₄/MoS₂. Notably, F-CoFe₂O₄/MoS₂ exhibited a high pollutant degradation efficiency (over 90 % within 30 min) across a broad pH range (4.0–9.0), along with excellent cyclic stability (up to 10 cycles) and environmental robustness. The effectiveness of the catalyst in treating real water samples and its performance in continuous-flow operations were also demonstrated. Fluorine (F) doping and integration with molybdenum sulfide (MoS₂) as a co-catalyst significantly facilitated metal ion release and promoted the formation of an acidic microenvironment on the catalyst surface, which accelerated Fe³ ⁺/Fe²⁺ cycling and enhanced CoFe₂O₄ performance in H₂O₂ activation and pollutant degradation. This work provides valuable insights for designing more efficient catalysts for heterogeneous Fenton oxidation systems in water treatment applications.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Wei Chen,Xinxin Liao,Feng Chen,Xiang Xia,Ping Tong,Yanqiao Jin,Lei Xiong
Considering the facts of fossil fuel depletion and environmental issues, the conversion of biomass into high value-added chemicals is of great importance. In this work, Ni and Co were encapsulated in lignin-derived phenolic resin spheres to obtain NiCo@LRS, which was then employed as a sacrificial template for the synthesis of the bimetallic catalyst NiCo@LC-RS. The Ni and Co act as the acid and dehydrogenation sites for the catalytic transfer hydrogenolysis of 2-phenoxy-1-phenylethanol ( pp-ol ) and corncob lignin, respectively, and exhibit a synergistic enhancement effect. Under the optimal conditions of 170 °C, 1 MPa N 2 and 4 h, the conversion of pp-ol reached 99.9 %, with the yields of cyclohexanol and ethylbenzene at 99.9 % and 93.8 %, respectively. The lignin was completely converted and the selectivity of monophenols was 55.74 %. The catalyst remained stable and reusable after 5 cycles. Furthermore, lignin oil can be employed in the preparation of Ni Co bimetallic catalysts, which have been demonstrated to exhibit excellent catalytic properties. This work provides practical guidance for the high-value utilisation of lignin.
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JOURNAL OF HAZARDOUS MATERIALS
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2025
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IF 11.3
Qian Guo,Zuxin Xu,Wenhai Chu,Yingying Zhou,Xiaoting Gao,Cheng Ye
Sewer overflows are a potential source of emerging contaminants to urban waters, posing a threat to ecosystems and human health. Herein, the performance and mechanism of ferrate(Ⅵ) (Fe(Ⅵ))/peroxymonosulfate (PMS), Fe(Ⅵ)/peroxydisulfate (PDS), and Fe(Ⅵ)/percarbonate (SPC) for the degradation of ofloxacin (OFL) in overflows were comparatively investigated. These systems achieved efficient degradation of OFL and the removal of conventional pollutants. Particularly, Fe(Ⅵ)/PMS showed better degradation performance for OFL with a degradation efficiency of 98.8 %. The dominant reactive oxygen species for OFL degradation in the Fe(Ⅵ)/PMS, Fe(Ⅵ)/PDS, Fe(Ⅵ)/SPC systems were singlet oxygen ( 1 O 2 ), sulfate radical (SO 4 · - ), and hydroxyl radical (·OH), respectively. High-valent iron species played an important role in the Fe(Ⅵ)/PMS and Fe(Ⅵ)/PDS systems. Notably, the synergistic effect of oxidation and in-situ coagulation played a key role in OFL degradation, which determined the superior performance of Fe(Ⅵ)/PMS. The formed flocs with Fe-O-P bond acted as a highway to promote the electron transfer from OFL to PMS, resulting in the efficient degradation of OFL in Fe(Ⅵ)/PMS system. Moreover, a same degradation pathway of OFL was found, and the toxicity of the degradation products was reduced, especially in the Fe(Ⅵ)/PMS system. This study provided a new strategy for overflows treatment.
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