CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Guancheng Liu,Zhe Zhang,Xin Long,Kai Zhang,Yunfeng Li,Bai Yang
The pore structure of cellulose microspheres is vital for their adsorption performance, however it is still challenge to control pore size and their distribution by a simple and cost-effective method. Here, through adjusting volume ratios of ethylene glycol diacetate to n-octanol in the cellulose solution, we prepare cellulose microspheres with adjustable pore size ranging from the micron- to nanometer scale in a straightforward and scalable method. We show that the average diameter of pores in cellulose microspheres is controlled from 4.58 μm to 108.43 nm with the median of pore diameter being from 1.63 μm to 7.69 nm. Cellulose microspheres exhibited good performance in both static and dynamic adsorption of methylene blue dye with a maximum capacity of 20.6 mg/g. A monolayer adsorption mechanism is revealed through fitting the Langmuir isotherm model. Interestingly, cellulose microspheres exhibit compressive strength comparable to that of adsorption resins, with maximum compressive stress ranging from 5.25 to 52.1 MPa, enabling them to pack in adsorption columns. Notably, a removal efficiency of 94.1 % was achieved by using column adsorption. Cellulose microspheres show adjustable pore size, good mechanical properties, and good adsorption performance, which will accelerate their practical applications in the environmental remediation.
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MOLECULES
·
2026
·Vol. 31
·期 7
·1163
·
IF 5.1
Meiqi Gao,Xinyan Hou,Hongmei Li,Yansen Han,Jianing Wang,Yanqiu Cao
Pharmaceuticals and personal care products (PPCPs), as persistent organic pollutants, are widely present in various aquatic environments. Their long-term presence in aquatic environments poses a potential threat to ecosystems and human health. This study established an efficient, green, and cost-effective photocatalytic method using P25 titanium dioxide (P25TiO2) to simultaneously degrade five representative PPCPs (methyl paraben (MeP), carbamazepine (CBZ), bisphenol A (BPA), diclofenac (DFC), and triclosan (TCS), while elucidating the reaction mechanisms. Under sunlight irradiation, degradation rates for all five PPCPs reached 100%, achieving near-complete mineralization with total organic carbon (TOC) removal rates exceeding 95%. This demonstrates the system’s exceptional capability to not only degrade the parent compounds but to thoroughly convert them into benign inorganic substances. We systematically investigated the effects of catalyst concentration, initial pollutant concentration, light intensity, pH, and various common inorganic anions (chloride, sulfate, bicarbonate, phosphate) and humic acid (HA) on the degradation process. Additionally, mechanistic studies indicated that hydroxyl radicals (·OH) are the primary active species in the system. The degradation rate differences among various persistent organic pollutants (DFC > BPA > TCS > CBZ > MeP) primarily stem from variations in the reactivity of different functional groups within their molecular structures toward ·OH. In summary, this study provides a promising and practical solution for treating complex medical wastewater containing five typical PPCPs.
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Yujiao Cheng,Leng Han,Linhua Huang,Xiang Tan,Houjiu Wu,Guijie Li
Thermal pasteurization decreases the sensory quality of mandarin juice. Flavor composition was determined in four fresh-squeezed and heat-processed mandarin juice varieties using molecular sensory science approaches. The relationships between odorants and sensory profiles were analyzed, and markers for flavor deterioration were screened by multivariate statistical analysis. Seventy-four volatiles were identified, among which 36 odorants with flavor dilution factors ranging from 2 to 128 were detected by multidimensional gas chromatography-mass spectrometry/olfactometry (MDGC-MS/O) coupled with aroma extract dilution analysis (AEDA). Higher intensities of cooked and off-flavor notes were observed in the heated mandarin juice, which was related to the concentration changes of the methional, methanethiol, dimethyl sulfide, and carbon disulfide by partial least squares (PLS) analysis. Ten potential markers (methional, methanethiol, dimethyl sulfide, hydrogen sulfide, β -damascenone, camphene, trans - β -ionone, decanal, d -limonene, and α -pinene) were responsible for the sensory discrimination of fresh-squeezed and heated mandarin juices.
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FLUID PHASE EQUILIBRIA
·
2023
·
IF 2.6
Yanqiong Bao,An Huang,Guangzhao Qin,Xiong Zheng
As isooctane and n-octanol are widely used in many industrial areas, the thermal conductivity data of these fluids is crucial in the energy conversion process. Therefore, obtaining reliable thermal conductivity data is of great significance for industrial applications. The thermal conductivity of isooctane and n-octanol was measured with a transient hot-wire device, which has a relatively expanded uncertainty of 2.0 % with a confidence level of 0.95 ( k =2). The measurement of these two fluids covers the temperature range from 303.15 to 523.15 K and the pressure range from 0.1 to 15 MPa. The experimental data were fitted into a polynomial with AADs and MDs of 0.35 % and 1.08% for isooctane, and 0.38 % and 0.99 % for n-octanol, respectively. This work is expected to supplement the data blank of the thermal conductivity of isooctane and n-octanol and promote their application.
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TEXTILE RESEARCH JOURNAL
·
2023
·
IF 2.3
Liujun Pei,He Zhu,Jingru Chen,Wenhua Shi,Jiping Wang,Omer Kamal Alebeid
In the nonaqueous medium dyeing system (decamethylcyclopenta siloxane; D5), the bonding between cotton fiber and reactive dye may be influenced by the dyeing medium. To evaluate the dyeing performance of reactive dye in the D5 dyeing system, the fixing of reactive dyes with different structures was studied. Before and after dyeing, the chemical environment of cotton fiber was investigated by X-ray electron spectroscopy, and compared with the spectroscopic method. Compared with traditional reactive dyeing, the color depth of the dyed cotton fabrics and the final fixation of dyes are much higher in the D5 dyeing system. The elements of the cellulose fiber surface are changed after dyeing. Especially for N element, its content is increased after dyeing. After 30 minutes, the final fixation of reactive dye is about 80% by analyzing the account of N. Compared with the undyed cellulose fiber, the peak area of C–C or C–H is gradually increased after dyeing, but the proportion of C–O is decreased with the fixing time. The proportion of O–C–O is not changed much with the fixation time. Therefore, the C–C or C–H chemical environment on the cellulose fiber surface will be changed after dyeing. Therefore, the bonding of dyes and fibers can be analyzed through the change of the C1s chemical environment or the amount of N element before and after dyeing. This investigation successfully developed a method which could evaluate the fixation process in the D5 dyeing system.
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TALANTA
·
2022
·
IF 6.556
Yaxing Ma,Yaoyu Luo,Xinrui Feng,Chuixiu Huang,Xiantao Shen
Outbreaks of emerging viral respiratory infectious diseases (VRIDs) including coronavirus disease 2019 (COVID-19) seriously endanger people's health. However, the traditional nucleic acid detection required professionals and larger instruments and antigen-antibody detection suffered a long window period of target generation. To facilitate the VRIDs detection in time for common populations, a smartphone-controlled biosensor, which integrated sample preparation (electromembrane extraction), biomarker detection (red-green-blue model) and remote response technology (a built-in APP), was developed in this work. With the intelligent biosensor, VRIDs could be recognized in the early stage by using endogenous hydrogen sulfide as the biomarker. Importantly, it only took 15 min to accomplish the whole process of screening and response to VRIDs. Moreover, the experimental data showed that this smartphone-controlled biosensor was suitable for ordinary residents and could successfully differentiate non-communicable respiratory diseases from VRIDs. To the best of our knowledge, this is the first time that a smartphone-controlled biosensor for screening and response to VRIDs was reported. We believe that the present biosensor will help ordinary residents jointly deal with the challenges brought by COVID-19 or other VRIDs in the future.
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CHEMISTRY-A EUROPEAN JOURNAL
·
2022
·Vol. 29
·期 13
·e202203097
·
IF 5.02
Ruixia Yang,Qiaohong Peng,Adeel Ahmed,Fengyuan Gao,Bing Yu,Youqing Shen,Hailin Cong
Graphical MB and PMS are absorbed by the Fe 3 O 4 /C shell and subsequently diffuse into the interior cavity of the yolk-shell Co 3 O 4 @Fe 3 O 4 /C nanocomposites. PMS enter the catalyst and interact with active sites on the shell and in the core. Co 2+ and Fe 2+ in the catalyst can activate PMS to generate SO 4 ⋅ − . Meanwhile, OH − /H 2 O will be oxidized by SO 4 ⋅ − to ⋅OH, generating H + while consuming OH − . SO 4 ⋅ − , ⋅OH and , resulting from a typical chain reaction, will interact with MB and breakdown it to intermediates CO 2 and H 2 O. The yolk-shell Co 3 O 4 @Fe 3 O 4 /C nanocomposites with Co 3 O 4 as the core, Fe 3 O 4 /C as the shell, and a cavity structure were synthesized by the hard template method. The physical and chemical properties of the composites were characterized by SEM, TEM, XRD, TGA, XPS, BET, and VSM. The specific surface area of yolk-shell Co 3 O 4 @Fe 3 O 4 /C nanocomposites is 175.9 m 2 g −1 , showing superparamagnetic properties. The yolk-shell Co 3 O 4 @Fe 3 O 4 /C nanocomposites were used as heterogeneous Fenton catalysts to activate peroxymonosulfate (PMS) to degrade MB, which showed high catalytic degradation performance. The degradation rate of MB reached 100 % within 30 min under the circumstances of the yolk-shell Co 3 O 4 @Fe 3 O 4 /C nanocomposites dosage of 0.1 g L −1 , the PMS dosage of 1.0 g L −1 , the initial MB concentration of 100 mg L −1 , an initial pH of 5.5, and a temperature of 30±2 °C. The enhanced catalytic performance of the yolk-shell Co 3 O 4 @Fe 3 O 4 /C nanocomposites can be attributed to the synergistic effect of the two catalytically active materials and the middle cavity. The effects of different operating parameters and co-existing anion species on MB degradation were also investigated. Electron paramagnetic resonance (EPR) analysis and quenching experiments confirmed that the formation of SO 4 ⋅ − in the yolk-shell Co 3 O 4 @Fe 3 O 4 /C/PMS system contributes to MB degradation. In addition, yolk-shell Co 3 O 4 @Fe 3 O 4 /C nanocomposites can be easily separated from the pollutant solution under the action of an external magnetic field, and the degradation rate of MB can still reach 98 % after five cycles, indicating that it has good stability and reusability and has broad application prospects in the field of water purification.
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Journal of Asian Ceramic Societies
·
2023
·
IF 2.3
Haidong Wu,Wei Liu,Yuerui Xu,Lifu Lin,Yehua Li,Shanghua Wu
Due to the processing of alumina ceramic cutting tools with complex shapes using traditional methods is difficult and time-consuming, vat-photopolymerization-based 3D printing was adopted to fabricate Al2O3 ceramic cutting tools with grooves for the first time. Subsequently, cutting performance evaluation and wear mechanism analysis were conducted. The relative density, Vickers hardness, and bending strength of the alumina cutting tools were determined. The effects of the cutting speed, feed rate, and cutting depth on the cutting performance and wear mechanism of the cutting tools were systematically investigated. In addition, two commercial cutting tools, namely cemented carbide and ceramic tools without grooves, were used for comparison. The cutting speed has the highest influence on the cutting performance, whereas the cutting depth has the least influence. The cutting performance of the prepared alumina cutting inserts with chip breaker grooves superior to that those without chip-breaking grooves and that of the cemented carbide tools. The wear mechanisms of the prepared alumina cutting tools and commercial tools were determined to be abrasive and adhesive wear, and those of the cemented carbide tools were adhesive wear and breakage. This work opens a new avenue for the future preparation of high-performance and complex-shaped ceramic cutting tools.
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JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Li Wang,Yi Zeng,Hongsheng Lu,Zhiyu Huang,Ya Liu
Organogelators and hydrogelators which belong to low-molecular-weight gelators (LMWGs) have attracted considerable attention due to various practical applications. Whether organogelators or hydrogelators, they can congeal single oil or water phase. However, gelators capable of gelation at oil/water interface have thus far remained unexplored. Herein, we report a class of surface-active ionic liquids (SAILs) based on dimethylcyclohexylamine and fatty acids. They can form high-strength gels at the oil/water interface instead of in single oil or water phase. These molecules spontaneously aggregate at oil/water interface, and then self-assemble into lamellar liquid crystalline structure, as evident from POM and SAXS analysis. Rheology analysis shows that these gels are of very high viscosity, strength and stability. These unique characters make these SAILs can effectively block the oil–water interface, which has potential application in oilfield development or oil leaks from underwater tubes.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Miao Ma,Jidong Wang,Xiaotong Yang,Yixin Qu
In this paper, the solubility of clotrimazole, an antifungal drug, in 10 alcohols (n-propanol, iso-propanol, n-butanol, iso-butanol, sec-butanol, n-pentanol, iso-pentanol, n-hexanol, n-heptanol, and n-octanol) and 6 esters (methyl acetate, ethyl acetate, n-propyl acetate, n-butyl acetate, isopropyl acetate, and methyl propionate) was experimentally determined using a laser dynamic solubility-monitoring device in a temperature range of 283.15 to 323.15 K at atmospheric pressure. The functions of solubility versus temperature were regressed using three semi-empirical models (modified Apelblat, three-parameter van’t Hoff, and λh) and two activity coefficient models (Wilson and NRTL). The results show that all the five models can be used to correlate the solubility of clotrimazole with temperature in these solvents satisfactorily. Furthermore, the thermodynamic mixing properties (ΔmixG, ΔmixH, ΔmixS, ln(γ1∞), and H1E, ∞) were evaluated using the measured solubility values and Wilson model parameters.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Chengcheng Ma,Wei Wang,Debao Kong,Wen Li,Shougang Chen
This work successfully synthesized the salicylic [email protected] ( [email protected] ) microcapsules with PUF microcapsules as shell material and SA as core material. The loading content of SA in the PUF microcapsules was approximately 40 %. The [email protected] microcapsules had excellent long-term antibacterial properties because the PUF microcapsules controlled the release of SA antifouling agents with the ability to induce reactive oxygen species generation and inactivate bacteria. The antibacterial efficiency of [email protected] microcapsules after 35 days against Staphylococcus aureus and Pseudomonas aeruginosa remained at 80 % and 81 %, increased by 60 % and 62 % compared with pure SA, respectively. The impedance modulus at 0.01 Hz of the [email protected] coating reached 5.51 GΩ cm 2 , much higher than blank coating (2.55 GΩ cm 2 ) and PUF coating (4.94 GΩ cm 2 ), indicating that the anti-corrosion property of the [email protected] coating was much better. This work would contribute to developing novel coatings with long-term antibacterial activity and excellent anti-corrosion performance.
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FOOD CHEMISTRY
·
2022
·
IF 9.231
Wenjuan Zhu,Pingning Jin,Hongrui Yang,Fei Li,Chen Wang,Tiemei Li,Jing Fan
Antioxidants, widely utilized in the food packaging field, have a risk of migrating into foodstuffs and eventually entering the human body. In this work, a novel method was established for green extraction and determination of antioxidants in food simulants migrated from plastic packaging materials. It was found that the antioxidants could be extracted directly from food simulants by in-situ formation of hydrophobic deep eutectic solvents with low toxic medium-chain fatty alcohols. Under the optimal conditions, the limit of detection was 0.15 to 0.25 µg/L, and the limit of quantification was 0.5 to 1.0 µg/L for the antioxidants. The extraction reaches equilibrium in 2 min. Importantly, butylated hydroxytoluene was detected in two types of the surveyed food contact materials. The established method shows high sensitivity, high enrichment factor, and strong anti-interference ability, and can be used for the separation and enrichment of ultra-trace antioxidants in foodstuffs.
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