Sustainable Materials and Technologies
·
2025
·
IF 9.2
Xiongchao Liu,Xinyu Li,Na Gao,Zhiwei Liu,Yuangang Li,Mingli Wang,Tifeng Jiao
In recent years, nanomaterials have garnered significant attention from both academic and industrial sectors owing to their exceptional properties and diverse application potential. In this context, the Langmuir-Blodgett (LB) technique, as an efficient self-assembly method, has been widely used for the preparation of functional thin films. Based on this, in this work, thin films based on perylene diimide (PDI) and naphthalene diimide (NDI) derivatives composites with dyes were successfully prepared using the LB technique and tested for their performance in gas sensing and Surface-Enhanced Raman Scattering (SERS). The experimental results show that the composite films have excellent response in acid-base gas sensing, especially in the CR dye subphase, and the PDI/CR and NDI/CR composite films are sensitive to HCl and NH 3 gases, with the NDI/CR composite films showing the most sensitive performance. In addition, the PDI/RhB 40-layer composite membranes exhibited significant SERS of R6G molecules with an enhancement factor as high as 3.94 × 10 5 , which is superior to many similar materials. The results presented herein demonstrate the substantial potential of LB technology in the development of multifunctional thin-film devices and its application in gas sensing and SERS.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Jun Zhao,Yangfeng Du,Wanqin Cai,Pei Zhang,Xiling Song,Wenxuan Ye,Yunping Peng,Jianfu Zhao,Siming Yu
Nowadays, bacterial infection-associated diseases pose significant threats to human public health. Developing alternative strategies for the highly efficient treatment of bacterial infections is in urgent demand. It is well-known that hydroxyl radical (•OH) exhibits strong antibacterial activity and is widely used for chemodynamic therapy (CDT), while hydrogen sulfide (H2S) displays the ability to promote wound healing for gas therapy (GT). In the present work, a multifunctional nanozyme with pH and GSH dual-responsive sequentially releasing •OH and H2S properties was rationally designed for high-efficiency wound infection treatment via bimodal CDT and GT therapy. Herein, dendritic mesoporous organic silica (DMOS) nanoparticles were prepared and used as the carrier for in situ copper peroxide (CP) nanodots growth, obtaining nanozyme of DMOS@CP. In the acidic condition, CP decorated on DMOS was first decomposed by generating •OH via the Fenton-like reaction, which was able to effectively inhibit bacterial growth, as well as eradicate bacterial biofilms, by disrupting the bacterial cell membrane, increasing intracellular ROS generation, and damaging bacterial DNA. Subsequently, DMOS can be further dissociated by GSH to release a substantial amount of H2S to promote bacterial wound healing. The mechanism study revealed that H2S was capable of first reversing the inflammatory microenvironment of the wound by reprogramming M2-type macrophage polarization, followed by upregulating expressions of hypoxia-inducible factor-1α, vascular endothelial growth factor, and CD31 to promote cell migration and angiogenesis.
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Fermentation-Basel
·
2026
·Vol. 12
·期 2
·102
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IF 4.1
Xun Fu,Qingyu Nie,Xiang Li,Penghao Tan,Tingting Feng,Chunmei Xiong,Wenling Zhang,Yan Zhang,Sujin Li,Lixin Zhang
In recent years, there has been substantial global progress in screening yeasts for fermenting various specialty fruits, especially non-Saccharomyces species known for their contributions to aroma enhancement. This study focused on mature fruits and soil samples collected from orchards located in the main production region ofC. reticulatacv. ‘Dahongpao’ (CRCD) in China, with the objective of isolating specialized non-Saccharomycesyeasts suitable for producing CRCD fruit wine. After enrichment cultivation, seven characteristic yeast strains were isolated and purified. These isolates were identified asCandida parapsilosis,Meyerozyma caribbica,Candida quercitrusa, andMeyerozyma guilliermondiithrough a combination of microscopic morphology and molecular biology methods, which also includedPichia fermentans,Pichia kudriavzevii, andPichia kluyveri. The strains’ fermentation potential, ethanol production rates, and tolerance levels were assessed, leading to the selection ofCandida parapsilosis,Candida quercitrusa,Pichia fermentans,Pichia kudriavzevii, andPichia kluyverifor further fermentation experiments. The commercial yeast La-Ma was used as a control. Analysis of volatile organic compounds (VOCs) in the fruit wine samples was performed using Gas Chromatography–Ion Mobility Spectrometry (GC-IMS). A total of 42 different VOCs were identified, with esters being the most prevalent. The fingerprint profiles demonstrated notable differences between the fruit wine samples fermented with selected yeasts and those fermented with commercial yeasts. Principal component analysis (PCA) indicated thatPichia kluyveridisplayed the most significant divergence from both commercial and other selected yeasts. The samples contained notable VOCs such as 2-methyl-1-butanol, pentanal, 3-methyl-2-butenal, propyl acetate, butyl acetate, isobutyl acetate, isopentyl acetate, and 3-methyl-2-butenyl acetate, while the methanol production was observed to be lower compared to other samples. Consequently, this strain has the potential to produce distinctive fruit wine.
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MOLECULES
·
2026
·Vol. 31
·期 8
·1338
·
IF 5.1
Haibo Li,Hongxing Xu,Lei Yue,Yining Zhou,Yanhong Li,Kongjie Wang,Changzhou Tao,Boli Yang,Long Chai,Haihong Feng
In this paper, to remove the water lock effect in tight gas reservoirs, amphipathic polymer-modified titanium quantum dots (PTQs) were synthesized via in situ polymerization, showing a hyper-branched structure and an excellent synergistic effect with the nonionic fluorocarbon surfactant to break the water lock. The molecular structure, fluorescent property, and micromorphology of the PTQs were obtained. The surface activity and wettability alteration of rock are discussed. Results show that PTQs have zwitterionic hydrophilic groups and the hydrophobic structure of long-chain groups on their molecular structure. PTQ fluid, with a median particle size of 3.6 nm, showed strong green fluorescence and had excellent dispersibility in 50,000 mg/L of standard saline fluid at 120 °C. Additionally, the surface tension decreased to 18.6 mN/m at a PTQ concentration of 0.08%. At a 0.1% concentration, PTQ fluid altered the water wettability of tight sandstone to 67.2°, which resulted in lower capillary resistance. Furthermore, the surfactant (PHPE) had a good synergistic effect with the PTQs to decrease surface tension and alter the wettability of the sandstone surface, leading to lower surface tension and significant amphiphobicity. The strong surface activity of PTQs results from their specific molecular structure, which enables electrostatic attraction, quantum size effects, hydrogen bonding, and van der Waals forces between the inter-polar molecules of PTQs and the surface of sandstone to forcefully eliminate the water lock effect. This study offers key guidance for the development of a high-performance water-lock-breaking agent and application of titanium quantum dots in tight gas reservoirs.
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高影响因子
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
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2018
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IF 3.891
Rongwei Guo,Taotao Fu,Chunying Zhu,Yaran Yin,Youguang Ma
The gas-liquid two-phase flow distribution and mass transfer performance of CO 2 absorption into 2-amino-2-methyl-1-propanol (AMP) with ethylene glycol (EG) in two parallelized microchannels in a microfluidic loop were investigated. Four flow patterns were observed: filtering flow, repartition flow, breakup flow and irregular flow. The results showed that the uniformity of flow distribution is jointly affected by bubble length at T-junction and the hydrodynamic feedback of the downstream channels. Meanwhile, the uniform flow distribution facilitates the mass transfer performance. Furthermore, a prediction model of liquid side volumetric mass transfer coefficient under breakup flow in parallel microchannels was established by considering the relative error E r characterizing the flow maldistribution.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Rihong Xiao,Yili Zhang,Shuzhou Wei,Xing Chuai,Xiangzheng Cui,Zhuo Xiong,Junying Zhang,Yongchun Zhao
Massive Hg emissions from coal-fired units cause serious environmental pollution and result in a substantial waste of Hg resources. In this study, the prepared millimeter-grade Se/SiO 2 adsorbent was applied as a filler to adsorb mercury in a fixed-bed reactor to obtain the high value-added product HgSe, which solved the problem of short contact time and secondary pollution caused by the traditional injection mercury removal adsorbents. Experimental Hg removal showed that the 25 % Se-loaded adsorbent exhibited excellent Hg removal performance at 150 °C, with a saturation adsorption capacity of mercury was as high as 101.04 mg/g, nearly 300 times that of commercial activated carbons. Additionally, the influence of the flue gas composition on the Hg removal performance of Se/SiO 2 was studied. The results showed that O 2 , NO, and HCl increased the efficiency of Hg removal and SO 2 and SO 3 had trivial impact on the Hg removal performance. The Hg temperature-programmed desorption test results showed that the adsorbed Hg appeared predominantly as HgSe on the sample surface. DFT calculations verified that Se loading improved Hg removal performance and defined the adsorption mechanism. Moreover, the prepared Se/SiO 2 adsorbent carrier was soluble SiO 2 , which provided a good condition for the subsequent high-purity collection of HgSe. Finally, the technological process of Hg removal via Se-loaded adsorbents and the recovery of HgSe were proposed, which could offer a new way to achieve the resource utilization of Hg.
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GREEN CHEMISTRY
·
2022
·Vol. 25
·期 2
·596-605
·
IF 11.034
Haitao Yu,Yimin Xuan,Qibin Zhu,Sheng Chang
It is extraordinarily exigent to solve the efficiency of 6H+/6e− photoreduction of CO2 and H2O into methanol as the major product, which is limited by the severe photogenerated carrier recombination, the reoxidation of methanol at high temperature, and photocorrosion of catalysts. Herein, we developed an elaborate gas–liquid–solid system assembled by using a novel multicomponent SrTiO3 (La Cr)/Cu@Ni/SiO2/TiN (STO/Cu@Ni/SiO2/TiN) heterojunction, realizing a highly efficient and robust photocatalytic CO2 reduction to methanol at low temperature. STO/Cu@Ni/SiO2/TiN exhibits excellent light absorption and high charge carriers separation nature, and the evolution of methanol is 25.8 μmol (h gcat.)−1 roughly not only 173 folds higher than those observed compared with the STO counterpart, but also is 50 times that those of traditional gas–solid two-phase system. Of note, these improved performances are attributed to the enhancement of the local surface plasmonic resonance of Cu@Ni nanoparticles by changing the local medium dielectric constant and prolonged carrier's lifetime originating from heterostructure. Moreover, plasmonic TiN nanoparticles play an important role in remaining the triphase interfacial system temperature at 90 °C and increasing methanol production excellently. While, the ionic liquid in the gas–liquid–solid system can activate CO2 molecules, thereby greatly improves the yield of methanol. In situ Fourier transform infrared (FTIR) spectra and 13C isotope labeling tests reveal the reaction path of CO2 on the photocatalyst surface. This work may provide a new direction for the efficient photoreduction of CO2 to methanol.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2022
·
IF 11.357
Xiaoxiao Ding,Yatao Yang,Zequan Zeng,Zhanggen Huang
Dioxins in the sintering flue gas are usually removed through integrated elimination technologies by carbonaceous catalysts. However, the regeneration of the used catalyst is poorly investigated, leading to the risk of leakage of dioxins. Herein, the influences of cyclic regenerations on the dioxin removal performance of a catalyst (V2O5/AC) were investigated systematically with dibenzofuran (DBF) as a model pollutant. It was demonstrated that the adsorption capacity and oxidation activity of catalysts significantly declined after several regeneration cycles due to the decreasing external specific surface area and V5+, respectively. Compared with 79.12% DBF directly emitted from a regenerator during N2 regeneration, the emission of DBF was only 29.93% with the modification of the regeneration process through O2 addition and temperature adjustment. The possible regenerated products were also analyzed to disclose the transformation behaviors of DBF. The regeneration mechanisms of DBF followed the transformation pathway of dibenzofuranol, benzofuran, anhydride species, and ultimately to CO2 and H2O. Moreover, the accumulated heavy aromatics on the surface could be decomposed by introducing O2. This research provides a comprehensive understanding of dioxin transformation behavior and a theoretical basis for efficient control of dioxin removal in the whole integrated removal technologies.
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JOURNAL OF CHROMATOGRAPHY A
·
2022
·
IF 4.601
Jin-Hao Zhu,Qian Mao,Si-Yu Wang,Hui Liu,Shan-Shan Zhou,Wei Zhang,Ming Kong,He Zhu,Song-Lin Li
Short-chain fatty acids (SCFAs) play key roles in maintaining health and treating disease. Quantification of important fecal SCFAs is necessary to facilitate the clarification of their biological roles. However, the existing quantifying methods mainly depend on complicated precolumn derivatization, and/or are unable to determine formic acid, a SCFA commonly associated with toxicity. In this study, a direct gas chromatography-mass spectrometry (GC-MS) method for simultaneous quantification of ten SCFAs including formic acid in rat feces was developed. The approach was optimized in terms of chromatographic and spectrometric conditions as well as sample preparation. DB-FFAP capillary column with temperature programming was used to get baseline separation and symmetrical peak shape of SCFAs without precolumn derivatization in a relatively short running time (8 min). Multiple reaction monitoring (MRM) scan mode was employed to enhance the sensitivity and selectivity of SCFAs. Acidification with 50% HCl and immediate extraction with diethyl ether were utilized to achieve sample preparation of ten SCFAs from feces. Furthermore, the developed method was validated with wide linear range, high sensitivity and precision, low matrix effect and acceptable accuracy. The established method was successfully applied to compare the contents of fecal SCFAs between normal and immunosuppressed animal models.
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CHEMOSPHERE
·
2022
·
IF 8.943
Junxiong Zhao,Qifeng Wei,Dongkui Bi,Lijuan Liu,Shanshan Wang,Xiulian Ren
Marine engine exhaust emissions are increasingly harmful to the natural environment and human health and must be controlled. A self-synthesized amide (BAD, C 12 H 25 NO) in the laboratory shows a strong absorption capacity of nitric acid and nitrous acid , which may solve the problem that only using chlorine-based oxidant as an absorbent cannot completely absorb or retain NO 2 produced by NO oxidation in previous studies. Based on Multiwfn and VMD (Visual Molecular Dynamics) program calculation, the formation mechanism of hydrogen bonds between BAD with nitric acid and nitrous acid was revealed by electrostatic potential (ESP) analysis and further confirmed by FT-IR (Fourier transform infrared spectroscopy) spectra research. Subsequently, simultaneous removal of SO 2 and NO X from simulated flue gas was carried out by using NaClO/BAD as a two-phase composite absorbent, and the maximum removal efficiencies of SO 2 and NO X were 98.9% and 86.6%, respectively. The recycling experiments and the engineering experiments showing that NaClO/BAD can solve the problem of absorption of NO 2 , and it can be a promising composite absorbent in wet desulfurization and denitrification of marine engine exhaust gas in practical applications.
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JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Wenji Zheng,Dongyue Wang,Xuehua Ruan,Yan Dai,Xiaoming Yan,Xiujuan Zhang,Xiangcun Li,Xiaobin Jiang,Gaohong He
Reducing the effective pore size of MOFs is necessary to improve gas screening of mixed matrix membrane (MMMs). However, continuous and precise regulation on pore size of MOFs is still challenging. In this work, dopamine (DA) monomers are proposed to polymerize in situ into pore cages of UIO-66, achieving the tuning of effective pore size for CO 2 screening. Meanwhile, the abundant hydroxyl and amino groups in polydopamine (PDA) offer high affinity with CO 2 to improve the selective permeation of CO 2 . Furthermore, additional PDA existing outside UIO-66 at longer polymerization time can intensify the interface compatibility to promote CO 2 /N 2 selectivity. Through increasing PDA content in the cage by prolonging polymerization time, the effective pore size and total pore volume of UIO-66 are decreased by 13.2% and 59.2%, respectively, compared with pure UIO-66. Correspondingly, PDA@UIO-66/Pebax MMM presents greatly improved CO 2 separation performances, especially the CO 2 /N 2 selectivity, compared with UIO-66/Pebax MMM. Specifically, both the permeability and selectivity of CO 2 increase with the PDA content into the cages increasing, which is attributed to the synergy of reduced pore size and abundant CO 2 -philic groups in PDA. The PDA 10.3 @UIO-66/Pebax MMM shows the best CO 2 /N 2 selectivity of 70.55 and CO 2 permeability of 94.56 Barrer, 29.2% and 27.9% higher than those of UIO-66/Pebax MMM, respectively. The proposed PDA@UIO-66 based MMMs exhibit superior CO 2 separation performance, especially high CO 2 /N 2 selectivity compared with most reported UIO-66 based MMMs. Together with the good long-term stability, the proposed regulating strategy on effective pore engineering of MOFs is promising and competitive in CO 2 screening of MOFs based MMM.
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CIENCIA RURAL
·
2022
·
IF 0.901
Liu Zhenyi,Wang Jing,Yin Meijuan,Liu Mengsheng,Gao Weijuan
The Eucalyptus plant releases allelopathic chemicals into the environment mostly through the essential oils volatilized from the leaves. This study discussed the composition of the leaf oils of few seven-year-old varieties like Eucalyptus pellita (E. pel), Eucalyptus camaldulensis (E. cama), Eucalyptus grandis (E. gra), Eucalyptus dunni (E. dun), Eucalyptus saligna (E. sal), and E. grandis × E. urophylla (E. gra×E. uro) and three-year-old E. grandis × E. urophylla (E. gra × E. uro (three)). It determined the allelopathic mechanism and the types of chemical components playing the leading role. Essential oil was obtained by hydrodistillation and analyzed by the Gas Chromatography-Mass Spectrometry (GC-MS) method. In order to determine the effect of allelopathy, seed germination experiments were carried out at different concentrations (10-100 mL/L) of the E. Gra × E. uro leaf oil (EO) and the major components. The wheat seeds germinated by adding 1,8-cineole were used to determine the activity of α-amylase. Moreover, the mRNA expression of α-amylase in seeds was studied. The major chemical class in the essential oil was oxygenated monoterpene; 1,8-cineole (20.2-67.5%) displayed the highest content. Other substances that were high in content and ubiquitous included α-pinene (0.3-21.8%), α-terpineol (0.44-19.24%), and borneol (0.81-3.05%). The four chemical constituents and EO influenced the germination and growth of the three plants. Among them, 1,8-cineole exhibited the strongest inhibitory effect. The α-amylase activity of the 1,8-cineole-treated wheat seeds had decreased significantly. Molecular evidence suggested that 1,8-cineole decreased the α-amylase gene (AMY) expression.
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危险品化学品经营许可证（带存储）