COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Yang Gao,Xian Du,Zhuo Li,Lihan Wang,Bo Tian,Ruixue Tian,Huiling Du
With the development of industry, large quantities of volatile organic compounds (VOCs) not only cause damage to the ecological environment, but also pose a serious threat to human health. At present, most photocatalysts used for benzene treatment still suffer from problems such as narrow light absorption range, high electron-hole recombination rate, and low charge transfer efficiency. Therefore, the development of high-performance photocatalysts is extremely urgent. The introduction of oxygen vacancies and the construction of heterojunctions can effectively solve the above problems. In this study, a defect-rich photocatalyst was combined with a topology-structured metal-organic framework (MOF) to construct a tightly coupled heterojunction, aiming to address these issues and improve the photocatalytic degradation performance of benzene. By introducing oxygen vacancy-rich TiO₂ nanosheets into NH₂-MIL-125, a tightly coupled Z-scheme heterojunction composite photocatalyst is fabricated. The benzene degradation efficiency of the composite reaches up to 98.5%, which is 1.47 times and 1.27 times that of pure NH₂-MIL-125 and oxygen vacancy-rich TiO₂, respectively, while also exhibiting remarkable stability and high adsorption capacity. Oxygen vacancies act as active sites that strengthen the interfacial electronic interaction of the composite, thereby optimizing the electron transport pathway of the heterojunction and improving the carrier separation efficiency. Under the dual modulation of the heterojunction and oxygen vacancies, the built-in electric field is further intensified, leading to a significant enhancement in the adsorption and catalytic performance of the composite. This study provides an effective design strategy for utilizing oxygen vacancy-driven heterojunctions in catalysts for the efficient abatement of VOCs.
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高影响因子
Journal of Physical Chemistry C
·
2019
·
IF 4.309
Zepeng Rao,Xiaofeng Xie,Xiao Wang,Asad Mahmood,Shengrui Tong,Maofa Ge,Jing Sun
A series of Er-doped TiO2 photocatalysts, using Er(NO3)3·6H2O precursor ranging from 0.5 to 2 mol %, were synthesized via sol–gel method with titanium(IV) isopropoxide solution as reactant. The structure and properties of as-prepared samples were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, UV–vis spectroscopy, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy, thermogravimetric analysis, photoluminescence, electrochemical impedance spectroscopy, and photocurrent. The as-synthesized Er-doped TiO2 nanoparticles demonstrated improved photocatalytic activities for the photodegradation of selected volatile organic compounds, including acetaldehyde, o-xylene, and ethylene. Additionally, high photodegradation of acetaldehyde was recorded in the visible region (λ > 420 nm). XPS analysis revealed that a handful of Er in anatase TiO2 was presented in the form of Er2O3, which benefited by increasing the specific surface area ranging from 59.28 to 110.34 m2/g and consequently enhanced the adsorption capacity for acetaldehyde, o-xylene, and ethylene 3.3, 3.7, and 3.8 times, respectively, in contrast to the undoped TiO2. Electron spin resonance results showed that Er doping caused production of oxygen vacancies (VO) and Ti3+, which promoted the photocatalytic activity of the catalyst. The TiO2 samples containing 0.5–1.5% Er content exhibited higher photoactivity in comparison with other samples. The highest removal efficiency of acetaldehyde and o-xylene within 100 min was 99.2 and 84.6%, respectively, and ethylene degradation efficiency reached 22.4% within 180 min. Furthermore, the visible light elimination efficiency of acetaldehyde was 25.5%. Finally, the results suggested that Er doping predominantly inhibited the catalyst poisoning in the degradation of o-xylene.
研究领域:
材料科学
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环境科学
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
·
IF 10.53
Yunjia Wang,Yanning Su,Lijuan Yang,Min Su,Ye Niu,Yin Liu,Hanxue Sun,Zhaoqi Zhu,Weidong Liang,An Li
Efficient removal of pollutants in the atmosphere is of great significance to human health and environmental restoration. Herein, we report the preparation of a self-supporting conjugated microporous polymers (CMPs) membrane (SS-CMPs-M) synthesized by Sonogashira-Hagihara (S–H) cross-coupling reaction using KBr tables as a template. The intrinsic hydrophobic chemical composition made it good hydrophobicity and lipophilicity, e.g., the water contact angles (WCA) for SS-CMPs-M were measured to be 113°. The aromatic building blocks of CMPs make SS-CMPs-M exceptionally stable physicochemical properties, i.e., the membrane exists stably below 300 °C, and they were insoluble in organic solvents . Additionally, the as-resulted SS-CMPs-M-1 which also presents mesoporous architecture shows effectively captures performance for particulate matter (PM) with different particle sizes in the air, the removal efficiency of PM 2.5 and PM 10 are 99.7% and 99.9%, respectively. For volatile organic compounds (VOCs) vapor in the air, the SS-CMPs-M-1 shows an excellent purification effect, the removal efficiency of formaldehyde in the simulated air is above 97%, and the AQI value of the filtered gas (>500) is reduced to 50. Taking advantage of its simple and scalable manufacture, the SS-CMPs-M-1 may have great potential as an advanced membrane for the separation and elimination of PM in different environments.
研究领域:
环境科学
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材料科学
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高影响因子
Food Chemistry-X
·
2023
·
IF 6.1
Che Shen,Yun Cai,Meiqi Ding,Xinnan Wu,Guanhua Cai,Bo Wang,Shengmei Gai,Dengyong Liu
A comparison was made between the traditional charcoal-grilled lamb shashliks (T) and four new methods, namely electric oven heating (D), electric grill heating (L), microwave heating (W), and air fryer treatment (K). Using E-nose, E-tongue, quantitative descriptive analysis (QDA), and HS-GC-IMS and HS-SPME-GC–MS, lamb shashliks prepared using various roasting methods were characterized. Results showed that QDA, E-nose, and E-tongue could differentiate lamb shashliks with different roasting methods. A total of 43 and 79 volatile organic compounds (VOCs) were identified by HS-GC-IMS and HS-SPME-GC–MS, respectively. Unsaturated aldehydes, ketones, and esters were more prevalent in samples treated with the K and L method. As a comparison to the RF, SVM, 5-layer DNN and XGBoost models, the CNN-SVM model performed best in predicting the VOC content of lamb shashliks (accuracy rate all over 0.95) and identifying various roasting methods (accuracy rate all over 0.92).
研究领域:
食品科学
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化学计量学
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人工智能
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PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2023
·Vol. 30
·期 39
·91262-91275
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IF 5.8
Cheng Tangying,Li Jinjin,Ma Xiuwei,Yang Linjun,Zhou Lei,Wu Hao
Various materials have been developed to capture volatile organic compounds (VOCs) to mitigate air pollution. However, sorbent materials with excellent resistance to water are rare. Here, several Fe/N-doped activated carbons (ACs) have been prepared to capture VOCs in humid environments. The ACs were analyzed by various characterization techniques, such as BET, SEM, XPS, XRD, FTIR, and Raman. The results showed that Fe/N doping resulted in the specific surface area of the ACs increasing by 500 to 1000 m 2 g −1 , the average pore size increasing to approximately 2 nm, improved mesoporous structure, higher graphitization, lower hydrophilicity, and polarity. The VOCs adsorption performance of the ACs was evaluated by static and dynamic adsorption experiments. The uptake of toluene and ethyl acetate by ACs was enhanced to 224 mg g −1 and 135 mg g −1 , respectively. And ACs were able to maintain 70 to 80% VOCs adsorption capacity for VOCs at 80% relative humidity. Furthermore, the microscopic mechanisms were investigated by the grand canonical Monte Carlo method (GCMC). The highly graphitized structure and the N functional groups favored the VOC adsorption process and discouraged the adsorption of water vapor. This work affirmed the dominance of Fe/N-doped carbon, which will contribute to the evolution of water-resistant VOCs adsorbent materials. Graphical Abstract
研究领域:
环境科学
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材料科学
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PubMed
高影响因子
FUEL
·
2024
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IF 6.7
Yangfei Fang,Kaijie Liu,Xin Shen,Daying Zheng,Xiaohui Chen,Bin Hu,Huaiyuan Wang,Mengyao Bian,Liwei Sun,Haijiao Xie,Yibo Zhang,Xiangguang Yang
Developing highly active catalysts for hydrocarbon combustion at low temperatures is paramount but yet challenging. The crystal form of carrier and the dispersion degree of active species have great influence on propane combustion catalysts, but its internal mechanism is still unclear. In this study, the amorphous atomic-layer Pt clusters (AL) and Pt single atoms (SA) on TiO 2 with various crystal phases were prepared and used as propane combustion catalysts, where the as-synthesized Pt/a-TiO 2 catalyst with atomic-layer Pt clusters exhibited better catalytic performance. The Pt/a-TiO 2 -AL could achieve a 90 % propane conversion (T 90 ) at 230 °C, with the highest reaction rate (39.57 × 10 −7 mol g −1 s −1 ) and TOF value (7.72 × 10 −2 s −1 ) at 240 °C. Kinetic studies showed that oxygen had a lower inhibitory effect on Pt/a-TiO 2 -AL compared to that on the Pt/p-TiO 2 -AL and Pt/r-TiO 2 -AL catalysts; simultaneously, the Pt/a-TiO 2 -AL catalyst presented lower apparent activation energy compared with Pt/a-TiO 2 -SA. DFT results showed that atomic-layer Pt clusters on TiO 2 had the lower formation energy of oxygen vacancy than Pt single atoms due to the synergistic effect between adjacent exposed Pt atoms in the fully exposed atomic-layer Pt clusters, which had a higher activation capacity for oxygen and thus accelerated propane combustion through the ignition effect (rapid activation of oxygen and rapid combustion of propane). Our primary results provide a promising approach for the creation of high-efficiency Pt-based catalysts, specifically tailored for the catalytic combustion of volatile organic compounds (VOCs).
研究领域:
催化
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化学工程
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材料科学
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环境科学
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高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
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2023
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IF 6
Li Wan,Hong Wang,Xinyuan Mo,Yueping Wang,Lianping Song,Liangyan Liu,Wenjuan Liang
Primary processing treatments are crucial to the flavor profile of coffee beans, which create the flavor precursors basis in coffee husks and diffuse into the beans, with satisfying outcomes. In this study, eleven coffee husks of Coffea arabica with different primary processing treatments (sun exposure, washing and honey treatment) from three latitudes of Yunnan were investigated by the combination of HS-SPME-GC-MS and PTR-TOF-MS. A total of 114 volatile organic compounds (VOCs) and 77 masses were identified. The characteristic compounds octanoic acid ( S1 ) and methyl linoleate ( S11 ) in sun-exposed, phenethyl alcohol ( F4 ), methyl salicylate ( F7 ), 3,5-dimethylbenzaldehyde ( F9 ) and phytone ( T9 ) in washed and n -hexadecanoic acid ( S9 ) of honey-treated husks were recognized by the ions at m/z 33.032, m/z 68.049, m/z 83.049, m/z 67.054, m/z 57.034, m/z 41.030 and m/z 49.010, respectively. This study demonstrated the feasibility and complementarity of HS-SPME-GC-MS and PTR-TOF-MS in the rapid identification of VOCs in coffee husks. Meanwhile, the antioxidant capacities of the 11 husks were evaluated in vitro , and the sun-exposed samples exhibited most promising potency, in which methyl salicylate ( F7 ), methyl linoleate ( S11 ), methyl linolenate ( S13 ), ethyl linoleate ( S14 ), ethyl linolenate ( S16 ), linalool ( T1 ), citronellol ( T2 ) and caffeine ( J3 ) contributed mainly to the antioxidant capacities.
研究领域:
食品科学
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分析化学
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农业科学
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高影响因子
TALANTA
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2024
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IF 5.6
Weimin Wang,Chuting Xu,Zhe Li,Chaohui Qiu,Fuxing Xu,Chuan-Fan Ding
Photoionization-ion trap mass spectrometry (PI-ITMS) is one of the major directions of mass spectrometer miniaturization because of its great potential for rapid on-site VOCs detection in many cases. Traditionally, PI has always been investigated separately and is restrained by ion transmission structure, so a new structure needs to be designed and investigated for simplifying and improving the ion transmission efficiency. Interestingly, our preliminary experiments found that the signal intensity and mass range can be effectively improved by combing atmospheric pressure photoionization (APPI) and low-pressure photoionization (LPPI). Therefore, in this paper, a new dual photoionization - ion trap mass spectrometry (DPI-ITMS) was developed, explored and used to directly analyze complex VOCs. Compared with traditional single PI configuration, it presents two obvious merits: (1) simplified ion transmission structure, eliminating the need to use deflection electrode to repel ions and avoiding breakdown risk. (2) some missing/weak low m / z ion mass spectral peaks in APPI and some high m / z ion mass spectral peaks in LPPI were improved in DPI detection mode. In addition, by combining multivariate statistical analysis, we preliminary achieved in differentiating fruit types and maturity level. In summary, we concluded that the developed DPI-ITMS has moderate detection sensitivity (limited by the homemade ITMS, 0.1–1 ppmv with RSD of 6.36 %), and the DPI-ITMS configuration can be referenced by future PI-MS, and this study also provides a high-throughput, simple, noninvasive and no chemical contamination solution for analyzing main VOCs in fruit aroma.
研究领域:
分析化学
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食品科学
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环境科学
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PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2025
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IF 6.2
Yao Xiao,Biao Li,Yaqi Ge,Xiaodong Zhu,Huiguang Bian,Chuansheng Wang
In this paper, choline chloride (ChCl) was used as the hydrogen bond acceptor (HBA) and xylitol, and sorbitol as bio-based hydrogen bond donors (HBD) to synthesize two natural deep eutectic solvents (NADES). The preparation mechanism of the two NADES and the effects of synergistic enhancement with bis-(γ-triethoxysilylpropyl)-tetrasulfide ( Si69) on silica/natural rubber (silica/NR) composites were investigated. The results demonstrated that both xylitol-based NADES (XYDES) and sorbitol-based NADES (SODES) improved silica dispersion and accelerated vulcanization. SODES was more effective than XYDES in improving the tensile strength, aging resistance, and dynamic mechanical properties of composites. Compared with the initial group, when 3 phr NADES were added, the rolling resistance of XYDES/silica/NR was reduced by 15 % and the wear resistance was increased by 17 %, the rolling resistance of SODES/silica/NR was reduced by 23 % and the wear resistance was increased by 17 %, with excellent anti-aging properties; when NADES replaced half of Si69, the tensile strength, and tensile product coefficient of XYDES/silica/NR were improved by 21 %, and 20 %, respectively, and those of SODES/silica/NR were improved by 25 % and 28 %, respectively. This research provided a new method for improving the filler dispersion and the magic triangle performance of green tires.
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高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2023
·Vol. 24
·期 16
·12789
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IF 5.6
Yanhui Wang,Xiaobing Zhu,Yixuan Jin,Ruichuan Duan,Yunkai Gu,Xiaowei Liu,Lei Qian,Fajun Chen
Plant volatile organic compounds (VOCs) are an important link that mediates chemical communication between plants and plants, plants and insects, and plants and natural enemies of insect pests. In this study, we tested the response in the selective behavior of western flower thrips,Frankliniella occidentalis, to the VOCs of kidney bean,Phaseolus vulgarisL., to explore their “attraction” or “repellent” effects regarding their application in integrated pest management (i.e., IPM). The results indicated that 12.7 μL/mL (E, E, E, E)-squalene, 3.2 μL/mL dioctyl phthalate, and 82.2 μL/mL ethyl benzene had a significantly attractive effect on the selective behavior ofF. occidentalis, while 10.7 μL/mL and 21.4 μL/mL 2,6-ditert-butyl-4-methyl phenol had a significantly repulsive effect on the selective behavior ofF. occidentalis, showing thatF. occidentalisresponds differently to specific concentrations of VOCs fromP. vulgarisplant emissions. Interestingly, the three compounds with the specific above concentrations, after being mixed in pairs, significantly attractedF. occidentaliscompared to the control treatment; however, the mixture with the three above compounds had no significant different effect onF. occidentaliscompared to the control treatment. It can be seen that the effect with the mixtures of three kinds of VOCs had the same function and may not get better. Simultaneously, the reasons for this result from the transcription levels of odorant-binding protein genes (OBPs) were determined. There were differences in the types and transcription levels of OBPs, which played a major role in the host selection behavior ofF. occidentalisunder the mixed treatment of different VOCs. It is presumed that there are specific VOCs fromP.vulgarisplants that have a good repellent or attracting effect on the selective behavior ofF.occidentalis, which can be used for the development of plant-derived insect attractants and repellents to serve as IPM in fields. But attention should be paid to the antagonism between plant-derived preparations and VOCs produced by plants themselves after application.Keywords:Phaseolus vulgarisL.;Frankliniella occidentalis;VOCs;attractive and repellant effects;selection behavior
研究领域:
昆虫学
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植物化学
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害虫管理
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PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
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IF 20.2
Jiejing Kong,Miaoqiu Tang,Yujia Luo,Shengnan Song,Ziwei Xiang,Yunlong Guo,Weiping Zhang,Guiying Li,Taicheng An
The trade-off between high visible-light response quantum yields and strong redox activity to achieve effective overall photocatalytic performance is still challengeable in the field of photocatalytic application. Herein, S-scheme heterojunction catalyst with high redox potential was developed by introducing small amount of Pt and excessive Bi into Bi 2 WO 6 /CeO 2 (denoted as BWO/CeO 2 ) through simple hydrothermal method, and applied to efficiently photocatalytic degradation of typical VOCs containing soot under visible light. It is experimentally proven that photogenerated charge transfer follows an S-scheme mechanism with interfacial Bi as a charge-transfer bridge and surface-deposited Pt as a photoexcited-electron trapper, which not only promotes charge separation but also enhances redox activity. Besides, both surface plasmon resonance of Bi nanoparticles and photothermal effect of soot trigger pyroelectric polarization of BWO to boost charge generation and separation, meanwhile induce photothermal synergistic effect of Pt/Bi-BWO/CeO 2 . All these beneficial factors lead to remarkably higher photocatalytic activity of Pt/Bi-BWO/CeO 2 catalyst in comparison with single component of photocatalysts, with higher reaction rate constant of 2.3 times than BWO/CeO 2 and 20.2 times than commercial CeO 2 . This work provides a visible photocatalytic strategy to efficiently purify VOCs containing soot, while perfectly transform soot pollutant into a valuable cocatalyst during catalytic processes.
研究领域:
环境科学
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材料科学
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化学工程
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高影响因子
Small
·
2025
·
IF 12.1
Mianyi Xiang,Yamin Liu,Ziyang Yang,Jinlei Jiang,Weicheng Wang,Yao Hu,Daxiang Cui,Qichao Li
Electronic noses (e-noses) have become indispensable analytical platforms for gas detection. However, conventional e-nose systems face significant limitations in portable and wearable implementations due to their bulk and high-power consumption. Herein, a single-sensor-based multifunctional e-nose system is reported by integrating a micro-electromechanical system (MEMS) gas sensor with a flexible printed circuit board (FPCB). Specifically, the ZnO-ZnSnO 3 raspberry-like microspheres (ZZSRM) are utilized as the gas-sensitive materials, and the gas selectivity of the sensor is enhanced through a dual-temperature modulation strategy. Additionally, a gas classification model based on the MiniRocket algorithm has been developed, enabling efficient feature extraction and low-complexity classification of response signals, thereby satisfying the real-time processing demands of embedded devices. Moreover, a silent communication method is proposed, which maps breathing frequency to Morse code for information transmission in specific scenarios. Experimental results demonstrate that the wearable system achieves high-precision classification and concentration prediction for eight volatile organic compounds (VOCs), while simultaneously enabling robust recognition of exhaled signals and instantaneous conversion of Morse code into legible alphabetic characters. By combining the gas sensor with artificial intelligence (AI) technology, this work establishes a multifunctional flexible e-nose that merges portable gas detection and silent communication, offering a novel technological framework for environmental monitoring and human-machine interaction.
研究领域:
生物医学工程
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微机电系统
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气体检测
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人工智能
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可穿戴设备
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PubMed
高影响因子
危险品化学品经营许可证（带存储）