ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2022
·Vol. 414
·期 6
·2275-2284
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IF 4.478
Ge Dianlong,Zhou Jijuan,Chu Yajing,Lu Yan,Zou Xue,Xia Lei,Liu Yawei,Huang Chaoqun,Shen Chengyin,Zhang Liwei,Wang Huanzhong,Chu Yannan
By means of glass bottle sampling followed by solid-phase microextraction gas chromatography-mass spectrometry (SPME-GC-MS) technique, the change characteristics of volatile organic compounds (VOCs) in breaths, between before gargling and after gargling, were investigated, respectively, in 41 healthy subjects and 50 esophageal cancer patients. Using an untargeted strategy, 143 VOC chromatographic peaks were enrolled in the statistical analysis. Based on the orthogonal partial least squares discriminant analysis (OPLS-DA), the VOC variations after gargling for each breath test group were obtained according to the combined criteria of variable importance in projection (VIP > 1.5), Wilcoxon signed-rank test ( P < 0.05), and fold change (FC > 2.0). When gargled, the levels of indole, phenol, 1-propanol, and p-cresol in the breath of healthy people decreased; meanwhile, for esophageal cancer patients, the declined VOCs in breath were indole, phenol, dimethyl disulfide, and p-cresol. Particularly, these substances were previously reported as breath biomarkers in some diseases such as esophageal, gastric, thyroid, breast, oral, and lung cancers, as well as certain non-cancer disorders. The present work indicates that expiratory VOCs involve the prominent oral cavity source, and in the breath biomarkers study, the potential impact that originates from oral volatiles should be considered. In view of the present results, it is also proposed that gargle pretreatment could eliminate possible interference from the oral cavity VOCs that might benefit breath biomarker investigation. Graphical abstract
Gargle pretreatment helps to distinguish oral-source VOCs and control their potential impact on breath biomarkers
研究领域:
医学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL PHYSICS
·
2020
·Vol. 33
·期 4
·477-484
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IF 1.067
Qi Ling-li,Zhong Chun-yan,Deng Zan-hong,Dai Tian-tian,Chang Jun-qing,Wang Shi-mao,Fang Xiao-dong,Meng Gang
In this work, p-type Co 3 O 4 decorated n-type ZnO (Co 3 O 4 /ZnO) nanocomposite was designed with the assistance of bacterial cellulose template. Phase composition, morphology and element distribution were investigated by XRD, SEM, HRTEM, EDS mapping and XPS. Volatile organic compounds (VOCs) sensing measurements indicated a noticeable improvement of response and decrease of working temperature for Co 3 O 4 /ZnO sensor, in comparison with pure ZnO, i.e ., the response towards 100 ppm acetone was 63.7 (at a low working temperature of 180 °C), which was 26 times higher than pure ZnO (response of 2.3 at 240 °C). Excellent VOCs response characteristics could be ascribed to increased surface oxygen vacancy concentration (revealed by defect characterizations), catalytic activity of Co 3 O 4 and the special p-n heterojunction structure, and bacterial cellulose provides a facile template for designing diverse functional heterojunctions for VOCs detection and other applications.
研究领域:
材料科学
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环境科学
·
传感器技术
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 9
·6698-6706
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IF 2.993
Gao Bingying,Yuan Guojun,Ren Lili
Abstract Aiming to develop universal, effective, and visually observable sensing nanomaterials for detecting concentrations of volatile organic compounds (VOCs), we fabricated a functionalized alumina aerogel sheet by embedding a chromatic conjugated polymer–polydiacetylene (PDA) in alumina aerogel pores, which underwent dramatic color changes upon exposure to different concentrations of VOCs. Taking the activated carbon as the example, we designed an air purification detection system by using the as-synthesized PDA-functionalized alumina aerogel sheets, which could give a definite indication from the changes of color. Overall, this study presents a simple and low-cost method to fabricate PDA-functionalized alumina aerogel sheet in which noncovalent interactions between the alumina aerogel sheet substrate and spin-coated PDA give rise to distinct chromatic properties after exposure to different concentrations of VOCs.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
DOI
高影响因子
Waste and Biomass Valorization
·
2018
·Vol. 10
·期 12
·3921-3929
·
IF 1.874
Feng Yukun,Wang Wenlong,Wang Yican,Sun Jing,Zhang Chao,Mao Yanpeng,Zhao Xiqiang,Song Zhanlong
Purpose In recent years, haze has become a critical environmental issue. As a crucial precursor of haze, volatile organic compounds (VOCs) have become a major research focus. Methods In this study, microwave-induced metal discharge was developed for VOC decomposition. Toluene was used as the VOC model compound. Four types of metal strips were investigated for their decomposition efficiency of toluene using a microwave-induced metal discharge process. Results All discharges, regardless of the metal type, achieved a high decomposition efficiency of toluene [> 60% (mol/mol)]. In addition, the effects of reaction conditions such as metal strip weight, gas flow rate, microwave power, and gas initial concentration were studied to investigate the decomposition efficiency. The reaction conditions were optimized following a multi-factor orthogonal experiment. The weight of the metal strips and gas flow rate had greater impacts on the decomposition efficiency, whereas the microwave power had a moderate impact. The major reaction products were CO 2 , CO, O 3 and H 2 O. Both hydroxyl radicals and active oxygen atoms were very important for toluene oxidation. Conclusion This study offers an important reference for the development of new technology to support the decomposition of VOCs.
研究领域:
环境科学
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化学工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9
Min Yin,Lihua Chen,Yanyu He,Shaopeng Chen,Wenyu Zheng,Qi-Meige Hasi
Solar-driven interfacial evaporation holds significant potential for treating oily wastewater. Traditional evaporators may become clogged due to residues or contamination caused by the release of volatile organic compounds (VOCs). We have developed a novel evaporator that combines oil-water interfacial evaporation with photocatalytic removal of VOCs. In experiments using simulated seawater, oily wastewater, phenol (PNP), and p-nitrophenol (PhOH)-contaminated water, we evaluated water evaporation efficiency and VOCs degradation. The temperature gradient on the aerogel surface, combined with interfacial evaporation and photocatalysis, enhanced evaporation efficiency. The oil-modified surface prevents oil blockage, while the photocatalytic coating effectively removes VOCs and enhances thermal regulation. Under 1 kW m −2 solar irradiance, the O-PPy/PTh-PI/MXene aerogel treated 10% oil-contaminated wastewater with an evaporation rate of 1.37 kg m −2 h −1 and an evaporation efficiency of 89.75%. Interface evaporation desalination treatment of source water contaminated with PNP and PhOH achieved a TOC removal rate exceeding 98%. An expanded aerogel evaporator array produced approximately 9.21 kg/(m 2 ·d) of pure water under actual sunlight. This successful demonstration highlights the evaporator's efficient evaporation potential at the interface for treating oily wastewater, showcasing its broad application prospects.
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Chaoyan Wen,Yingxuan Liu,Shuyu Li,Lin Teng,Maoqing Chen,Xiaoming Chen,Yong Zhao
This study reports a high-performance fiber-optic volatile organic compound sensor based on a tunable nanostructured polyvinyl alcohol/TEMPO-oxidized cellulose nanofiber (PVA/TOCNF) composite aerogel coating, where TEMPO denotes 2,2,6,6-tetramethylpiperidine-1-oxyl. By precisely modulating the mass ratio of PVA to TOCNF, the influence mechanism of the nanoskeleton's morphological evolution on the gas-sensing performance was elucidated. A three-dimensional porous sensitive film with a high specific surface area and abundant functional groups was constructed in situ on the interference region of an SMF-MMF-SMF structure using dip-coating combined with freeze-drying technology. The results demonstrate that the sensor achieves optimal performance at a PVA/TOCNF mass ratio of 3:1, with an acetone sensitivity as high as 4.74 pm/ppm, a 22.15-fold increase compared to the pure PVA-coated sensor, alongside significantly enhanced selectivity and response speed. Furthermore, the sensor exhibits excellent repeatability and long-term stability. This work validates, for the first time, the feasibility of PVA/TOCNF composite aerogels in the field of optical gas sensing, providing a novel strategy for the development of eco-friendly, high-performance, and cost-effective fiber-optic VOC sensors.
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DOI
高影响因子
Small
·
2025
·
IF 12.1
Meiqi Ye,Hanye Xing,Yang You,Yuqing Xie,Yang Liu,Wanyi Chu,Aiyong Zhang,Xiangsong Lin,Jingzhe Xue,Yang Lu
3D design has effectively enhanced photothermal materials water evaporation performance via utilizing side surfaces. However, for photothermal/photocatalytic composite evaporators which can effectively degrade volatile organic compounds (VOCs) to prevent their contamination in condensate, introducing 3D design should promote VOCs escaping from the evaporator sides surface, reducing efficiency of VOCs photocatalytic degradation. Herein, a bioinspired unidirectional silk fibroin (SF)-Ag 2 S/Ag 3 PO 4 3D evaporator is reported to achieve synergy between enhancing water evaporation and maintaining VOCs photocatalytic degradation efficiency. The unidirectional channels are modified with Ag 2 S/Ag 3 PO 4 composite as both photothermal and photocatalytic agents. By promoting directional water transfer, the bioinspired unidirectional scaffold achieves an evaporation rate of 2.86 kg m −2 h −1 under 1 sun with the assistance of side-surface evaporation. Furthermore, the unidirectional channels effectively restrict the horizontal migration and the escape of VOCs from side surface, directing their transport toward the top surface, where the VOCs can be photocatalytically degraded by Ag 2 S/Ag 3 PO 4 composite. Accordingly, bioinspired SF-Ag 2 S/Ag 3 PO 4 scaffold maintains 91.9% VOCs removal performance under 1 sun in 10 mg L −1 phenol-contaminated water. Moreover, compared with the evaporator without directional VOCs transportation, bioinspired scaffold shows 96% and 41% increase in VOCs removal and water evaporation, respectively, under 2 suns in 100 mg L −1 phenol solution.
研究领域:
材料科学
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环境工程
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纳米技术
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化学工程
·
太阳能
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Jijuan Zhou,Dianlong Ge,Yue Liu,Yajing Chu,Xiangxue Zheng,Yan Lu,Yannan Chu
Cellular volatile organic compound (VOC) detection is crucial for studying lung cancer biomarkers. However, the reported VOC biomarkers from the same cell line seem to be inconsistent across different research groups. It is possibly related to the variation in culture media, and the result obtained by a conventional single medium approach (SMA) depends on what medium is used in the cell experiment. This study proposes a multiple media approach (MMA) to investigate reproducible characteristic VOCs of lung cancer cells. Using solid-phase microextraction–gas chromatography–mass spectrometry (SPME-GC-MS) in combination with untargeted analysis, we conducted two independently repetitive experiments to compare lung cancer cells (A549) and normal lung cells (BEAS-2B) under three culture media conditions (RPMI 1640, DMEM, and Ham’s F12). Both experiments indicated that, compared with 62–96 VOCs obtained by the SMA, only two VOCs (3-methyl-1-butanol and 2-methyl-1-butanol) were reproducibly achieved by the MMA. Moreover, their concentrations were significantly lower in lung cancer cells than in normal cells. Further targeted analysis confirmed the downregulation trend of both VOCs in subcutaneous and primary tumor tissues from the lung cancer model mouse. The present work demonstrated that the MMA cell experiment, just like the multicenter trials for cell lines, can facilitate the discovery of reproducible characteristic VOCs. This provides a cellular experimental basis and scientific evidence for lung cancer biomarker investigation and even breath biopsy technique development.
研究领域:
医学
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分析化学
·
肿瘤学
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产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2025
·
IF 3.7
Su Changqing,Jiang Wentao,Guo Yang,Yi Guodong,Li Zengxing,Li Huan
The objective of this study was to identify and synthesize functional groups for the efficient adsorption of volatile organic compounds (VOCs) through a combination of theoretical calculations, molecular design, and experimental validation. The density functional theory (DFT) calculation, focusing on the P-containing functional groups, showed that methanol adsorption was dominated by the electrostatic interaction between the carbon surface and methanol, while toluene was mainly trapped through π-π dispersive interaction between toluene molecule and functional group structure. The experimental results showed the phosphorus-doped carbon materials (PCAC) prepared by directly activating potassium phytate had a phosphorus content of up to 4.5 at.%, mainly in the form of C—O—P(O)(OH) 2 . The material exhibited a high specific area (987.6 m 2 ·g –1 ) and a large adsorption capacity for methanol (440.0 mg·g –1 ) and toluene (350.1 mg·g –1 ). These properties were superior to those of the specific commercial activated carbon (CAC) sample used for comparison in this study. The adsorption efficiencies per unit specific surface area of PCAC were 0.45 mg·g⁻ 1 ·m⁻ 2 for methanol and 0.35 mg·g⁻ 1 ·m⁻ 2 for toluene. This study provided a novel theoretical and experimental framework for the molecular design of polarized elements to enhance the adsorption of polar gases, offering significant advancements over existing commercial solutions.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
AICHE JOURNAL
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2025
·
IF 4
Qinghua Liu,Guoxuan Li,Chengmin Gui,Minghao Song,Fei Zhao,Shengchao Yang,Zhigang Lei,Pan Xu
Deep eutectic solvents (DESs) were regarded as promising absorbents in many absorption processes. Here, we use randomly methylated β -cyclodextrin (RAMEB) to further improve the absorption capacity of DESs for aromatic VOCs. We found benzene and toluene vapor pressures obviously decreased after adding 2% RAMEB (molar fraction) to DESs. Dynamic absorption experiments also confirmed this enhancement effect; the dynamic absorption efficiency for benzene and toluene increased by 6.12% and 9.23%, respectively, at a 5 mL/min solvent rate. Water was used to reduce the viscosity of DESs; the humidity and regeneration stability were evaluated experimentally. At the molecular level, the strong host–guest interactions between RAMEB and aromatic VOCs were identified as the main reason for improving the absorption capacity of DESs. Additionally, the roles of hydrogen bond donor and acceptor molecules were analyzed. π–π stacking and CH–π interactions were also identified as significant contributors to the aromatic VOCs absorption process.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2022
·
IF 2.719
Aihu Feng,Yang Yu,Le Mi,Yunzhen Cao,Yun Yu,Lixin Song
Adsorption is one of the most effective methods to control the concentration of VOCs pollution. In this work, the hierarchical USY zeolites with size-controlled mesopores are obtained via NH 4 HF 2 -etching and surfactant-templating process. It is found that the non-framework aluminum inside USY is effectively removed by NH 4 HF 2 -etching, and the irregular mesopores inside NH 4 HF 2 -etched USY are transformed into small-sized mesopores with a size of ∼4 nm after subsequent surfactant-templating treatment. The formation mechanism of the small mesopores with controllable pore size is elucidated, and the adsorption properties of NH 4 HF 2 -etched USY-s for different VOCs molecules are demonstrated.
研究领域:
材料科学
·
环境工程
·
吸附技术
·
多孔材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Jinhui Zhang,Yun Hu,Junxian Qin,Zhenxiang Yang,Mingli Fu
TiO 2 -UiO-66-NH 2 nanocomposites with different mass ratios were successfully prepared by a simple solvent evaporation method for photocatalytic oxidation of toluene and acetaldehyde under UV light condition. The experimental results revealed that the nanocomposites exhibited superior removal efficiency for toluene and acetaldehyde than the pure TiO 2 , UiO-66-NH 2 and other TiO 2 -based porous materials during a 720 min of long-term evaluation under flowing conditions. The as-prepared 75TiO 2 -25UN nanocompoites exhibited the highest photocatalytic activity and CO 2 selectivity. The conversion of 75TiO 2 -25UN for toluene and acetaldehyde were 72.7% and 70.74% respectively, which was about 9.7 and 10.5 times higher than that of UiO-66-NH 2 , respectively. In addition, the CO 2 production of 75TiO 2 -25UN for toluene and acetaldehyde were 21.1 and 14.3 times higher than that of pure UiO-66-NH 2 , respectively. N 2 adsorption-desorption and SEM results revealed that high surface area could enhance the dispersion of TiO 2 and efficient contact to the VOCs. Photoelectrochemical properties indicated that photoinduced carriers can be efficiently separated and transferred via the interface of two components. The outstanding deactivation resistance was achieved over 75TiO 2 -25UN sample due to the efficient charge transfer and oxygen-rich condition. The possible mechanism of VOCs oxidation was proposed based on radical scavenger experiments, which proved that O 2 − and h + are the main active species. This work clearly demonstrated that MOF-based composite can be used as efficient photocatalysts for the application of VOCs oxidation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）