INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2022
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IF 4.326
Xiaoxu Duan,Yuming Qian,Jiwei Wu,Liang Ma,Zhihuang Zhao,Liwang Wang,Lingyu Xiao,Shifan Zhang
The large amount of waste gas containing volatile organic compounds (VOCs) discharged from petrochemical sewage plants will cause air pollution and seriously endanger the safety of human beings and the ecological environment. In this paper, we proposed a photocatalytic oxidation degradation technique of VOCs and designed a photocatalytic reaction device loaded with TiO2/SnO2 catalyst. Under UV light irradiation, there is an energy level difference in the conduction band between TiO2 and SnO2, which makes the photogenerated electrons (e–) migrate to SnO2 and reduces the surface electron density of TiO2. Thus, the recombination of photogenerated electron–hole pairs (e––h+) is inhibited and the catalyst activity is improved. Meanwhile, the synergistic effect of the oxidation of hydroxyl radicals (·OH) and ozone greatly improves the conversion rate. In addition, in the industrial side line, by studying the influence of inlet gas volume, inlet gas concentration, and gas humidity (RH) on the conversion rate of the VOCs, we revealed the operation law of the photocatalytic technique in industrial applications. Under the best working conditions, the purification rate of the VOCs was as high as 92.73%. This technique can not only effectively avoid the damage to the environment caused by polluting VOCs but also promote the low-carbon and green development of enterprises in the industry.
研究领域:
环境科学
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化学工程
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高影响因子
STAR Protocols
·
2026
·Vol. 7
·期 3
·104823
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IF 1.4
Shu He,Bingxue Cao,Xinyi Zhang,Yabin Liu,Yongheng Zhang,Haowen Guo,Xingchun Zhai,Min Zhang
Summary Spatiotemporal encoding constructs drift-tolerant artificial-olfaction systems using a single sensing material. Here, we present a protocol for discriminating complex volatile organic compounds (VOCs) via this approach. We describe steps for hydrothermally synthesizing a porous CuP@G chemoresistive ink and laser-fabricating programmed micro-architectures. We then detail procedures for micro-cavity device assembly, spatiotemporal signal acquisition, and machine-learning interpretation. For complete details on the use and execution of this protocol, please refer to Zhai et al. 1
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DALTON TRANSACTIONS
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2026
·
IF 3.3
Yueqin Zhang,Li Zhou,Yuexin Du,Jiaqiang Xu,Junchen Chen,Lien-Yang Chou
Volatile organic compounds (VOCs), such as formaldehyde (HCHO) and acetone (C3H6O), are ubiquitous air pollutants in industrial and indoor environments and pose serious risks to human health, driving demand for selective, sensitive detection. Metal–organic frameworks (MOFs) are promising sensing nanomaterials due to their structural tunability and modifiable pore chemistry. However, the vast structural diversity of MOFs makes it difficult to identify materials with selective responses toward specific VOCs, and current development still relies heavily on empirical trial-and-error screening. Herein, we integrate density functional theory (DFT) calculations, quartz crystal microbalance (QCM) experiments and complementary spectroscopic characterization to establish a rational design strategy for VOC-selective MOF sensors, using functionalized UiO-66 as a model. DFT analyses quantify adsorption energies, hydrogen-bonding interactions, dipole coupling, and electronic perturbations between functionalized UiO-66 and HCHO or C3H6O. QCM measurements, Fourier-transform infrared (FTIR) and UV-vis spectroscopy verify the theoretical predictions. Our results indicate that UiO-66-NH2 preferentially responds to HCHO, while UiO-66-OH prefers C3H6O. This work shows a direct mechanistic link between the MOF structure and sensing performance, bypassing exhaustive empirical screening and laying a foundation for rational MOF sensor design.
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 23
·18758-18767
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IF 2.779
Yang Akang,Zhang Lun,Xu Yinyan,Wang Qian,Lyu Mei,Lu Hongbo,Zhu Jun
Cs 2 AgBiBr 6 is a lead-free perovskite that shows great potential to solve the toxicity and instability of organic–inorganic lead perovskite. However, because of the poor interface contact and inferior film quality, the open-circuit voltage and the power conversion efficiency of the solar cells are inhibited. Herein, the Cs 2 AgBiBr 6 film quality is improved by adding formamidinium acetate into the precursor solution. With additive regulation, the grain size increases and the film surface is more smooth. The crystal structure remains unchanged, and the defect density decreases. Correspondingly, the average power conversion efficiency of the target device increases more than 30% than the control device. The best efficiency approaches 2.09%, and the open-circuit voltage is surprisingly high at 1.23 V, the highest value reported for Cs 2 AgBiBr 6 solar cells. Moreover, the device remains more than 90% of its initial efficiency after 40 days of storage under environmental conditions, showing excellent stability. This work is therefore helpful for enhancing the efficiency and stability of inorganic lead-free perovskite solar cells toward future commercialization.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
ANALYST
·
2022
·Vol. 147
·期 21
·4903-4909
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IF 5.227
Quan Yu,Jing Gao,Xiaohua Yu,Jianbo Shi,Lin Lin,Xiaohao Wang
Gas–droplet reactions occur at the microdroplet interface and tend to be greatly accelerated, which has great potential value in chemical analysis. To exploit such value, we combined online derivatization with secondary electrospray ionization (SESI) to implement a special ionization technique, termed reactive SESI, for rapid analysis of gas samples. Specifically, a suitable reagent was added to the spray solvent of SESI to initiate rapid derivatization of gas analytes in the microdroplets. The product ions are subsequently detected using a mass spectrometer. Compared to offline derivatization in bulk solution, reactive SESI can provide a higher yield and a faster reaction rate, and it allows the detection of intermediate ions. It is found that the signal changes of the analyte, intermediate, and product ions are highly consistent, indicating that a two-phase derivatization process may occur at the droplet interface. For reactive SESI-MS analysis, the use of a sub-ambient pressure SESI source can significantly improve the detection efficiency, making this technique truly useful for analytical applications, including the quantification of formaldehyde at tens of ppb levels in air, as well as the detection of various trace VOCs in exhaled breath from mice.
研究领域:
分析化学
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环境科学
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医学检测
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DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
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2025
·
IF 6
Yunyun Li,Yuwei Zhang,Yihao Du,Yantu Zhang
Background Volatile organic compounds (VOCs) represent a major environmental concern due to their detrimental effects on atmospheric quality and public health. In response to this challenge, cataluminescence (CTL)-based sensing has emerged as a powerful analytical technique. This research focuses on engineering advanced CTL sensors through nanomaterial innovation, specifically the development of cerium oxide-based nanocomposites for enhanced VOC monitoring. The exceptional catalytic properties and rare-earth electronic effects of CeO 2 make it an ideal candidate for improving sensor performance. The work addresses a critical need for efficient VOC sensors by leveraging nanomaterial engineering to enhance CTL-based sensing platforms. Results The CeO 2 /M x O y nanocomposites (including CeO 2 /ZnO and CeO 2 /Sm 2 O 3 ) were successfully synthesized via a facile solvothermal method and systematically characterized using PXRD, FT-IR, SEM, and XPS. The CeO 2 incorporation significantly enhanced CTL responses compared to pure M x O y , due to cerium's exceptional catalytic activity and enhanced electron transfer. The optimized CeO 2 /ZnO system (λ = 440 nm, 300 °C, 270 mL min −1 ) demonstrated excellent linear response to diethyl ether with a remarkable detection limit of 6.29 × 10 −5 mol L −1 , while CeO 2 /Sm 2 O 3 (λ = 490 nm, 320 °C, 360 mL min −1 ) showed comparable performance for acetone detection. Both systems exhibited outstanding selectivity against over ten common VOC interferents and maintained stable responses through 11 operational cycles. Spike-recovery tests yielded satisfactory results (93–106 % recovery) with good precision (RSD 4.3–6.2 %), confirming the method's potential for environmental monitoring. Significance This study develops an innovative solvothermal approach for synthesizing CeO 2 /M x O y nanocomposites, significantly advancing CTL-based VOC detection through simultaneous improvements in selectivity, sensitivity, and operational stability. The established methodology offers a scalable platform for developing advanced gas sensors for environmental monitoring and industrial safety. By overcoming critical challenges in VOC sensing, this research facilitates the translation of CTL technology from laboratory research to practical air quality management.
研究领域:
环境科学
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纳米技术
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分析化学
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材料科学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
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2024
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IF 3.7
Xiangyi Kong,Jie Cheng,Wei Meng,Shujing Han,Zhen Song,Zhiwen Qi
As a volatile organic compound (VOC), styrene can pose significant risks to human health and environment if released into the air without proper treatment. Absorption based on ionic liquids (ILs) has been widely regarded as a promising VOC treatment approach, whereas there is limited research on capturing styrene by ILs. In this work, a multilevel framework was proposed to screen IL absorbents from the largest number of cation-anion combinations in the latest COSMObase. The COSMO-RS model is applied to estimate the absorption and desorption potentials of all IL candidates for styrene capture based on solubility prediction, while important physical properties of them namely melting point, viscosity, and toxicity are estimated by a recently-reported deep learning model. A parallel screening specific to the commercially available ILs in the initial candidate database was also performed. The top-ranked three ILs, identified in both scenarios with and without limiting the commercially availability, were further evaluated in a simulated absorption-desorption process in Aspen Plus. The most promising ILs in each scenario were figured out, which vividly demonstrates the value of discovering novel ILs.
研究领域:
环境化学
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化学工程
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绿色溶剂
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计算化学
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大气污染控制
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DOI
高影响因子
IEEE SENSORS JOURNAL
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2024
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IF 4.3
Yuan Feng,Huifang Chen,Neil Broderick,Simin Hong,Zhihan Zheng,Ben Xu,Chunliu Zhao,Juan Kang
Volatile organic compounds (VOC) are the main source of indoor pollution. Inhalation of excess VOC gas will cause respiratory system damage. Therefore, VOC gas detection is essential for environment monitoring. In this article, an optical fiber device for rapid detection of VOC gas was proposed. Rhodamine 6G (R6G) was taken as the fluorescence indicator. The VOC gas sensor was designed for the modulation of aggregation-caused quenching of R6G. The sensing device was fabricated with three simple steps: in the first step, a multimode fiber was tapered; in the second step, the hydrogel was coated on the tapered fiber tip; and in the last step, aggregated R6G was loaded in the hydrogel. When the senor was probed into a VOC gas chamber, the gas molecules penetrated into the hydrogel and deaggregated the R6G dimer, and then, the fluorescence of R6G was strengthened. With this spectrum change, the concentration of VOC gas could be obtained. Compared with other fiber devices for VOC gas detections, the proposed sensor has the advantages of single-end, low cost, simple preparation, fast response, and large detection range, which means a great potential for in situ detecting applications.
研究领域:
环境科学
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光学工程
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DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2019
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IF 3.261
Zhuang Wang,Xiaofeng Xie,Xiao Wang,Asad Mahmood,Hanxun Qiu,Jing Sun
In realistic Volatile organic compounds (VOC)-containing polluted air, VOCs often do not exist alone, but different VOCs coexist. The interaction between different VOCs affects their photodegradation. However, few studies have focused on the photodegradation of mixed VOCs. Herein, rGO-TiO 2 photocatalysts were synthesized by a modified refluxing-solvothermal method, and applied to photocatalytic degradation of single VOC (p-xylene and ethylene) and VOC mixture (containing benzene, toluene, p-xylene). It was found that rGO-TiO 2 possessed higher photocatalytic degradation activity for single VOC and VOC mixture than pure TiO 2 . The increased single VOC adsorption capacity, more efficient light harvesting ability, and enhanced separation efficiency of electron-hole were responsible for improved degradation performance of rGO-TiO 2 . In addition, superoxide radicals played a more important role than hydroxyl radicals for removing both p-xylene and ethylene. Interestingly, commercial TiO 2 (P25) underwent decreased efficiency (80.0% to 63.8%) in photodegrading from single p-xylene to p-xylene in VOC mixture, while it was remained unchanged (93.5%–93.0%) for T0.2G (0.2% mass ratio of reduced graphene oxide to TiO 2 ). This could be mainly attributed to sufficient adsorption sites provided by rGO sheets to mitigate competitive adsorption. Simultaneously, its photocatalytic activity showed no obvious decrease after five photodegradation cycles of mixed VOCs. These results suggested great potential of efficient photodegradation of VOC mixture by rGO-TiO 2 .
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Alexandria Engineering Journal
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2023
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IF 6.8
Youzheng Zhao,Yumei Zhu
Gas sensors based on metal oxide semiconductors have gained significant attention due to their cost-effectiveness, stability, and ease of production. This study investigates the performance of Co 3 O 4 /reduced graphene oxide (RGO) nanomaterials (C/R) for volatile organic compound (VOC) detection. The novel composite materials were synthesized via a one-step hydrothermal method with varying composite ratios. These materials were employed to fabricate thermal gas-sensitive elements, and their gas-sensing characteristics were extensively examined using a testing system. The study explores the influence of composite amount, working temperature, and gas concentration on the sensor's response. Importantly, the selectivity of Co 3 O 4 and C/R materials towards key VOCs, including acetone, methanol, ethanol, xylene, toluene, and formaldehyde, was evaluated. The results underscore the exceptional gas-sensing potential of the C/R composite, particularly the variant with an optimized ratio of components (C/R-2). This composite exhibited remarkable sensitivity to 100 ppm toluene gas at an operating temperature of 260 ℃. The enhanced performance is attributed to the synergistic effects between Co 3 O 4 and RGO, leading to improved selectivity and lower detection limits. The investigation revealed that the developed sensor outperforms pure Co 3 O 4 in terms of sensitivity, response time, and stability. The findings not only contribute to the fundamental understanding of composite materials for gas sensing applications but also hold significant promise for addressing environmental VOC detection challenges.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Journal of Materials Chemistry A
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2024
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IF 10.7
Zhen-Yu Wang,Lei Xu,Cai-Hua Liu,Sheng-Jie Han,Ming-Lai Fu,Baoling Yuan
Solar-driven interfacial water evaporation technology (SIET) is an emerging method for achieving sustainable production of clean water. Most available studies have focused on improving the evaporation efficiency of water, while less attention has been paid to the enrichment of evaporated organic contaminants, especially volatile organic compounds (VOCs) in distilled water, which is one of the key challenges in SIET. Herein, Ti3C2 MXene/CdS (MC) nanomaterials were synthesized by acid etching and hydrothermal methods, and MC composite hydrogels (MCHs) with synergistic effects of photothermal evaporation and photocatalysis were successfully prepared by crosslinking foaming polymerization. The water evaporation rate of optimal MCHs was 1.80 kg m−2 h−1 and the photothermal conversion efficiency of 82.80% could be achieved under one sun irradiation. Most importantly, MCHs significantly degraded a variety of organic contaminants in wastewater, among which the photodegradation rate of a typical VOC (phenol) was 85.12%, and the antibiotic metronidazole was completely removed. This research inferred that the MC hydrogels could be the promising synergistic photothermal evaporation and photocatalytic materials, providing a potential pathway for sustainable clean water production in the SIET field.
研究领域:
材料科学
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环境科学
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能源科学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
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IF 10.53
Guzheng Mao,Tao Liu,Yuan Chen,Xue Gao,Jinchao Qin,Haoli Zhou,Wanqin Jin
Mixed matrix membranes (MMMs) are typically fabricated by mechanically mixing presynthesized polymers and fillers together in a solvent to form a membrane solution, which often causes poor filler dispersion in the polymer matrix . In this work, an in situ polymerization method was proposed by which 2,6,14-triaminotriptycene (Trip), octanedioyl chloride, and graphene oxide (GO) reacted in the polymerization to form a polyamide@GO mixed matrix polymer. Different characterization methods, such as Raman analysis, XRD (X-ray diffraction), and TGA (thermogravimetric analysis), were used to verify the chemical linking between GO and polyamide . The performance of the polyamide@GO membrane in the separation of cyclohexane/nitrogen mixtures was evaluated and compared with that of pure polyamide membranes and mechanically mixed polyamide + GO membranes. The polyamide@GO membrane with a GO content of 0.3 wt% exhibited the highest separation performance. The permeability increased from 427 Barrer to 1098 Barrer under the same rejection (99.4%) conditions compared with that of the pure polyamide membrane. Because incorporation of GO disrupted the efficient stacking of polyamide chains, more amorphous domains were formed, providing more transport channels. This work provides an alternative way to overcome the trade-off phenomenon in the synthesis of new MMMs.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
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