Nano Energy
·
2022
·
IF 19.069
Peng Du,Ruyue Wang,Bohan Deng,Xian He,Yuanzheng Long,Cheng Yang,Zhiwei Wang,Binghui Ge,Kai Huang,Ru Zhang,Ming Lei,Hui Wu
The running of environmental purification usually employs massive consumption of energy, and it is of significant scientific importance and real impact to reduce the energy cost in environmental treatments. In particular, it is urgently required to minimalize the energy cost of the catalytic oxidation of gaseous pollutants represented by volatile organic compounds (VOCs). Herein, we develop a rapid in-situ Joule-heating configuration to drive the catalytic VOCs oxidation with ultra-low energy consumption. As a prototypical illustration, atomically dispersed Pt/CeO 2 catalyst was decorated on conductive Nickle foam substrate to act as both catalytic and electric components with minimal pressure drop and high compatibility. The catalytic system exhibited 100% conversion toward toluene (1000 ppm, 33 mL min −1 ) with an ultralow input power of 6.5 W, which was 87% lower than that of a conventional heating furnace. Moreover, the long-term stability, high universality for various VOCs, and responsiveness for real-time changing components were also demonstrated. The outstanding electro-thermal properties of the system can be extended to more gaseous catalytic reactions with much lower energy consumption.
研究领域:
环境科学
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催化
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能源效率
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材料科学
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化学工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Sadia Rehman,Xianming Zheng,Pengyi Zhang
The development of granular adsorbents for the efficient capture of low-concentration volatile organic compounds (VOCs) from humid air are highly desirable. Herein, we report the synthesis of granular ZIF-8 monolith ( mono ZIF-8) featuring high surface area (2312 m 2 /g) and mesoporous structure by shortening the synthesis time and optimizing the reactant concentrations, which was further carbonized at 1000 °C to obtain porous granular carbon. As-prepared ZIF-8-C1000 exhibited high surface area (1623 m 2 /g), hierarchical porous structure (0.5–10 nm) and hydrophobicity (water contact angle 145.8°), thus it showed very high adsorption performance for trace VOCs like toluene and hexanal under both dry and humid conditions (relative humidity 30 %-80 %) at 25 °C, much higher than commercial activated carbon (AC) such as BPL-AC, coconut shell AC, and representative MOFs including HKUST-1, mono HKUST-1, mono MIL-100(Fe), MIL-101(Cr) and MOF-235. Additionally, ZIF-8-C1000 could be rapidly regenerated under mild temperatures (60 °C to 80 °C), while BPL-AC requires a higher desorption temperature and more time due to disordered porosity. The exceptional adsorption and desorption performance of granular ZIF-8-C1000 over BPL-AC can be attributed to its interconnected micropores and mesopores.
研究领域:
材料科学
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环境工程
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化学工程
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产品关联
DOI
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2024
·Vol. 41
·期 8
·2321-2334
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IF 2.9
Chai Xinhan,Huang Weiqiu,Li Xufei,Wang Xinya,Zhou Yankang,Zhu Bing,Li Yuning,Tian Xinchen
Porous carbon foam (PCF), known for its high surface area and abundant functional groups, is considered to exhibit superior adsorption capacity and wide applicability for gases. Wheat, being a widely cultivated and easily accessible crop globally, contains abundant carbon elements. In this study, wheat powder served as the carbon precursor, and β-alanine, rich in amino and carboxyl groups, was introduced into the hierarchical pore structure of wheat powder. Subsequently, the material underwent secondary hydrothermal treatment with the activation agent potassium hydroxide (KOH), resulting in hydrothermal wheat powder PCF (HWPCF) rich in a three-dimensional interconnected structure with layered pores as the representative feature. This structural treatment increased the specific surface area (2278 m 2 ·g −1 ) and total pore volume (1.17 cm 3 ·g −1 ) of PCF, accelerating the rapid mass transfer of gas molecules and significantly enhancing the utilization of adsorption sites in the modified PCF. HWPCF exhibited outstanding adsorption performance for acetone (608.7 mg g −1 ) and n-hexane (517.6 mg g −1 ). In addition, the modified PCF showed good adsorption capacity for CO 2 (4.99 mmol·g −1 ). This study highlights the effective modification of expired wheat powder with β-alanine, reducing the overall carbon footprint of the production process and achieving the reuse of waste in an environmentally friendly manner.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Zeyu Duan,Jianping Sheng,Qijun Tang,Xinru Chen,Ying Jia,Fan Dong,Haiqiang Wang,Zhongbiao Wu
In this study, we report efficient gas–solid phase photocatalytic reaction by employing controlled periodic illumination, intense pulsed light (IPL) technique, at extremely low duty cycles. Compared with traditional continuous illumination, IPL exhibits superior photocatalytic performance, excellent economic advantages and extremely low duty cycles. Up to now, it is the first time that IPL has been applied in gas–solid phase photocatalytic reactions coupled with multiple photocatalysts. It is demonstrated by experiments that the pulsed xenon lamps can release a large number of photons in short pulsed time, leading to a much stronger photocurrent response than that triggered by a conventional xenon lamp. Taking photocatalytic benzenes degradation as the target reaction, in-situ EPR confirmed that the IPL system can generate a large number of reactive radicals, and thus can degrade benzenes efficiently even with almost negligible illumination period.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL POLLUTION
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2024
·
IF 7.6
Huijuan Liu,Yansong Yu,Chao Long
Desorption is a critical process in the recovery or post-treatment of adsorbents saturated with volatile organic compounds (VOCs). In this study, the thermal desorption behaviors for eight VOCs on hypercrosslinked polymeric resin (HPR) and macroporous polymeric resin (MPR) were investigated through isothermal desorption and temperature programmed desorption (TPD). Compared with MPR, HPR with more micropores exhibited a lower desorption rate constant, lower desorption efficiency and higher desorption activation energy due to the strong binding energy generated between VOCs molecules and narrow micropores. As the polarizability of VOCs increased, the desorption rate constants on two porous polymeric resins decreased, while the desorption activation energy showed an incremental trend. Excellent linear correlations were observed between VOC polarizability and desorption rate constants ( R 2 = 0.957 for HPR and R 2 = 0.940 for MPR) as well as between VOC polarizability and desorption activation energy ( R 2 = 0.981 for HPR and R 2 = 0.969 for MPR). Furthermore, a polyparameter linear free energy relationship (PP-LFER) was developed to explore the influences of intermolecular interactions on desorption behaviors of VOCs on porous polymeric resins. The results indicated that the dispersive interaction, which is directly related to polarizability of VOCs, was the primary factor influencing the desorption activation energy of VOCs on porous polymeric resins. The find from this study helps evaluate fleetly and availably the desorption properties of VOCs based on their polarizability.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Juntian Li,Li Tan,Qianyu Li,Didi Li,Zhimin Ao
The development of low-cost and efficient catalysts for volatile organic compounds (VOCs) oxidation remains a major challenge in industrial catalysis, particularly under humid conditions where the stability of traditional cluster-doped catalyst is often compromised. Metal-functionalized covalent organic frameworks (COFs), which integrate the catalytic activity of metal centers with the structural stability of COFs, offer a promising platform for designing robust catalysts. In this work, a series of transition metal-coordinated hexaazatriphenylene frameworks (TM-HAT, TM = Mn, Fe, Co, Ni, Cu, Zn) were designed for the oxidation of typical non-halogenated VOCs. Among them, Mn-HAT and Co-HAT demonstrated superior catalytic activity and CO 2 yield. Notably, Mn-HAT achieved complete conversion of ethyl acetate at 220 °C, together with remarkable long-term stability (70 h) and exceptional water resistance—retaining nearly 100% efficiency under 5 vol% water vapor. This exceptional water tolerance originates from the stable coordination environment of the Mn nodes within the crystalline HAT, which prevents active-site leaching and structural degradation under humid conditions. Comprehensive characterization revealed that the outstanding performance of Mn-HAT originates from its high lattice oxygen content (O latt /O ads = 1.70), abundant pyrrolic/pyridinic N species, and superior low-temperature reducibility. Furthermore, in-situ DRIFTS and post-reaction analysis confirmed that the catalytic oxidation follows the Mars–van Krevelen (MVK) mechanism, involving lattice oxygen consumption and the reduction of high-valence Mn species (Mn 4+ /Mn 3+ to Mn 2+ ). This study highlights the significant potential of TM-HAT as efficient and stable catalysts for industrial low-temperature VOCs removal under realistic, humid conditions.
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DOI
高影响因子
POSTHARVEST BIOLOGY AND TECHNOLOGY
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2026
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IF 7.3
Jia Hu,Wen-Wen Zhou
Blueberries and grapes are highly susceptible to fungal infections during pre-harvest, transport, and postharvest stages, leading to substantial economic losses. Conventional control methods often involve high equipment costs and contribute to the emergence of drug-resistant pathogens. Recently, the antifungal potential of volatile organic compounds (VOCs) has gained increasing attention as a sustainable alternative. Bacillus amyloliquefaciens HJ-B8 was successfully screened for its dual functionality of direct contact inhibition and volatile-mediated inhibition against Penicillium expansum . The VOCs produced by HJ-B8 were analyzed revealing a complex profile with several compounds that may contribute to its antifungal effect. The interaction between natamycin (Nata) and the HJ-B8 strain was also explored, showing a synergistic effect on fungal inhibition. A novel antifungal coating system was developed by combining HJ-B8 and Nata-loaded zein nanoparticles (HJ-B8@Nata-Zein NPs@Amy-Fe²⁺) to enhance the preservation of blueberries and grapes. The antifungal activities of this coating were evaluated in vitro and in vivo . The coating was further characterized by evaluating particle size, zeta potential, encapsulation efficiency, and light stability and assessed the antifungal efficacy. The in vivo tests demonstrated that the coating effectively reduced the decay rate, weight loss, soluble solids content and anthocyanin levels in treated blueberries and grapes. Furthermore, scanning electron microscopy (SEM) revealed improved preservation of fruit surface and flesh integrity. This opens up new possibilities for post-harvest preservation of berries using a synergistic antifungal coating system and provides a theoretical basis for related applications.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
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IF 10.652
Jinze Lyu,Lele Zhou,Junwei Shao,Zhen Zhou,Junxian Gao,Ji Li,Yuming Dong,Zhenyu Wang
Light absorption efficiency directly affects the photocatalytic degradation rate of volatile organic compounds (VOCs). Herein, we synthesized a TiO 2 hierarchical structure with a nanoscale hollow cavity and ultrathin nanosheet-assembled shell to efficiently harvest light. The micromorphology, light absorption, and charge separation of the prepared catalysts were analyzed via transmission electron microscopy, scanning electron microscopy, UV–vis diffuse reflectance, and surface photovoltage measurements. The adsorption and photocatalytic degradation of toluene and acetone were conducted to evaluate the catalysts’ performance in VOC elimination. The prepared TiO 2 /H 2 Ti 3 O 7 composite, FTHS, exhibited a spiny hollow morphology at the nanoscale, thereby considerably increasing its surface area and light absorption capacity compared with conventional TiO 2 hollow spheres (THS). Moreover, the optimized structure of FTHS enhanced the charge separation and electron accumulation on the catalysts’ surface. Owing to these advantages, FTHS showed evidently higher adsorption amount, removal rate, and mineralization efficiency of toluene and acetone than THS.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2019
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IF 7.65
Qun Zhao,Yingjie Li,Xiaolong Chai,Linzhen Xu,Linfeng Zhang,Ping Ning,Jianhong Huang,Senlin Tian
Exposure of volatile organic compounds (VOCs) towards lung leads to pulmonary dysfunctions and various lung diseases. However, the interaction of VOCs with pulmonary surfactant (PS) that directly comes into contact with inhaled VOCs is unknown. Here, simulated PS extracted from porcine lungs (EPS) was used to study the interaction with BTEX (i.e., benzene, toluene, ethylbenzene, and p -xylene) as representatives of VOCs. Surface pressure-area (π-A) isotherms showed that in the presence of individual BTEX, EPS monolayer’s phase conversion from gas to liquid expanded phase was dramatically influenced and its collapse pressure decreased greatly compared to those of EPS alone, which was attributed to the alteration of EPS monolayer’s microstructure characterized by atomic force microscopy and Brewster angle microscopy. Solubilization experiments manifested that EPS and its major components (dipalmitoyl phosphatidylcholine, DPPC; bovine serum albumin, BSA) exhibited obvious solubilization effects on individual BTEX. The solubilization capacity followed an order: EPS > DPPC > BSA, which was positively correlated with hydrophobicity of individual BTEX. Synergistic solubilization test unveiled that the mixed phospholipid components were largely responsible for the solubilization capacity of EPS. These findings indicate that VOCs exposure may induce potential pulmonary health risk due to the alteration of gas-liquid interfacial properties of PS.
研究领域:
毒理学
·
呼吸系统生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2019
·
IF 5.108
Ruijie Xie,Gaoyuan Liu,Dingping Liu,Shimin Liang,Dongxue Lei,Hanying Dong,Haibao Huang,Dennis Y.C. Leung
The traditional treatment processes for volatile organic compounds (VOCs) removal generally suffered several disadvantages, such as secondary air-pollutants. To overcome these issues, wet scrubber coupled with heterogeneous UV/Fenton was developed for gaseous VOCs (i.e. toluene) removal. ZSM-5 supported iron oxide (Fe/ZSM-5) was prepared as a multifunctional catalyst for activation of H 2 O 2 and enhancement of gas-liquid mass transfer. Toluene was removed efficiently by this coupled process with the removal efficiency of 85% during 120 min. Many intermediates were detected in the solution by GC-MS while no intermediates were observed in the outlet gas, suggesting that wet scrubber coupled with heterogeneous UV/Fenton could significantly reduce secondary air pollutants . The possible mechanism of toluene oxidation was proposed including the physical adsorption by Fe/ZSM-5 and OH oxidation. This study provides an environmentally benign and highly efficient chemical scrubbing process for gaseous VOCs removal.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Chemosensors
·
2022
·Vol. 10
·期 6
·226
·
IF 4.229
Xue Shi,Hua Zhang,Hanyang Ji,Fanli Meng
Volatile organic compounds (VOC) harm human health seriously in the air. Therefore, it is essential to recognize VOC gases qualitatively and quantitatively. The dynamic measurement method can improve the selectivity of metal oxide semiconductor (MOS) gas sensors to VOC, but there is a problem of the insufficient number of characteristic peaks. From the experimental point of view, the primary judgment basis for the correct qualitative and quantitative recognition of VOC gases by the dynamic measurement method is the characteristic peak of the dynamic response signal. However, the traditional dynamic measurement method generally only has two characteristic peaks. In this experiment, the voltage was changed at the time of the second characteristic peak by controlling the constant dynamic response period. Taking ethyl alcohol as an example, the experimental results show that the characteristic peak of the dynamic response signal does not increase when the voltage is constant. However, a new characteristic peak will appear based on a continuously rising heating voltage. The characteristic peaks of the dynamic response of n-propyl alcohol, isopropyl alcohol, and n-butyl alcohol were also increased based on the rising heating voltage waveform. Based on the K-Nearest-Neighbors algorithm, the qualitative and quantitative recognition rate of the four alcohol homologue gases reached 100%.Keywords:dynamic response signal;characteristic peaks;ZnO gas sensor;periodic cycle heating waveform;alcohol homologue gases
研究领域:
传感器技术
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Yue Sun,Yanbo Liu,Gangsen Yue,Jinhui Cao,Chong Li,Jie Ma
Traditional natural attenuation studies focus on aqueous process in the saturated zone while vapor-phase biodegradation and natural attenuation in the unsaturated zone received much less attention. This study used microcosm experiments to explore the vapor-phase biodegradation and natural attenuation of 23 petroleum VOCs in the unsaturated zone including 7 monoaromatic hydrocarbons, 6 n-alkanes, 4 cycloalkanes , 3 alkylcycloalkanes and 3 fuel ethers. We found that monoaromatic hydrocarbon vapors were easily attenuated with significantly high first-order attenuation rates (9.48 d −1 -43.20 d −1 ) in live yellow earth, of which toluene and benzene had the highest rates (43.20 d −1 and 28.32 d −1 , respectively). The 13 aliphatic hydrocarbons and 3 fuel ethers all have relatively low attenuation rates (<0.54 d −1 ) in live soil and negligible biodegradation contribution. We explored the effects of soil types (black soil, yellow earth, lateritic red earth and quartz sand), soil moisture (2, 5, 10, and 17 wt%) contents and temperatures (4, 15, 25, 35 and 45 °C) on the vapor attenuation. Results showed that increasing soil organic matter (SOM) content, silt content, porosity and soil microorganism numbers enhanced contaminant attenuation and remediation efficiency. Increasing moisture content reduced the apparent first-order biodegradation rates of monoaromatic hydrocarbon vapors. The vapor-phase biodegradation had optimal temperature (∼25 °C in yellow earth) and increasing or decreasing temperature slowed down biodegradation rate. Overall, this study enhanced our understanding of vapor-phase biodegradation and natural attenuation of petroleum VOCs in the unsaturated zone, which is critical for the long-term management and remediation of petroleum contaminated site.
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）