ENVIRONMENTAL TECHNOLOGY
·
2025
·
IF 2
Xuekai Shan,Didi Lu,Peihang Wang,Zhuqiu Sun,Bairen Yang
Selenium(IV) (Se(IV)) supplementation was evaluated as a biostimulant to enhance m-dichlorobenzene (m-DCB) biodegradation in laboratory-scale biotrickling filters (BTFs) inoculated with Brevibacillus agri DH-1. An optimal Se(IV) concentration of 4.0 mg/L increased steady-state m-DCB removal efficiency from 74.38% to 81.74% at an empty bed residence time (EBRT) of 90 s. When the EBRT was reduced to 30 s, BTF2 maintained a 41.74% removal efficiency, compared with only 17.64% for BTF1. Se(IV) promoted extracellular polymeric substance production, strengthened biofilm adhesion, enhanced catechol-1,2- and catechol-2,3-dioxygenase activities, and moderated surface charge to favour microbial aggregation. Fourier-transform infrared spectroscopy confirmed Se(IV)-facilitated dechlorination and aromatic-ring cleavage, while 16S rRNA sequencing revealed enrichment of key degraders including Brevibacillus, Pseudomonas, Bacillus, Rhodanobacter, and Sphingobium. These findings demonstrate a novel micronutrient-based strategy to improve BTF performance for treating chlorinated aromatic exhaust gases.
研究领域:
环境工程
·
生物修复
·
微生物技术
·
空气污染控制
·
环境微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Manwen Hu,Jiejie Yu,Ruijie Qin,Jinwu Hu,Jingcheng Xu,Hui-jun Li,Hui Xu,Jingbo Chen,Ding Wang
Long-term exposure to xylene can seriously damage the respiratory and central nervous systems. Xylene poses significant health risks even at trace levels in the ppb range, highlighting the need for the ppb-level detection. Designing high-performance gas-sensitive materials and sensing structures is essential to address high operating temperatures and poor trace detection. In this work, PtPd nanobimetallic-sensitized CeO 2 porous nanospheres were prepared as the upper catalytic layer via solution self-assembly and impregnation, with WO 3 nanofibers as the lower sensing layer to form a bilayer sensor. The 1 wt%Pt 70 Pd 30 /CeO 2 /WO 3 sensor showed the best response (R a /R g = 38.67) to 10 ppm xylene at 180℃, and it demonstrates a obvious response to xylene at ultra-low concentrations down to 1 ppb (R a /R g = 1.4). The sensor also exhibits good stability and notable humidity resistance. By combining in-situ infrared and online mass spectrometry, we show that xylene is catalytically converted into toluene and methyl radicals upon passing through the 1 wt% Pt 70 Pd 30 /CeO 2 layer, significantly enhancing response performance. In summary, the novel bilayer sensor developed in this study enables trace xylene detection at the ppb level and shows potential for environmental monitoring applications.
研究领域:
材料科学
·
传感器与检测技术
·
环境监测
·
纳米技术
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TRANSACTIONS OF THE INSTITUTE OF MEASUREMENT AND CONTROL
·
2023
·
IF 1.8
Patigu Maimaiti,Patima Nizamidin,Nuerguli Kari,Buayishamu Kutilike,Abliz Yimit
This study concerns the development of a maghemite (γ-Fe2O3)-coupled tetra sulfophenyl porphyrin (TSPP) thin film–based optical waveguide (OWG) sensor (TSPP-γ-Fe2O3-OWG) for the detection of ethylenediamine (EDA). For ease of manufacture, we fabricated sensors using a spin-coating technique, and characterized their response based on their ultraviolet-visible (UV-vis) absorption spectra and the response intensity of OWG sensor. We have observed significant changes in the location of the peaks in the sensor’s UV-vis absorption spectra after exposed to EDA gas, indicating aggregation of TSPP. Optical characterization confirmed that the combination of TSPP with maghemite (TSPP-γ-Fe2O3-OWG) had improved device response, with twice as high as those of the acid-treated TSPP-OWG sensor, and 30 times higher than that of the pure γ-Fe2O3-OWG sensor. At ambient temperature, the composite sensor exhibited a linear response to EDA gas in the concentration range of 0.1–1000 ppm with signal-to-noise ratio (S/N) 8.33, confirming that the improved stability of the composite TSPP-γ-Fe2O3 thin-film OWG enables the detection of trace amounts of gas with high sensitivity and selectivity.
研究领域:
材料科学
·
化学传感器
·
光学器件
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Zhan Cheng,Hongmin Zhu,Hanyang Ji,Zhenyu Yuan,Fanli Meng
N-butanol, a standard volatile organic compound (VOC) gas with toxicity and flammability, seriously endangers human life and health. It is imperative to achieve rapid and trace detection of n-butanol. Oxygen vacancies have been proven to be an essential factor for VOC gas adsorption at the surface of metal oxide semiconductor (MOS) gas sensors. In view of the above, BiFeO3 (BFO) nanoparticles with abundant oxygen vacancies were prepared via simple sol–gel and annealing. Crystal structure, morphology, and compositions were systematically analyzed by a series of characterizations (XRD, SEM, HRTEM, EPR, and XPS). The response of the synthesized BFO-2 sensor reached 19.37 to 100 ppm n-butanol with a detection limit of 0.28 ppm at an optimal operating temperature of 280 °C. In addition, BFO-2 also has a fast response time, good stability and repeatability, and favorable selectivity to n-butanol. It is crucial to systematically explore the excellent selectivity of BFO sensors due to their abundant oxygen vacancies and large intrinsic crystal defects. Herein, adjusting the calcination temperature is one constructive strategy to tune the oxygen vacancy, which would prompt the gas sensing performance of BFO sensors to n-butanol.
研究领域:
材料科学
·
传感器技术
·
环境监测
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2021
·
IF 1.134
Rui-Jie WU,Xue-Min TIAN,Zhong-Qiu HUA,Ning LU,Pan WANG
Catalyst based on Ru loaded HZSM5 zeolite is prepared by a wet impregnation method, which is screen printed onto alumina substrates and serves as sensitive materials for the catalytic combustion sensor. The results show that Ru-HZSM5 catalyst has a high catalytic activity to combustible gases such as hydrogen (H 2 ) and carbon monoxide (CO) at low temperature. However, a poor dispersion of Ru reduces the catalytic activity of the catalyst when the Ru loading is too high. It is due to the pore structure of the sensitive material which facilitates the acquisition of high dispersion characteristics and gas selective regulation. The catalytic sensor based on Ru-HZSM5 also has high selectivity for combustible gases. Due to the low operating temperature, the sensor has a high selectivity for combustible gases and no cross-response to interfering gases such as ammonia (NH 3 ) and volatile organic compound (VOCs). Therefore, the catalytic type gas sensor with low power consumption and good selectivity can be used for monitoring CO, H 2 and other combustible gases.
研究领域:
材料科学
·
传感技术
✓ 已验证
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 51
·32126-32132
·
IF 3.108
Xiaohong Yang,Changxia Li,Meiling Qi,Liangti Qu
This work presents the separation performance of a 3D graphene-based porous carbon material (GPCM) as a new stationary phase for capillary gas chromatography (GC). The statically coated GPCM column showed a column efficiency of 3210 plates per m and weak polar nature. Its resolving capability and retention behaviours were investigated by using structural and positional isomers and a complex mixture covering analytes of diverse types. The GPCM column exhibits high resolution for nonpolar to polar isomers and analytes of wide ranging variety. It also displays a different retention mechanism from the commercial polysiloxane column, showing preferential retention of alcohols, aromatics and halogenated compounds. In addition, the GPCM column exhibited good column repeatability and reproducibility with RSD values on retention times in the range of 0.01–0.03% for intra-day, 0.06–0.36% for inter-day and 0.44–2.1% for between-column, respectively. The advantageous separation performance shows the good potential of the GPCM stationary phase for GC analysis.
研究领域:
分析化学
·
材料科学
✓ 已验证
DOI
高影响因子
Nanoscience and Nanotechnology Letters
·
2019
·Vol. 11
·期 8
·1070-1076
·
IF 0
Fu Shang,Zhang Hongguang,Wang Guowei,Wang Meng,Wang Yu,Xia Cunhui
We successfully obtained ∝-Fe2O3 microspheres with a ca. 500 nm diameter through solvothermal method and subsequent annealing at 300 °C for 2 h in air. The composition and morphology of the samples were analyzed by FT-IR, XRD, SEM, TEM, TG and BET.
The gas sensitivity measurements indicated that the sensor of ∝-Fe2O3 microspheres showed good selectivity and high response to aniline gas. This sensor showed a response to aniline gas as low as 0.01 ppm, and the response achieved 12.5 at 150 °C to 10
ppm aniline. The enhanced gas sensing properties were due to enough pore architectures of the sample. These results demonstrated that the samples have a good application prospect in preparation of high-performance gas sensors.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
Frontiers in Chemistry
·
2018
·
IF 4.155
Zhu Chonghui,Cheng Xiaoli,Dong Xin,Xu Ying ming
PANI/TiO2 nanocomposites spheres were synthesized using a simple and efficient one-step hydrothermal process. The morphology and structure of PANI/TiO2 nanocomposites spheres were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) techniques. The PANI/TiO2 nanocomposite sphere-based sensor exhibits good selectivity, sensitivity (5.4 to 100 ppm), repeatability, long-term stability and low detection limit (0.5 ppm) to ammonia at room temperature (20 ± 5°C). It also shows a good linearity relationship in the range of 0.5–5 and 5–100 ppm. The excellent NH3 sensing performance is mainly due to the formation of the p-n heterostructure in the nanocomposites.
研究领域:
材料科学
·
化学传感器
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 6
·5008-5016
·
IF 2.22
Peng Fang,Wang Shaojie,Yu Weiwei,Huang Tiantian,Sun Yan,Cheng Chuanwei,Chen Xin,Hao Jiaming,Dai Ning
Gas sensors with high performance and low energy consumption are necessary for system integration in the environment monitoring of explosives. High-performance room-temperature hydrogen sulfide (H 2 S) gas sensors were fabricated based on the hybrids of tungsten oxide (WO 3 )/reduced graphene oxide (rGO). WO 3 nanocubes modified with different contents of rGO were synthesized by acid-based hydrothermal method. The optimal amount of rGO in the composite is 5 wt%, at which the room-temperature operating sensor presents the highest sensitivity of approximately 32.7 to 500 ppb H 2 S, a fast recovery time of ~ 180 s, as well as an excellent sensing selectivity. The overall improvement in sensing performances demonstrated an important progress made in H 2 S sensor fabrication for portable and real-time gas detection. The improved gas-sensing performance is attributed to the large specific surface area of the WO 3 nanocubes, the formation of WO 3 /rGO heterojunctions, and the enhanced electron transfer efficiency.
研究领域:
材料科学
·
环境监测
✓ 已验证
DOI
高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2017
·Vol. 33
·期 9
·1898-1904
·
IF 0.767
YAO Chan,LI Guo-Yan,XU Yan-Hong
Polar groups in the skeletons of conjugated microporous polymers (CMPs) play an important role in determining their porosity and gas sorption performance. Understanding the effect of the polar group on the properties of CMPs is essential for further advances in this field. To address
this fundamental issue, we used benzene, the simplest aromatic system, as a monomer for the construction of two novel CMPs with multi-carboxylic acid groups in their skeletons (CMP-COOH@1 and CMP-COOH@2). We then explored the profound effect the amount of free carboxylic acid in each polymer
had on their porosity, isosteric heat, gas adsorption, and gas selectivity. CMP-COOH@1 and CMP-COOH@2 showed Brunauer-Emmett-Teller (BET) surface areas of 835 and 765 m2·g-
1, respectively, displaying high potential for carbon dioxide storage applications.
CMP-COOH@1 and CMP-COOH@2 exhibited CO2 capture capabilities of 2.17 and 2.63 mmol·g-
1 (at 273 K and 1.05 × 105 Pa), respectively, which were higher than those of their counterpart polymers, CMP-1 and CMP-2, which showed CO2
capture capabilities of 1.66 and 2.28 mmol·g-
1, respectively. Our results revealed that increasing the number of carboxylic acid groups in polymers could improve their adsorption capacity and selectivity.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER ENGINEERING
·
2021
·Vol. 41
·期 6
·458-466
·
IF 1.367
Wenxi Zhu,Xiuhua Zheng
Colloidal gas aphrons (CGA) are finding increasing application in depleted oil and gas reservoirs because of their distinctive characteristics. To overcome the limitations of its application in high-temperature drilling, a modified starch foams stabilizer WST with a temperature resistance of 160 °C was synthesized via radical polymerization. The chemical structure of WST was characterized by Fourier infrared spectroscopy and results showed that all three monomers acrylamide, 2-acrylamido-2-methyl-1-propane sulfonic acid, and N-vinylpyrrolidone have been grafted onto starch efficiently. Based on the microscopic observations, highly stable aphrons have been successfully generated in the WST-based CGA drilling fluids within 160 °C, and most aphrons lie in the range of 10–150 μm. WST can provide higher viscosity at high temperatures compared to xanthan gum, which helps to extend foam life and stability by enhancing the film strength and slowing down the gravity drainage. Results show that WST-CGA aged at elevated temperatures (120–160 °C) is a high-performance drilling fluid with excellent shear-thinning behavior, cutting carrying capacity, and filtration control ability. The significant improvement of filtration control and well-building capability at high temperatures is an important advantage of WST-CGA, which can be attributed to the enhancement of mud cake quality by WST.
研究领域:
石油工程
·
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
IEEE SENSORS JOURNAL
·
2025
·
IF 4.5
Mathankumar Ganesan,Jin Li,Fei Wang
In this study, we report the synthesis of a MoS2/Ce2Sn2O7 composite via a simple hydrothermal method. The selectivity of the as-fabricated sensors was systematically evaluated against a range of volatile organic compounds, including ethanol, acetone, methanol, n-butanol, isopropanol, and triethanolamine. Notably, the MoS2/Ce2Sn2O7 heterojunction exhibited superior selectivity for NH3 gas at room temperature, with the MoCe3 sample showing an impressive response of 87.3% to 100 ppm of NH3. Furthermore, the MoCe3 sensor displayed a rapid response time of 40 s and an ultra-low detection limit of 50 ppt. The sensors demonstrated excellent repeatability, stability, and humidity resistance when exposed to NH3, with the MoCe3 sensor particularly excelling at lower concentrations at room temperature. The MoCe3 sample also exhibited low activation energy (5 kJ/mol) and enhanced surface band bending compared to other sensors. The gas adsorption/desorption behaviors and the underlying gas sensing mechanisms were systematically explored, highlighting the transition between n-type and p-type phases. The dual-mode sensing capability of the MoS2/Ce2Sn2O7 composite, operational at both room and lower temperatures, opens up diverse applications ranging from environmental monitoring to industrial safety.
研究领域:
材料科学
·
传感器技术
·
纳米材料
·
气体传感
·
环境监测
·
工业安全
✓ 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）