SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Yiran Zhang,Chunping Wu,Bang Xiao,Lin Yang,Anqi Jiao,Ke Li,Ting Chen,Reggie Zhan,Zhen Huang,He Lin
Detection of NO 2 attracted increasing interest to check the air quality and monitor exhaust emission of combustion facilities. In this study, the flame spray pyrolysis (FSP) method was used to prepare the La-doped WO 3 nanoparticles as NO 2 sensing materials for the first time. The FSP-made La-doped WO 3 nanoparticles showed that the doped La atoms were dispersed homogeneously on WO 3 particles in the form of La 2 O 3 . It was observed that in the concentration range of 150–1200 ppb at 125 ℃ , the WO 3 sensing responses were enhanced by La doping from 2.5 at% to 10 at%, and exhibited the highest sensing response when the La doping ratio was 7.5 at%. The 7.5 at% La-doped WO 3 shows the highest response (74.2) toward 900 ppb NO 2 at 125 ℃ with response/recovery times of 23 and 35 s. Then, the high-resolution XPS spectra and sensing mechanism were combined to investigate the La-doping effects, it can be found that the enhancement of La doping might result from the enriched vacancy oxygen and more absorption sites, as well as the p-n heterojunction that drives more electrons to react with NO 2 . Moreover, the sensor using 7.5 at% La-doped WO 3 presented an excellent anti-interference performance to single NH 3 , SO 2 , CO, CO 2 , and CH 4 , but were disturbed by ppm-level NH 3 and SO 2 coexisted with NO 2 . It also exhibited good resistance to RH fluctuation and good stability.
研究领域:
材料科学
·
环境监测
·
纳米技术
·
传感器
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ping Guo,Xuyang An,Xinxin He,Yinhua Hu,Jia Zhang
NO 2 is a prevalent atmospheric pollutant known to cause significant harm to both the environment and human health. In practical applications, the development of NO 2 sensors capable of functioning over a wide humidity range with high sensitivity and stability is crucial. Here, the Pt-decoration multi-scale three-dimensional Bi 2 S 3 nanoflower structure assembled by one-dimensional nanorods and two-dimensional reticulated nanomeshes was constructed by integrating the geometrical and electronic effects. The Pt/Bi 2 S 3 based sensors exhibit a high response of 3.92 and rapid response/recovery times of 15 s/136 s to 1 ppm NO 2 at room temperature. Furthermore, the Pt/Bi 2 S 3 based sensors show excellent selectivity and stability across a wide range of humidity levels (10 %-90 %RH). Finally, a portable NO 2 detector was designed for data acquisition and wireless transmission to enable real-time gas detection and hazard warning. Our study presents a multi-scale structure for sensitive materials design and practical application of high-performance NO 2 sensors operated in a wide humidity range at room temperature.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Gen Li,Jinan Li,Ya Wang,Yuhang Du,Hongyan Xu,Yan Wang
In this research, a two-step hydrothermal method was used to fabricate a NO 2 sensor based on WO 3 @ZIF-8 core-shell nanorods grown on ceramic tubes. The material's morphology, nanostructure, and composition were thoroughly characterized. The nanocomposites consisting of WO 3 @ZIF-8 showed significant sensing response (65) toward 50 ppm NO 2 at 200 °C. The WO 3 @ZIF-8 core-shell nanomaterials demonstrated exceptional selectivity to NO 2 against TEA and possessed good repeatability. Moreover, the distinctive core-shell nanorods structure promote the process of transferring the electrical charge of the carrier and the response to the targeted gas. The outer coating of ZIF-8 microporous material, with small pore window size (0.5–0.7 nm), had a sieving effect on large molecular interference gases. Further, we combined density functional theory (DFT) calculations and molecular dynamics simulations to investigate the reaction mechanism of the sensors.
研究领域:
材料科学
·
纳米技术
·
化学传感器
·
气体检测
·
理论化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Zixu Wang,Linna Han,Qing Xia,Wanfang Feng,Songtao Li,Liyan Liu
Enrichment and quantification of sugar phosphates (SPx) in biological samples are of great significance in biological medicine. In this work, a magnetic nanoscale metal–organic framework composite, Fe3O4@UiO-66-NO2, was synthesized and utilized as a high-capacity adsorbent for the enrichment of SPx in biological samples. Fe3O4@UiO-66-NO2 exhibited a high specific surface area (310.02 m2/g), a suitable pore size (3.47 nm), and strong magnetism (14.99 emu/g), enabling convenient separation and recovery. Experimental results demonstrated that Fe3O4@UiO-66-NO2 exhibited excellent adsorption performance for five types of SPx, achieving complete adsorption within 6 min at a dosage of 200 μg, and the adsorption process exhibited pH tolerance. The adsorption isotherm result indicated that the maximum adsorption capacities for different SPx ranged from 234.06 mg/g to 403.24 mg/g. Adsorption mechanisms using X-ray photoelectron spectroscopy, FT-IR, and density functional theory revealed multiple interactions, such as coordination and hydrogen bonding, and contributed to the adsorption process. A magnetic nanoscale-dispersive solid-phase extraction protocol was developed based on a Fe3O4@UiO-66-NO2 for rapidly enriching SPx from biological samples. The protocol allowed for SPx detection over a wide linear concentration range, low limits of detection (0.001–0.02 ng/mL), high precision (<7.88%), and good accuracy (82.56%–119.66%). This protocol was successfully applied to real blood samples, prefiguring the great potential of magnetic MOFs for the enrichment and detection of SPx in biological samples.
研究领域:
分析化学
·
材料科学
·
纳米技术
·
生物化学
·
环境科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Zhidong Jin,Jinbo Zhao,Lin Liu,Fei Liu,Dewen Zhao,Zhou Wang,Fenglong Wang,Jiurong Liu,Yue Mou,Lili Wu
Realizing nitrogen dioxide (NO 2 ) detections based on semiconductor-based gas sensors with high tolerance to humidity conditions is deemed to be a long-term challenge. To independently acknowledge the physiosorbed-water influence mechanism on semiconductor-based sensors, hydrophobic zeolitic imidazolate framework-8 (ZIF-8) covered chemisorbed-oxygen-nonexistence zinc hydroxyfluoride (ZnOHF) snowflake-like nanorod bundles are synthesized for NO 2 detections with non-hindrance of interfering gases and high humidity in our work. Gas-sensing testing results display that the 0.6ZIF-8/ZnOHF-based gas sensor provides an optimum NO 2 response of 12.1–10 ppm NO 2 at the operating temperature of 200 ℃ with excellent NO 2 selectivity. As the relative humidity (RH) increases from 20% RH to 80% RH, the response of the 0.6ZIF-8/ZnOHF sensor shows a marginal fluctuation of only 13%, exhibiting outstanding anti-humidity characteristics towards NO 2 detections, the outperformed NO 2 selectivity and humidity tolerance of which are greatly attributed to the unique band structures of ZnOHF and the surficial hydrophobic treatment by ZIF-8, which is further validated via In-situ diffuse reflection infrared Fourier transform spectroscopy ( In-situ DRIFTS) and electronic structure analyses. Humidity impact on ZnOHF poses a persuasive evidence for establishing the separate physiosorbed water interfering mechanism on semiconductors. This work endows a perspective on optimizing humidity tolerance for semiconductor-based sensors at low operating temperature.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Jinyong Hu,Yu Zhao,Bohao Liu,Yong Zhang
The exploitation of visible-light-activated gas sensors based on molybdenum disulfide (MoS 2 ) has been extensively investigated and is expected to hold tremendous potential in emerging fields of indoor gas sensing applications activated by daylight lamp. Enlightened by the localized surface plasmon resonance (LSPR) effect of Au nanoparticles in visible light spectrum and the abundant active sites of SnS quantum dots, an indoor white light activated gas sensor based on Au@MoS 2 /SnS nanocomposites is rationally developed for the high sensitive detection of nitrogen dioxide (NO 2 ). Under the white light irradiation, the as-proposed gas sensor demonstrates an enhanced response exceeding 25-folds toward 1 ppm of NO 2 compared with the pristine MoS 2 gas sensor. Moreover, the white light-activated Au@MoS 2 /SnS gas sensor manifests excellent repeatability, rapid response/recovery speed (7/8 s), ppb-level detection limit, favorable long-term stability, and remarkable selectivity toward NO 2 . These enhanced gas sensitive performances principally stem from the interfacial charge transfer effect within the Au@MoS 2 /SnS composite material and the multiplied gas-sensitive pathways facilitated by the LSPR effect originating from the Au nanoparticle cores. This work paves an efficacious avenue for the development of high-performance gas sensitive devices operable at room temperature, thereby facilitating innovative advancements of gas sensing technology in various Internet of Things (IoTs) applications.
研究领域:
材料科学
·
环境科学
·
纳米技术
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Jinyong Hu,Xing Liu,Jiawei Zhang,Xin Gu,Yong Zhang
Developing high-performance gas-sensing devices based on transition metal dichalcogenides (TMDs) has sparked significant research interest in efficient detection of hazardous gases at room temperature . Considering that the gas-sensing performances of TMDs-based sensors can be effectively improved by the localized surface plasmon resonance (LSPR) effect of decorated noble-metal nanoparticles, herein, we explored the LSPR effect on gas-sensitive features via the design of a visible-light-assisted gas sensor using Au@MoS 2 core-shell heterostructures as sensitive materials. The internal connection between the optical absorption and the gas-sensing properties of Au@MoS 2 heterostructures was investigated. Intriguingly, under the activation of indoor white-light, the optimized Au@MoS 2 sensor displayed an enhanced response by more than 8 times and elevated recoverability from 60% to 98% almost without baseline shift as compared with the pure MoS 2 gas sensor for the detection of NO 2 (1 ppm). The combination of experimental and theoretical analysis indicates that the improved gas-sensing performances can be primarily attributed to the effective amplification of the light absorption efficiency of MoS 2 induced by the LSPR effect from the Au nanoparticle cores. These results imply a potential application in monitoring NO 2 gas at room temperature and open up an effective thoughtway for developing high-performance visible-light-modulated gas sensors.
研究领域:
材料科学
·
传感器技术
·
光学
✓ 已验证
DOI
高影响因子
Nano Materials Science
·
2025
·
IF 17.9
Haineng Bai,Cheng Feng,Yiru Chen,Yunxiao Du,Yamin Feng,Kuili Liu,Yali Yan,Jia Liu,Baohua Zhang,Jin Wang,Dunjun Chen,Youdou Zheng,Fuqiang Guo
The porous NiO nanoplates modified with rGO nanosheets and SnO 2 nanoparticles are developed for accurate and rapid ppb-level NO 2 detection. The developed SnO 2 /NiO/rGO sensor towards 50 ppm NO 2 gas demonstrates an excellent gas-sensing response of 14.8 at 23 °C, which is 3.03 times that of NiO/rGO sensor (4.89) and 6.49 times that of NiO sensor (2.28), respectively. The developed SnO 2 /NiO/rGO sensor exhibits faster response/recovery speed (12.7/32.8 s @5 ppm), with extra-low theoretical detection limit of 0.15 ppb at room temperature. More fascinatingly, our sensors indicate great sensitivity, outstanding repeatability and long-term stability for longer than 7 weeks. Additionally, it also suggests that 1 °C and 1 % relative humidity have the same effect on the SnO 2 /NiO/rGO sensor signal as approximately 13 ppb and 7.0 ppb NO 2 gas change, respectively. Such excellent properties are mainly attributed to the large surface-to-volume ratio, which provides active sites to NO 2 gas spread, adsorption and diffusion on material surface in redox reaction. Moreover, the ternary heterojunctions formed by NiO, rGO and SnO 2 may serve as highly conductive channels to accelerate carrier transfer and abundant oxygen vacancies to reduce the adsorption energy for O 2 and NO 2 gas, thus further improving performance of the sensors.
研究领域:
材料科学
·
传感器技术
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
·
2018
·Vol. 96
·期 12
·2586-2592
·
IF 1.265
Renjie Deng,Kuiyi You,Fangfang Zhao,Pingle Liu,He'an Luo
In this work, a simple method for the highly selective preparation of valuable dinitronaphthalene from 1-nitronaphthalene employing NO 2 as a nitrating agent has been developed. The results demonstrated that HY zeolite as an eco-friendly and stable catalyst exhibits good catalytic performances. The total selectivity to valuable dinitronaphthalene compounds including 1,5-, 1,4-, and 1,3-dinitronaphthalene can reach 87.6 % in our present nitration reaction. Meanwhile, the physico-chemical properties of catalysts were characterized by XRD, FTIR, TG/DTG, BET, and NH 3 -TPD, and the probable nitration reaction mechanism was also suggested in this paper. The present nitration process seems to be a mild, eco-friendly, and economical route for the preparation of valuable dinitronaphthalene compounds.
研究领域:
化学工程
·
催化
·
环境化学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Renjie Deng,Kuiyi You,Lei Yi,Fangfang Zhao,Jian Jian,Zhenpan Chen,Pingle Liu,Qiuhong Ai,He’an Luo
A mild and highly efficient method for solvent-free low temperature catalytic nitration of toluene with NO2 promoted by molecular oxygen has been developed in the present work. The immobilized AlCl3–SiO2 catalyst was successfully synthesized by a chemical bonding method. The results indicated that the synergistic catalysis of molecular oxygen and catalyst remarkably improved the nitration efficiency. Under optimal conditions, 86.5% of toluene conversion with 100% of selectivity to mononitrotoluene was achieved at 35 °C. Furthermore, the immobilized 10% AlCl3–SiO2 catalyst exhibited excellent stability in this nitration process. Finally, the probable reaction mechanism for the catalytic nitration promoted by molecular oxygen over AlCl3–SiO2 was suggested. This work affords a simple, highly efficient, safe, and benign approach for the preparation of valuable mononitrotoluene under the mild conditions and has potential industrial application prospects.
研究领域:
化学工程
·
催化
·
有机化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Lanlan Guo,Wei Zhao,Linlin Dong,Xin Shi,Guodong Wang,Rui Li,Jianliang Cao,Xueli Yang,Xiaolian Liu,Yan Wang
The construction of high-performance sensitive materials is a basis for excellent sensors. Among prior SnS 2 -based sensors, high sensing performance often accompanies high operating temperatures or expensive costs, which limits their practical use. Herein, we employed Sr doping and NaBH 4 treatment strategies to increase the S-vacancies content in the SnS 2 microflowers. Particularly, this composite sensitive material shows large specific surface area, low crystallinity and rich S-vacancies content, which enables this sensor excellent sensing properties toward NO 2 , with a response of 4.7 toward 5 ppm NO 2 at 100 °C. In addition, this sensor has a low detection limit for NO 2 as low as 0.2 ppm, which is a lower value compared to many SnS 2 -based NO 2 sensors as reported. XRD, SEM, TEM, EPR and BET characterization combined with density functional theory (DFT) calculations are adopted to illustrate the enhancement mechanism toward NO 2 of the composite sensitive materials fabricated in this work. This study provides new ideas and scientific basis for the construction of metal sulfide based NO 2 sensors, which has important theoretical significance and application value.
研究领域:
材料科学
·
传感器技术
·
计算化学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Chongyang Wang,Bowen Zhang,Bo Zhang,Zhenyang Zhang,Mengjie Chen,Saisai Zhang,Hari Bala,Zhanying Zhang
The three-dimensional (3D) microstructures assembled by nanomaterials have attracted great attention due to their unique hierarchical structure and large surface area. In this study, the hierarchical nanosheets-assembled SnS 2 hollow microspheres with an average diameter of 6.1 μm were synthesized via a facile hydrothermal method . Then Pt nanoparticles were deposited on the surface of SnS 2 to form Pt/SnS 2 nanocomposites using the in-situ reduction method. Compared with pristine SnS 2 -based sensors, the Pt/SnS 2 sensors exhibited improved gas-sensing performances to NO 2 gas, including higher sensitivity, shorter response time , and better selectivity . The superior sensing performance can be ascribed to the Schottky junction created between Pt and SnS 2 , along with the catalytic effect of Pt. Moreover, the adsorption energy of SnS 2 and Pt-modified SnS 2 for NO 2 molecules was calculated using first principles based on density functional theory (DFT). The Pt modification can enhance the interaction of NO 2 with the SnS 2 surface, which is favorable for improving the gas-sensing properties. This work provides novel hierarchical SnS 2 microspheres based gas sensors for NO 2 detection.
研究领域:
材料科学
·
纳米技术
·
气体传感
·
环境监测
✓ 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）