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
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
·
2016
·
IF 2.567
Jian Jian,Kuiyi You,Qing Luo,Hongxu Gao,Fangfang Zhao,Pingle Liu,Qiuhong Ai,He’an Luo
Developing an economic and efficient approach for the production of adipic acid is a grand challenge in the chemical industry. Toward this goal, we report a simple method for selective synthesis of adipic acid from cyclohexane with NO2 by using Ni–Al–VPO/MCM-41 as catalyst. The physical-chemical properties of supported Ni–Al–VPO/MCM-4 catalysts were characterized, the reaction conditions were optimized, and the reusability of the catalyst was examined. The results showed that the supported 30%Ni–Al–VPO/MCM-41 catalyst exhibited excellent catalytic performance with 65.1% of cyclohexane conversion and 85.3% of selectivity toward adipic acid, especially, its catalytic performance was still stable after five runs. Maybe this developed method has potential industrial application prospects for production of adipic acid.
研究领域:
化学工程
·
催化
·
材料科学
✓ 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
·
2021
·
IF 7.46
Rui Gao,Lang Gao,Xianfa Zhang,Shan Gao,Yingming Xu,Xiaoli Cheng,Ghuanyu Guo,Qinghua Ye,Xin Zhou,Zoltán Major,Lihua Huo
ZnO@the reduced graphene oxide (rGO) nanorod arrays were grown in-situ on the ceramic tube substrate by one-step hydrothermal without any template or surfactant. The reduced graphene oxide was evenly coated around the ZnO nanorods through the controllable assembly of the rGO and ZnO heterojunction interface. rGO contributed to the improvement of material conductivity and provided more active sites to adsorb NO 2 molecules. The combination of rGO and ZnO significantly enhanced the response of the composite to NO 2 at room temperature . It showed an excellent selectivity to NO 2 and a good linear relationship in the concentration range of 0.1∼10 ppm. In order to explore the response mechanism of ZnO@rGO composite to NO 2 , the change of element composition and status was performed by XPS technology before and after the exposure of the composite to NO 2 . The gaseous products after the reaction were also tested by GC–MS technology. DFT calculations were performed based on the test results, which demonstrated that the p-n heterostructure produced by the ZnO@rGO composite had a beneficial effect on improving the gas response capability.
研究领域:
材料科学
·
环境科学
·
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
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Xiqi Chen,Jinyong Hu,Pei Chen,Mengqi Yin,Fanpu Meng,Yong Zhang
Transition metal dichalcogenides (TMDs) have blazed a novel trail in the field of NO 2 gas detection owing to the unique photoelectric properties and prospective gas sensing performance especially working at low operating temperature. However, the incomplete recoverability and susceptibility to humidity at room temperature restrict the practical applications of TMDs-based gas sensors. Herein, we demonstrate a fully recoverable WS 2 based gas sensor with enhanced anti-humidity ability by combining the decoration of zero-dimensional PbS nanoparticles and the assistance of UV light. Through the control over the molar ratio of WS 2 /PbS, the optimized WS 2 /PbS (the molar is 10:1) gas sensor exhibits a remarkable elevated recovery rate from 33.4% to 99.8% with almost no baseline drift as compared to that in the pure WS 2 gas sensor. More importantly, attributing to the irradiation of UV can accelerate the desorption of water molecules, WS 2 /PbS heterostructure based gas sensor manifests more stabilized anti-humidity performance with stable initial resistance and negligible response value drift (8.8%) in the range of 10%–90% relative humidity. Furthermore, UV-assisted WS 2 /PbS gas sensor also possesses prominent sensing performances including high sensitivity, low detection limit (∼20 ppb), favorable selectivity and outstanding long-term stability. This research will pave the way on designing high-performance TMDs-based gas sensors operating at room temperature.
研究领域:
材料科学
·
纳米科技
·
传感器技术
·
环境监测
·
半导体物理
·
表面化学
·
光电子学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Yi Xia,Lei Xu,Sufang He,Liexing Zhou,Mingjun Wang,Jing Wang,Sridhar Komarneni
2D Transition metal dichalcogenide (TMDs) has been recognized as a potential candidate for constructing wearable and safe room temperature gas sensor. Especially, the heterostructures of TMDs/ metal oxide semiconductors (MOS) have been proved to be potential candidates as NO 2 sensors at room temperature. However, the response/recovery rate and reversibility of the sensors is still not satisfactory due to the inefficient charge transfer on TMDs/MOS hetero-interface. In this study, SnO 2 quantum dots (QDs) were simply decorated on the surface of few or single layer WS 2 nanosheets to form 2D/0D heterostructures via a facile room temperature aqueous solution process and self-assembly method. The 2D/0D WS 2 /SnO 2 heterostructure-based optoelectronic gas sensor showed fast response/recovery rates and full reversibility to NO 2 at room temperature with enhanced response. The remarkable improvement in NO 2 sensing was because of the efficient interfacial charge separation rendered by 2D/0D heterostructures under ultraviolet illumination. Therefore, this study points out a potential strategy for the design of light-enhanced gas sensing materials.
研究领域:
材料科学
·
纳米科技
·
传感器技术
·
半导体物理
·
环境监测
·
光电子学
✓ 已验证
DOI
高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2024
·
IF 1.7
Yan Jiaqi,Fu Weiwen,You Kuiyi,Zhao Fangfang,Luo He’an
A solvent-free, acid-free, and efficient strategy was developed for the selective preparation of 4-nitro-o-xylene (4-NOX) from the catalytic nitration of o-xylene with NO 2 mediated O 2 over BiCl 3 immobilized silicic acid catalyst (BiCl 3 -SA). The results indicated that the Lewis acid BiCl 3 -SA conjoined NO 2 –O 2 as a composite system synergistically promotes o-xylene conversion and 4-NOX selectivity. Under optimal conditions, 52.4% of o-xylene conversion with 68.4% 4-NOX selectivity was obtained at 35 °C. The characterization demonstrated that the highly dispersed metal Bi species form stable chemical bonds with the SA surface, which can effectively inhibit the loss of metal species and generate abundant acid sites. The developed catalyst is not only inexpensive but also has excellent stability and catalytic performance. Furthermore, a plausible mechanism for the catalytic nitration of o-xylene using NO 2 as a nitration agent over BiCl 3 -SA was proposed. This work provides an eco-friendly and practical protocol for improving desirable 4-NOX selectivity and reducing the discharge of acidic wastewater, with potential application prospects. Graphical abstract
研究领域:
催化化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xianjie Wang,Yaning Zhao,Hengsheng Wei,Yi Wang,Jingdong Gou,Jinhui He,Xue Ma,Louwei Cui,Liuyi Pan,Jiaojiao Liu,Dong Li
The separation of coal-derived C8 cyclohexane isomers, particularly cis-1,3-dimethylcyclohexane (cis-1,3-DMCH) and ethylcyclohexane (ECH), remains challenging due to their similar molecular structures and physicochemical properties, while research on cycloalkane isomer separation is limited. A series of functionalized UiO-66 derivatives (UiO-66, UiO-66-(CH 3 ) 2 , UiO-66-OH, and UiO-66-NO 2 ) were synthesized via solvothermal methods and systematically evaluated for their adsorption and separation performance toward C8 cyclohexane isomers through single-component and competitive batch adsorption experiments, dynamic breakthrough tests, and molecular simulations. Among the investigated materials, UiO-66-NO 2 demonstrated superior selectivity (α = 5.10) for cis-1,3-DMCH over ECH, with excellent regeneration stability over multiple cycles, significantly outperforming commercial activated carbons and zeolites. Mechanistic studies revealed that the enhanced selectivity arises from a dual mechanism combining geometric confinement effects and electronic recognition, where the oblate geometry and larger dipole moment of cis-1,3-DMCH enable preferential adsorption through strengthened C-H···O and C-H···NO 2 interactions, as confirmed by calculated binding energies (−37.15 kJ/mol for cis-1,3-DMCH vs. -22.13 kJ/mol for ECH) and diffusion coefficients. This work demonstrates rational MOF functionalization for efficient cycloalkane isomer separation, providing a promising strategy for coal-derived naphtha valorization.
✓ 已验证
产品关联
DOI
高影响因子
ACS Sensors
·
2025
·
IF 9.1
Xiao Ma,Rong Tan,Hong Chen,Jiawei Zhang,Lei Ge,Tingting Zhao,Xinyu Wang,Kaikai Yuan,Hairui Fang,Dong Wang
Nitrogen dioxide (NO2), the main component of pollutants in atmospheric environments, causes and exacerbates respiratory diseases, especially during outdoor sports even at the 100 ppb level. Currently, environmental gas detection still faces challenges such as high detection limits, low SNR, and low sensitivity. A NO2 sensor based on In(OH)3-α-Fe2O3–ZnO was prepared using a hydrothermal method, featuring an ultralow detection limit of 82 ppt, an exceptionally high SNR of 574,000, and an ultrahigh sensitivity of 252.25 mV/ppm (100 ppb to 1 ppm). And this sensor exhibits excellent response, selectivity, and repeatability. These excellent sensing characteristics come from the adsorbed oxygen on the surface of the material with the formation of n–n heterojunctions. Additionally, a low-power, portable, and cost-effective environmental monitoring system (named Smart Breath Sentinel (SBS)) was designed to intelligently upgrade ordinary masks. SBS enables real-time wireless environmental gas monitoring with integrated humidity compensation to ensure accurate measurements in high-humidity environments. SBS has already been tested in multiple environments, and the test results have proven the feasibility of SBS. This sensor based on In(OH)3-α-Fe2O3–ZnO demonstrates significant potential for applications aimed at enhancing human safety.
研究领域:
环境科学
·
材料科学
·
传感技术
✓ 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）