ACS Nano
·
2025
·
IF 16
Ou Wang,Zhiheng Ma,Zhenggang Xue,Muyu Yan,Bao-Li An,Yongmei Zhao,Jiaqiang Xu,Xiaohong Wang
Enhancing the gas-sensing properties of metal oxide semiconductors using noble metals’ electronic and chemical sensitization functions is a common approach to develop high-performance gas sensors. However, the high cost and scarcity of noble metals pose challenges to sustainability. In this study, a non-noble metal MnFeCoNiCu high-entropy alloy (HEA) was designed as an alternative to noble metals to enhance the sensitivity of SnO2 and enable efficient, stable, and rapid detection of acetone (C3H6O). The MnFeCoNiCu HEA-loaded SnO2 demonstrated improved performance in C3H6O detection, including high selectivity (κ > 3), a high sensitivity (Ra/Rg = 4.17 at 0.5 ppm), a low detection limit (30 ppb), fast response and recovery time (4.6 s/5 s), long-term stability (over 50 days), and resistance to humidity (stable at 90% RH). The enhanced performance of the HEA is attributed to the fact that it possesses more valence electrons and the electrons can transfer and redistribute among different atoms, which leads to an increase in active oxygen species and catalytic sites, promoting electron sensitization. This study provides insights into designing and developing a highly catalytic, non-noble metal HEA for gas-sensing applications.
研究领域:
材料科学
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传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Dandan Liu,Xueyan Li,You Li,Shu Yin,Jiajia Liu,Jiatao Zhang
Highly sensitive and selective gas sensors hold great potential in disease diagnosis. However, the rational design of non-noble-metal-based, high-efficiency sensing materials for trace gas detection remains a crucial challenge. Herein, a chemiresistive sensor that can detect parts per billion (ppb)-level acetone was realized based on three-dimensional (3D) α-Fe2O3/ZnO nanocages, which were achieved by a simple encapsulation and calcination process. In particular, we found that Fe species play an intriguing role in the evolution from Fe-ZIF-8 to heterogeneous α-Fe2O3/ZnO nanocages. α-Fe2O3 functionalization empowered the α-Fe2O3/ZnO nanocage-based sensor with a high response of 45.25, an ultrafast response (7 s) and recovery (6 s) time toward 50 ppm of acetone, a limit of detection (LOD) of 500 ppb, and superior selectivity. Moreover, in situ Fourier transform infrared analysis allowed one to devise of an acetone sensing mechanism for dissociative acetone adsorbed on the α-Fe2O3/ZnO nanocages, involving the first oxidation of acetone to form formate and acetate complexes, followed by further oxidation to CO2 and H2O. The enhanced acetone sensing performance can be attributed to the high specific surface area, abundant oxygen vacancies, well-tuned heterojunction, and optimal acid–base property.
研究领域:
材料科学
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分析化学
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生物医学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2020
·Vol. 31
·期 19
·16539-16547
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IF 2.22
Li Jian,Chen Chen,Li Jialin,Li Shijun,Dong Chengjun
Tin-glycerate (Sn-Gly) spheres were synthesized through a simple solvothermal strategy, which was further thermally converted into SnO 2 . It is found that the loose SnO 2 spheres have been built up from nanoparticles with about 10 nm in size. The use of such SnO 2 nanostructures was further performed for low-ppm-level acetone detection. The results showed that the SnO 2 presented response of 123 to 100 ppm acetone vapor at 260 °C. The sensor also exhibited rapid response/recovery time (24.5 s/6.5 s), low detection limit (1.5 at 1 ppm), excellent selectivity, and good reproducibility. Especially, a good linearity ranging from 1 to 100 ppm acetone was fitted, making it a promising candidate for acetone detection.
研究领域:
材料科学
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化学传感器
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2018
·Vol. 215
·期 14
·1800100
·
IF 1.795
Xinxin Xing,Nan Chen,Yue Yang,Rongjun Zhao,Zhezhe Wang,Zidong Wang,Tong Zou,Yude Wang
A facile hydrothermal method is used to prepare Pt-functionalized nanoporous TiO 2 nanoparticles. These are used as gas-sensing material in sensors, fabricated according to the indirect heating method. Gas-sensing performance of the sensors is investigated by testing their gas response to acetone, which exhibits favorable selectivity, good gas response value, fast response/recovery time, low detection concentration and good long-term stability to acetone. Gas response β was defined as the ratio of R a /R g , where R a and R g are the resistance values of gas sensor exposed in air and objective gas, respectively. Among all these as-prepared gas sensors, the 0.5% Pt-functionalized TiO 2 based gas sensor shows the highest gas response value of 29.51–200 ppm acetone at 300 °C, and the gas response value is 5.2 times higher than that (5.67) of pure TiO 2 based gas sensor. It also has excellent selectivity to acetone when comparing with toluene, n-butanol, isopropanol, ethanol, and methanol. The large specific surface area (168.101 m 2 g −1 ) provides enough contacting interface between gas and the as-prepared materials, then the gas molecules could be broken into CO 2 and H 2 O by the active adsorbed oxygen species. The present results of the Pt-functionalized TiO 2 based gas sensors illustrates their potential application in detecting acetone.
研究领域:
材料科学
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传感器技术
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Jinyu Huang,Jiaxi Zhou,Zhenhua Liu,Xuejin Li,Youfu Geng,Xiaoqing Tian,Yu Du,Zhengfang Qian
ZnO nanorods doped by different amount of Au and Pd were successfully synthesized via one-step microwave-assisted hydrothermal method. The structure, morphology and composition of the as-synthesized products were characterized by X-ray diffraction (XRD), field-emission electron microscopy (FESEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Gas sensors based on ZnO and Au/Pd-doped ZnO nanorods were fabricated and their gas sensing properties were tested for various gases. The results indicate that the incorporation of Au and Pd elements can greatly enhance the gas sensing properties of ZnO sensors. Specifically, the sensor based on 2.0 wt% Au-doped ZnO exhibits the highest response, quickest response and recovery characteristics, best selectivity, low operating temperature, as well as good long-term stability towards acetone. After incorporation of Au (2.0 wt%), the detection limit of Au-doped ZnO sensor decreases to 5 ppb and the response increases to 17 under 1 ppm acetone at 150℃, which is more than triple the responses of ZnO sensor. The results demonstrate that the developed Au-doped ZnO sensor has great potential for ppb-level acetone detection in human breath for diagnosing diabetes.
研究领域:
材料科学
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医学
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传感技术
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Xiangjian Liao,Xingyu Liu,Yilu Wu,Longxin Qian,Yonglin Chen,Yifei Wang,Zixuan Wu,Aiping Huang,Xianzhe Liu,Jianyi Luo
To achieve non-invasive diabetes diagnosis through breath analysis, it is of great significance to construct a metal oxide acetone gas sensor with high sensitivity, selectivity and a low detection limit. Utilizing spinel ferrite materials with matching crystal structures to form high-quality heterojunctions can significantly enhance metal oxide sensing performance. Herein, a feasible strategy for constructing heterojunction composites using lattice-matched metal oxides, specifically inverse spinel NiFe 2 O 4 and normal spinel ZnFe 2 O 4 , was proposed to enhance the catalytic activity of acetone oxidation. By substituting Zn into NiFe 2 O 4 at the A-site and adjusting the Ni/Zn molar ratio, the synergistic effect of the heterojunction could be successfully implemented to enhance the detection of acetone. Notably, the optimal Ni 0.6 Zn 0.4 Fe 2 O 4 sensor exhibited remarkable acetone-sensing performance with a high response of 13.77 at 1 ppm, a detection limit as low as 20 ppb (theoretically as low as 171 ppt), strong humidity adaptability, a fast response time of 17 s at 1 ppm, exceptional selectivity, and long-term stability. In practical applications, the Ni 0.6 Zn 0.4 Fe 2 O 4 sensor was able to distinguished between acetone levels in the breath of healthy individuals and simulated diabetes patients, thereby suggesting their potential for auxiliary diabetes diagnosis. The results imply that normal/inverse spinel ferrite heterojunction composites could offer a novel strategy for effective acetone detection in breath analysis for the diagnosis of diabetes.
研究领域:
材料科学
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医学诊断
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Sensors
·
2022
·
IF 9.618
Ning Sui,Xiao Wei,Shuang Cao,Peng Zhang,Tingting Zhou,Tong Zhang
As the most widely used gas sensors, metal oxide semiconductor (MOS)-based chemiresistors have been facing great challenges in achieving ppb-level and selective detection of the target gas. The rational design and employment of bimetallic nanocatalysts (NCs) are expected to address this issue. In this work, the well-shaped and monodispersed AuPt NCs (diameter ≈ 9 nm) were functionalized on one-dimensional (1D) In2O3 nanofibers (NFs) to construct efficient gas sensors. The sensor demonstrated dual-selective and ppb-level detection for ozone (O3) and acetone (C3H6O) at different optimal working temperatures. For the possible application exploitation, a circuit was designed to monitor O3 concentration and provide warnings when the concentration safety limit (50 ppb) was exceeded. Moreover, simulated exhaled breath measurements were also carried out to diagnose diabetes through C3H6O concentration. The selective detection for O3 and C3H6O was further analyzed by principal component analysis (PCA). The drastically enhanced sensing performances were attributed to the synergistic catalytic effect of AuPt NCs. Both the “spillover effect” and the Schottky barrier at the interfaces of AuPt NCs and In2O3 NFs promoted the sensing processes of O3 and C3H6O.
研究领域:
材料科学
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环境科学
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医学诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER BULLETIN
·
2022
·Vol. 80
·期 7
·7519-7532
·
IF 2.843
Ma Yuan,Li Wen-Xia,Duan Li-Jun,Wang Li-An,Wu Yong-Gang
A new inorganic-organic hybrid heterometallic compound, namely {[(CH 3 ) 2 NH 2 ][CdNa(4,4′-bpdc) 2 ]} n ·6n(H 2 O) ( 1 , 4,4′-H 2 bpdc is 4,4′-biphenyldicarboxylic acid), was synthesized through the solvothermal self-assembly reactions of 4,4′-H 2 bpdc ligand in combination with Cd(II) and Na(I) salts. importantly, compound 1 shows high selectivity and sensitivity for the detection of acetylacetone (Hacac) molecule with a high K sv value of 11.667 nM −1 . Its prevention activity on osteoarthritis after the reconstruction of anterior cruciate ligament was investigated and the associated mechanism was analyzed. At first, the enzyme linked immunosorbent assay (ELISA) detection was implemented in the current research to detect the Interleukin-1β (IL-1β) and Interleukin-1β (IL-18) content released into joint cavity after treated with the compound. The results showed that this complex was good at inhibiting the IL-1β and IL-18 content released into joint cavity. The real time reverse transcription-polymerase chain reaction (RT-PCR) was carried out and the nuclear factor kappa-B (NF-κB) signaling pathway activation in joint soft tissue was tested exploiting real time RT-PCR. The real time RT-PCR exhibited that the NF-κB signaling pathway activation in the joint soft tissue was significantly reduced by the new compound. Subsequently, the levels of cartilage tissue cell apoptosis were also tested through Annexin V-FITC Apoptosis detection, and the results suggested the cartilage tissue cell apoptosis levels were obviously reduced by the compound.
研究领域:
材料科学
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生物医学
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化学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Min Ma,Lin Peng,Jiayi Li,Yunfei Zhang,Zihan Wang,Jian Bi,Daojiang Gao,Jiangtao Wu
Despite being difficult to control and identify, extremely dilute oxygen vacancies that are generally present in metal oxides have been widely reported to play an important role in tuning the performance of gas sensors. The conventional methods of oxygen vacancy regulation, i.e., oxygen vacancy engineering, require sophisticated equipment and complex procedures while being time/energy-consuming. Beyond that, the mechanisms underlying sensing properties and oxygen vacancies have not been well understood for a long time, in particular, lack quantitative relationship. An open and important question is whether and to what extent the enhanced sensing properties can be attributed only to oxygen vacancies. In this study, a facile one-step “shake and heat” treatment that simply consists of mixing the metal oxide with carbohydrate and then heating the mixture is employed to prepare controllable oxygen-vacancy hematite . The oxygen vacancy concentration of hematite is measured by a gravimetric method. The oxygen vacancy-rich hematite shows superior sensing properties toward acetone compared to the raw materials and traditional argon annealed samples. There is a 220% increase in response when the oxygen vacancy concentration reaches 1.6% and a 74% increase when the oxygen vacancy concentration is 0.4%. The enhanced sensing properties are proven to be attributed only to the oxygen vacancies in hematite by the subsequent oxygen annealing experiment. Our study provides a simple and effective synthesis strategy to prepare high-performance oxygen vacancy-rich metal oxide sensors as well as a semiquantitative relationship between sensing performance and oxygen vacancies.
研究领域:
材料科学
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传感器技术
·
无机化学
·
功能材料
·
分析化学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Ya Xiong,Xiao Chang,Xurong Qiao,Kun Li,Lei Zhu,Fujun Xia,Xiaofang Li,Qingbin Zheng,Wei Xing,Qingzhong Xue
For the first time, Co-MOF-74 derived Co 3 O 4 /graphene heterojunction nanoscrolls (Co 3 O 4 /GNS) structure is synthesized by a simple one-step hydrothermal strategy and subsequent calcination process. Theoretically, the growth mechanism of Co 3 O 4 /GNS is revealed by molecular dynamic simulation, demonstrating that a high loading of Co-MOF-74 nanoparticles is needed for effective rolling of GO. The sensor based on Co 3 O 4 /GNS exhibits high response of 58.1 (34-fold enhancement compared with that of Co 3 O 4 ), short response/recovery time of 12 s/66 s (157 s/200 s for Co 3 O 4 ) toward 1 ppm acetone at 190 °C and superior selectivity, which are much better than those of most reported acetone sensors. Moreover, the Co 3 O 4 /GNS can even detect as low as 50 ppb acetone with a notable response (1.24). The appreciable response together with rapid response/recovery of Co 3 O 4 /GNS is attributed to the large heterojunction interface between Co 3 O 4 and graphene nanoscroll and high-speed gas transfer pathways provided by nanoscroll. This unique structure design is believed to offer guidance for generalizable synthesis of metal oxide/GNS that can be effectively applied in the fields of ppb-level gas detection.
研究领域:
材料科学
·
化学传感器
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Jiahui Lin,Boyan Fu,Leyao Bi,Jiaxing Fu,Junsheng Wen,Binglin Zou,Chunjie Wang,Yue Wang
In this study, CuO nanosheet composites synergistically modified with graphene oxide (GO) and water bath treatment were prepared via a hydrothermal method, which were then explored for the acetylacetone gas sensing capabilities. The response of the CuO/GO-0.4 (70 °C) to 100 ppm acetylacetone is 39.29 at 175 °C, which is 16 times greater than pure CuO, and it achieves a rapid response time of 24 s and shortens the recovery time to 38 s. Moreover, the CuO/GO-0.4 (70 °C) sensor displays remarkable selectivity, repeatability, and long-term stability over a 28-day period. The electronic band structure and density of states for both CuO and CuO/GO were calculated by first-principles calculation. An in-depth discussion of the gas-sensing mechanism towards acetylacetone was provided, highlighting the role of graphene oxide in enhancing charge carrier transport and the increased concentration of oxygen vacancy (O v ) defects in the composite material. This study not only advances the field of gas sensors but also offers a promising route for detecting acetylacetone, which is critical in various industrial and environmental applications.
研究领域:
材料科学
·
纳米技术
·
传感器
·
表面科学
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Fengdong Qu,Tiju Thomas,Bingxue Zhang,Xinxin Zhou,Shendan Zhang,Shengping Ruan,Minghui Yang
Hollow nanostructures derived from metal-organic frameworks have attracted considerable interest for prospective applications in gas separation/storage, drug delivery, catalysis device and gas sensors. Herein, porous hollow nanostructures, namely Co 3 O 4 /ZnCo 2 O 4 composite hollow nanostructures, are prepared through a self-sacrificing template method. The method includes the synthesis of zeolite imidazolate frameworks-67 self-sacrificing template and then transformation into Co/Zn-ZIF@Co-Zn layered double hydroxides precursor. Finally, the Co 3 O 4 /ZnCo 2 O 4 composite hollow nanostructures are obtained through thermal annealing of Co/Zn-ZIF@Co-Zn LDH precursor in air. The gas sensing investigations revealed that the Co 3 O 4 /ZnCo 2 O 4 composite hollow nanostructures-based gas sensor exhibited high response (16.3–100 ppm) and selectivity towards acetone. Besides, enhanced gas sensing properties of Co 3 O 4 /ZnCo 2 O 4 composite hollow nanostructures are observed when compared with Co 3 O 4 and ZnCo 2 O 4 hollow nanostructures. The excellent gas sensing characteristics of Co 3 O 4 /ZnCo 2 O 4 composite hollow nanostructures might be attributed to their high porosity, large specific surface area, and heterostructure between Co 3 O 4 and ZnCo 2 O 4 .
研究领域:
材料科学
·
纳米技术
·
气体传感
·
功能材料
·
化学传感器
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）