ATMOSPHERIC ENVIRONMENT
·
2026
·
IF 3.8
Linlin Ye,Yan Huang,Linfeng Zhang,Panya Xu,Jingjing Wang,Chengzhu Zhu,Tong Zhu,Mingjin Wang
Model simulations indicate that atmospheric acidification increases the solubility of phosphorus (P) in mineral dust, thereby altering primary productivity in many P-limited ecosystems. However, results from laboratory simulation studies are still lacking. We investigated the heterogeneous reaction between nitrogen dioxide (NO 2 ) and hydroxyapatite (HAP) using a flow reaction system. The results reveal the formation of nitrate products and an increase in the water solubility of P in HAP. Under conditions of 50 ppm NO 2 and 50% relative humidity, after 8 h of reaction, the reactive uptake coefficients calculated using geometric surface area and Brunauer–Emmett–Teller surface area were 1.61 × 10 −5 and 1.26 × 10 −9 , respectively. After 10 h of reaction, the water solubility of P was 3.61 times its pre-reaction value. Longer reaction times and higher NO 2 concentrations promote both greater NO 3 − formation and increased P dissolution. The mechanism for increased water solubility involves hydrogen ions (H + ) weakening calcium bonds, thereby enhancing the release of P from the HAP crystal surface. This study demonstrates that atmospheric heterogeneous reactions between HAP in mineral dust and acidic gases can enhance the water solubility of P, thus increasing its bioavailability. This enhancement partially alleviates P limitation in tropical rainforests and open-ocean ecosystems, boosting primary productivity in P-limited ecosystems. Primary production processes absorb and fix atmospheric CO 2 , which in turn influences the carbon cycle in P-limited ecosystems.
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Yingjie Li,Na Zhao,Yilin Chen,Jun Zhang,Xianghong Liu
For metal oxide semiconductor (MOS) gas sensors, achieving rapid and highly sensitive responses at room temperature (RT) remains a significant challenge. In this study, Ni-doped SnO 2 nanoparticles (NPs) were synthesized via a sol-gel method. The incorporation of nickel ions substantially enhanced the RT NO 2 sensing performance of SnO 2 . At an optimal doping concentration (5 at%), the SnO 2 NPs exhibited high sensitivity, excellent selectivity, and good stability, with a nearly 120-fold enhancement in sensor response. The excellent sensor performance can be attributed to the fact that when Ni 2 + enters the SnO 2 lattice and replaces Sn 4+ , it disrupts the defect balance in the SnO 2 lattice. The presence of Ni 2+ in the SnO 2 crystal captures free electrons in the sensitive material, forming oxygen ions and oxygen vacancies, which alters the defect balance of the gas-sensitive element and promotes the adsorption of NO 2 on the SnO 2 surface. This doping strategy effectively lowered the operating temperature of SnO 2 , enabling reliable NO 2 detection under RT conditions. Additionally, the experimental detection limit of the sensor reached as low as 100 ppb, far below the threshold of 200 ppb recommended by the American Conference of Governmental Industrial Hygienists (ACGIH). This work provides an effective sensitization strategy for developing RT gas sensors.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Jingxin Qi,Yu Chen,Yaru Liu,Runjia Xu,Kaifeng Xue,Lulu Du,Li Lv,Pinhua Zhang,Guangliang Cui
Bi-MOF-derived CuO/ZnO heterojunctions were made by ion exchange. • The sensor reaches 10 ppb detection and 5.08-fold higher response than ZnO. • It maintains a 6.38 response to 1 ppm NO 2 at −20 °C. • Quantitative NO 2 monitoring is demonstrated for precision agriculture. The development of miniaturized and portable NO 2 sensors for agricultural environments, capable of operating at low temperatures, is of great scientific significance and application value for improving nitrogen fertilizer utilization efficiency and preventing environmental pollution. ZnO/CuO heterostructures were prepared by employing bimetallic-based metal–organic frameworks (Bi-MOFs) as self-sacrificial templates for enhanced NO 2 sensing at room and lower temperatures in the field of precision agriculture applications. Our experiments reveal that the ZnO/CuO heterostructure calcined at 400 °C exhibits a response approximately 5.08 times that of pure ZnO. It delivers a response value of 7.78 toward 1 ppm NO 2 at 20 °C, with response and recovery times of 70 s and 150 s, respectively. Furthermore, it exhibits an excellent detection limit as low as 10 ppb toward NO 2 . Notably, even at − 20 °C, its response to 1 ppm NO 2 remains at 6.38. The excellent gas-sensing performance can be attributed to the synergistic contribution of the mesoporous structural advantages of MOF-derived MOS and heterostructures. This work provides promising research ideas and strategies for the application of Bi-MOF-derived MOS heterostructures in gas sensing. Download: Download high-res image (208KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2025
·
IF 7.3
Hongxing Yang,Wangjin Yang,Shiwei Lai,Fu Li,Shaojie Yang,Chong Han
The role of NO 2 in the heterogeneous photochemical formation of sulfates by SO 2 uptake on typical brown carbon (BrC) species (Fluoranthene, FL; 4-(benzoyl) benzoic acid , 4–BBA; 3,7-dihydroxy-2-naphthoic acid, 3,7–DHNA) was systemically explored in a flow tube reactor with the infrared spectroscopy , ion chromatography as well as theoretical calculation. NO 2 enhanced SO 2 uptake and sulfate generation on BrC under irradiation, as shown by larger steady-state uptake coefficients of SO 2 and sulfate formation rates. NO 2 − can be produced through the reduction of NO 2 by the photogenerated electrons on BrC, and it was proven to be the trigger that promoted the oxidation of SO 2 to sulfates. NO 2 − was more easily formed on FL, followed by 4−BBA and 3,7−DHNA, which can be evidenced by the energy barrier for NO 2 − production: FL (0.01 kJ mol −1 ) < 4−BBA (0.12 kJ mol −1 ) < 3,7−DHNA (1.33 kJ mol −1 ). SO 2 lifetimes and sulfate formation rates during the reaction of SO 2 /NO 2 with BrC were estimated to be 10.60–31.75 days and 0.02–0.04 μg m −3 h −1 , respectively.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Shupeng Sun,Xinlei Li,Nan Wang,Baoyu Huang,Xiaogan Li
The gas pollutant of Nitrogen dioxide (NO 2 ) can have a severe impact on human respiratory systems, with a potential threat to human health. Therefore, a NO 2 sensor is necessary to be implemented to have the information on exhaled low concentrations of NO 2 emitted from different sources. In this work, the tellurium nanotubes (Te NT) based heterojunction with SnO 2 nanoparticles (TeNT/SnO 2 ) for detecting ppb-level NO 2 at room temperature was developed. The TeNT /SnO 2 sensor exhibits a better response (25.3 %), and faster response time (32 s) to 600 ppb of NO 2 in comparison to pristine Te NT based sensors (7.9 % and 154 s). The promoted sensing properties including selectivity, signal repeatability, and long-term stability could be attributed to the formation of TeNT/SnO 2 heterojunctions. The density function theory (DFT) in accordance with the first principle was conducted to calculate the adsorption ability of the TeNT/SnO 2 heterojunctions. It indicates that the TeNT/SnO 2 heterojunctions facilitated the adsorption of oxygen (-0.635 eV) and NO 2 (-1.533 eV) in comparison to Te NT.
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
FOOD CHEMISTRY
·
2024
·
IF 8.5
Jing Zhang,Jing Chen,Jincen Zuo,Jingsha Lan,Zhilin Jiang,Chen Xiao,Xinhui Wang,Yong Zuo
Excess nitrites are potentially threatening to human health, so it is urgent to develop accurate and sensitive methods. The development of sensors can provide early warning of possible hazards and alert people to protect public health. This work presents an NiS x @MoS 2 -composite with excellent electrochemical activity, representing a key finding for highly sensitive NO 2 − detection and sensor development. With the assistance of NiS x @MoS 2 , this electrochemical sensor has excellent quantitative detection performance. It has a wide detection range (0.0001–0.0020 mg/mL) and a low detection limit (1.863*10 −5 mg/mL) for NO 2 − . This electrochemical sensor maintains excellent specificity among numerous interferences, and it completes the accurate detection of different real food samples. Pleasingly, the electrochemical sensor has satisfactory repeatability stability, and potential for practical applications. It would demonstrate tremendous potential in scientific dietary guidance, food safety detection and other fields.
研究领域:
分析化学
·
环境科学
·
食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sensors
·
2025
·
IF 9.1
Jingxin Qi,Runjia Xu,Yaru Liu,Kaifeng Xue,Lulu Du,Li Lv,Guangliang Cui,Pinhua Zhang
Developing miniaturized portable sensors for detecting NO2 at low temperatures in agricultural environments is crucial for enhancing nitrogen fertilizer utilization efficiency and preventing environmental pollution. This work successfully synthesized ZnO/MWCNT heterostructures using an in situ 2D electrodeposition method under direct current voltage, which demonstrated exceptional gas-sensing performance toward NO2 under both room and lower temperature conditions. The sensor demonstrates a 4-fold enhancement response to 10 ppm of NO2 compared to pristine ZnO sensors and exhibits a response of 98% to 1 ppm of NO2 at room temperature with a detection limit of 30 ppb. Even at −20 °C, it maintains a 5.1% response to 1 ppm of NO2. Notably, the unique nanosheet structure endows the heterostructure with reversible temperature sensing and high-temperature circuit-breaker characteristics, enabling the sensor to have the ability to alarm for temperatures above 50 °C. The incorporation of MWCNTs and the formation of the p–n heterojunction play a synergistic role in enhancing the gas-sensing performance. Moreover, we successfully detected NO2 emissions from nitrogen fertilizers using the ZnO/MWCNT heterostructure sensor, demonstrating its potential for integration with Internet of Things (IoT) technology to enable intelligent agricultural monitoring.
研究领域:
材料科学
·
环境传感
·
农业技术
·
纳米技术
·
物联网（IoT）
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2023
·
IF 4.3
Ying Qi,Huihui Xie,Jijian Liu,Xiaojuan Fu,Mengjie Lu,Min Liu,Salman Riaz,Peng Wei,Yahong Xie
Nitrite (NO 2 - ) in water and food is a potential threat to the environment, human health, and other living organisms. Therefore, the detection of NO 2 - is highly essential. Herein, a simple and fast colorimetric method for NO 2 - detection is realized based on the etching of non-modified gold nanobipyramids (Au NBPs), which results in the blue-shift of longitude local surface plasmon resonance (LSPR) peak and obvious color changes. The NO 2 - was detected through this method with a linear response ranging from 2.0 to 20 μM, a limit of detection (LOD) of 0.17 μM and a naked eye LOD of 6.0 μM under the optimal conditions. The LOD is sufficiently for the detection of NO 2 - in food in real life applications. During the detection, the morphology of Au NBPs generally changes from the bipyramid shape to the rice shape, and then to the final spheroid shape with increasing NO 2 - concentration. The feasibility of this method was verified in real samples with good recovery. Compared with other methods, this colorimetric sensor has advantages such as its low cost, excellent sensitivity and selectivity, and the most importantly, it can be applied to visually detect NO 2 - .
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 9
·6713-6718
·
IF 3.201
Qiqi Sun,Weigang Feng,Pu Yang,Guoqiang You,Yanli Chen
A new n-type 2(3),9(10),16(17),23(24)-tetrakis(2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-pentadecafluorooctyloxy)phthalocyanine H2[Pc(OCH2(CF2)6CF3)4] (1) is designed and synthesized. The introduction of electron-withdrawing pentadecafluorooctyloxy chains onto the peripheral positions of the phthalocyanine macrocycle successfully realizes the n-type organic semiconducting nature of the compound. Two kinds of films are fabricated by simple drop-casting (DC) and vacuum deposited (VD) methods, respectively. Examination by spectroscopic methods and morphology observation revealed that H2[Pc(OCH2(CF2)6CF3)4] molecules in the DC film adopt the J aggregation mode, whereas those in the VD film adopt the H aggregation mode, with the increasing molecular stacking order of DC < VD films. Moreover, these two types of films are used for low concentrations of NO2 detection. The highly sensitive n-type responses to NO2 gas in the range of 100 ppb to 1 ppm are obtained within a dynamic exposure period of 1 min at room temperature. Depending on the favorable hydrogen bonding between the analytes and the fluoroalkoxy groups or phthalocyanine core of compound 1, excellent selectivity for electrophilic NO2 against electrophobic NH3 and H2S is achieved successfully. The responses of the compound in the DC and VD films are all linearly correlated to the NO2 concentration from 100 ppb to 1 ppm with a significant increase in sensitivity from 7.54% ppm−1 for the former to 12.05% ppm−1 for the latter. The present work not only implies the great potential of the fluoroalkoxy-substituted phthalocyanine derivatives in the field of chemical sensors, but more importantly provides a new strategy through the elaborate molecular design combined with a suitable film fabrication technique to obtain ultrasensitive and selective sensors for the detection of trace amounts of gas.
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 16
·2289
·
IF 5.3
Zhenyu Wang,Haizhen Ding,Xuefeng Liu,Jing Zhao
Semiconductor oxide gas sensors have important applications in environmental protection, domestic health, and other fields. Research has shown that designing the morphology of sensitive materials can effectively improve the sensing characteristics of sensors. In this paper, by controlling the solvothermal reaction time, a unique hexagonal flower-like structure of In2O3materials consisting of cuboid nanorods with a side length of 100–300 nm was prepared. The characterization results indicated that with the increase in reaction time, the materials exhibited significant morphological evolution. When the solvent heating time is 5 h, the flower-like structure is basically composed of hexagonal nanosheets with a thickness of several hundred nanometers and a side length of several micrometers. With the increase in reaction time, the apex angles of the nano sheets gradually become obtuse, and, finally, with the Ostwald ripening process, they become cuboid nanorods with side lengths of 100–300 nanometers, forming unique micro-flowers. Among them, the material prepared with a reaction time of 20 h has good sensing performance for NO2, exhibiting low operating temperature and detection limit, good selectivity, repeatability, and long-term stability, thus suggesting a good application prospect.Keywords:In2O3;micro-flowers;morphological evolution;NO2sensor;solvothermal
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Chemosensors
·
2023
·Vol. 11
·期 4
·252
·
IF 4.2
Zhixiang Hu,Licheng Zhou,Long Li,Binzhou Ying,Yunong Zhao,Peng Wang,Huayao Li,Yang Zhang,Huan Liu
Colloidal quantum dots (CQDs) are gaining increasing attention for gas sensing applications due to their large surface area and abundant active sites. However, traditional resistor-type gas sensors using CQDs to realize molecule recognition and signal transduction at the same time are associated with the trade-off between sensitivity and conductivity. This limitation has restricted their range of practical applications. In this study, we propose and demonstrate a monolithically integrated field-effect transistor (FET) gas sensor. This novel FET-type gas sensor utilizes the capacitance coupling effect of the CQD sensing film based on a floating gate, and the quantum capacitance plays a role in the capacitance response of the CQD sensing film. By effectively separating the gate sensing film from the two-dimensional electron gas (2DEG) conduction channel, the lead sulfide (PbS) CQD gate-sensitized FET gas sensor offers high sensitivity, a high signal-to-noise ratio, and a wide range, with a real-time response of sub-ppb NO2. This work highlights the potential of quantum dot-sensitized FET gas sensors as a practical solution for integrated gas sensor chip applications using CQDs.Keywords:colloidal quantum dot;PbS;FET-type gas sensor;ligand exchange;capacitance
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 39
·2203528
·
IF 19.924
Qiuni Zhao,Wenzhe Zhou,Mingxiang Zhang,Yang Wang,Zaihua Duan,Chaoliang Tan,Bohao Liu,Fangping Ouyang,Zhen Yuan,Huiling Tai,Yadong Jiang
Endowed with rich terminal groups, good electrical conductivity, and controllable structure, transition metal carbides/nitrides (MXenes) have attracted extensive attention for potential application in gas sensor, but long-standing challenges of the MXenes (titanium carbide as the representative) are their limited selectivity and sensitivity. Herein, a high-active double transition-metal titanium molybdenum carbide (Mo 2 TiC 2 T x ) with superstrong surface adsorption (−3.12 eV) for NO 2 gas molecule is proposed, and it is further coupled with molybdenum disulfide (MoS 2 ) by interface modulation to construct an edge-enriched heterostructure. Due to the synergistic effect of strong adsorption, rich adsorption sites, and coupling interface of Mo 2 TiC 2 T x /MoS 2 composite, the as-fabricated Mo 2 TiC 2 T x /MoS 2 gas sensor exhibits an outstanding response toward NO 2 with high selectivity against various interference gases, which is well supported by density functional theory calculations. Meanwhile, the sensor exhibits a sensitivity of 7.36% ppm −1 , detection limit of 2.5 ppb, and reversibility at room temperature. A portable, wireless NO 2 monitoring system is demonstrated for gas leakage searching and dangerous warning based on Mo 2 TiC 2 T x /MoS 2 gas sensor. This work facilitates the gas sensing application of MXenes, and provides an avenue for the development of wireless sensing system in environmental monitoring and safety assurance.
✓ 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）