SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Zhendong Ma,Zhijia Cui,Shunxiang Wang,Zhicheng Lin,Jiying Wei,Yongjin Zou,Lixian Sun,Heinz-Bernhard Kraatz,Cuili Xiang
The development of highly efficient room-temperature ammonia (NH 3 ) sensors is crucial for industrial production and environmental monitoring. However, existing materials generally face critical challenges, including insufficient sensitivity, humidity susceptibility, and limited charge-transfer efficiency. In this study, a synergistic strategy combining electronic structure modulation with heterointerface engineering was employed to fabricate a 2D/1D heterojunction sensing material composed of S-doped WSe 2 @polyaniline (PANI). The electronic band structure was optimized by substituting S atoms into Se sites within the WSe 2 lattice, and in situ oxidative polymerization was used to achieve vertical growth of PANI nanorods on the surface of S-WSe 2 , which significantly enhanced the gas-sensing performance of the composite. The S-WSe 2 @PANI sensor exhibited a remarkable response of 505.75 % to 100 ppm NH 3 at 25 °C and 45 % relative humidity (RH), representing 7.44-fold and 5.32-fold increases compared with pure WSe 2 and PANI sensors, respectively. The sensor also demonstrated an ultra-low theoretical detection limit of 170.31 ppb and excellent moisture resistance (with a response of 857.63 % to 100 ppm NH 3 at 80 % RH). Density functional theory (DFT) calculations revealed that the S-WSe 2 @PANI heterostructure possessed stronger NH 3 adsorption capability, while the work-function difference at the PANI/S-WSe 2 interface effectively promoted charge transfer. This study integrates electronic structure regulation and morphological synergy design strategies to establish an innovative paradigm for high-performance room-temperature NH 3 sensors with substantial potential for application in complex environmental monitoring scenarios.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Haixia Mei,Jingyi Peng,Tao Wang,Bowei Zhang,Fuzhen Xuan
Although current unsupervised domain adaptation (UDA) methods enable knowledge transfer without labeled data, their performance in regression tasks is often hindered by noisy pseudo-labels in the target domain. This challenge is particularly pronounced in gas concentration prediction, which demands higher label accuracy than classification tasks, yet lacks systematic research. To address this issue, this study proposes a novel semi-supervised cross-domain regression framework named Online-Teacher Domain-Adaptive Regression Network (OT-DARN) for accurate multi-gas concentration estimation. OT-DARN integrates an online teacher-student architecture that incorporates domain adversarial learning, along with a pseudo-label selection mechanism, to enhance both transferability and generalization. Extensive experiments on 15 commercially available gas sensor datasets demonstrate that OT-DARN achieves state-of-the-art performance with a minimum mean absolute error (MAE) of 0.7769 parts per million (ppm) under n-propanol concentrations of 10–100 ppm at (50 ± 10) % relative humidity and a temperature of (25 ± 2) °C, with a maximum R² of 0.9986 while reducing the labeling cost by 70 %. Even under fully unlabeled settings, the model achieves an MAE of 6.1206 and R² of 0.9317. Furthermore, bidirectional transfer experiments reveal no statistically significant differences between migration directions, validating its robustness. OT-DARN also consistently outperforms four representative UDA methods across various source–target combinations. Ablation studies further confirm the individual and joint contributions of key modules. This work pioneers semi-supervised cross-domain regression for gas concentration prediction and offers a cost-efficient, high-precision solution applicable to real-world sensing scenarios.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Teng-Long Zhou,En-Kang Wu,Jia-Kang Wu,Tian Qiang,Xiao-Feng Gu,Ming-Yang Yan,Svetlana von Gratowski,Jun-Ge Liang
Traditional microwave gas sensors have been widely used for gas detection at room temperature due to the advantages of high sensitivity and multi-parameter detection. However, the detection results can be significantly affected by the change of humidity, which restricts their application in practical environments. To solve this problem, a microwave gas sensor based on SnO 2 /Co 3 O 4 composite nanofibers, a micro-heater and a dual-mode resonator was proposed, achieving high-precision measurement of acetone within the range of 10~500 ppm. The integration of micro-heater can reduce water molecule adsorption, leading to enhanced sensing stability under varying humidity levels. The results demonstrate that the construction of SnO 2 /Co 3 O 4 heterostructures can enhance the sensitivity due to increasing charge transfer capability. The maximum sensitivity reached 3.938 mdB/ppm at the optimal operating temperature of 150 ℃, which is approximately five times higher than that of room temperature conditions. Moreover, the sensitivity of the microwave gas sensor maintains almost unchanged under different humidity, which can be attributed to the integration of micro-heater. This work provides a novel strategy for the design of microwave gas sensors in practical environments.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
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IF 8.1
Tingsheng Ren,Liying Liu,Yaxin Jing,Meixin Dou,Jian Wang,Xu Chen,Zhe Wang,Peng Gao,Guoping Hu,Eric F. May
Excessive emissions of carbon dioxide (CO 2 ) are a major driver of global warming. Blast furnace gas (BFG) represents a major source of CO 2 emissions in the steel industry, accounting for approximately 30 % CO 2 emissions among the industry sectors. Hence, effective CO 2 capture from BFG is imperative. This study presents an approach utilizing the vacuum swing adsorption (VSA) technology to capture CO 2 from BFG. A 6-column VSA rig was designed and constructed to separate CO 2 from a simulated BFG (CO 2 /N 2 = 20 %/80 %) using zeolite 13X as adsorbents. The VSA process involved steps of adsorption, desorption, heavy product purge, light product re-pressurization, and pressure equalization. Five different process modes, i.e., 1-column and 3-step, 2-column and 6-step, 2-column and 8-step, 3-column and 9-step, and 4-column and 16-step configurations, were implemented to evaluate the influence of various process design factors on the separation performance. Additionally, a 6-column and 36-step process was devised to conduct a parametric study of VSA cycles by varying the adsorption duration and desorption pressure. Results revealed the pivotal role of heavy product purge and pressure equalization on the separation performance. The six-column process achieved a CO 2 purity and recovery of 94 % and 82 %, respectively, with a energy consumption of 0.76 GJ/tonCO 2 when employing a desorption step duration of 240 s and pressure of 8 kPa. In addition, a method of process optimization based on the bed capacity ratio, C, was introduced in this study, which provides a dimensionless quantity of the utilization of the adsorption column. Moreover, capturing CO 2 from BFG through the VSA cycle not only enhances its heating value but also yields substantial advantages in terms of mitigating CO 2 emissions.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yan-nan Wang,Jin Li,Zhenyu Yuan,Fanli Meng
An optical fiber toluene gas sensor working at room temperature is proposed based on CQDs@SiO 2 (-OH) porous film. The CQDs@SiO 2 (-OH) porous film was elaborated on the surface of the hollow core fiber (HCF) using the templating method, where the evanescent field is excited by a misaligned structure. The precursor solution formed by mixing CQDs with SiO 2 (-OH) enhances CQDs dispersion within the film, preventing aggregation and preserving active sites. Experimental results indicate that the gas-sensitive layer doped with CQDs demonstrates a sensitivity of 5.1 pm/ppm to toluene gas at room temperature, which is approximately 3.13 times greater than that of the SiO 2 (-OH) porous film. Additionally, it demonstrates a response time of 12 s and a limit of detection (LOD) of 3.9 ppm. The gas sensing mechanism is thoroughly investigated using DFT, exploring the electronic distribution of the gas-sensitive layer before and after CQDs doping and analyzing the sensitization mechanism. This study presents a novel approach for toluene gas detection at room temperature using an optical fiber sensor.
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高影响因子
BIOMATERIALS
·
2025
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IF 12.9
Rui Hu,Xin Jiang,Lijie Zhu,Rui Meng,Rongbo Yang,Wenjie Sun,Zhenzhou Zhao,Yuehua Lyu,Ruoyuan Huang,Fei Xue,Mengke Shi,Zaigang Zhou,Jianliang Shen,Congying Xie
Currently, certain lung cancer patients exhibit resistance to radiotherapy due to reduced DNA damage under hypoxic conditions and the cytoprotective and immune-resistance effect caused by increased programmed death ligand-1 (PD-L1) and Cyclooxygenase 2 (COX-2) expression after radiotherapy. At present, existing nanoparticles or drugs could hardly effectively, and easily address these obstacles faced by highly effective radiotherapy simultaneously, especially the simultaneous depression of PD-L1 and COX-2. In this study, it is newly proved that some typical nitric oxide (NO) gas donors could co-inhibit PD-L1 and COX-2 expression, revealing the possible not fully proven role of NO in reversing tumor immunotherapy resistance. Then, to realize selective NO generation in tumors, a simple tumor glutathione (GSH) responsive NO gas nanogenerator named SAB-NO nanoparticles was designed and prepared, which was composed of the NO donor Isoamyl Nitrite conjugated with serum albumin (SAB). By doing this, SAB-NO nanoparticles more effectively sensitized radiotherapy through breaking the cytoprotective effects faced by radiotherapy in vitro by generating more DNA damage through reversing tumor hypoxia and impairing the DNA damage repair process through decreasing PD-L1 expression. Then, the combination therapy of SAB-NO nanoparticles and radiotherapy effectively transformed cold tumors into hot ones through avoiding some potential immune-resistance effects induced by radiotherapy treatment alone through PD-L1 and COX-2 co-inhibition. In conclusion, the combined treatment of radiotherapy and SAB-NO nanoparticles finally almost completely suppressed the growth of lung tumors, revealing the novel role of NO donors in sensitizing tumor immunotherapy by avoiding the potential cytoprotective and immune-resistance effects.
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DOI
PubMed
高影响因子
Materials Today Chemistry
·
2025
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IF 6.7
Shouyu Lu,Lei Sun,Shun Liu,Ping He,Jiang Wu,Mei Ma,Yang Ling,Hong Yao,Guangqian Luo,Dapeng Wang
A Fe 2 O 3 /CaSiO 3 composite adsorbent was synthesized using calcium nitrate as a precursor for the adsorption and removal of As 2 O 3 from high-temperature flue gas at temperatures ranging from 1073 K to 1273 K. A combination of experimental investigations and theoretical calculations was employed to analyze the impact of Fe-doped calcium silicate on its arsenic adsorption performance, as well as to elucidate the adsorption mechanism of the Fe 2 O 3 /CaSiO 3 composite material for As 2 O 3 . The experimental results demonstrated that the incorporation of Fe 2 O 3 resulted in an enhanced pore structure within the material. When the molar ratio of Fe:Si was set at 1:5, the Fe 2 O 3 /CaSiO 3 adsorbent exhibited optimal As 2 O 3 adsorption capacity at 1273 K, achieving a remarkable value of 996.0 mg/kg—significantly higher than that observed with pure calcium silicate. During the adsorption process, the doped iron oxide released additional free electrons, thereby facilitating the conversion of lattice oxygen into chemisorbed oxygen. Furthermore, density functional theory (DFT) calculations were utilized to further investigate the microscopic mechanisms underlying the behavior of the Fe 2 O 3 /CaSiO 3 composite adsorbent. The findings indicated that Fe sites within Fe 2 O 3 /CaSiO 3 served as primary active sites and electron transport channels for this material, promoting both separation and conversion processes involving lattice oxygen. During arsenic adsorption, significant orbital hybridization occurred between Fe atoms and O atoms in As 2 O 3 , which contributed to enhancing stability within the chemisorption system. Overall, Fe 2 O 3 /CaSiO 3 displayed exceptional performance in terms of arsenic adsorption capabilities along with notable anti-sintering properties, positioning it as a promising composite material for effective arsenic removal under high-temperature conditions.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Boyan Fu,Leyao Bi,Jiahui Lin,Jiaxing Fu,Junsheng Wen,Binglin Zou,Chunjie Wang,Yue Wang
ABO 3 -type gas sensors for ethanol gas-sensing remain a significant challenge. In this paper, porous microspheres of La 0.9 Fe 1-x Co x O 3 (x = 0, 0.05, 0.1, 0.15, 0.2) were synthesized via a ultrasonic-assisted hydrothermal method. The materials were characterized with various techniques to determine their phase structures, morphologies, electrochemical properties, and sensing abilities. For all investigated sensors, La 0.9 Fe 0.85 Co 0.15 O 3 exhibited a response value of 50.445 for 100 ppm ethanol gas at 200 °C (RH = 35 %), which is over eight times higher than that of LaFeO 3 under the same conditions. In addition to its high response to ethanol, La 0.9 Fe 0.85 Co 0.15 O 3 has excellent selectivity, humidity resistance (35–95 % RH), and a fast response/recovery time (18/9 s). Further analyses demonstrate that the synergistic effect of A-site cation defects and Co-doping plays a pivotal role in enhancing sensing performance by effectively increasing oxygen vacancy content and adsorption energy. This work presents an effective approach for developing high-performance ethanol gas sensors based on LaFeO 3 .
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高影响因子
ACS Omega
·
2020
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IF 2.87
Ying He,Ran Wang,Chenguang Sun,Shufeng Liu,Jingxin Zhou,Lexin Zhang,Tifeng Jiao,Qiuming Peng
Two kinds of layered double hydroxide (LDH) Langmuir composite films containing azobenzene (Azo) groups were successfully prepared by Langmuir–Blodgett (LB) technology. Then, an X-ray diffractometer (XRD), a transmission electron microscope (TEM), and an atomic force microscope (AFM) were used to investigate the structures of NiFe-LDH and the uniform morphologies of the composite LB films. The photoisomerization and acid–base gas sensor performances of the obtained thin film samples were tested by infrared visible (FTIR) spectroscropy and ultraviolet visible (UV–vis) spectroscropy. It is proved that the Azo dye molecules in the composite film are relatively stable to photoisomerization. In addition, the prepared composite films have high sensing sensitivity and good recyclability for acid–base response gases. The present research proposes a new clue for designing thin film materials for chemical gas response with good stability and sensitivity.
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高影响因子
POLYMER COMPOSITES
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2024
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IF 4.8
Chuanbo Cong,Daigang Peng,Mingyang Yuang,Mingchao Liu,Rehan Umer,Qiong Zhou
Layered double hydroxide/graphene oxide (GLDH) composites (SGLDH) modified by 7-octenyltrimethoxysilane (7-OTOS) were prepared by co-precipitation method. The structure and morphology of SGLDH were characterized using x-ray diffraction, Fourier-transform infrared spectroscopy (FTIR), x-ray photoelectron spectroscopy, scanning electron microscopy (SEM), high-resolution transmission electron microscopy, energy-dispersive x-ray spectroscopy, and thermogravimetric analysis. According to the obtained results, 7-OTOS was successfully grafted onto graphene oxide (GO) and layered double hydroxide (LDH) surfaces. 7-OTOS was grafted on both GO and LDH surfaces, which is why the amount of LDH loaded on the SGLDH surface was significantly increased compared with that on the GLDH composite. The filler-matrix interfacial interactions of the SGLDH-filled fluoroelastomer composites were characterized using contact angle analysis, dynamic mechanical analysis, RPA analysis, FTIR, SEM, and cross-linking density tests. It was indicated that the interfacial interactions between the SGLDH and matrix were significantly improved, and the SGLDH was well dispersed in the fluoroelastomer composites. In addition, the gas barrier properties and mechanical properties of the fluoroelastomer composites were tested. The carbon dioxide permeability coefficients of the fluoroelastomer composites filled with 10-phr SGLDH increased by about 32.1% and 20.3%, and the tensile strengths increased by about 47.6% and 27.7%, respectively, compared with those of the fluoroelastomer composites filled with 10-phr LDH and GLDH. Highlights SLDH nanocomposites are based on silyl ether linkages to increase LDH loading. Elastomer nanocomposites exhibited interfacial cross-linking mechanism. Interfacial interactions were exhibited between FKM and SGLDH. FKM/SGLDH exhibited enhanced gas barrier properties (+32%) compared to FKM. FKM/SGLDH exhibited enhanced mechanical properties (+47%) compared to FKM.
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SENSORS AND ACTUATORS B-CHEMICAL
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2020
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IF 7.1
Hao Wu,Jun Yu,Zhongzhou Li,Guanyu Yao,Rui Cao,Xiaogan Li,Huichao Zhu,Aixiang He,Zhenan Tang
High-performance, low-power microhotplate (MHP) gas sensors loaded with 3D hierarchical structured PdO/PdO 2 -SnO 2 :Sb materials on a pair of Al gas sensing electrodes were fabricated through advanced high-accuracy electrohydrodynamic printing method. The PdO/PdO 2 -SnO 2 :Sb materials with various PdO/PdO 2 concentrations were initially synthesized via a mild and simple hydrothermal reaction. Their micromorphology and chemical composition were characterized by SEM, XRD, TEM, and XPS, which proved the successful synthesis. The gas sensing performance of the sensors to benzene, ethanol, acetone, formaldehyde, and ethanol-acetone mixed gas (volume ratio 1:1) was tested. The sensing property of the materials is regulated with different content of PdO/PdO 2 . The identification of the VOCs is realized by two-step principal component analysis (PCA). Simulation calculations on the I–V characteristic of the MHP gas sensors reveal that carriers have to get through Al 2 O 3 barriers by Poole-Frenkel emission, which significantly affects the carrier conduction as well as the gas sensing properties. The gas sensing mechanism is analyzed from the aspects of gas sensing material and electrodes.
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Small
·
2024
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IF 13
Lihua Chen,Hui Ming,Bowen Li,Chen Yang,Shanshan Liu,Yajie Gao,Tingting Zhang,Canhua Huang,Tingyuan Lang,Zhuo Yang
Cancer metastasis poses significant challenges in current clinical therapy. Osthole (OST) has demonstrated efficacy in treating cervical cancer and inhibiting metastasis. Despite these positive results, its limited solubility, poor oral absorption, low bioavailability, and photosensitivity hinder its clinical application. To address this limitation, a glutathione (GSH)-responded nano-herb delivery system (HA/MOS@OST&L-Arg nanoparticles, HMOA NPs) is devised for the targeted delivery of OST with cascade-activatable nitric oxide (NO) release. The HMOA NPs system is engineered utilizing enhanced permeability and retention (EPR) effects and active targeting mediated by hyaluronic acid (HA) binding to glycoprotein CD44. The cargoes, including OST and L-Arginine (L-Arg), are released rapidly due to the degradation of GSH-responsive mesoporous organic silica (MOS). Then abundant reactive oxygen species (ROS) are produced from OST in the presence of high concentrations of NAD(P)H quinone oxidoreductase 1 (NQO1), resulting in the generation of NO and subsequently highly toxic peroxynitrite (ONOO − ) by catalyzing guanidine groups of L-Arg. These ROS, NO, and ONOO − molecules have a direct impact on mitochondrial function by reducing mitochondrial membrane potential and inhibiting adenosine triphosphate (ATP) production, thereby promoting increased apoptosis and inhibiting metastasis. Overall, the results indicated that HMOA NPs has great potential as a promising alternative for the clinical treatment of cervical cancer.
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PubMed
高影响因子
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