APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Ruichun Nan,Xinxin Zhang,Yuheng Zhao,Hongda Huang,Yapeng Niu,Ying Yan,Litao Zhang,Bingkun Liu,Jingtao Zhang,Xianzhong Yin
Herein, Pd-doped CeO 2 was synthesized by facile hydrothermal methods, X-ray diffraction (XRD) analysis and transmission electron microscope (TEM) suggests that Pd is successfully incorporated into the CeO 2 lattice. X-ray photoelectron spectroscopy (XPS), UV–Vis and PL demonstrated that Pd-doped CeO 2 improve the light absorption and enhance the electron-hole separation of CeO 2 . The prepared Pd-CeO 2 exhibits outstanding bactericidal performance. Specifically, 1 % Pd-CeO 2 can completely inactivate Ralstonia solanacearum with an initial concentration of 2 × 10 7 CFU/mL within 60 min, while also demonstrating effective killing against Escherichia coli and various pathogenic fungi. EPR demonstrated that Pd doping into CeO 2 could increase the number of vacancies, electron spin resonance (ESR) tests demonstrated that e - play a major role in the photocatalytic process, disruption of the cellular structure of E. coli during photocatalytic treatment as evidenced by scanning electron microscopy (SEM) tests. Promising reference for the practical application of precious metal photo catalysts in disinfection.
研究领域:
材料科学
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微生物学
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环境科学
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产品关联
DOI
高影响因子
ENERGY
·
2021
·
IF 7.147
Xiuquan Li,Zhongqing Yang,Li Zhang,Ziqiang He,Ruiming Fang,Ziqi Wang,Yunfei Yan,Jingyu Ran
The catalytic reaction of C 2 H 6 with CO 2 provides an opportunity to use shale gas and the greenhouse gas as source materials to produce ethylene through oxidative dehydrogenation or produce syngas through dry reforming . In this work, the reaction characteristics of ethane with CO 2 on Fe/Co/Ni/Cu monometallic catalysts and Pd-doped bimetallic catalysts were studied through activity test, kinetic analysis , catalyst characterization and DFT calculation. It is found that Pd–Fe 6 /CeO 2 has a high and stable C 2 H 4 selectivity of 80.4%, which is suitable for oxidative dehydrogenation reaction, while Ni 6 /CeO 2 has a large ethane/CO 2 conversion and a high CO selectivity of 96.5%, which is suitable for dry reforming reaction. For Fe-based catalyst, the doping of Pd form double active component structure. It only reduces the energy barrier of ethylene formation and CO 2 direct activation to provide O∗, but also increases the energy barrier of ethylene deep dehydrogenation, thus increasing the conversion of reactants and selectivity of C 2 H 4 . For Ni-based catalysts, the doping of Pd forms the alloy structure, which reduces the energy barrier of O∗-assisted dehydrogenation reaction and increases the conversion of reactants, but increases the energy barrier of C–C bond cleavage and CO 2 activation reaction, which reduces the selectivity of reforming to syngas.
研究领域:
催化化学
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材料科学
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能源化学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED PHYSICS
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2023
·Vol. 134
·期 8
·
IF 3.2
Li Gaojie,Zhang Linqi,Du Kai,Wang Xinxin,Yin Menghao
Reducing the working temperature and increasing sensitivity and selectivity has always been a research hotspot in the field of MOS based gas sensors. In this work, improved triethylamine (TEA) sensing performance and mechanism of SnO 2 by doping Pd have been investigated. SnO 2 nanoparticles and Pd-SnO 2 with different doping amounts of Pd (0%, 0.1%, 0.3%, 0.5%, and 0.7%) were successfully prepared by the hydrothermal method. The size of SnO 2 nanoparticles is very uniform (∼15 nm). The SnO 2 sensor exhibited the highest sensitivity to ethanol at 290 °C. After Pd doping, Pd/SnO 2 sensors not only reduced the optimum working temperature but transformed selectivity from ethanol to TEA. In the Pd-SnO 2 system, the 0.5Pd-SnO 2 sensor exhibited high sensitivity (61), fast response-recovery properties (16 s/6 s) to 50 ppm TEA, lower detection limits (0.1 ppm), good repeatability, and higher selectivity. Furthermore, based on density functional theory calculations, the improved TEA sensing performance of 0.5Pd-SnO 2 sensors can be attributed to the improved surface activity of SnO 2 by Pd doping and the catalytic activation of O 2 and TEA by Pd.
研究领域:
材料科学
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化学
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产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2021
·
IF 6.986
Ping Li,Ziwei Zhang,Zhihua Zhuang,Jinhan Guo,Zhongying Fang,Shemsu Ligani Fereja,Wei Chen
Metal oxide semiconductors (MOS) with different nanostructures have been widely used as gas sensing materials due to the tunable interface structures and properties. However, further improvement of the sensing sensitivity and selectivity is still challenging in this area. Constructing appropriate heterogeneous interface structures and oxygen vacancies is one of the important strategies to tune the sensing properties of MOS. In the present study, interfacial heterostructures in PdxW18O49 nanowires (PdxW18O49 NWs) were fabricated and manipulated by doping different Pd contents through a simple hydrothermal process. Relevant characterization proved that the structure and composition of the one-dimensional (1D) nanomaterial can be effectively changed by Pd doping. It was found that the oxygen vacancy concentration increases first with the increase of Pd content, and when the Pd content increases to 7.18% (Pd7.18%W18O49 NWs), the oxygen vacancy content reaches the maximum (52.5%). If the Pd content continues to increase, the oxygen vacancy ratio decreases. The gas sensing investigations illustrated that the PdxW18O49 NWs exhibited enhanced sensing properties than pure W18O49 NWs toward acetone. Among the as-prepared catalysts, the Pd7.18%W18O49 NWs showed the best sensing response and the fastest response-recovery speeds (5 and 10 s, respectively) at a working temperature of 175 °C. In addition, this 1D nanostructure with fabricated heterostructures also delivers a good sensing selectivity and a wide detection range from 100 ppb to 300 ppm, with maintaining excellent performance in the presence of high concentrations of ethanol and carbon dioxide. The excellent gas sensing behavior could be attributed to the generated oxygen vacancies and the heterostructures upon Pd doping. This study offers a novel strategy for the design of high-performance gas sensors for ppb-level acetone sensing.
研究领域:
材料科学
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化学工程
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传感器技术
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DOI
高影响因子
ACS Sensors
·
2024
·
IF 8.2
Tianyang Mo,Xianwu Xu,Tiejun Fang,Hongwei Tao,Hongbo Wang,Ming Liang Jin,Bingjun Yu,Linmao Qian,Zhi-Jun Zhao
Developing hydrogen sensors with parts per billion-level detection limits, high response, and high stability is crucial for ensuring safety across various industries (e.g., hydrogen fuel cells, chemical manufacturing, and aerospace). Despite extensive research on parts per billion-level detection, it still struggles to meet stringent requirements. Here, high performance and ppb-level H2 sensing have been developed with palladium-doped iron oxide nanotubes (Pd@Fe2O3 NTs), which have been prepared by FeCl3·6H2O, PdCl2, and PVP electrospinning and air calcination techniques. Various characterization techniques (FESEM, TEM, XRD, and so forth) were used to prove that the nanotube structure was successfully prepared, and the doping of Pd nanoparticles was realized. The experiments show that palladium doping can significantly improve the gas response of iron oxide nanotubes. Specifically, 0.59 wt % Pd@Fe2O3 NTs have high response (Ra/Rg = 41,000), high selectivity, and excellent repeatability for 200 ppm hydrogen at 300 °C. Notably, there was still a significant response at a low detection limit (LOD) of 50 ppb (Ra/Rg = 16.8). This excellent hydrogen sensing performance may be attributed to the high surface area of the nanotubes, the p–n heterojunction of PdO/Fe2O3, which allows more oxygen to be adsorbed on the surface, and the catalytic action of Pd nanoparticles, which promotes the reaction of hydrogen with surface-adsorbed oxygen.
研究领域:
材料科学
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传感器技术
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2020
·
IF 7.1
Yun-Zhi Dai,Shu-Yu Liang,Chao Lv,Gong Wang,Hong Xia,Tong Zhang,Hong-Bo Sun
Micro/nanoscale gas sensors attracted more attention because of their potential application in the emerging areas such as electronic capsules, wearable devices, and microdrone detectors. However, it is still a challenge to achieve micro/nanoscale sensors with controllable processing parameters of active components and fast response and recovery capability. Here, a flexible and high precision femtosecond laser direct-writing technology is selected to print various semiconductor metal oxides nanoparticles into microscale designable patterns with mask-free. And by using Pd-doped WO 3 • x H 2 O nanoparticles we have fabricated single Pd-WO 3 • x H 2 O microwire (SPWM) as gas sensors, which represented high sensitivity, faster response and recovery. Especially, for ammonia gas sensing the SPWM with pre-designed lengths can possess ultrafast response with response/recovery time of 1.4/3.3 s in 50 ppm NH 3 , or low limit-of-detection of 1 ppm at room temperature. This kind of micro-scale gas sensor is expected to be applied to human health monitoring, environmental air detection and other integrated intelligent devices.
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
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
·
IF 4.939
Ying-Hua Zhou,Xingyun Cao,Jingzhu Ning,Changchun Ji,Yong Cheng,Jing Gu
To exploit the low-cost and efficient catalyst for the hydrolytic dehydrogenation of ammonia borane , trace amount of palladium-doped transition metal (Cu, Ni, Co, Fe and Zn) nanoparticles have been incorporated into the interior of metal-organic frameworks named ZIF-8, ZIF-67, ZIF-67/ZIF-8 and core-shell ZIF-67@ZIF-8 by a double-solvent approach. The optimized catalyst of CuPd 0.01 @ZIF-67@ZIF-8 composite exhibited an excellent activity with a turnover frequency (TOF) value of 30.15 mol H 2 (mol metal ) −1 min −1 at 298 K and a relatively low activation energy of 38.78 kJ mol −1 . It might attributed to both ultrafine size of metal nanoparticles (~3 nm) induced by the confinement of core-shell ZIF-67@ZIF-8 and the synergistic effect between Pd and Cu. Moreover, the detailed kinetic study has manifested that this catalytic reaction is first-order in regards to the catalyst amount while zero-order as for the concentration of ammonia borane. In addition, the durability and recyclability of CuPd 0.01 @ZIF-67@ZIF-8 have been demonstrated to be great.
研究领域:
材料科学
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化学工程
·
能源技术
✓ 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
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Bowen Wang,Lu Song,Chen Peng,Ximeng Lv,Gengfeng Zheng
The acidic CO 2 reduction reaction (CO 2 RR) offers a promising approach to mitigate CO 2 reactant loss and carbonate deposition, which are challenging issues in alkaline or neutral electrolytes. However, the hydrogen evolution reaction (HER) competes in the proton-rich environment near the catalyst surface as a side reaction, reducing the energy efficiency of generating multi-carbon (C 2+ ) products. In this work, we proposed a palladium (Pd) doping strategy in a copper (Cu)-based catalyst to stabilize polarized Cu 0 -Cu + sites, thus enhancing the C C coupling step during the CO 2 RR while suppressing HER. At an optimal doping ratio of 6%, the Pd dopants were well dispersed as single atoms without aggregation, allowing for the stabilization of subsurface oxygen (O Sub ), preserving the polarized Cu 0 -Cu + active sites, and reducing the energy barrier of C C coupling. The Pd-doped Cu/Cu 2 O catalyst exhibited a peak Faradaic efficiency (FE) of 64.0% for C 2+ products with a corresponding C 2+ partial current density of 407.1 mA∙cm −2 at −2.18 V versus a reversible hydrogen electrode, a high CO 2 single-pass conversion efficiency (SPCE) of 73.2%, as well as a high electrochemical stability of ∼ 150 h at industrially relevant current densities, thus suggesting a potential approach for tuning the electrocatalytic CO 2 performances in acidic environments with higher carbon conversion efficiencies.
研究领域:
电化学
·
催化材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
·
2020
·Vol. 35
·期 9
·095030
·
IF 2.361
Zhiqiang Yao,Xi Wang,Man Yang,He Ma,Yanfeng Sun,Hong Zhang,Tianwei Dong,Weifeng Liu
Doping of noble metals into semiconductors is often used to enhance the response of gas sensors, accompanying the decrease of the particle size. In this work, pure and palladium-doped dispersive nanoscale tin dioxide nanoparticles with abundant surface defects are synthesized efficiently via a facile hydrothermal method. In the experiment, glucose is used as the carbon source to limit the growth of crystals through the carbonization process and create abundant surface defects after high temperature calcination. Compared with pure SnO2, Pd doping only slightly decreases the particle size with the increase of palladium doping amount from 11.9 nm to 9.6 nm. A gas-sensing investigation indicates that the sensor devices based on pure and 1 at%, 3 at%, 5 at% palladium-doped SnO2 show an obvious high response to n-butanol. In particular, the response to n-butanol reaches to the maximum with the palladium doping amount of 3 at%, and the response increases from 33.3 to 92.9 to 100 ppm n-butanol compared with pristine SnO2 nanoparticle at optimal working temperatures. A gas-sensing mechanism related to surface defects, chemical and electrical sensitization is also discussed.
研究领域:
材料科学
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化学工程
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Kelin Hu,Feipeng Wang,Hongcheng Liu,Yanqiong Li,Wen Zeng
Pd-doped SnO 2 nanofibres were prepared by electrospinning and magnetron sputtering . It was found that the efficiency of gas sensing properties in these fibres depends primarily on the density of oxygen vacancies , which can be regulated by plasma treatment. We demonstrated that moderate plasma treatment can increase the oxygen vacancy as well as improve the gas sensing performance of SnO 2. However, excessive plasma treatment led to the production of other substances that deteriorated the gas sensing performance. Furthermore, the best results for hydrogen gas sensing were obtained when the nanofibres were subjected to plasma treatment for 1 min. The fabricated material demonstrated a response of more than 53 for 500 ppm hydrogen at the optimum temperature (130 °C), which is a significant improvement as compared to sensors without plasma treatment. Evidently, plasma treatment is an effective method to further enhance the sensing properties of the fabricated nanofibres.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
ENERGY
·
2022
·
IF 8.857
Heping Xie,Hailong Liao,Shuo Zhai,Tao Liu,Yifan Wu,Fuhuan Wang,Junbiao Li,Yuan Zhang,Bin Chen
Using aqueous Zn–CO 2 batteries to store renewable energy and produce valuable chemicals using CO 2 as the source is a promising method for CO 2 mitigation, that is alternative to traditional energy-costing CO 2 capture/storage technologies. However, the lack of efficient CO 2 -reduction catalysts significantly hinders the efficiency of such batteries. In this study, an efficient perovskite cathode, Pd-doped La 2 CuO 4 , was successfully developed for the cathodic CO 2 reduction reaction (CO 2 RR), and the optimal doping ratio of La 2 Cu 1-x Pd x O 4 ( x = 0.05) was determined. Compared with the pristine La 2 CuO 4 catalyst, the current density for the CO 2 RR in the H-cell and the Faraday efficiency of CO production are both increased by ∼50% when operated −1.0 V (vs RHE). As a result, the peak power density of a Zn–CO 2 battery using the Pd-doped La 2 CuO 4 catalyst reached 0.75 mW cm −2 at 2.23 mA cm −2 by an enhancement ratio of 25%. Density functional theory calculations revealed that the *CO desorption processes on the cathode were enhanced owing to Pd doping, which accounted for the enhanced CO 2 RR activity and selectivity. The findings of this study show the potential application of perovskite catalysts in the cathode of Zn–CO 2 batteries and provide an effective method for battery performance enhancement via the facile Pd doping.
研究领域:
材料科学
·
电化学
·
能源存储与转换
✓ 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）