CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Yuli Zhou,Jian Wang,Xinkang Li
Flexible chemiresistor-type sensor based on chemically sensitive oxide semiconductors is of great potential for wearable sensing field. It is still challenging in designing sensing materials with high electron mobility for the enhancement of sensitivity and developing flexible chemical sensors with high durability for commercial applications. Herein, we introduce that poly (para-phenylene terephthalamide) fibers, which are currently employed as substrate to support the composite NiO@CuO metal oxide semiconductors. The poly (para-phenylene terephthalamide)-NiO@CuO gas sensor exhibits excellent thermostability, with rarely changing in mass observed up to 450 °C of high temperature testing. Furthermore, a relatively low limit of detection of 46.5 ppb for NH 3 is achieved at room temperature. The gas sensing mechanism of the sensing materials is interpreted via the electron-mobility-dominating gas sensing mode, in which the hole density is directly influenced via the electrons transferring between gas molecules and sensing materials. These results of the chemical gas sensor provide great promising for developing sensing materials with highly sensitivity and unlock the potential for newly-designed flexible chemiresistor-type sensor in the field of wearable sensing applications.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Shiyu Liu,Rongchang Wang,Cuixiang Ma,Dianhai Yang,Duanxin Li,Zbigniew Lewandowski
Oxygen and reactive oxygen species (ROS) produced during algal photosynthesis are important electron acceptors in photosynthetic algal microbial fuel cell (PAMFC) cathodes. In this study, spongy and petaline ZnO– [email protected] carbon felt cathodes were first fabricated through in situ ZnO–NiO growth and further modified with reduced graphene oxide (rGO) via electrodeposition and cyclic voltammetry reduction. The structural and electrochemical properties of the ZnO– [email protected] carbon felt cathodes were characterized, and the ROS adsorption capacity of the cathodes was analyzed via temperature programmed desorption and UV spectrophotometry. The results illustrated that the optimal molar ratio of Zn to Ni was 0.2 for cathode surface modification, and the specific surface areas of spongy and petaline ZnO 0.2 – [email protected] reached 215.26 and 230.88 mg·g −1 , respectively, which were more than 200-fold higher than that of prefabricated carbon felt. The areal capacitance values of spongy and petaline ZnO 0.2 – [email protected] cathodes reached 3033.5 and 6388.92 mC·cm −2 , respectively. The ROS concentrations on the spongy and petaline ZnO 0.2 – [email protected] cathode surfaces reached 52.36 and 64.02 μmol·L −1 , respectively, which were nearly 2-fold higher than that for prefabricated carbon felt cathode. The power densities of PAMFCs using spongy and petaline ZnO 0.2 – [email protected] as cathode electrodes were 20.18 and 31.92 mW·m −2 , respectively. The improvement of electrochemical performance of PAMFCs is partially ascribed to the enhanced ROS adsorption capacity of ZnO– [email protected] cathodes. Therefore, ROS adsorption capacity is recommended as an evaluation indicator for PAMFC cathodes.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yudi Wang,Xinyi Shen,Sainan Sun,Xinyun Li,Jiayi Gao,Yifan Shao,Shi-Wen Lv,Yanqing Cong
Heterogeneous persulfate-based advanced oxidation processes (PS-AOPs) have been regarded as one of the most promising methods in the treatment of wastewater containing antibiotic. Herein, the Co 3 O 4 /NiO composite with built-in electric field is prepared. The existence of built-in electric field can reduce the interface resistance and accelerate the charge transfer, promoting the electron transfer between the Co 3 O 4 /NiO composite and peroxymonosulfate (PMS). Meanwhile, built-in electric field can induce the formation of electron-deficient and electron-rich active areas. With built-in electric field intervention, the activation pathway of PMS over Co 3 O 4 component with electron-deficient area of Co 3 O 4 /NiO is transformed from radical to 1 O 2 , while electron-rich area makes NiO component that has no ability can activate PMS producing SO 4 •− and OH • . As a result, the Co 3 O 4 /NiO composite can effectively activate PMS to realize the rapid degradation of tetracycline. More significantly, a micro reactor equipping with Co 3 O 4 /NiO composite not only displays high removal efficiency of total organic carbon (TOC), but also improves the biodegradability of wastewater containing antibiotic. In short, current work not only clarifies the role of built-in electric field in PMS activation, but also shares some valuable insights into the application of PS-AOPs in practical engineering.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yeguang Zhang,Zichang Zhang,Guangqiang Chen,Shuni Li,Feihu Li,Shuzhuang Sun,Peng Wang,Fang Fang,Jingmin Ge,Zili Zhan
Developing highly selective and fast NH 3 gas sensors operable at room temperature (RT) has significant application value but remains challenging. Herein, Ni-NiO@polyaniline (PANI) nanocomposites (NNOPs) were fabricated by thermal treatment of Ni foam and in situ polymerization of aniline. NNOPs exhibit p-n response transitions and rapid response rates to NH 3 at room temperature under varying amounts of PANI loading. The maximum response to 100 ppm NH 3 is 143.7 % and the response/recovery time was 22/40 s, which is 3181 % shorter than the response time of pure PANI (700 s). The unique response transition can significantly enhance the selectivity of NH 3 sensing. Additionally, NNOPs also demonstrate excellent repeatability, long-term stability, and humidity insensitivity. The outstanding sensing performance can be attributed to the ohmic contact between Ni and NiO, the oxygen vacancies induced by PANI surface modification and the large specific surface area. The high selectivity and fast NH 3 response of NNOPs sensors at RT hold great value for applications in fields such as internet of things and flexible electronics.
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2020
·Vol. 7
·期 11
·115007
·
IF 1.929
Baige Yuan,Jun Li,Manman Xia,Ying Zhang,Ruyan Lei,Peng Zhao,Xiao Li
The NiO/graphene (NiO/G) composite nanofibers were successfully synthesized by simple electrospinning followed by heat treatment. They as anode materials for lithium ion batteries demonstrated the more outstanding electrochemical performance when compared with the NiO + Ni composite nanofibers as the reference. NiO/G exhibited a higher discharging/charging capacity (about 712 mAh·g−1 at the third cycle) with a coulombic efficiency of nearly 100% than NiO + Ni (547 mAh·g−1). NiO/G also demonstrated the excellent cycling stability due to its higher discharging capacity of 571 mAh·g−1 and retention rate of 78% than NiO + Ni (184 mAh·g−1 and 33%) when subject to 50 cycles at 100 mA·g−1. Moreover, its rate performance was also greatly improved when compared with NiO + Ni owing to its higher discharging capacity (305 mAh·g−1, 556 mAh·g−1) and retention rate (44%, 80%) at the current density increased from 100 mA·g−1 to 2000 mA·g−1, and then recovered to 100 mA·g−1. The outstanding electrochemical performance of the NiO/G electrode is closely related to its lower ohmic resistance (2.1 Ω)/charge transfer resistance (86.5 Ω), and stronger diffusion capability of Li+ resulting from the high specific surface area, excellent conductivity and a certain charge storage capacity of graphene.
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2019
·Vol. 34
·期 16
·2757-2764
·
IF 1.982
Yi-Dong Zhang,Lei Zhao
Fabrication and characterization of solution-processed, all-inorganic quantum dots (QDs) light-emitting diodes (QLEDs) incorporating colloidal CdSe/ZnS QDs are presented. Using a simple solvothermal process, Cu-doped NiO nanocrystals were fabricated and applied as a hole transport layer in all inorganic QLEDs. Cu-doped NiO nanocrystals are ascribed to bunsenite cubic structure. The transmittance of the film is more than 81%. The hole-only devices of Au/QDs/Cu–NiO/ITO structures showed that 5% mol Cu doped NiO film obtained the largest hole current. The resulting devices show pure QD electroluminescent emissions with a maximum electroluminescence brightness of 2258 cd/m2 after doping 5% mol Cu in NiO, which is almost 4-fold compared with that of intrinsic NiO due to the enhanced carrier concentration and conductivity. The current efficiency and EQE of the assembled all-inorganic QLED exhibited the maximum values of 1.18 cd/A and 1.223%, respectively.
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Jie Yang,Chan Hu,Hongyuan Huang,Huan Yang,Limin Li,Wen Yao,Xinrong Guo,Linxian Xu
Electrochemical detection of histamine (HA) faces a significant challenge: the oxygen evolution reaction (OER) causes substantial background interference at the high potentials required for HA oxidation. To address this, a novel sensing platform was constructed based on an in-situ prepared NiO/Cu/Cu 2 O heterojunction electrode, where the oxygen vacancy (O v ) density was modulated via electrodeposition to significantly enhance catalytic activity. The unique methodological advance of this platform lies in leveraging the inherent Ni 2+ /Ni 3+ redox couple for indirect HA quantification, thereby completely circumventing OER interference. The fabricated sensor demonstrates exceptional performance, including ultra-high sensitivity (3.51 mA mM −1 cm −2 ), a low detection limit (0.044 nM), and a wide linear range (1 nM to 5 × 10 6 nM). Furthermore, the platform was successfully applied to detect HA in complex matrices (fish samples), yielding results consistent with high-performance liquid chromatography. This work demonstrates the platform's potential as a robust analytical tool for convenient, rapid, and highly sensitive HA detection in real samples.
✓ 已验证
产品关联
DOI
高影响因子
SCRIPTA MATERIALIA
·
2019
·
IF 4.539
Jie Zhu,Guolin Cao,Yunjiao Li,Xiaoming Xi,Zhuomin Jin,Bin Xu,Wei Li
Generally, the synthesis of precursors for metal oxide anode and LiNiO 2 -based cathode materials undergoes different routes. Herein, NiO anode and LiNiO 2 cathode material for lithium-ion batteries are synthesized by sharing the rod-like NiC 2 O 4 precursor which is prepared by the solvothermal method. As a result, NiO and LiNiO 2 exhibit special fibrous structure and promising electrchemical performances without any modification. Especially, the synthesis of fibrous LiNiO 2 via a solvothermal route and its electrochemical properties are first reported. The excellent electrochemical performances of LiNiO 2 can be attributed to the decent fiber architecture which enhances wettability by the electrolyte and shortens Li + diffusion pathways.
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Yanqing Cong,Yanan Li,Xiaoran Wang,Xing Wei,Lin Che,Shi-Wen Lv
In this study, a double p-n heterojunction based on g-C 3 N 4 @NiO/Ni@MIL-101 ternary composite was successfully prepared by a feasible method. Results suggested that the rational growth of NiO and MIL-101 on the surface of g-C 3 N 4 can improve the absorption capacity for visible light. Importantly, the formation of double p-n heterojunction can effectively inhibit the recombination of photogenerated electrons and holes. Due to the significant Fermi level differences among NiO, MIL-101 and g-C 3 N 4 , the internal electric fields were established on the interface after constructing the composite, consequently reducing the electrical resistance and accelerating the transfer of photoinduced charge carriers. As expected, the g-C 3 N 4 @NiO/Ni@MIL-101 ternary composite with good stability had excellent photocatalytic performance in the degradation of emerging pollutants, and the removal efficiency of ibuprofen was as high as 95.6%. The •O 2 − , •OH and 1 O 2 were the major active species in the reaction system. Furthermore, developed photocatalytic oxidation system can also achieve the rapid inactivation of bacteria. Based on the synergistic effects of energy band position and double internal electric fields, the separation and transfer of photogenerated charge carriers followed a traditional type-II route. In short, current work not only constructed a promising photocatalyst, but also shared an effective strategy for boosting the photocatalytic activity.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Zeyu Liu,Xiaohan Shan,Qiang Xue,Yao Liu,Lin He,Haijiao Xie
In this study, we employed a straightforward and rapid one-step electrodeposition method to enhance modify an Au/NiO/Rh composite on laser-induced graphene (LIG) for nitrite (NO 2 – ) detection. We extensively characterized and tested the morphological composition and electrochemical properties of the electrode using scanning electron microscopy and other characterization techniques. To compare the electrochemical active surface areas of the electrode before and after modification, we conducted cyclic voltammetry experiments. Additionally, we confirmed the changes in electron transfer performance and adsorption energy of the modified electrode through by density functional theory calculations. The experimental results demonstrate that the combined modification of LIG with rhodium nanoparticles (RhNPs) and gold nanoparticles (AuNPs) improves electron transport ability at the electrode interface and enhances the electrode's electrocatalytic performance. The incorporation of nickel oxide (NiO) also provides a larger reaction area and more active sites for NO 2 – detection. The synergistic effects of these three modified components significantly enhance NO 2 – detection at the electrode, surpassing the performance of the bimetallic modified electrode. Under optimized experimental conditions, the sensor exhibits a linear range of 1 μmol/L to 1 mmol/L and a detection limit of 0.3 μmol/L. Furthermore, the sensor demonstrates excellent anti-interference and repeatability properties. We successfully applied the sensor for determination of NO 2 – in tap water, yielding satisfactory results. This research presents a promising strategy for the portable, sensitive, and in-situ detection of NO 2 – in water environments using metal-based electrochemical sensors.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Fan Zhang,Renjie Ji,Yonghong Liu,Zhijian Li,Zheng Liu,Shuaichen Lu,Yating Wang,Xinlei Wu,Hui Jin,Baoping Cai
Exploring the low-cost and high-efficient electrocatalysts with Pt-like activity for alkaline hydrogen evolution through water splitting is imperative yet challenging. Herein, a simple synthesis combined with electrodeposition and facile electro-oxidation is developed to construct the hollow dendritic self-supported electrode (HDSE). X-ray photoelectron spectroscopy (XPS), X-ray absorption fine structure (XAFS), and electron paramagnetic resonance (EPR) reveal that the surface of HDSE contains the abundant NiO, which is further decorated by fluorine (F)-doped and oxygen vacancies after electro-oxidation process. The resultant HDSE achieves an excellent electrocatalytic performance for hydrogen evolution reaction (HER) in alkaline condition, leading to the extremely low overpotential of 13 mV to drive a current density of −10 mA·cm −2 , and exhibits the long-time stability at the current density of −100 mA·cm −2 and −500 mA·cm −2 , which is superior to the electrocatalytic ability of Pt/C. Density functional theory (DFT) calculations illustrate the NiO modulated by F-doping and oxygen vacancy, could synergistically improve the charge distribution, enhance the conductivity of NiO structure, and optimize the adsorption energy for intermediates of HER, thus accelerating the electrocatalytic ability for hydrogen evolution. This work opens up a new avenue toward the reasonable design of high-efficient and low-cost electrocatalysts for alkaline hydrogen evolution reaction.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Jiafeng Ding,Shihuan Lu,Lilai Shen,Ruopeng Yan,Yinan Zhang,Hangjun Zhang
Polychlorinated dibenzo- p -dioxins (PCDDs), characterized by their high persistency and bioaccumulation, are widely detected in the environment. In this study, high-performance g-C 3 N 4 /NiO heterojunctions were fabricated to degrade 2-chlorodibenzo- p -dioxin (2-CDD) under ultraviolet-visible (UV–vis) light illumination. Experiments revealed that the pure g-C 3 N 4 and range of g-C 3 N 4 /NiO heterojunctions were synthesized by the mixing and heating method, and then were characterized by XRD, TEM, XPS and PL etc. The composites exhibited enhanced dechlorination activities under anoxic conditions. After comparison, the g-C 3 N 4 /NiO (4:6) showed optimal dechlorination performance such that 70.4% of 2-CDD was removed within 8 h and 52.3% of 2-CDD was transformed to dibenzo- p -dioxin (DD), about fourfold higher than the pristine g-C 3 N 4 . The transformation of 2-CDD was accompanied by the resale of Cl ion, and the additional oxygen was proven to be able to consume electrons and hydrogen ions, thus greatly inhibiting the degradation of PCDD in systems. The g-C 3 N 4 /NiO (4:6) can be reused at least seven times, and the mechanism was proposed in detail to promote photoinduced electrohole separation and provide active sites. This study extends the use range of g-C 3 N 4 /NiO heterojunctions and develops a new technology to degrade PCDDs with striking activity and stability.
✓ 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）