IONICS
·
2023
·Vol. 29
·期 9
·3693-3701
·
IF 2.8
Tang Xiao,Wang Zhenwei,Cai Dandan,Shao Qinsi,Qin Ziwei,Liu Yang,Li Wenxian,Li Ying,Zhang Jiujun
Design and synthesis of high-performance and low-cost electrocatalysts for methanol oxidation reaction (MOR) are of great significance in energy conversion applications. In this work, g-NiO/CuO composites with high catalytic performance for MOR are successfully synthesized by a template method using g-C 3 N 4 flakes as the sacrificial template. NiO nanoparticles are dispersed uniformly on the surface of the pine needle-liked CuO substrate, resulting in a synergistic effect which can enhance the electrocatalytic MOR activity and stability of g-NiO/CuO catalysts. The catalyst shows a maximum peak current density of 159 mA cm −2 and also long-term stability. The bimetal-oxide-synergistic strategy in this work highlights a promising way for the design of catalysts with high electrochemical performance for direct methanol fuel cells (DMFCs).
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2020
·Vol. 25
·期 5
·1097
·
IF 3.267
Run-Kun Zhang,Die Wang,Yan-Jun Wu,Yi-Han Hu,Jian-Yu Chen,Jin-Can He,Jing-Xin Wang
Sensitive and selective detection of harmful gas is an important task in environmental monitoring. In this work, a gas sensor based on cataluminescence (CTL) for detection of acetaldehyde was designed by using nano-NiO as the sensing material. The sensor shows sensitive response to acetaldehyde at a relatively low working temperature of 200 °C. The linear range of CTL intensity versus acetaldehyde concentration is 0.02–2.5 mg/L, with a limit of detection of 0.006 mg/L at a signal-to-noise ratio of three. Mechanism study shows that electronically excited CO2is the excited intermediate for CTL emission during the catalytic oxidation of acetaldehyde on the NiO surface. The proposed sensor has promising application in monitoring acetaldehyde in residential buildings and in the workplace.
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
ChemSusChem
·
2018
·Vol. 11
·期 13
·2156-2164
·
IF 7.411
Feng Li,Jing Li,Jie Zhang,Lili Gao,Xuefeng Long,Yiping Hu,Shuwen Li,Jun Jin,Jiantai Ma
Graphical Dope to promote : A high-performance photoanode consisting of NiO nanoparticles anchored on a gradient P-doped α-Fe 2 O 3 nanorod array (NiO/P-α-Fe 2 O 3 ) is successfully fabricated. The electrochemical results show that the photoanode presents a high photocurrent density and long-term stability for improved water oxidation. The photoelectrochemical (PEC) water-splitting efficiency of a hematite-based photoanode is still far from the theoretical value due to its poor surface reaction kinetics and high density of surface trapping states. To solve these drawbacks, a photoanode consisting of NiO nanoparticles anchored on a gradient phosphorus-doped α-Fe 2 O 3 nanorod (NR) array (NiO/P-α-Fe 2 O 3 ) was fabricated to achieve optimal light absorption and charge separation, as well as rapid surface reaction kinetics. Specifically, a photoanode with the NR array structure allowed a high mass-transport rate to be achieved, while phosphorus doping effectively decreased the number of surface trapping sites and improved the electrical conductivity of α-Fe 2 O 3 . Furthermore, the p–n junction that forms between NiO and P-α-Fe 2 O 3 can further improve the PEC performance due to efficient hole extraction and the water oxidization catalytic activity of NiO. Consequently, the NiO/P-α-Fe 2 O 3 NR photoanode produced a high photocurrent density of 2.08 mA cm −2 at 1.23 V versus a reversible hydrogen electrode and a 110 mV cathodic shift of the onset potential. This rational design of structure offers a new perspective in exploring high-performance PEC photoanodes.
研究领域:
材料科学
·
能源研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2018
·
IF 4.61
Jia-Jia Xu,Ya-Fei Cheng,Lian-Zeng-Ji Xu,Ying-Yi Liu,Bing-Qian Zhu,Nian-Si Fan,Bao-Cheng Huang,Ren-Cun Jin
Given the increasing applications of NiO nanoparticles (NPs) in battery products, the potential effects of NiO NPs on anaerobic ammonium oxidation (anammox) systems were studied for the first time. The results showed that the anammox system performance obviously differed under the stresses of different NiO NPs concentrations. After the withdrawal of NiO NPs, the nitrogen removal performance of the anammox reactor returned to nearly that of the initial phase within 35 days. Compared with 0 mg L −1 NiO NPs, the specific anammox activity first increased and then decreased to the minimum value of 116.8 ± 13.8 mg TN g −1 VSS d −1 at 60 mg L −1 NiO NPs. The variations in the heme c contents and extracellular polymeric substance amounts were similar to the variations in the specific anammox activity throughout the whole experiment. Additionally, the relative abundance of the dominant bacteria ( Candidatus kuenenia ) increased from 20.44% at 60 mg L −1 NiO NPs to 23.14% at the end of the last phase. Thus, the potential effects of NiO NPs on anammox systems should be a cause for great concern.
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Chuanxin Yu,Mingxia Li,Decai Yang,Kai Pan,Fan Yang,Yachao Xu,Lang Yuan,Yang Qu,Wei Zhou
The low charge separation efficiency of semiconductor photocatalyst is still a stumbling block to improve photocatalytic performance. The p-n heterojunction with built-in electric field usually favors the spatial charge separation. Herein, NiO nanoparticles dotted TiO 2 nanotubes p-n heterojunction photocatalysts (NiO/TNs) are fabricated through hydrothermal and wet-impregnation strategies. The resultant NiO/TNs with relatively large surface area of 102.8 m 2 g −1 shows excellent photocatalytic H 2 production rate of 228 μmol h −1 g −1 , which are four times higher than that of TNs (50 μmol h −1 g −1 ) under AM 1.5G irradiation without any cocatalyst. The high photocatalytic activity can be ascribed to the uniform growth NiO nanoparticles on surface of TNs enhancing the photoresponse to visible light region, and the formation of p-n heterojunctions induced built-in electric field promoting photogenerated electrons transmission from NiO to TNs through the heterogeneous interface, thus enhanced the charge carriers migration and separation efficiently.
研究领域:
材料科学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
ENERGY
·
2019
·
IF 5.537
Lin Long,Weixing Zhou,Yunfeng Qiu,Zhenzhong Lan
Endothermic hydrocarbon fuel of active thermal protection has great potential in cooling system. The bottlenecks for the practical application are the unsatisfied heat sink and severe coking issue. Here, NiO nanoparticle/nanosheet hybrid thin layers were successfully wrapped on the commercial HZSM-5 (denoted as ZSM-5@Ni M ), and showing significant modulation ability for the acidity properties of HZSM-5 to boost supercritical cracking of n-decane. The as-prepared catalysts make the NiO and HZSM-5 show synergistic effect which dramatically lowers the overall acidity of composite, thus changes the cracking path of n-decane, and results in effective anti-coking properties. ZSM-5@Ni M decelerated many additional free radicals and generated more gases products by monomolecular beta cleavage reaction. Gases products also show positively correlating with the heat sink. The catalysts improve the heat sink of n-decane from 3.77 MJ/kg at 728 °C to 4.59 MJ/kg at 780 °C. Present work demonstrates that the introduction of nanostructured metal oxides into HZSM-5 will synergistically adjust the acidity of composite, leading to the manipulation of catalytic cracking path and extent, gas products, heat sink, coking behavior of supercritical n-decane, finally providing deep insights for the design and fabrication of catalysts for hydrocarbon fuel cracking.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2015
·Vol. 183
·期 2
·683-688
·
IF 3.741
Jia Shengsong,Li Pengfei,Koh Kwangnak,Chen Hongxia
The article describes the use of a designed histidine (His)-tagged arginine-glycine-aspartic acid (RGD) peptide as a linker to bind integrin to captured cancer cells, and how to amplify the surface plasmon resonance (SPR) signal after binding of NiO nanoparticles (NiO-NPs) via the His-tag on the peptide. Specifically, breast cancer cells were captured via the interaction between human mucin (MUC-1) and a gold surface modified with a MUC-selective aptamer. The resulting cytosensor exhibits specificity and high sensitivity which is due to the enhancement of the SPR signal by NiO-NPs. The breast cancer cell line MCF-7 can be easily distinguished from normal islet beta cells by using this biosensor. Implementation of the His-tagged RGD peptide modified with NiO-NPs resulted in 20-fold enhancement of the SPR signal at the limit of detection. Hence, the actual limit of detection is lowered to 136 cells per mL. In our perception, this cytosensor has a large clinical potential in that it may also be used to detect various other kinds of tumor cells.
Histidine-tagged arginine-glycine-aspartic acid peptide carried by NiO interacts with the integrin of cancer cells and amplifies the SPR signal resulting from interaction between human mucin (MUC-1) and a gold surface modified with a MUC-selective aptamer. As little as 136 cells·mL −1 are detectable.
研究领域:
生物传感技术
·
肿瘤检测
·
医学诊断
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Peng Wang,Xiao Zhang,Yan Wei,Ping Yang
Ni/NiO nanoparticles (NPs) were encapsulated in one dimensional (1D) graphitic nanofibers using a two-step calcination route. The precursor fibers obtained by electrospinning were heated in air at a low temperature firstly, followed by calcination at high temperature in Ar. With changing the amount of Ni precursors and preparation conditions, the morphology of resulting samples were adjusted from porous nanofiber to nanotube-loaded bulky material. The sizes and distribution of Ni/NiO NPs also changed. These NPs were in and on the nanofibers or located on the top of nanotubes. Electrochemistry test results indicate that resulting sample revealed enhanced electrocatalytic hydrogen evolution reaction (HER) when the precursor contained 0.5 mmol Ni. In an alkaline medium , the current density of samples could reach up to 280 mA cm −2 . This is ascribed to the homogeneous distribution of Ni/NiO NPs and the porous structure of nanofibers with a large surface area of 251 m 2 /g. In contrast, the HER performance of nanotube-loaded bulky material get worse due to the disadvantage of specific surface area .
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Xiaomeng Yang,Yajiao Cui,Yingyu Qi,Luyan Fu,Armin Rezayan,Chunbao Charles Xu,Jianshe Wang,Dong Sui,Yongsheng Zhang
The rapid development of consumer electronics, electric vehicles, and smart meters demands high-performance energy storage devices. By now, supercapacitors are expected to become one of the most promising energy devices for future energy technology. In this work, NiO nanoparticles supported on activated carbon nanofibers (NiO/ACNFs) have been synthesized by atomic layer deposition technique, which is directly used as self-supporting binder-free electrodes for supercapacitors. Scanning electron microscopy, transmission electron microscopy , X-ray photoelectron spectroscopy, and Raman results show that NiO nanoparticles (3.1 nm) are uniformly coated on ACNFs. The NiO/ACNFs-600 electrodes demonstrate a specific capacitance of 870 F·g −1 (1 A·g −1 ) and good rate capability (remain 67% at 10 A·g −1 ). The asymmetric supercapacitor devices with NiO/ACNFs-600//ACNFs electrodes yield a fairly high energy density of 39.85 Wh·kg −1 at 2000 W·kg −1 and excellent capacitance retention of 87% after 10,000 cycles. The excellent electrochemical capacitance performance for NiO/ACNFs is attributed to the high conductivity and large specific surface area of ACNFs, high capacity, small size, and even dispersion of NiO as well as the synergistic effect between them. These results demonstrate that NiO/ACNFs can serve as excellent electrode materials for high-performance asymmetric supercapacitors.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2013
·Vol. 15
·期 11
·3057-3063
·
IF 6.828
Feng Chen,Wenjing Zhou,Hongfei Yao,Ping Fan,Jintao Yang,Zhengdong Fei,Mingqiang Zhong
We demonstrate the self-assembly of highly dispersed NiO nanoparticles embedded in lignin-derived mesoporous carbon (MPC) frameworks. Self-assembly is induced by evaporation of the solvent from a mixture of metal-containing liquid crystalline mesophases of lignin-derived polymers and transition metal nitrate hydrate, which yielded NiO@MPC nanostructures at 600 °C under a N2 atmosphere. The microstructure and morphology of the NiO@MPC are characterized by XRD, TEM and BET. The results show that the NiO nanoparticles are highly dispersed in a mesoporous carbon matrix. The NiO@MPC composites show metal oxide contents in the range 49–79 wt%, high surface areas (503–802 m2 g−1), uniform pore sizes (≈3.7 nm), various porous distributions and large pore volumes (0.46–0.68 cm3 g−1). Electrochemical studies were carried out by measurement of cyclic voltammetry (CV) and charge–discharge tests. The results demonstrate that the NiO@MPC composites have high specific capacitance (880.2 F g−1 at a current density of 1.0 A g−1) and display good retention. 90.9% of the specific capacitance is retained when the current density changes from 1 A g−1 to 10 A g−1 in the charge–discharge tests and 93.7% of the specific capacitance is retained after 1000 charge–discharge cycles. Thus, the NiO@MPC composites are promising supercapacitor electrode materials.
研究领域:
材料科学
·
纳米科技
·
电化学
·
能源存储
·
功能材料
·
碳材料
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jiawei Hu,Jiaming Li,Zhongyi Pu,Wen Xiao,Huan Yu,Zhihao Zhang,Fang Yu,Chao Liu,Qinfang Zhang
Heterostructured visible-light-responsive photocatalysts represent a prospective approach to achieve efficient solar-to-chemical energy conversion. Herein, we propose a facile self-assembly technique to synthesize NiO nanoparticles/C 3 N 5 nanosheets (NOCN) heterojunctions for hydrogen (H 2 ) evolution catalysis and hydrogen peroxide (H 2 O 2 ) production under visible light. In this regard, the black NiO nanoparticles (NPs) were tightly anchored on the surface of C 3 N 5 nanosheets (CNNS) to construct S-scheme NOCN heterojunction, enabling efficient charge separation and high redox capability. Obtained results elucidated that the incorporated NiO NPs significantly promote light-harvesting efficiency and photo-to-thermal capacity over the NOCN composites. The enhanced photothermal effect facilitates the charge carrier transfer rate across the heterojunction and boosts the surface reaction kinetics. Accordingly, the photocatalytic performances of CNNS for H 2 release and H 2 O 2 production can be manipulated by introducing NiO NPs. The modified photocatalytic properties of NOCN composites are ascribed to the synergistic effects of all integrated components and the S-scheme heterojunction formation. Impressively, the high H 2 evolution photocatalysis efficiency of NOCN nano-catalysts in seawater certifies their potential environmental applicability. Among all, the 12-NOCN nano-catalyst exhibits a higher photocatalytic efficiency for H 2 release (112.2 μmol∙g −1 ∙h −1 ) and H 2 O 2 production (91.2 μmol∙L −1 ∙h −1 ). Besides, the 12-NOCN nano-catalyst reveals excellent recyclability and structural stability. Additionally, the possible mechanism for photothermal-assisted photocatalysis is proposed. This work affords a feasible pathway to design photothermal-assisted S-scheme heterojunctions for diverse photocatalytic applications.
研究领域:
光催化
·
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
·
2016
·
IF 2.435
Xiaowei Li,Ruixue Chen,Huidong Sui,Xiaoxian Yuan,Meng Li,Kun Yang,Ling Li,Wenming Zhang,Yucang Zhang
Flower-like NiO nanoparticles was successfully synthetized by homogeneous precipitation. A novelty modified (CH 3 ) 4 N) 2 S/((CH 3 ) 4 N) 2 S n electrolyte was introduced in solar cell successfully and NiS was used as the counter electrode. Moreover, CdSe sensitized p-type NiO was synthesized by chemical bath deposition (CBD) in a precursor solution to ensure the nanosized flower-like NiO films obtain a better uniformity and high penetration. Meanwhile, a series of parallel experiment were designed to investigate the effect of different CdSe deposition layers on the photoelectric characteristic of the cell. The result showed that when the film was eight layers, the maximum efficiency of 1.06% had been achieved, with a significantly open circuit voltage ( V oc ) of 0.755 V, a fill factor (ff) of 0.27% and a short circuit current density ( J sc ) of 5.21 mA cm −2 .
研究领域:
材料科学
·
光伏技术
·
纳米技术
·
电化学
✓ 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）