SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Xiaoying Zhou,Shiyu Fang,Tiantian Zhang,Zuliang Wu,Jing Li,Wei Wang,Jiali Zhu,Junliang Wu,Daiqi Ye,Rui Han,Qingling Liu,Shuiliang Yao,Erhao Gao,Dayu Wu
The development of non-noble metal catalysts for low-temperature CO oxidation is a pivotal subject in various disciplines. In this study, an optimized Mn-doped NiO catalyst (Mn-NiO-0.5), prepared via aerosol pyrolysis with an equal molar ratio of Ni to Mn, demonstrates remarkable performance. It achieves an 82 % CO conversion at -20 °C and a 100 % conversion between 10 °C and 800 °C. The catalyst’s turnover frequency ( TOF ) for CO oxidation significantly surpasses that of previously reported noble-metal-based catalysts, underscoring its superior efficiency. Dynamic analyses suggest that the enhanced catalytic activity is a result of the unique atom burr structure, which presents an extensive surface area replete with abundant active sites. This structural feature is instrumental in maximizing the catalyst’s interaction with CO molecules. Experimental findings, corroborated by density functional theory (DFT) calculations, elucidate the mechanism of CO oxidation on the Mn-NiO-0.5 catalyst. The process is facilitated by the synergistic action of bimetallic sites, where the Ni–OH site acts as the primary adsorption point for CO. Subsequently, the CO is oxidized to bicarbonate through the interaction with the oxygen (O or O 2 ) at adjacent Mn sites. This pioneering study introduces a paradigm-shifting insight: the effectiveness of non-noble metal oxide catalysts can now compete with, and in some cases, outperform their noble metal counterparts. This breakthrough is set to transform the industry, presenting a compelling alternative to conventional noble metal catalysts and propelling the evolution of state-of-the-art environmental conservation technologies.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
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IF 9
Jiayu Feng,Ruoxu Liu,Xuejin Yang,Shuo Cui,Rui Cao,Ping Ning,Fang Wang,Zibin Pan,Lijuan Jia
Efficient removal of the highly toxic gas phosphine (PH 3 ) from various exhaust gases is a major challenge. To address this, we developed a cost-effective NiO/TiO 2 adsorbent (Ni X /TiO 2 ) via facile impregnation, achieving efficient anaerobic PH 3 removal at a low temperature (350 °C) with an exceptional breakthrough capacity of 232.23 mg(PH 3 ) g −1 . Characterization revealed that superior performance stems from abundant surface basic sites, developed porosity, and strong NiO-TiO 2 interfacial interactions promoting PH 3 adsorption and dissociation. During PH 3 capture, phosphorus incorporation transforms active NiO into Ni 2 P species, leading to adsorbent deactivation. Crucially, recognizing the photocatalytic potential of both TiO 2 and Ni 2 P, we repurposed the spent adsorbent as a Ni 2 P/TiO 2 heterojunction photocatalyst. Proof-of-concept experiments demonstrated its high efficacy in visible-light-driven wastewater treatment, achieving 91 % degradation of malachite green (MG). This work advances PH 3 purification technology while establishing a sustainable circular economy strategy via repurposing deactivated adsorbents into photocatalysts, aligning with resource conservation and recycling.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Xiong Yang,Lu Wu,Yi-Yuan Wang,Bing-Bing Jia,Yu-Xuan Xiao,Ge Tian,Jie Ying,Yi Lu,Si-Ming Wu,Wei Geng,Fei Yu,Ling Shen,Ion Tiginyanu,Xiao-Yu Yang
Creating an abundance of OH * active sites on the surface of an electrocatalyst is an ideal approach for improving both its performance and Cl – corrosion resistance in seawater splitting to generate hydrogen via the hydrogen evolution reactions (HER). However, the development of strategies for designing coordinatively saturated metals that have these sites remains a significant challenge. Herein, we report on the development of NiO/Pt 3 Ni-300, a coordinatively unsaturated NiO incorporated Pt 3 Ni, which has the ability to capture large numbers of surface hydroxyl groups during the HER in seawater and, in consequence of this, it exhibits high electrocatalytic activity in seawater. Additionally, benefiting from super-hydrophilicity induced by its rich OH * surface, NiO/Pt 3 Ni-300 preferentially adsorbs H 2 O over Cl – . The outstanding HER performance of this catalyst in alkaline seawater is reflected by a low overpotential of 16 mV to drive a current density of 10 mA cm −2 , and a 7.7-fold higher turnover frequency compared to that of Pt/C. Moreover, it displays only a small 41 mV drop in overpotential after promotion of the HER for 20 h in alkaline seawater, a value that surpasses those inherent to commercial Pt/C, Pt 3 Ni, and crystalline NiO incorporated Pt 3 Ni.
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高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Yang-Yang Xie,Hui-Jun Chen,Qi-Yao Bai,Xiu-Li Wang,Gang Wu,Si-Chong Chen,Yu-Zhong Wang
Although NiO has attracted intensive attention as promising active materials for hybrid supercapacitor (HSC) and HER/OER electrocatalysts, efficiently utilizing the NiO-based electrodes with high mass loading is still a challenge. Herein, we design a battery-type electrode, i.e., NiO nanofibers clad nickel foam (NiO/NF), by facile, low-cost, and eco-friendly etching and oxidation under ambient conditions. Thanks to the in-situ growth of NiO nanofibers on NF and its ultrahigh mass loading of 17.4 mg cm −2 , the binder-free NiO/NF electrode shows excellent performance in HSC and overall water-splitting. An ultrahigh areal capacity ( C A ) of 3.84 mAh cm −2 (gravimetric capacity of 220.7 mAh g −1 ) is obtained at 2 mA cm −2 , which is 1255 times more than pristine NF (0.00306 mAh cm −2 ). Even at 100 mA cm −2 , C A can reach 1.38 mAh cm −2 . Hybrid supercapacitor assembling with graphene oxide (GO) delivers a peak energy density of 2572.2 Wh m −3 and possesses good cycling stability of 110% retention after 6000 cycles. Moreover, NiO/NF electrode displays low overpotentials of 69.9 mV and 262 mV at 10 mA cm −2 for HER and OER, respectively. NiO/NF||NiO/NF electrolyzer outputs 10 mA cm −2 at only 1.57 V with long-term durability for 50 h.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
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IF 6.14
Guohua Zhu,Kui Wu,Liang Tan,Weiyan Wang,Yanping Huang,Diyu Liu,Yunquan Yang
Magnetic colloidal sol was first prepared and added in the mixed solution of Ni(NO3)2 and Al(NO3)3. After the constant-pH coprecipitation and calcination, magnetic NiO–Al2O3@Fe3O4 mixed oxides were formed and used as supports for Pt-based catalysts. The activities of these magnetic Pt/NiO–Al2O3@Fe3O4 catalysts were tested in the hydrodeoxygenation (HDO) of phenols such as 4-ethylphenol, 4-methylphenol, and guaiacol. These exhibited high HDO activity, and aromatic hydrocarbons were produced through a coupling process of hydrodeoxygenation and dehydrogenation. The addition of Fe enhanced both the conversion and aromatic hydrocarbons selectivity, which was attributed to the electron transfer between metallic Pt and Fe. For example, after the liquid phase HDO of 4-ethylphenol at 300 °C and 2.0 MPa for 1.5 h, 97.9% conversion and 18.3% toluene selectivity were obtained. When the reaction time was prolonged to 8 h, ethylbenzene selectivity increased to 88.0%. Moreover, these Pt/NiO–Al2O3@Fe3O4 catalysts were easily recycled from the liquid reaction mixture by employing an external magnet, but the dehydrogenation stability needs to be further improved.
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Micro & Nano Letters
·
2020
·Vol. 15
·期 8
·540-544
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IF 0.975
Mengsi Song,Chaoqian Liu,Nan Wang,Tingting Lun,Xiaona Zhai,Qing Ge,Xiaoyang Zhang,Sumei Wu,Shimin Liu,Hualin Wang,Weiwei Jiang,Wanyu Ding
The sol–gel method based on the rapid pyrolysis process was adopted to prepare Ni 1− x Cu x O ( x = 0–0.1) films on glass substrates. The effects of Cu doping on the structural, morphological, electrical and optical properties of the films were characterised by X-ray diffractometer, scanning electron microscope, Hall effect instrument and ultraviolet-visible spectrophotometer, respectively. The NiO-based films have a cubic rock salt structure and it was found that the film with x = 0.06 should have minimal residual stress. The transmittance and bandgap of the films decreased with increasing Cu-doping concentration. In addition, the compactness of the films increased along with the increase of Cu-doping concentration as a whole. The carrier concentration of the films was almost invariable, but the carrier mobility was determined by the competition between the effects of the morphology and the ionised impurity scattering. The resistivity of the films first decreases and then increases, and the minimum resistivity was 182.1 Ω cm at x = 0.06.
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高影响因子
OPTICAL MATERIALS
·
2026
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IF 4.3
Shanxin Xiong,QingQing He,Xin Cui,Xicheng Lu,Chunxia Hua,Ming Gong,Jia Chu
Nickel oxide (NiO), as a typical anodic electrochromic material, has been widely employed in complementary electrochromic devices (CECDs) with tungsten oxide (WO 3 ) because of its excellent charge compensation capability and reversible redox behavior. However, its poor electrical conductivity and sluggish ion diffusion kinetics hinder further improvements in electrochromic performance. In this work, carbon quantum dots (CQDs) were introduced into the NiO electrochromic system to fabricate NiO/CQDs composite films, and the regulatory mechanism of CQDs on the electrochromic behavior of NiO was systematically investigated. The results demonstrate that the incorporation of CQDs preserves the intrinsic crystal structure of NiO while significantly improving its interfacial electrochemical properties. Specifically, CQDs reduce the charge-transfer resistance, accelerate electron transport, enhance redox activity and charge storage capability, promote Li + diffusion, and improve electrochemical reaction kinetics. Moreover, the increased proportion of electrochemically active Ni 3+ species enhances the pseudocapacitive behavior of NiO. Benefiting from these synergistic effects, the NiO/CQDs composite film exhibits a 20% increase in optical modulation, 53%/10% faster coloration/bleaching response, and a 28% improvement in cycling stability compared with pristine NiO. Furthermore, the assembled WO 3 -NiO CECD delivers an areal charge capacity of 58.75 mC cm −2 , a coloration efficiency of 157.72 cm 2 C −1 , rapid response times of 2.7 s/1.6 s, and superior cycling stability. This work elucidates the enhancement mechanism of CQDs from the perspectives of electron transport, Ni valence regulation, and ion diffusion kinetics, providing a theoretical basis for the design of high-performance CECDs.
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高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Honglin Qin,Yuan Tao,Ruiting Niu,Bingyan Han,Lizhen Qiao
In this work, magnetic flower-like and fluorine-doped nickel oxide composites Fe 3 O 4 @SiO 2 @F/NiO were prepared and applied for the magnetic solid-phase extraction (MSPE) of five imidazole fungicides. The obtained materials were characterized by scanning electron microscopy, X-ray diffraction, energy-dispersive X-ray photoelectron spectroscopy and Brunauer-Emmett-Teller analysis to verify the successful synthesis. The effect of some experimental parameters on the extraction efficiency were explored to optimize the MSPE conditions, including the adsorbent dosage, ultrasonic time, salt concentration, sample solution pH, elution solvent type and volume. Then, method validation was performed under the optimal conditions in combination with high-performance liquid chromatography-ultraviolet detection. The determination coefficients ranged from 0.9956 to 0.9991, and the limits of detection and limits of quantification for the imidazole fungicides were 0.1–3 μg·L −1 and 0.3–10 μg·L −1 , respectively. Moreover, the intra-day and inter-day precisions were evaluated in three different concentrations with relative standard deviations in the range of 1.34 %-13.31 % and 4.96 %-13.92 %. At last, the proposed MSPE method was used to enrich and determine imidazole fungicides in tap water, milk and green tea samples, and the spiked recoveries were in the range of 77.93 %-119.38 %, demonstrating the potential of the method in the determination of imidazole fungicides from real samples.
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POLYMER DEGRADATION AND STABILITY
·
2023
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IF 5.9
Zheng Li,Zuodong Qin,Chunxuan Li,Guimei Zhang,Aozheng Zhang,Sisi Li,Guoqi Liang,Xin Wang,Wufei Tang
Nano calcium carbonate (CaCO 3 ) was successfully treated by tetrabutyl titanate sol together with nickel hydroxide, followed by calcination to form a new kind of flame retardant (Ni-TiO 2 @CaCO 3 ). After study of the Ni-TiO 2 @CaCO 3 structure, it was then introduced into epoxy resin (EP) to improve the flame retardancy and thermal stability. The results shown that NiO and TiO 2 were supported on the surface of the CaCO 3 , and 5 wt% CaCO 3 could enhance the flame retardancy and Ni-TiO 2 @CaCO 3 further increased the flame retardancy of the EP composites. In the cone calorimeter test (CCT), the values of the peak heat release rate (pHRR) and smoke production rate (pSPR) were reduced to 769 kW/m 2 and 0.32 m 2 /s by CaCO 3 from 1101 kW/m 2 and 0.39 m 2 /s of the raw EP respectively. Moreover, pHRR and pSPR values were further decreased to 511 kW/m 2 and 0.25 m 2 /s by Ni-TiO 2 @CaCO 3 respectively. Although the degradation temperature values were lower than that of the control EP, the temperature values at 5 and 50% mass loss for Ni-TiO 2 @CaCO 3 /EP composites were improved compared to the EP. In addition, the char residues value of the Ni-TiO 2 @CaCO 3 / EP composite (23.5%) was obviously improved compared to that of the EP (13.0%) and CaCO 3 / EP composite (16.4%). In addition, the flame retardancy mechanism of the Ni-TiO 2 @CaCO 3 / EP composite was thoroughly analyzed by TGA-FTIR, FITR and Raman methods. This work provides a promising evaluation strategy for utilizing CaCO 3 and its derivatives for possible treatment of EP to enhance its flame retardancy and thermal stability.
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高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2021
·Vol. 45
·期 10
·15544-15556
·
IF 5.164
Xuerui Yi,Fengxiang Yin,Xiaobo He,Guoru Li
Summary Water splitting driven by renewable energy represents a sustainable way to store clean energy. However, its efficiency is limited by the kinetically sluggish oxygen evolution reaction (OER), calling for highly active catalysts to accelerate the reaction rate. Herein, NiO is reduced by cellulose through a hydrothermal method to obtain the highly active OER catalysts. The obtained cellulose-partially-reduced-NiO (CL-prNiO) shows a hybrid structure, composed of 3.6 wt.% face-centered cubic (fcc) Ni and 96.4 wt.% rock salt structured NiO with highly disordered interface. The CL-prNiO delivers a current density of 10 mA cm −2 with an overpotential of 288 mV, which is comparable to the commercial RuO 2 and outperforms many of the recently reported Ni-NiO based OER catalysts. As benefited from the hybrid and disordered structure, CL-prNiO shows great ability of converting Ni 2+ to Ni 3+ at a potential prior to the OER onset. The in situ generated Ni 3+ species can activate the lattice oxygen in the unreduced NiO of CL-prNiO, significantly boosting the OER activity.
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CATALYSIS LETTERS
·
2021
·Vol. 151
·期 10
·3067-3078
·
IF 3.186
Zhu Ying,Yang Jiandong,Bian Chang,Yang Wenshu,Meng Xianwei,Liu Zhiyan,Li Ying,Zhao Yingying,Fu Wuyou,Yang Haibin
Abstract A new strategy to enhance the photocatalytic properties of graphitic carbon nitride is reported via constructing an effective NiO decorated Ti/TiO 2 NT/TiO 2 /g-C 3 N 4 S-scheme heterostructure photocatalyst thin film (Ti/TiO 2 NT/TiO 2 /g-C 3 N 4 /NiO). This thin film photocatalyst can separate hydrogen gas and oxygen gas into different sides of the Ti substrate. Owing to the synergistic effect of the NiO as co-catalyst and the formation of Step-scheme (S-scheme) heterojunction between g-C 3 N 4 and TiO 2 , the electrons and holes were successfully separated to their opposing active centers, which is beneficial to inhibiting the recombination of the charge carriers. The gas evolution rate of Ti/TiO 2 NT/TiO 2 /g-C 3 N 4 /NiO is 7.97 μmol h −1 cm −2 under the irradiation of high-pressure mercury lamp, which was 3 and 1.3 times as high as that of the Ti/TiO 2 NT/g-C 3 N 4 and Ti/TiO 2 NT/TiO 2 /g-C 3 N 4 , respectively. Firstly, benefiting from the well-matched band structure, a direct S-scheme Ti/TiO 2 NT/g-C 3 N 4 heterojunction thin film is constructed easily driven by the built-in electric field across the Ti/TiO 2 NT/g-C 3 N 4 interface. Furthermore, the introduction of the TiO 2 layer on the TiO 2 NT will broaden light absorption range and increase the heterojunction area, which in turn conduces to effective charge separation. In addition, NiO as a co-catalyst cannot only accelerate the charge separation but also provide plentiful catalytic sites and decompose H 2 O 2 produced by g-C 3 N 4 . The thin film photocatalysts can be recycled again, which is different from traditional powdered photocatalysts. This work constructs a NiO decorated Ti/TiO 2 NT/TiO 2 /g-C 3 N 4 S-scheme heterostructure photocatalyst thin film, and provides a new insight to promote photocatalytic activity of g-C 3 N 4 under the synergetic impact of S-scheme heterostructure and NiO co-catalyst. Graphic Abstract
A novel NiO decorated Ti/TiO 2 NT/TiO 2 /g-C 3 N 4 S-scheme heterostructure photocatalyst thin film was fabricated to enhance photocatalytic activity for water splitting.
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高影响因子
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.
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危险品化学品经营许可证（带存储）