JOURNAL OF PHYSICAL CHEMISTRY A
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2018
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IF 2.836
Shuyan Wang,Lin Du,Jianqiang Zhu,Narcisse T. Tsona,Shijie Liu,Yifeng Wang,Maofa Ge,Wenxing Wang
Allyl acetate (AA) is widely used as monomer and intermediate in industrial chemicals synthesis. To evaluate the atmospheric outcome of AA, kinetics and mechanism of its gas-phase reaction with main atmospheric oxidants (O3, OH, Cl, and NO3) have been investigated in a Teflon reactor at 298 ± 3 K. Both absolute and relative rate methods were used to determine the rate constants for AA reactions with the four atmospheric oxidants. The obtained rate constants (in units of cm3 molecule–1 s–1) are (1.8 ± 0.3) × 10–18, (3.1 ± 0.7) × 10–11, (2.5 ± 0.5) × 10–10, and (1.1 ± 0.4) × 10–14, for reactions with O3, OH, Cl, and NO3, respectively. While results for reactions with O3, OH and Cl are in good agreement with previous studies, the kinetics for the reaction with NO3 is reported for the first time in this study. On the basis of determined rate constants, the tropospheric lifetimes of AA are τO3 = 9 days, τOH = 5 h, τCl = 5 days, τNO3 = 2 days. On the basis of the products study, reaction mechanisms for these oxidations have been proposed and the reaction products were detected using thermal desorption–gas chromatography–mass spectrometry (TD–GC–MS) and Fourier transform infrared spectroscopy (FTIR). Results show that the main products formed in these reactions are carbonyl compounds. In particular, 2-oxoethyl acetate was detected in all four AA oxidation reactions. Compared to previous studies, several new products were determined for reactions with OH and Cl. These results form a set of comprehensive kinetic data for AA reactions with main atmospheric oxidants and provide a better understanding of the degradation and atmospheric outcome of unsaturated acetate esters in the troposphere, during both daytime and nighttime.
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高影响因子
Journal of Experimental Nanoscience
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2012
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IF 1.011
Zhongping Chen
The precursors used to prepare high-quality nanoparticles by high-temperature decomposition are expensive and toxic organometallic compounds. Fe(OH)3, an inexpensive and environmentally friendly iron-containing compound, is for the first time introduced to act as an precursor to generate monodisperse iron oxide nanoparticles. The obtained nanoparticles are characterised by transmission electronic microscopy, IR, XRD and vibrating sample magnetometer. Organic-soluble ferromagnetic rod-like and superparamagnetic dot-like nanoparticles with the size ranging from 12 to 25 nm are obtained in a nonpolar solvent by adjusting reaction parameters, such as surfactant concentration and reaction time. Water-soluble nanoparticles can be synthesised when a bipolar solvent is used instead of nonpolar solvent. The results show that Fe(OH)3 is a promising precursor for the high-temperature decomposition method.
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高影响因子
ACS Nano
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2024
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IF 15.8
Zhaoxi Liu,Yapeng Tian,Jian Yang,Song Xu,Qingyong Tian,Pengfei Yan,Buxing Han,Qun Xu
Regulating the surface termination of a confined space to achieve ultrafast ion transport remains an ongoing challenge. Two-dimensional (2D) MXenes possess adjustable structures and interlayer spacing, which provide an ideal platform for in-depth investigation of ion transport in 2D confined space; however, the strong interaction of the negatively charged terminations in MXenes hinders the transport of intercalated cations. In this work, we proposed a strategy that precisely regulates the surface modification of Ti3C2Tx MXene with the weak polarity of boron atoms (SCB-MXene) via the distinct effect of supercritical CO2. This not only could effectively substitute −OH termination in MXene but also can prevent the loss of −O active sites, and then, both ultrafast ion transport and high volumetric capacitance can be achieved simultaneously. Ideally, a volumetric capacitance up to 742.7 C cm–3 at 1000 mV s–1 for the SCB-MXene film as pseudocapacitive materials that provides an energy density of 66.3 Wh L–1 even at an ultrahigh power density of 132.5 kW L–1 is obtained, which is a prominent record of energy density and power density reported up to now. Subsequently, it can be used in large-scale energy storage and conversion devices.
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高影响因子
Journal of Energy Storage
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2023
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IF 9.4
Xiaowei Wu,Xin Dong,Ziqin Liu,Xinyi Wang,Pu Hu,Chaoqun Shang
Although the Li metal anode has a high theoretical capacity and low potential, the uncontrolled growth of Li dendrites and the significant volume variation of the Li anode prevent the practical deployment of lithium metal batteries (LMBs). To effectively control the Li dendrite growth with suppression, in this contribution, the Ni(OH) 2 nanosheets modified Prussian blue tubes (PBT/Ni(OH) 2 ) are employed to construct a three-dimensional framework (3D) on the surface of Li. The PBT can homogenize the Li + flux, while the Ni(OH) 2 nanosheets provide sufficient space to accommodate the volume change of Li. Thus, the growth of Li dendrites is largely suppressed compared to pristine Li. In detail, with the introduction of PBT/Ni(OH) 2 , the Li||Li cells provide 500 h of consistent cycling performance at 1 mA cm −2 , while the Li||Li 4 Ti 5 O 12 (LTO) cells also exhibit superior cycle reversibility over 450 cycles at 175 mAh g −1 .
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高影响因子
ChemElectroChem
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2017
·Vol. 4
·期 9
·2314-2320
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IF 4.136
Cong Zhou,Lina Lin,Yuzhu Ma,Liyan Huang,Jun Li,Zhengping Liu,Zhaoxia Dong
The amorphous mesoporous Ni(OH) 2 hollow spheres (Ni(OH) 2 -HSs) with waxberry-like morphology were fabricated by using a facile hydrothermal method with poly(styrene-acrylic acid) spheres as the template, followed by extraction of the template. In the hydrothermal process, Ni(NO 3 ) 2 ⋅6H 2 O was employed as the precursor of Ni(OH) 2 . SEM, TEM, XPS, XRD, and N 2 adsorption-desorption isotherm techniques were used to characterize the structure and morphology of Ni(OH) 2 -HSs. The obtained Ni(OH) 2 -HSs have a uniform morphology with an average diameter of 300 nm and shell thickness of about 25 nm. The mesoporous shells of the Ni(OH) 2 -HSs are composed of amorphous Ni(OH) 2 particles. When used as an electrode, the as-prepared Ni(OH) 2 -HSs exhibit pseudocapacitive behavior with a high specific capacitance of 2559 F g −1 at a scan rate of 1 mV s −1 and a good capacitance retention of 91.8% after 1000 cycles at a current density of 5 A g −1 . These results suggest promising applications of the waxberry-like amorphous Ni(OH) 2 hollow spheres in electrode materials for supercapacitors. Graphical Caps off : Amorphous mesoporous Ni-(OH) 2 hollow spheres (Ni-(OH) 2 -HSs) with a waxberry-like morphology are fabricated through a facile hydrothermal method by using poly-(styrene-acrylic acid) spheres as a template, followed by extraction of the template. When used as an electrode, the as-prepared Ni-(OH) 2 -HSs exhibit pseudocapacitive performances with a high specific capacitance and a good capacitance retention. These results suggest promising applications of the waxberry-like amorphous Ni-(OH) 2 hollow spheres in electrode materials for supercapacitors.
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高影响因子
CHEMOSPHERE
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2021
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IF 7.086
Weiwei Guo,Tianqi Li,Qianru Chen,Junfeng Wan,Jie Zhang,Bo Wu,Yan Wang
The UV lights of different wavelengths were performed in boosting hydroxyl radicals ( OH) generation from traditional Fenton reagent for the gaseous toluene removal. The Fenton, UV 254 /Fenton and UV 365 /Fenton processes were first adopted to eliminate gaseous toluene through the bubble column reactor, respectively. The stable toluene removal efficiency in 60 min was 85.31% in the UV 365 /Fenton process, which was higher than other processes. The gaseous toluene was mainly oxidized into CO 2 rather than other gaseous intermediates in the UV 365 /Fenton process. For UV 365 /Fenton process, the GC-MS tests were carried out to figure out the aqueous intermediates of gaseous toluene removal. The OH concentration in the UV 365 /Fenton process was the highest among all the parallel tests via the EPR experiments and the quantificational measurements with coumarin as the probe. The iron ion in the aqueous solution was systematically evaluated with the experiments proceeding. The evolution of iron ion in the aqueous solution indicated that the fast reduction of Fe 3+ to Fe 2+ was assisted with 365 nm UV rather than 254 nm UV, which played a key point in the high gaseous toluene removal efficiency. This study demonstrated that the combination of UV 365 irradiation and Fenton in the wet scrubbing reactor performed a synergistic effect on the gaseous toluene removal.
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2026
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IF 4.5
Xiaojia Wu,Sobhan Chatterjee,Bei Liu,Hong-Shang Peng,Feng Teng
A multifunctional mesoporous silica nanoplatform was constructed for synergistic photo-chemodynamic therapy. • WO 3-x adsorb hydroxyl radicals to enhance chemodynamic therapy, while Cu(II) depletes glutathione to reduce ROS scavenging and boost oxidative stress. • The nanoplatform achieves 80% in vitro cell inhibition and 73.9% in vivo tumor growth inhibition via synergistic PDT/CDT. Combination photo-chemodynamic therapy (PDT/CDT) represents a promising anticancer strategy that synergistically generates reactive oxygen species (ROS) through light activation and Fenton-like reactions. However, the therapeutic efficacy of ROS is often compromised by overexpressed glutathione (GSH) and the ultra-short lifetime of hydroxyl radicals (•OH). To address these challenges, we developed a novel mesoporous silica-based nanosystem integrating a Fenton catalyst Cu(II), oxygen-vacancy-rich tungsten oxide (WO 3-x ), and the photosensitizer zinc phthalocyanine. The nanosystem enhances oxidative damage through Cu(II)-mediated GSH depletion and WO 3-x -facilitated adsorption and stabilization of •OH via oxygen vacancy trapping, in addition to the synergistic PDT/CDT effect. Following conjugation with a mitochondria-targeting ligand, the nanosystem was evaluated in vitro and in vivo , achieving a cell inhibitory rate of 80% and a tumor growth inhibition rate of 73.9%, demonstrating high therapeutic efficacy. These results indicate that the as-synthesized multifunctional nanosystem with enhanced oxidative capacity holds great promise as a PDT/CDT nanoagent for tumor ablation. A mesoporous silica-based nanoplatform co-delivering Cu(II) Fenton catalyst, oxygen-deficient WO 3-x , and ZnPc photosensitizer with mitochondria-targeting TPP ligand achieves synergistic photo-chemodynamic therapy by depleting GSH, enhancing •OH and 1 O 2 production, and suppressing tumor growth by 73.9%. Download: Download high-res image (324KB) Download: Download full-size image
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2026
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IF 4.4
Tingyang Ming,Miao Hu,Wei Zhu
Non-equilibrium adsorption contributes to post-illumination TC removal. • Bi 2 WO 6 /Ni(OH) 2 shows enhanced adsorption and photocatalytic kinetics. • Charge storage is unlikely to dominate the dark-stage behavior. • Acid extraction reveals adsorption-related surface retention of TC. • Light-off timing supports adsorption relaxation after photocatalysis. The photocatalytic removal of antibiotic pollutants has been widely investigated for water purification, where continued pollutant decay after light irradiation (“dark-stage removal”) represents an intriguing post-illumination phenomenon in photocatalytic systems. Although charge storage provides an important explanation for post-illumination activity, adsorption relaxation after light-off may also contribute to dark-stage removal. In this work, a Ni(OH) 2 -modified Bi 2 WO 6 system was employed as a representative model to investigate non-equilibrium adsorption in photocatalytic dark-stage tetracycline removal. The photocatalytic performance under visible light was first evaluated to establish a high-activity reaction system. Subsequently, a combination of acid extraction, solution–surface distribution analysis, and charge probing experiments was used to clarify the contributions of adsorption redistribution and charge storage. The results demonstrate that charge storage is negligible and unlikely to dominate the dark-stage behavior in the Bi 2 WO 6 /Ni(OH) 2 system. Instead, the apparent dark-stage removal is primarily governed by a non-equilibrium adsorption process, arising from the imbalance between rapid photocatalytic consumption and adsorption–desorption dynamics during illumination. After light-off, the system gradually relaxes toward equilibrium, leading to continued redistribution of tetracycline from the solution to the catalyst surface. This work reveals a photocatalysis-induced non-equilibrium adsorption pathway for dark-stage removal, providing a complementary perspective for understanding post-illumination behavior in photocatalytic systems. Download: Download high-res image (181KB) Download: Download full-size image
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2026
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IF 4.6
Sheng Liang,Zhihao Wang,Kunhong Hu,Lei Hu,Lili Wang,Lingli Liu,Ningning Zhou,Jiage Yu,Bin Chen,Xin Liang
Lithium‑sulfur (Li S) batteries based on lithium sulfide (Li 2 S) cathodes hold great promise for next-generation energy storage devices but suffer from critical drawbacks, including lithium polysulfides (LiPSs) shuttling, sluggish redox reaction kinetics, and severe safety hazards. Here, a multifunctional separator is designed by coating a nickel hydroxide (Ni(OH) 2 ) nanoflakes-decorated kelp-like porous carbon (Ni(OH) 2 /KLPC) composite onto a polypropylene (PP) membrane. The unique KLPC skeleton derived from mucor hyphae provides a three-dimensional conductive network, while the polar Ni(OH) 2 nanoflakes offer strong chemisorption for LiPSs and high catalytic activation for the interconversion between solid-phase (Li 2 S and S) and liquid-phase (LiPSs). Meanwhile, the Ni(OH) 2 nanoflakes endow the separator with remarkable flame retardancy through an endothermic decomposition process and the formation of highly flame-retardant products nickel oxide and water. Consequently, the Li S battery assembled with the Ni(OH) 2 @KLPC modified PP (Ni(OH) 2 /KLPC/PP) separator and a Li 2 S/multi-walled carbon nanotube cathode delivers a high initial discharge capacity of 1132 mAh g −1 , remarkable rate property of 320 mAh g −1 at 5.0 A g −1 , and stable long-term cycling over 750 cycles. This work presents a promising synergistic strategy for constructing high-performance and safe Li S batteries through multifunctional separator engineering.
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
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2026
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IF 2.8
Li Qiu,Zhang Tingting,Wang Yu,Li Xi,Nie Congcong,Lv Changpeng,Song Jingjing,Huang Qihao,Wu Fang
Ni(OH) 2 is considered as one of most promising oxygen evolution reaction (OER) catalysts owing to its low cost and earth abundance. Nevertheless, the low conductivity and poor intrinsic activity of Ni(OH) 2 seriously restricts its industrial application. Meanwhile, the relationship between the structure, OER activity of Ni(OH) 2 -based catalysts, and transition-metal dopants is still unclear. To meet above challenges, a series of Ni(OH) 2 –M (M = Fe, Al, Co, Cr) was prepared by a simple hydrothermal method. The experimental results confirmed that the incorporation of different metal elements into Ni(OH) 2 can not only alter the morphology and modulate electronic structure but also improve the intrinsic catalytic activity. Particularly, the Ni(OH) 2 –Fe exhibits the best OER activity, requiring 252 mV and 288 mV at 10 mA cm −2 and 100 mA cm −2 , with a Tafel slope of 39.1 mV dec −1 and superior stability (50 mA cm −2 for 30 h). This work provides a pathway to understand the relationship between structure, OER activity of Ni(OH) 2 -based catalysts, and incorporation of transition-metal elements, which facilitates the development of advanced OER electrocatalysts.
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高影响因子
APPLIED SURFACE SCIENCE
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2026
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IF 6.6
Liang Luo,Qi Shen,Lixing Wang,Huiluan Qin,Song Lu,Yeqing Wang,Jiadi Ying,Tiancun Liu,Min Guo,Zhixin Yu
Hierarchical Co(OH) 2 /FeOOH is constructed via a facile one-step heterogeneous nucleation strategy. • Self-sacrificial FeOOH nanoneedles protects Co-based active phases under high current. • Efficient Co 2+ →Co 3+ conversion enriches high-valence active sites for accelerated OER kinetics. • The catalyst delivers an low overpotential of 275 mV at 200 mA cm −2 . • The catalyst achieves remarkable operational stability for over 450 h at 1 A cm −2 for OER. Cobalt hydroxide-based catalysts are promising candidates for electrochemical water splitting, yet their practical application in industrial electrolysis is hindered by insufficient activity under high-current conditions. Herein, we rationally construct a hierarchical Co(OH) 2 /FeOOH composite via a one-step heterogeneous nucleation strategy, where FeOOH nanoneedles are uniformly anchored on Co(OH) 2 nanosheets frameworks. The composite achieves an ultra-low overpotential of 275 mV at 200 mA cm −2 for oxygen evolution reaction (OER), with a lower Tafel slope. More notably, it maintains stability with negligible potential fluctuation over 450 h under an industrially relevant current density of 1 A cm −2 . The FeOOH promotes efficient Co 2+ →Co 3+ valence transition, while the hierarchical interfacial interactions enhance charge transfer efficiency and stabilize high-valence Co active species. A unique self-sacrificial mechanism is unveiled that preferential tip dissolution of FeOOH nanoneedles effectively protects the underlying Co-based active sites from over-oxidation and structural collapse, thereby ensuring long-term catalytic stability. Mechanistic studies further suggest that Co(OH) 2 /FeOOH exhibits enhanced lattice-oxygen-participated character relative to CoFe-LDH, which tends to follow the adsorbate evolution mechanism. This work develops a self-sacrificial interface engineering strategy to boost the activity and stability of Co(OH) 2 , and provides a feasible structural design paradigm for developing durable OER electrocatalysts toward industrial-relevant high-current conditions. A unique self-sacrificial interface engineering strategy to boost the activity and stability of Co(OH) 2 for oxygen evolution reaction. Download: Download high-res image (157KB) Download: Download full-size image
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高影响因子
JOURNAL OF RARE EARTHS
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2026
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IF 9.6
Jiashuo Lv,Liming Xu,Fan Zhang,Danqin Li,Jie Li,Yufei Hu,Wenjing Zhou,Meisi Yu,Furui Lin,Jian Hou,Weiqiang Zhou
Nickel-based catalysts are attractive for methanol oxidation owing to their structural tunability and intrinsic activity for C–H bond activation. However, their limited ability to capture OH – at the reaction interface results in reduced energy-conversion efficiency. In this work, we demonstrate that La-Ni(OH) 2 /graphene oxide (GO) delivers a multilevel synergistic optimization that markedly enhances photoelectrochemical methanol oxidation. The random doping of La disturbs the periodicity of Ni–O lattice, which promotes surface reconstruction and the enrichment of OH – at the electrified interface. Notably, La doping-induced oxygen vacancies act as charge-trapping sites, promoting the separation of photogenerated electron-hole pairs. More photogenerated holes can reach the reaction interface and participate in oxidation, synergistically enhancing the photoelectrocatalytic efficiency. By optimizing the interfacial microenvironment, the La-Ni(OH) 2 /GO catalyst achieves a current density of 179.8 mA/cm 2 in alkaline medium and increases to 222.6 mA/cm 2 under illumination.
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高影响因子
危险品化学品经营许可证（带存储）