Journal of Experimental Nanoscience
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2012
·
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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ACS Nano
·
2024
·
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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Journal of Energy Storage
·
2023
·
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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INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
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IF 5.4
Xiaoyu Qiu,Linting Zou,Jianmei Cen,Xingnian Duan
In this research, Mo-oxides complexes combined with Co(OH) 2 grown on three-dimensional (3D) nickel foam (Mo-Co(OH) 2 /NF) were developed as a peroxymonosulfate (PMS) activator enabling a pathway transition from radical to non-radical for efficient degradation of organic pollutants. The incorporation of high-valence Mo species promoted the formation of sheet structure and facilitated the Co(II)/Co(III) ratio, while Co served as the primary active site for PMS activation. Consequently, complete removal of 40 mg/L Rhodamine B (RhB) in optimized conditions (catalyst = 1.5 cm 2 , 0.4 g/L PMS dosage, reaction temperature = 25 °C) was achieved within 2 min. In addition, excellent adaptability was exhibited over a wide pH (3.0–9.0) and versatility (99 %, 80.94 % and 91.54 % for MB, LFX, and TC, respectively) in Mo-Co(OH) 2 /NF + PMS system. Impressively, radical scavenging experiments and electron spin resonance (ESR) analyses revealed that the degradation process was mainly dominated by the conversion of O 2 •– to non-radical 1 O 2 . Hence, this work demonstrates the potential of high-valent metal-oxides complexes integrated with Co(OH) 2 as effective PMS activators for non-radical degradation of dye and other refractory antibiotics, significantly broadening their applications in environmental remediation.
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MOLECULES
·
2025
·Vol. 30
·期 16
·3319
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IF 4.6
Tong Chang,Renhui Deng,Jiaxin Xie,Jianyu Tang,Wenyao Gu,Zimin Peng,Suyao Liu
The abundant Si-OH groups serving as the defect sites in the ZSM-22 zeolite framework are not only closely associated with physicochemical properties and catalytic performance but are also the primary sites for attack by water molecules, thereby restricting applications involving or producing water. In the present study, a liquid-mediated healing process was used to convert the Si-OH groups in ZSM-22 zeolite into Si-O-Si bonds. The systematic investigation of the treatment solution’s composition and the hydrothermal conditions revealed that the crystallinity of ZSM-22 zeolite can be effectively enhanced following optimal healing treatment. Furthermore, the healed ZSM-22 zeolite exhibited enhanced ordering degree and pore connectivity without significant changes to the Si/Al and morphology. Moreover, the decline in Si-OH groups reduced the Lewis acid sites without altering the Brønsted acidity, which led to a slight decrease in the dispersion of Pt particles. In n-decane hydroisomerization, compared to the parent ZSM-22 zeolite catalyst, the healed catalyst demonstrates higher reactant conversion and increased isomer yield, attributing to its enhanced confinement within the micropore voids, which leads to a reduced yield of multi-branched isomers susceptible to cracking. This study presents a potential application of ZSM-22 zeolite in hydroisomerization for complex and challenging feedstocks.
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BIOSENSORS & BIOELECTRONICS
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2025
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IF 10.5
Xue Fan,Lujie Wang,Hongxin Wang,Liuyi Huang,Jiahui Lin,Xia Gao,Fengna Xi
An immunosensing platform was developed based on the enhanced electrochemiluminescence (ECL) of luminol-dissolved oxygen (O 2 ) by nanochannel-confined Ni(OH) 2 -CeO 2 composite nanozyme, which is able to sensitively detect cytokine. The mesoporous silica nanochannel array film (SNF), decorated on a cost-effective ITO electrode, features ultrasmall (2∼3 nm) nanochannels, enabling the confinement of in situ synthesized Ni(OH) 2 -CeO 2 composite nanozyme via a continuous electrodeposition process. Ni(OH) 2 -CeO 2 exhibits dual peroxidase (POD) and oxidase (OXD) enzyme-like activities, serving as an efficient oxygen reduction reaction (ORR) catalyst to produce reactive oxygen species (ROS) and catalyze luminol oxidation. Compared to nanozymes synthesized on flat electrodes, nanochannel-confined nanozyme demonstrates superior ECL enhancement. The combination of Ni(OH) 2 and CeO 2 exhibits strong synergistic catalytic performance, boosting ECL of luminol-O 2 under neutral conditions by 33.7 orders compared to electrode without confined nanozyme. Using tumor necrosis factor-alpha (TNF-α) as a proof-of-concept demonstration, immunosensor is fabricated by immobilization recognition antibodies on the SNF outer surface. TNF-α binding induces immunocomplex formation, reducing ECL signal by increasing interfacial resistance and hindering luminol diffuse. This enables sensitive TNF-α detection over a wide linear range (10 fg/mL to 10 ng/mL) with an ultralow detection limit of 8 fg/mL. The immunosensor demonstrates good selectivity, stability, and reproducibility.
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DALTON TRANSACTIONS
·
2024
·
IF 3.5
Jiayang Huang,Yao Su,Zhangjie Qian,Miaoer Wu,Yunchang Xie,Chao Zeng
The photocatalytic conversion of CO2 and H2O into useful chemicals or fuels over semiconductor photocatalysts is regarded as a promise technology to settle the problems of global warming and energy exhaustion. Whereas, the inefficient photo-absorption and slow charge dynamics limit the CO2 photoreduction efficiency. Here, a ternary heterojunction photocatalyst Cu2Cl(OH)3/In/In2O3 (Cu H IO) with intimate interface is obtained via hydrogen chemical reduction approach followed by hydrolysis reaction, where In species can be produced on the surface of In2O3 from the hydrogen chemical reaction with the calcining temperature over 500℃. The Cu H IO exhibits enhanced photocatalytic activity of CO2 conversion to the pristine In2O3, In2O3 with In species (H IO), and Cu2Cl(OH)3/In2O3 (Cu IO). On the absence of sacrificial agent or cocatalyst, the yield rate of CO and CH¬4 over Cu H IO are 4.36 and 1.09 μmol·g-1·h-1, which is 8.38-fold and 18-fold that of pristine In2O3 (0.52 and 0.06 μmol·g-1·h-1), respectively. The photocatalytic performance enhancement of Cu H IO results from the construction of the ternary heterojunction, which synchronous improve the photo-response and charge separation of In2O3. Moreover, the possible CO2 reduction pathway over Cu H IO has also been investigated and proposed. This work provides an important strategy for developing high-efficiency heterojunction photocatalyst system for solar fuel generation.
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JOURNAL OF POWER SOURCES
·
2025
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IF 7.9
Wenxing Jiang,Qiqi Wan,Endao Zhang,Yingying Liu,Junbo Hou,Min Yang,Xiaodong Zhuang,Changchun Ke
This study presents a novel direct methylhydrazine fuel cell (DMHFC) utilizing a hydrothermally synthesized Pd-Ni(OH) 2 composite catalyst supported on nickel foam (Pd-Ni(OH) 2 /NF) as the anode. The Pd-Ni(OH) 2 /NF features a three-dimensional hierarchical architecture with dispersed Pd nanoparticles (0.08 mg cm −2 ) chemically anchored via Pd-O-Ni bonds in the Ni(OH) 2 nanosheet matrix, as confirmed by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDS) analyses. The electrode demonstrates superior electrocatalytic activity for the methylhydrazine oxidation reaction (MHOR), attributed to enhanced active site accessibility, charge transfer efficiency, and optimized mass transport. Differential electrochemical mass spectrometry (DEMS) reveals complete oxidation of hydrazine fragments to N 2 with suppressed NH 3 byproduct formation relative to Pd/C. Systematic optimization of operating conditions yields a peak power density of 30.5 mW cm −2 (oxygen as the oxidant, 80 °C) and 110 mW cm −2 (hydrogen peroxide as the oxidant, 80 °C), with performance trade-offs observed between reaction kinetics and fuel crossover. This work validates the feasibility of DMHFC technology, highlighting the potential of methylhydrazine as a high-energy-density fuel for portable systems, while providing insights into electrode design and performance optimization for advanced energy conversion devices.
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INORGANICA CHIMICA ACTA
·
2024
·
IF 2.7
Zhen-Qiang Qin,Wen-Hao Li,Jia-Xin Zhang,Yi-Chuan Huang,Hong-Yan Li
Four cationic Ir(III) complexes Ir1–Ir4 , [(4-fpiq) 2 Ir(L 1 )]PF 6 ( Ir1 , 4-fpiq = 1-(4-fluorophenyl)isoquinoline, L 1 = 4,4′-dibromo-2,2′-bipyridine), [(4-fpiq) 2 Ir(L 2 )]PF 6 ( Ir2 , L 2 = 5,5′-dibromo-2,2′-bipyridine), [(4-chopiq) 2 Ir(L 1 )]PF 6 ( Ir3 , 4-chopiq = 1-(4-formylphenyl)isoquinoline), [(4-chopiq) 2 Ir(L 2 )]PF 6 ( Ir4 ) were synthesized using 2,2′-bipyridine derivatives as neutral ligands. These complexes show decent orange and red phosphorescence (λ em = 576–618 nm) with quantum efficiencies of 0.13–0.37. The influence of substituents in the ligands on the photophysical and electrochemical properties of the Ir(III) complexes was investigated by UV–vis absorption and emission spectra and cyclic voltammograms and simulated by density functional theory (DFT) calculations. Upon addition of OH − ions to the solutions of Ir1–Ir4 , all the complexes exhibited a turn-on response to OH − with a low detection limit on the order of 10 −6 M, and high selectivity to OH − was demonstrated.
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ACS Omega
·
2025
·
IF 4.3
Tao Shen,Guodong Wu,Li Yin,Tianen Chen,JiYe Fan,Yuanhao Wang,Shifeng Wang
Developing efficient adsorbents for removal of organic pollutants and heavy metals is essential for environmental protection. In this study, a series of GO/UiO-66-(OH)2 composites were synthesized and characterized using XRD, FT-IR, and SEM, confirming enhanced thermal stability, reduced aggregation, and maintained crystallinity of UiO-66-(OH)2 due to GO incorporation. Batch adsorption experiments showed that GO increased the adsorption capacity, with GO-8/UiO-66-(OH)2 achieving 324.2 mg/g for diclofenac sodium (DCF) and 429.3 mg/g for Hg2+. DCF adsorption was primarily governed by physisorption, while Hg adsorption was chemisorptive, involving strong coordination with oxygen functional groups. Kinetic and isotherm studies revealed the suitability of the pseudo-second-order and Freundlich models, with thermodynamic analysis showing exothermic DCF adsorption and endothermic Hg2+ adsorption. The composites also exhibited high selectivity and stable regeneration, making them promising candidates for practical environmental remediation.
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Catalysts
·
2025
·Vol. 15
·期 12
·1144
·
IF 4
Luan Liu,Hongru Liu,Baorui Jia,Xuanhui Qu,Mingli Qin
Electrolysis of seawater is considered a green route for hydrogen generation; however, its practical application is limited by strong electrode corrosion and slow OER kinetics in chloride-rich media. Herein, we report a crystal-facet engineering strategy to construct nickel hydroxide with a parallel array structure on nickel foil (denoted as Ni(OH)2/NFPA, where NFPA represents nickel foil with parallel array) via a facile two-step etching-hydrothermal method. Structural characterization confirms the formation of high-index Ni(220) surfaces and well-aligned hydroxide nanostripes, which promote more favorable bubble–electrode interactions and contribute to improved interfacial stability. Owing to its characteristic parallel array configuration, Ni(OH)2/NFPA exhibits outstanding OER performance in alkaline electrolyte, delivering a low overpotential of 256 mV at 10 mA·cm−2together with a Tafel slope as small as 74.9 mV·dec−1, surpassing commercial RuO2and disordered Ni(OH)2nanosheets. The optimized electrode also delivers remarkable durability, maintaining stable operation for 48 h at 100 mA·cm−2even under harsh alkaline seawater conditions at 80 °C. Bubble dynamics analysis reveals that the ordered array morphology produces a superaerophobic surface, enabling rapid detachment of oxygen bubbles and ensuring efficient mass transport. This study highlights facet-controlled construction of parallel nanoarrays as a promising approach to improve catalytic efficiency, corrosion resistance, and bubble management in seawater electrolysis, offering useful implications for the rational design of high-performance electrodes for practical hydrogen production.
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JOURNAL OF ETHNOPHARMACOLOGY
·
2020
·
IF 3.69
Li-Juan Deng,Yu-He Lei,Jing-Yu Quan,Bao-Jing Li,Dong-Mei Zhang,Hai-Yan Tian,Ye Chen,En-Xin Zhang,Lei Chen,Wen-Cai Ye,Wei-Min Ning,Lin-Zhong Yu,Jun-Shan Liu
Ethnopharmacological relevance Chansu, dried secretions from Bufonidae , has long been used for cancer treatment as a traditional Chinese medicine . In searching for effective anti-hepatoma agents from Chansu, our preliminary drug screening found that a bufadienolide , namely 1β-hydroxyl-arenobufagin (1β–OH–ABF), displays anti-hepatoma activities. However, the anti-hepatoma effects and molecular mechanisms of 1β–OH–ABF have not been defined. Aim of the study To evaluate the anti-hepatoma activity of 1β–OH–ABF against liver cancer Hep3B and HepG2 cells in vitro and in vivo , as well as explore the underlying mechanisms. Materials and methods The anti-proliferative effects of 1β–OH–ABF on liver cancer Hep3B, HepG2, HuH7, SK-HEP-1 and normal hepatocyte LO2 cells were examined by MTT assay and colony formation assay. Hoechst 33258 staining and Annexin V-FITC/PI staining assay were used to analyze apoptosis induced by 1β–OH–ABF. The collapse of the mitochondrial membrane potential (ΔΨm) was detected by JC-1 staining assay. Western blotting was used to examine the expression levels of targeted proteins. The role of mTOR in 1β–OH–ABF-induced apoptosis was investigated using small interfering RNA (siRNA) transfection. Zebrafish xenograft model was established to evaluate the anti-hepatoma effects of 1β–OH–ABF in vivo . Results We found that 1β–OH–ABF inhibits the proliferation of Hep3B, HepG2, HuH7, SK-HEP-1 cells but has little cytotoxicity towards LO2 cells. 1β–OH–ABF induces mitochondria dysfunction and triggers mitochondria apoptotic pathway, which is accompanied by the loss of ΔΨm, upregulation and translocation of Bax, as well as cleavages of caspase-9, caspase-3 and PARP. Mechanistically, 1β–OH–ABF markedly decreases the expression level of p-AKT/AKT and p-mTOR (Ser2248 and Ser2481)/mTOR in a time-dependent manner. Inhibition of mTOR by siRNA strengthens 1β–OH–ABF-mediated apoptosis. Critically, 1β–OH–ABF shows a marked in vivo anti-hepatoma effect on human Hep3B cell xenografts in zebrafish model. Conclusion 1β–OH–ABF induces mitochondrial apoptosis through the suppression of mTOR signaling in vitro and in vivo , indicating that 1β–OH–ABF may serve as a potential agent for the treatment of liver cancer.
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