JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Peirong Chen,Chengguang Lang,Jianshan Ye,Wenfeng Zhan,Guangquan Wu,Liang Chen,Jianzheng Li,Lin Xu,Mingxi Liang,Kunpeng Xu,Liuzhang Ouyang
Developing an efficient and scalable approach to fabricate catalysts with high activity and long-term stability remains a critical challenge in electrochemical hydrogen production. In this study, we present a straightforward method utilizing mechanochemical ball milling to synthesize nickel oxide and molybdenum carbide composites. The incorporation of nickel oxide into molybdenum carbide was observed to induce a synergistic effect, leading to improved electrochemical oxygen evolution reaction (OER) activity and long-term stability. Moreover, a two-electrode alkaline electrolyzer incorporating these materials demonstrated superior overall water-splitting efficiency. This approach presents a viable and scalable method for the large-scale synthesis of advanced water-splitting catalysts with commercial potential.
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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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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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BIOSENSORS & BIOELECTRONICS
·
2025
·
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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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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SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Yingdong Chen,Rongze Sun,Wentao Yan,Mengyao Wu,Yong Zhou,CongJie Gao
In many important industries, such as the textile printing industry, a large amount of dye/salt wastewater is often discharged, which can destroy the ecological environment of the water body. Membrane technology has a great potential in the treatment of environmental problems caused by dye/salt wastewater. Polyvinyl alcohol (PVA) nanofiltration (NF) membrane has a bright future in dye/salt wastewater treatment , however, works on this are rare. Herein, antibacterial PVA NF membrane incorporated with Cu(OH) 2 nanowires for the dye/salt wastewater treatment is reported. The membrane was prepared via coating the solutions containing PVA, glutaraldehyde and Cu(OH) 2 nanowires on the polyethersulfone ultrafiltration membrane. Cu(OH) 2 nanowires has a diameter of 60 nm and was successfully introduced into the membrane. The introduction of nanowires improved the membrane hydrophilicity and roughness, which is conducive to the improvement of membrane flux. Membrane separation performance for one component solution and dye/salt solution were investigated. The introduction of Cu(OH) 2 increases the flux of the membrane obviously (the highest increase is 178.78% (from 21.49 to 38.42 L·m −2 ·h −1 ·bar −1 , for NaCl solution as the feed). Besides, the membrane doped with nanowires also possessed a high dye/salt selectivity . For one component solution, the dye removal rate was over 97.00% while the salt rejection was low (the lowest was 13.18% (NaCl)). For the dye/salt solution, the dye (Congo Red) rejection kept at a high level (98.91%) and the salt (NaCl) rejection was still low (13.71%), while the flux was also high (37.56 L·m −2 ·h −1 ·bar −1 ). The performance is superior to that of many membranes reported in previous works. Moreover, the Cu(OH) 2 nanowires endowed the membrane with an improved and high antibacterial property. The sterilization rate of Escherichia coli and Staphylococcus aureus reached more than 99.99%.
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ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Cao Cui,Jingyun Wang,Zhenguo Luo,Jin Wang,Chunxia Li,Zhengquan Li
Cobalt hydroxide in α-form (α-Co(OH) 2 ) is an attractive electrocatalyst for oxygen evolution reaction (OER). Traditional preparation of α-Co(OH) 2 nanosheets often leads to a packing morphology after synthesis or post electrode fabrication, which severely limits the exposure of surface active sites. In this work, we report the synthesis of a self-supported 3D flower-like structure consisting of 2D α-Co(OH) 2 nanosheets through a metal-organic-framework (MOF)-mediated synthetic method. We found that the formation of MOF intermediates can produce dispersive α-Co(OH) 2 nanosheets with a stable 3D hierarchical structure which can effectively avoid the packing of individual nanosheets. The developed α-Co(OH) 2 nanosheets exhibit an obviously enhanced OER activity in comparison with the nanosheets prepared with traditional method. The prepared α-Co(OH) 2 nanosheets have been well characterized and their formation mechanism is proposed.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Hui Yang,Ziyu Wang,Cuixia Xu,Yuan Lin,Guoliang Liu
The first example of lanthanide borate-sulfate compound, namely, La 2 B 3 O 4 (OH) 3 (SO 4 ) 2 has been obtained through hydrothermal synthesis , which belongs to polar space group Pna 2(1) (No. 33). Its structure possesses double lanthanum sulfate layers in the ab plane in which the lanthanide ions are bridged by SO 4 tetrahedra. These layers are further cross-linked by borate chains into the final 3D framework. It is noteworthy that this compound is the first lanthanide borate-sulfate which crystalizes in polar space group and it displays second-harmonic generation (SHG) signal of about 0.1 times that of KH 2 PO 4 . The SHG coefficient of the compound is ascribed to the synergistic effect of SO 4 units and borate units. Meanwhile, distorted LaO x polyhedra also play an important role in the contribution to SHG response.
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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 Environmental Chemical Engineering
·
2025
·Vol. 13
·期 6
·120116
·
IF 7.2
Wujian Zhang,Yongchao Zhao,Jidong Wang,Kangjun Wang,Hangjia Shen,Zongjian Liu,Wenfeng Han,Ying Li,Aimin Chen,Haodong Tang
The dehydrofluorination of 1,1-difluoroethane (R152a) is a Lewis acid–catalyzed reaction in which both catalytic activity and stability are governed by the coordination and acidity of aluminum sites. In this work, a mechanochemical fluorination strategy was developed to construct a partially fluorinated Al-based catalyst with tunable acid properties. By controlling the fluorine-aluminum ratio during ball milling, the in situ formation of AlF 2 (OH) was achieved, serving as a structural stabilizer and electronic modulator. The coexistence of F-Al-O units and unsaturated Al centers provides medium-strength Lewis acid sites, which favor selective C-F bond activation while suppressing side reactions. Comprehensive characterizations (XRD, XPS, 27 Al NMR, and NH 3 -TPD) confirmed that the defect-related F-Al-O structure maintains structural integrity and balanced acidity during reaction. Consequently, the optimized catalyst exhibits excellent activity, selectivity, and long-term stability in R152a dehydrofluorination.
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JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2019
·Vol. 19
·期 12
·7840-7845
·
IF 1.093
Cheng Zi-Qiang,Yu Ping,Shi Hai-Quan,Liu Zhi-Min,Cheng Guang-Ling,Cheng Hong-Bo,Liang Shan
In this study, In(OH)3 nanocrystals with three morphologies including rods, cubes and spheres were synthesized through a hydrothermal method. The morphology and crystalline were manipulated by controlling the growth speed and the addition of ascorbic acid. The InVO4
nanocrystals were obtained by a process sacrificing In(OH)3 templates. The phase transformation of rods and cubes generated size-controllable products, whereas that of nanospheres formed hollow micro-spheres. InVO4 nanocrystals display a brilliant yellow emission band
with the peak at 517 nm. Intriguingly, luminescent rare-earth Eu ions with red emission could be doped into InVO4 nanocrystals during the phase transformation. Excitation and the emission spectra indicated an excitation energy transfer from the vanadate to the rare-earth ions.
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JOURNAL OF PHYSICAL CHEMISTRY A
·
2017
·
IF 2.847
Jianqiang Zhu,Shuyan Wang,Narcisse T. Tsona,Xiaotong Jiang,Yifeng Wang,Maofa Ge,Lin Du
Rate constants at room temperature (293 ± 2 K) and atmospheric pressure for the reaction of methyl n-propyl ether (MnPE), CH3OCH2CH2CH3, with OH and NO3 radicals and the Cl atom have been determined in a 100 L FEP-Teflon reaction chamber in conjunction with gas chromatography-flame ionization detector (GC-FID) as the detection technique. The obtained rate constants k (in units of cm3 molecule–1 s–1) are (9.91 ± 2.30) × 10–12, (1.67 ± 0.32) × 10–15, and (2.52 ± 0.14) × 10–10 for reactions with OH, NO3, and Cl, respectively. The products of these reactions were investigated by gas chromatography-mass spectrometry (GC-MS), and formation mechanisms are proposed for the observed reaction products. Atmospheric lifetimes of the studied ether, calculated from rate constants of the different reactions, reveal that the dominant loss process for MnPE is its reaction with OH, while in coastal areas and in the marine boundary layer, MnPE loss by Cl reaction is also important.
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