MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Shukai Zhang,Linghui Cao,Aijuan Xie,Shiping Luo
4-Nitrophenol (4-NP), a hazardous chemical compound, presents significant risks to ecological balance, public well-being, and the integrity of the food supply chain. Consequently, the development of detection techniques characterized by both efficiency and precision is of utmost importance. In the present work, ZnCo(OH)F/multi-walled carbon nanotubes (MWCNTs) composite was synthesized through a hydrothermal approach, followed by a high-temperature annealing process to transform them into ZnCo 2 O 4 /MWCNTs tailored for electrochemical sensing of 4-NP. The integration of MWCNTs during the fabrication process induced a pronounced synergistic interaction between ZnCo 2 O 4 and MWCNTs, leading to a substantial enhancement in the electrochemical performance of the composite. The ZnCo 2 O 4 /MWCNTs-based sensors exhibit notable benefits, including an expanded electrochemically active surface area, superior electrical conductivity, and exceptional selectivity. Under optimized experimental parameters (S/N = 3), the sensor exhibited a broad linear detection range (0.5–600 μM), coupled with a lower limit of detection of 0.026 μM. When used on real samples, the sensor showed recovery rates of 98.79 %–100.47 %, indicating its feasibility for practical use in environmental monitoring and food safety evaluation.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Runfang Yang,Kai Zhang,Wei Yan,Chunyang Li,Yiwen Long,Maosheng Wu,Xiaolin Cheng,Hongwei Han,Xingguang Zhang,Mingxing Zhang,Guozhong Wu
Ni 3 (NO 3 ) 2 (OH) 4 positive electrode material was for the first time synthesized by gamma ray radiation under ambient conditions, and systematically investigated the synthesis mechanisms and electrochemical performance. The electrochemical performance of Ni 3 (NO 3 ) 2 (OH) 4 electrode can be regulated by controlling the absorbed dose. Ni 3 (NO 3 ) 2 (OH) 4 -200 kGy displays a remarkable electrochemical performance for supercapacitor, including a high specific capacity (1,086.7 C g –1 at 1 A g –1 ), good rate capability (50.6% at 15 A g –1 ), fast Faraday reaction kinetics, and excellent electrochemical cycle stability (90.8% retention at 5 A g –1 , after 5,000 cycles). Furthermore, the assembled Ni 3 (NO 3 ) 2 (OH) 4 -200 kGy//AC hybrid device exhibits a notable energy density of 99.8 Wh kg –1 at a power density of 849 W kg –1 (1 A g –1 ), and excellent electrochemical cycle stability, retaining ~92.5% of its initial capacitance after 5,000 cycles at 1 A g –1 . This work provides a new reaction pathway for the synthesis of inorganic materials and expands the potential application of radiation technology for electrode materials.
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INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Yi Wu,Anqi He,Da Li,Limin Yang,Yizhuang Xu,Yukihiro Ozaki,Isao Noda
This study investigates single-crystal structures of Lu3+/erythritol and nine rare earth–glycerol complexes, revealing deprotonation of normally inert OH groups via μ2-bridging (so-called DIOμ2 phenomenon). The pH drops upon alditol addition correlate with the deprotonation extent, showing increased deprotonation with decreasing lanthanide ionic radius (lanthanide contraction) and exceptionally high deprotonation for Sc3+. In all the rare earth/alditol complexes with the DIOμ2 phenomenon, two μ2-bridges merge into an M2O2 cluster (M is a rare earth ion) that is not very stable due to the Coulombic repulsion between two M3+ and between two O–. To stabilize the M2O2 cluster, the formation of more auxiliary five- and six-membered chelating rings between rare earth ions and alditol ligands is needed. Increment of the number of auxiliary five- and six-membered chelating rings favors the DIOμ2 reaction. This is the reason why the DIOμ2 reaction shows a progressively enhanced tendency when the alditol ligands change from myo-inositol to glycerol to erythritol and galactitol. The reaction is endothermic, as an increased temperature enhances deprotonation. The above results may be useful in the rational design of catalysts that efficiently activate inert OH bonds and facilitate related chemical processes.
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DALTON TRANSACTIONS
·
2025
·
IF 3.3
Wei Jia,Qi He,Zhiqiang Guo,Xiang Wu
The development of electrode materials has become a top priority as the requirement of global energy. Two-dimensional Ni(OH) 2 nanomaterials hinder its application in supercapacitors due to its low conductivity and limited active sites.Herein, we synthesize Ni(OH) 2 @NiS composites by a two-step hydrothermal route. It increases the specific surface area of samples and improves the ion transport rate. The Ni(OH) 2 @NiS-2 product delivers a specific capacitance of 1778 F g -1 at 1 A g -1 and cycle stability (88% at 2 A g -1 after 10,000 times cycling). Furthermore, the asymmetric supercapacitor (ASC) achieves an energy density of 110.25 Wh kg -1 at 2700 W kg -1 . Also, the devices show stable cycling capability at extreme temperatures.
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NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 46
·期 5
·2189-2197
·
IF 3.591
Yangyang Xin,Dechao Wang,Dongdong Yao,Hailong Ning,Xiaoqian Li,Xiaoqian Ju,Yichi Zhang,Zhiyuan Yang,Yahong Xu,Yaping Zheng
Porous liquids (PLs), a new class of materials with permanent pores and macroscopic flowing behaviors, have attracted much attention for CO2 capture. However, the preparation of PLs is always complicated, which is not suitable for the scale-up. Herein, we propose a rather simple and feasible strategy based on post-synthetic modification of pore generators and the like-dissolves-like principle to synthesize UiO-66-PLs with low-viscosity. To be specific, the metal–organic framework (MOF) UiO-66 with hydroxyl groups (denoted UiO-66-OH) was modified by an organosilane (denoted KH550 or SID) via a post-synthetic modification method, obtaining the pore generator UiO-66-OS (denoted UiO-66-KH550 or UiO-66-SID). Then, the UiO-66-OS was dispersed into two different sterically hindered polydimethylsiloxane solvents (PDMS400 or PDMS6000). Thereby, a series of type 3 PLs (UiO-66-PLs) with superior fluidity at room temperature and accessible porosity were obtained. For instance, the viscosities of UiO-66-KH550-PDMS400 and UiO-66-SID-PDMS400 were 1.1 and 1.5 Pa S at 25 °C, respectively, which were far lower than those of values reported thus far. In addition, gas sorption–desorption measurements indicated that the UiO-66-PLs exhibit superior CO2 sorption performance and great potential for CO2/N2 separation. Moreover, molecular simulation was carried out to verify the retained accessible porosity. Notably, the strategy of constructing type 3 PLs based on the post-synthetic modification of MOFs with organosilane and the like-dissolves-like principle not only provides a new solution for the development of low-viscosity PLs, but also opens a new path for the construction of other types of advanced porous material (APM)-based (e.g., covalent organic frameworks (COFs), porous organic cages (POCs)) PLs, which have potential applications in the fields of gas trapping storage, and catalysis.
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CRYSTENGCOMM
·
2012
·Vol. 14
·期 10
·3380-3386
·
IF 3.842
Lixian Han,Jie Liu,Zhengjun Wang,Kun Zhang,Hui Luo,Bo Xu,Xing Zou,Xiao Zheng,Bin Ye,Xibin Yu
Monodisperse ZnSn(OH)6 (ZHS) microcrystallites (MCs) with two morphologies have been prepared through a facile preparation method without complicated steps, or advanced experimental conditions or equipments. The morphology and compositional characteristics of the 3D hierarchitectures (HAs) of ZHS MCs were investigated by various techniques such as XRD, FESEM, TEM, UV-vis spectra, BET, XPS and EPR. In the reaction system the morphology evolution from cube to sphere was controlled by adding a different concentration of NH4OH. Meanwhile, the formation mechanisms of the two ZHS MCs were studied via a series of time-dependent experiments. Interesting, ZHS MCs were self-assembled from irregular-shaped nanoparticles (5–10 nm). The XPS and EPR tests demonstrated oxygen vacancy defects existed in the ZHS MCs. The gas sensors based on ZHS presented a good sensor performance towards HCHO. However, the gas sensors based on of ZHS spherical MCs exhibited a higher response, shorter recovery time and good reproducibility towards HCHO than those of ZHS cubic MCs. More importantly, the best gas sensing properties were found coming from the ∼600 nm spherical ZHS MCs owing to more oxygen vacancy defects, lower band gap energy, and larger active surface area.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
·
IF 7.8
Pan Zhang,Zhongfa Zha,Jiawen Yang,Xinbo Wang,Jianwen Song,Shuming Du,Liwen Li,Kun Zhao,Dong Fu,Lemeng Wang,Jun Ke,Pengfei Qu
High energy consumption during CO₂ desorption remains a critical bottleneck limiting the industrial application of monoethanolamine (MEA)-based carbon capture technologies. To address this issue, a novel high-efficiency catalyst, the 1:4-Ti@D composite catalyst based on diatomite and TiO(OH) 2 surface modification, was developed. Catalytic performance was evaluated in 30 wt% MEA solution at 90 °C. Compared with non-catalytic processes, the 1:4-Ti@D catalyst enhanced total CO₂ desorption amount by 46.2 % and maximum desorption rate by 125.1 %, while reducing desorption energy consumption by 39.2 %. Notably, it maintained stable catalytic efficiency after 10 consecutive adsorption-desorption cycles, confirming its durability for industrial use. The physicochemical characteristics of the catalysts were comprehensively elucidated through various multi-dimensional characterization techniques. The experimental findings revealed that the synergistic effect of TiO(OH) 2 and diatomite substantially augmented the surface acid site density, while the optimized mesoporous structure facilitated efficient reactant transport, thereby underpinning the catalyst's exceptional performance. By the study of desorption mechanism, the stronger interaction between Ti and O of reactants can lead easier H 2 O and RNHCOO - absorption and activation. Moreover, an assessment of the catalyst's impact on thermal and oxidation degradation as well as the corrosion rate of MEA indicated minimal influence on amine degradation and corrosion processes. This work provides a new strategy for developing low-cost, high-stability clay-based catalysts and offers technical support for advancing energy-efficient industrial carbon capture systems.
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Sustainable Materials and Technologies
·
2025
·
IF 9.2
Haize Jin,Xiaoxia Huang,Wen Yijun,Mengyao Zhu,Cuixia Li,Qikun Wang
Photothermal synergistic catalysis provides an efficient implementation strategy for CO₂ conversion into renewable energy. Here, we synthesized a geopolymer/g-C₃N₄/Ni(OH)₂ (GCN) photothermal catalyst featuring nanoscale-interval exposed adsorption and photothermal catalytic active sites through concurrent geopolymerization and alkaline precipitation reactions. The rational modulation of Ni(NO₃)₂ proportion induced explosive nucleation of Ni(OH)₂, ultimately resulting in a nanostructure where geopolymer nanoclusters and Ni(OH)₂ nanocrystals were intergrowth on the g-C₃N₄ interface. The construction of this ternary system effectively enhanced the photogenerated electrons transfer efficiency, and synergized with the thermal effect to significantly improve CO₂ reduction efficiency. And the GCN demonstrated exceptional capture capabilities for both CO₂ and H₂. Under light irradiation, GCN exhibited non-thermal photochemical effect characteristics. Through the photo-assisted thermal catalysis synergistic action, the CO₂ conversion product rate reached 1057.89 mmol.g cat −1 .h −1 , which was 17,869.84 times and 1.16 times higher than those under pure photocatalysis and pure thermal catalysis, respectively. The corresponding CO selectivity can reach 96.05 %. And GCN exhibited stable photothermal cycling performance, the production rate in the 10th cycle still reached 970.28 mmol·g cat −1 ·h −1 . Moreover, the formation of chemical bonds at the geopolymer/Ni(OH)₂ interface effectively suppressed the excessive reduction of Ni(OH)₂ to metallic Ni 0 , thereby inhibiting deep hydrogenation of CO and ensuring high CO selectivity. This study provides both theoretical and technical foundations for the development of low-cost and high-efficiency CO₂ photothermal reduction catalysts.
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INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2021
·Vol. 45
·期 10
·14985-14994
·
IF 5.164
Siqi Qiu,Renbo Guo,Qingyu Wang,Feng Yang,Yibo Han,Xiaoniu Peng,Hui Yuan,Xina Wang
Summary P-type Ni(OH) 2 has been combined with n-type CdS nanorods and nanocrystals for enhanced photocatalytic property due to the p-n junction. Though CdS nanosheets exhibit fast charge transfer and large superficial area, the decoration of Ni(OH) 2 was rarely reported up to now. In this work, the photo-deposition of Ni(OH) 2 nanoparticles on CdS ultrathin nanoflakes was established for efficient photocatalytic H 2 generation. By changing the irradiation time of CdS, the reaction between Ni 2+ and OH − can be controlled for different loading density of Ni(OH) 2 . As the loading density-dependent morphology, light absorption, carrier separation and transfer were systematically studied for the composites, an obvious band gap narrowing from 2.28 to 2.08 eV was revealed, and the carrier separation and transfer between the CdS nanoflakes and Ni(OH) 2 nanoparticles have been enhanced for the composites with deposition time of 3 minutes. These together with the alignment of type “II” bands and the high specific surface area of the flakes and nanoparticles, lead to an optimum H 2 generation of 20.14 mmol/g/h, nearly three times of pure CdS (7.97 mmol/g/h). Such a study not only provides a deposition method of Ni(OH) 2 , but also sheds light on the enhancement strategy for photocatalytic property by controlling the microstructure and aligning the hetero-structured bands.
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
·
IF 14.7
Lv Jiabao,Cao Ang,Zhong Yunhao,Lin Qingyang,Li Xiaodong,Wu Hao Bin,Yan Jianhua,Wu Angjian
Renewable-driven electrocatalytic nitrate conversion offers a promising alternative to alleviate nitrate pollution and simultaneously harvest green ammonia. However, due to the complex proton-electron transfer processes, the reaction mechanism remains elusive, thereby limiting energy efficiency. Here, we adopt Ni(OH)₂ as a model catalyst to investigate the dynamic evolution of the reaction interface. A proposed OH cycle mechanism involves the formation of a locally OH-enriched microenvironment to promote the hydrogenation process, which is identified through in-situ spectroscopy and isotopic labelling. By further activating the dynamic state through the implementation of surface vacancies via plasma, we achieve a high Faradaic efficiency of almost 100%. The activated interface accelerates the OH cycle by enhancing dehydroxylation, water dissociation, and OH adsorption, thereby promoting nitrate electroreduction and inhibiting hydrogen evolution. We anticipate that rational activation of the dynamic interfacial state can facilitate electrocatalytic interface activity and improve reaction efficiency.
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INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 10
·14534-14545
·
IF 4.672
Yicen Liu,Bing Zhu,Yan-gai Liu,Hang Zhao,Zekun Wang,Liming Wu,Xi Zhang,Jian Chen
Summary In this study, we synthesized a bimetal hydroxyl fluoride, Co 0.6 Zn 0.4 (OH)F, with an overlapping nanoneedle structure using a simple hydrothermal method. The synthesized Co 0.6 Zn 0.4 (OH)F was used as a new electrode material to study its electrochemical performance. Because of the synergy between Co and Zn and the high ionicity of fluorides, the Co 0.6 Zn 0.4 (OH)F electrode exhibited a discharge capacity of 1355.5 mAh g −1 during the first charging and discharging cycle. After 400 cycles at a current density of 2 A g −1 , the Co 0.6 Zn 0.4 (OH)F electrode showed an excellent specific capacity of 756 mAh g −1 . The Co 0.6 Zn 0.4 (OH)F electrode also exhibited an excellent capacitance contribution rate, indicating good rate performance. In addition, the hydroxyl and oxygen vacancies in the electrode material promoted the lithium/dilithium reactions. Therefore, Co 0.6 Zn 0.4 (OH)F is an excellent lithium storage material with high rate; thus, it has a certain potential application value in the future.
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BIOMACROMOLECULES
·
2011
·
IF 5.327
Lixin Yang,Jizheng Wei,Lesan Yan,Yubin Huang,Xiabin Jing
A series of biodegradable polyurethanes containing free side hydroxyl groups (PUOH) were synthesized successfully in two steps: (1) PLA diol as soft segment, hexamethylene diisocyanate (HDI) as hard segment, and benzalpentaerythritol (BPO) as a chain extender were used to synthesize PUs with protected OH groups; (2) CF3COOH was used as a deprotection agent to remove the benzal groups on PU to prepare PUOH. The properties of PU and PUOH were characterized by Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance (NMR), differential scanning calorimetry (DSC), water contact angle measurement, and gel permeation chromatography (GPC). The benzal groups were removed completely in 15 min without detrimental effect on PU main chains to obtain PUOHs. 4-Azidobenzoic acid was conjugated to PUOH through its esterification with the free OH groups on PUOH. The results of immunofluorescence assay showed that the phenyl azide groups formed were capable of binding mouse IgG under UV (254 nm) irradiation in 3 min; the bound mouse IgG retained its own biological activity and could further bind the FITC-labeled anti(mouse IgG). Therefore, this material has a potential in immunofluorescence assay and related fields.
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