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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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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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Bei Jiang,Mengya Xu,Ling Zhang,Wenjing Wang,Xin Qin,Shenyan Xu,Chunyu Che,Chuanqi Zhang,Wenzhong Wang
Open-shell organic radicals, characterized by their unique spin states, typically exhibit exceptional photothermal conversion efficiency. However, the development of open-shell organic radical materials with stability and high photothermal properties remains a challenge. Among these radicals, the stable and commercialized 4-OH-TEMPO radical molecule has garnered considerable attention in various organic synthesis reactions owing to its unique redox advantages, but it shows less application comparing with the other open-shell organic radicals in photo-thermal conversion. In this study, 4-OH-TEMPO exhibits favorable photothermal properties upon combination with Cu 2 + , thus it is capable of enhancing the reaction rate of HMF oxidation to DFF by a factor of 10 under LED (400 nm). Under illumination of LED, leading to the complete conversion of HMF and the generation of DFF with a yield of 99.7 % within 30 min. Mechanism study shows that the photothermal effect facilitates the kinetic process of the reaction, and accelerated conversion of 4-OH-TEMPO to the oxidatively active species 4-OH-TEMPO + under light-induced action further increased the reaction rate. This research proffers novel insights and references for 4-OH-TEMPO mediated organic synthesis reactions and the design of free-radical photothermal materials.
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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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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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ACS Applied Optical Materials
·
2025
·
IF 3.8
Feifei Qin,Yue Cao,Chengwei Wang,Guogang Zhang,Xiaoxuan Wang,Feng Chen,Gangyi Zhu,Yongjin Wang
Nowadays, most solid-state lighting-based visible light communication (VLC) technology suffers from the color converter’s short optical bandwidth or low stability. Herein, we fabricated MAPbBr3@PbBr(OH) nanocrystals (NCs) with high optical bandwidth and water-stable properties for color conversion of VLC and a white light-emitting diode (LED) system. The sample’s characteristic photoluminescence (PL) spectrum is green emission peaked near 529 nm. As a color converter, it has a high bandwidth capacity for devices. The sample indicates internal quantum efficiency (IQE) of about 38.33% and a PL decay time of about 5.5 ns, and it can maintain its PL properties in water for over 90 days The calculated optical bandwidth is about 49.4 MHz. Its measured −3 dB bandwidth with a 405 nm laser diode can reach 25 MHz with a data rate over 50 Mbps. More interestingly, the perovskite NCs can replace the green phosphor to build a high-speed and multicolor LED, and the −3 dB bandwidth can be maintained at over 80% in this case. These features are far beyond the abilities of commercial green phosphors. Finally, we demonstrate an underwater text transmission system with a 405 nm LED, perovskite color conversion layer, and low-cost silicon-based photodetector.
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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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JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2024
·Vol. 112
·期 1
·152-161
·
IF 2.3
Zhang Enlei,Chen Jiaojiao,Xu Rui,Song Xiaowen,Zhang Bengui,Wang Guosheng
Catalytic reduction of 4-nitrophenol (4-NP) into 4-aminophenol (4-AP) is an important method for treating toxic nitroaromatic pollutant. In this work, amorphous CoSn(OH) 6 nanocubes were synthesized by coprecipitation and calcination methods for 4-NP photocatalytic reduction. The crystal structure, morphology and optical property of the samples were characterized by XRD, SEM, TEM, XPS, and UV–vis DRS. The amorphous CoSn(OH) 6 nanocubes showed excellent photocatalytic performance in 4-NP reduction. The effects of catalyst dosage, 4-NP concentration, and sodium borohydride concentration on the conversion rate of 4-NP were investigated. The results showed that the conversion rate of 4-NP could reach 98.38% in 15 min at room temperature under visible light irradiation. After five cycles of experiments, the conversion rate of 4-NP remained above 90%, indicating the good catalytic stability of the amorphous CoSn(OH) 6 nanocubes. Finally, the mechanisms of photocatalytic reduction on amorphous CoSn(OH) 6 nanocubes are also discussed. The successful preparation of amorphous CoSn(OH) 6 nanocubes may enable the widespread use of amorphous polymetallic oxides for the removal of nitrophenols from wastewater in the future. Graphical Abstract Amorphous CoSn(OH) 6 nanocubes exhibit superior photocatalytic reduction 4-NP to 4-AP performance.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2025
·
IF 6.2
Xisong Feng,Mengjian Gao,Wanqing Wei,Wei Song,Jian Wen,Hongyu Wang,Guipeng Hu,Xiaomin Li,Cong Gao,Jing Wu
25-hydroxyvitamin D3 (25(OH)VD3) is an important daily nutritional supplement, and direct enzymatic C25 hydroxylation of vitamin D3 (VD3) to 25(OH)VD3 is a green and sustainable method. However, the low catalytic activity and electron transfer efficiency of redox partners of cytochrome P450 limited its production. Here, structure-guided semirational design of CYP109E1 led to the mutant CYP109E1M2, which showed a 2-fold increase in 25(OH)VD3 production compared to the wild-type. Furthermore, the novel reductase domain BmRD was first employed to construct a fusion protein with CYP109E1M2. Notably, truncating only two amino acids at the N-terminus of BmRD generated a fusion protein Chimera-2, resulting in a 38.5% increase in 25(OH)VD3 production. Under optimized conditions, the engineered strain Escherichia coli 03-2 produced 491.3 mg/L 25(OH)VD3 with a conversion of 49.0% and a space-time yield of 61.4 mg/(L·h). This work demonstrates the modification and optimization potential of P450 and lays a theoretical foundation for the industrialization of the 25(OH)VD3 biosynthesis.
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MATERIALS RESEARCH BULLETIN
·
2025
·
IF 5.7
Kang Wei,Jun Li,Xiao Sun,Meng Shao,Jianguo Tang,Soowohn Lee
rGO/Ni(OH) 2 /Ni 3 S 2 composite electrode materials were successfully synthesized on Ni foam (NF) by a two-step hydrothermal process and subsequent alkalization treatment. To investigate the influence of reaction time in the secondary hydrothermal process, three different hydrothermal times (4 h, 6 h, 8 h) were set. The results showed that the electrode had the highest specific capacitance of 2260 F·g −1 at 1 A·g −1 at the hydrothermal reaction time of 6 h, (4 h: 1807.8 F·g −1 , 8 h: 1358.3 F·g −1 ). In addition, it exhibited prominent rating capability and cycling stability, with 41.7% retention at 10 A·g −1 and 137.9% retention after 5000 cycles at 50 mV⋅s −1 . Finally, the assembled hybrid supercapacitor (HSC) with rGO/Ni(OH) 2 /Ni 3 S 2 /NF (6 h) and active carbon displayed outstanding electrochemical performance. When the power density was 400.5 W⋅kg −1 , it showed the energy density (25.2 Wh⋅kg −1 ), proving its potential as electrode materials for HSC devices.
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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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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Bei-Bei Zhang,Ping Liu,Hao-Ran Wang,Yan-Yang Li,Lin Zhang,Qing-Chao Liu,Zhong-Jun Li,Hong-Chang Yao
Developing efficient photocatalysts for solar-driven overall water vapor splitting is crucial for sustainable hydrogen production. However, current photocatalytic efficiencies are limited by inadequate hygroscopicity, sluggish proton transport, and rapid recombination of photogenerated electron-hole pairs. Here, we report the successful synthesis of an amorphous Ni(OH) 2 /Ni 2 B heterojunction material with a core–shell structure by regulating the reducing environment during the formation of nickel boride. This material exhibits highly efficient overall water vapor splitting performance without any cocatalysts. Under simulated solar irradiation, the optimized sample achieves a hydrogen production rate of 976 μmol·g −1 ·h −1 , with near-stoichiometric evolution of hydrogen and oxygen, an apparent quantum yield of 5.4 %, and a solar-to-hydrogen conversion efficiency of 3.8 %. The enhanced performance is attributed to the unique amorphous/amorphous heterojunction structure that promotes effective charge separation, the abundant surface hydroxyl groups that improve proton transport and hygroscopicity, and the formation of photo-induced frustrated Lewis pairs (FLPs). Our findings shed light on the critical role of amorphous structures and surface chemistry in boosting photocatalytic activity, paving the way for the rational design of advanced photocatalysts for overall water vapor splitting.
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