Chemphyschem最新文献_第8页

Biogenic Growth of Magnetic Retrievable Ca4Fe9O17 Anchored on Rice Husk Biochar for Methylene Blue Degradation through Persulfate Activation 磁性可回收Ca4Fe9O17在稻壳生物炭上的生物生长及过硫酸盐活化降解亚甲基蓝

IF 2.2 3区化学

Chemphyschem Pub Date : 2025-07-14 DOI: 10.1002/cphc.202400997

Gurkaran Singh, Gaurav Yadav, Bunty Sharma, Ramesh Kumar Sharma, Ajeet Kaushik, Ganga Ram Chaudhary

{"title":"Biogenic Growth of Magnetic Retrievable Ca4Fe9O17 Anchored on Rice Husk Biochar for Methylene Blue Degradation through Persulfate Activation","authors":"Gurkaran Singh, Gaurav Yadav, Bunty Sharma, Ramesh Kumar Sharma, Ajeet Kaushik, Ganga Ram Chaudhary","doi":"10.1002/cphc.202400997","DOIUrl":"10.1002/cphc.202400997","url":null,"abstract":"The presence of dyes in wastewater has gained significant attention due to rapid industrialization. Methylene blue (MB) is a widely used cationic dye in the textile industry, but it poses several issues due to its toxicity and persistence in the environment. Herein, the Ca4Fe9O17/biochar (CFO/BC) nanocomposite by the coprecipitation method for persulfate activation have been successfully fabricated. The as-synthesized catalyst shows effective removal of MB dye with 96.33% efficiency in just 40 min. The fabricated catalyst shows 54% total organic carbon removal of MB dye. The catalyst is characterized by Fourier-transform infrared spectroscopy, X-ray powder diffraction, X-ray photoelectron spectroscopy, Brunauer-Emmett-Teller analysis, scanning electron microscopy, and vibrating-sample magnetometer. The average crystalline size and crystallinity of the CFO/BC nanocomposite are found to be 31.74 nm and 49%, respectively. The mechanism of MB degradation by CFO/BC nanocomposite follows both the electron-transfer pathway and radical pathway, as shown by the scavenging test. The scavenger study shows the presence of reactive species such as sulfate radical (SO4•−), hydroxyl radical (•OH), and electrons for the degradation of MB dye. The liquid chromatography-mass spectrometry analysis is used to investigate the possible degradation pathway of MB dye. Moreover, the catalyst shows four-time reusability, highlighting its practical potential.","PeriodicalId":9819,"journal":{"name":"Chemphyschem","volume":"26 16","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144636315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sustained Synthesis of Ultra-Long Gold Wires via an Open Microfluidic System. 开放微流体系统持续合成超长金线。

IF 2.3 3区化学

Chemphyschem Pub Date : 2025-07-13 DOI: 10.1002/cphc.202500131

Chenhan Peng, Nahoko Kasai, Huan Luo, Hizuru Nakajima, Shungo Kato, Katsumi Uchiyama, Sifeng Mao

{"title":"Sustained Synthesis of Ultra-Long Gold Wires via an Open Microfluidic System.","authors":"Chenhan Peng, Nahoko Kasai, Huan Luo, Hizuru Nakajima, Shungo Kato, Katsumi Uchiyama, Sifeng Mao","doi":"10.1002/cphc.202500131","DOIUrl":"https://doi.org/10.1002/cphc.202500131","url":null,"abstract":"Ultra-long metal nano/microwires have broad applications in fields such as electronics, sensing, and catalysis. With the advantage of laminar flow, the microfluidic approach enables the efficient synthesis of metal micro- and even nanowires. However, the synthesized metal wires typically broaden over time due to diffusion as their length increases within microchannels, making it challenging to achieve long metal wires without widening. Herein, an open microfluidic system for the synthesis of ultra-long metal wires with size controllability is presented. The system creates a mixing area where two coflowing laminar streams interact, allowing reactions to occur in metal wire synthesis. Besides, the coflowing laminar streams are truncated through aspiration to restrict their diffusion over time, demonstrating the potential to synthesize ultra-long metal wires with size controllability. The conditions for gold nanowire synthesis are investigated, and gold nanowire with a width of 370 nm is synthesized. Two ultra-long gold wires, each exceeding 3600 μm in length, have also been successfully obtained. Finally, a gold wire has been directly assembled on patterned ITO chips for resistance monitoring.","PeriodicalId":9819,"journal":{"name":"Chemphyschem","volume":" ","pages":"e2500131"},"PeriodicalIF":2.3,"publicationDate":"2025-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144625405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Theoretical Prediction of Ethane Dehydrogenation Activated by Thermal Radiation and Inert N₂ Molecule. 热辐射和惰性N2分子活化乙烷脱氢的理论预测。

IF 2.3 3区化学

Chemphyschem Pub Date : 2025-07-13 DOI: 10.1002/cphc.202500205

Zichan Zheng, Xue Ding, Lu Wang, Zhixin Hu

引用次数: 0

A Highly Durable, Flexible and Asymmetric Supercapacitor with “All-Organic” Polymeric Electrodes Employing Al-Ion Electrochemistry 一种采用铝离子电化学的“全有机”聚合物电极的高耐用、柔性和非对称超级电容器。

IF 2.2 3区化学

Chemphyschem Pub Date : 2025-07-13 DOI: 10.1002/cphc.202500251

Indranil Dinda, Madhushri Maiti, Pappu Naskar, Anjan Banerjee

{"title":"A Highly Durable, Flexible and Asymmetric Supercapacitor with “All-Organic” Polymeric Electrodes Employing Al-Ion Electrochemistry","authors":"Indranil Dinda, Madhushri Maiti, Pappu Naskar, Anjan Banerjee","doi":"10.1002/cphc.202500251","DOIUrl":"10.1002/cphc.202500251","url":null,"abstract":"Conducting organic polymers are key components of flexible supercapacitors that power wearable devices and smart electronics. This work presents a flexible supercapacitor using Schiff base polymers (SBP) positive and poly-anthraquinone sulfides (PAQS) negative electrodes in aqueous Al2(SO4)3 electrolyte. The doping/dedoping of Al3+ ions in the polymeric structure enables pseudoFaradaic charge storage. SBP and PAQS show respective specific capacitances of 1375 and 1166 mF g−1 at 50 mA g−1, with >95% capacitance retention after 3000 cycles at 70 mA g−1. The 1.2 V flexible asymmetric pouch cell, utilizing low-cost stainless steel (SS304) current-collectors and electrolyte-soaked filter paper separators, exhibits a specific capacitance of 750 mF g−1 at 50 mA g−1 and retains 97% capacitance after 3000 cycles at 70 mA g−1. The supercapacitor demonstrates excellent power performance with a response time of 70 μs, achieving an energy density of 150 mWh kg−1 at 30 W kg−1 and a power density of 60 W kg−1 at 83 mWh kg−1. Its electrochemical performance remains stable across flat, bent, and rolled states, highlighting its flexibility and mechanical stability. Beyond performance, the scalability, low cost, and environmental impact of the polymeric electrodes make this technology promising for next-generation flexible energy storage.","PeriodicalId":9819,"journal":{"name":"Chemphyschem","volume":"26 15","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144625474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hollow Tubular Structure of NiCo₂S₄/NiFe-LDH can Function as a Bifunctional Catalyst for Aqueous and Flexible Zinc-Air Batteries. NiCo2S4/NiFe-LDH的空心管状结构可作为水溶液和柔性锌空气电池的双功能催化剂。

IF 2.3 3区化学

Chemphyschem Pub Date : 2025-07-11 DOI: 10.1002/cphc.202500027

Xinlong Luo, Guangming Li, Wenzhuo Zhang, Xujie Feng, Guangda Li

{"title":"Hollow Tubular Structure of NiCo2S4/NiFe-LDH can Function as a Bifunctional Catalyst for Aqueous and Flexible Zinc-Air Batteries.","authors":"Xinlong Luo, Guangming Li, Wenzhuo Zhang, Xujie Feng, Guangda Li","doi":"10.1002/cphc.202500027","DOIUrl":"https://doi.org/10.1002/cphc.202500027","url":null,"abstract":"This work initially prepares 1D hollow rod-like NiCo2S4 nanomaterials using the solvothermal method, and subsequently grew NiFe- layered double hydroxide (LDH) nanosheets on their surface, thereby obtaining NiCo2S4/NiFe-LDH composite materials. The uniform dispersion and growth of the sheet-like NiFe-LDH on the surface of the NiCo2S4 nanorods effectively maintained structural stability during the catalytic process, thus achieving efficient and stable catalytic performance. Additionally, the hollow NiCo2S4 nanorods maximize the exposure of active sites, thereby exhibiting excellent oxygen reduction reaction (ORR) performance. Meanwhile, the sheet-like NiFe-LDH grown on the surface of the NiCo2S4 nanorods demonstrates excellent oxygen evolution reaction (OER) activity. Furthermore, NiCo2S4/NiFe-LDH exhibits excellent bifunctional catalytic activity for both ORR and OER (ΔE = 0.75 V). The overpotential of the OER is 320mv and the half-wave potential of the ORR is 0.80 V. The catalyst was used as a cathode material for zinc-air batteries. When tested at a current density of 3 mA cm-2, the charge/discharge cycle can be stabilized for ≈450 h. When tested at a current density of 5 mA cm-2, the battery was able to maintain stable charge/discharge cycling for ≈350 h.","PeriodicalId":9819,"journal":{"name":"Chemphyschem","volume":" ","pages":"e2500027"},"PeriodicalIF":2.3,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144616539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on the Factors Affecting the H-Donating Abilities of α-CH Bonds in Cyclohexane Derivatives 环己烷衍生物中α-C - H键供H能力影响因素的研究

IF 2.2 3区化学

Chemphyschem Pub Date : 2025-07-11 DOI: 10.1002/cphc.202400928

Yan-Hua Fu, Fang Wang, Ling Zhao, Shanshan Liu, Guang-Bin Shen, Xiao-Qing Zhu

{"title":"Study on the Factors Affecting the H-Donating Abilities of α-CH Bonds in Cyclohexane Derivatives","authors":"Yan-Hua Fu, Fang Wang, Ling Zhao, Shanshan Liu, Guang-Bin Shen, Xiao-Qing Zhu","doi":"10.1002/cphc.202400928","DOIUrl":"10.1002/cphc.202400928","url":null,"abstract":"The stable chair conformation of cyclohexane and derivatives are often used to study the selectivity and activity in hydrogen atom transfer reactions (HATs) because of their special structures. In this article, the kinetic studies of 21 HATs between mono- and di-substituted cyclohexane derivatives with CumO• in CH3CN at 298 K were researched. The bond dissociation free energies ΔG°(XH), the intrinsic resistance energies ΔG≠XH/X and thermo-kinetic parameters ΔG≠°(XH) were obtained to evaluate the H-donating abilities of these substrates in thermodynamics, kinetics and HAT reactions. The factors that govern H-donating ability of the substrate were discussed in detail, including electronic effect (induction and conjugation effects), steric, polar, and stereoelectronic effects. Through this study, not only the ΔG°(XH), ΔG≠XH/X and ΔG≠°(XH) of mono- and di-substituted cyclohexane derivatives in HATs but also the influence of introducing groups tosubstrates on the reaction center and reactivity, can be quantitatively evaluated. This paper made the HAT reactivity of the axial and equatorial C(sp3)H bonds in the chair conformation of cycloalkanes concrete. The results of this study will enable researchers to better understand the various effects of substituents on cyclohexane ring, and lay a theoretical foundation for efficient design and synthesis of more H-donors.","PeriodicalId":9819,"journal":{"name":"Chemphyschem","volume":"26 16","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144616540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CO₂ Methanation Routes on Ni, Co, and NiCo (111) and (100) Surfaces. Ni， Co和NiCo（111）和（100）表面的CO2甲烷化路线

IF 2.3 3区化学

Chemphyschem Pub Date : 2025-07-09 DOI: 10.1002/cphc.202401056

Sebastian Godoy-Gutierrez, Prashant Deshlahra, Francisco Villagra-Soza, Alejandro Karelovic, Romel Jimenez

{"title":"CO2 Methanation Routes on Ni, Co, and NiCo (111) and (100) Surfaces.","authors":"Sebastian Godoy-Gutierrez, Prashant Deshlahra, Francisco Villagra-Soza, Alejandro Karelovic, Romel Jimenez","doi":"10.1002/cphc.202401056","DOIUrl":"https://doi.org/10.1002/cphc.202401056","url":null,"abstract":"Methanation of CO2 can decrease its emission and produce energy carriers. This study probes catalytic routes for CO2 activation and CO-H2 reactions on (111) and (100) facets of Ni, Co, and NiCo, using density functional theory. C and O binding strengths capture stability trends for surface species and demonstrate a strong structure sensitivity on NiCo surfaces. Direct *CO2 dissociation to *CO and *O is facile on all surfaces and exhibits the highest barriers on Ni(111). CH4 formation is limited by *CO activation and *CHx hydrogenation steps. On (111) surfaces, the preferred pathway is limited by *HCO formation steps, with barriers trending Co < NiCo < Ni. On (100) surfaces, the direct *CO dissociation is slightly favored over the *COH route for NiCo and Co, while the *COH formation is favored for Ni. The highest free energy barriers are for *CHx hydrogenations on Ni(100) and Co(100), but for *CO activation on NiCo(100). The (100) barriers are lower than (111) but NiCo(100) exhibits higher barriers than both Ni(100) and Co(100), a consistent trend with experimental reaction rates. These results suggest that the (100) facets can contribute significantly to measured rates, but higher surface converages and contributions from other facets should also be considered.","PeriodicalId":9819,"journal":{"name":"Chemphyschem","volume":" ","pages":"e2401056"},"PeriodicalIF":2.3,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144599519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pushing the Boundaries of Pnictogen-Bonding Organocatalysis: A Clash of Sb(III) versus Bi(III) 推动烟原键合有机催化的边界：Sb（III）与Bi（III）的冲突。

IF 2.2 3区化学

Chemphyschem Pub Date : 2025-07-09 DOI: 10.1002/cphc.202500265

Jyoti Sharma, Soumya Ranjan Dash, Kumar Vanka

引用次数: 0

Exploring the Photophysical Processes of an Al³⁺ Sensor Based on Schiff Base. 席夫碱Al3+传感器的光物理过程研究。

IF 2.3 3区化学

Chemphyschem Pub Date : 2025-07-04 DOI: 10.1002/cphc.202500196

Bingqing Sun, Haoyang Song, Yi Nan, Lei Liu, Juyoung Yoon

{"title":"Exploring the Photophysical Processes of an Al3+ Sensor Based on Schiff Base.","authors":"Bingqing Sun, Haoyang Song, Yi Nan, Lei Liu, Juyoung Yoon","doi":"10.1002/cphc.202500196","DOIUrl":"https://doi.org/10.1002/cphc.202500196","url":null,"abstract":"Schiff bases are commonly used as building blocks in the development of turn-on sensors for Al3+ detection. The isomerization of the CN bond in Schiff bases is generally believed to induce fluorescence quenching. Inhibiting this isomerization process through interactions with the target ion, Al3+, enhances fluorescence, enabling its detection. This mechanism is widely used to explain turn-on signals in similar sensors. However, the photophysical processes of such sensors may be more complex, necessitating a deeper understanding of their underlying sensing mechanisms. This study presents a comprehensive investigation into the photophysical processes and sensing mechanism of a turn-on sensor for Al3+ featuring a Schiff base moiety. Multiple excited-state intramolecular proton transfer (ESIPT) processes are observed, all closely associated with the Schiff base structure. These ESIPT processes trigger CN isomerization, leading to the formation of two nonemissive twisted intramolecular charge transfer (TICT) states. In addition to CN isomerization, two bond rotation processes with lower energy barriers are identified. These rotational processes generate two additional nonemissive TICT states and play a dominant role in the weak fluorescence of the sensor. This elucidation of photophysical processes provides a clearer understanding of the Al3+ sensing mechanism.","PeriodicalId":9819,"journal":{"name":"Chemphyschem","volume":" ","pages":"e2500196"},"PeriodicalIF":2.3,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144564629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the Reaction Mechanisms and Kinetics of NH2 Radical with Singlet and Triplet O2 Molecules: Implications for Modeling Ammonia Oxidation 探索NH2自由基与单线态和三重态O2分子的反应机理和动力学：模拟氨氧化的意义。

IF 2.2 3区化学

Chemphyschem Pub Date : 2025-07-03 DOI: 10.1002/cphc.202500070

Xiaoyang Lei, Tong Si, Bin Yang, Shuiqing Li

{"title":"Exploring the Reaction Mechanisms and Kinetics of NH2 Radical with Singlet and Triplet O2 Molecules: Implications for Modeling Ammonia Oxidation","authors":"Xiaoyang Lei, Tong Si, Bin Yang, Shuiqing Li","doi":"10.1002/cphc.202500070","DOIUrl":"10.1002/cphc.202500070","url":null,"abstract":"The detailed mechanism of how the electronically excited species of air plasma promote the combustion of ammonia remains unclear. Herein, the reactions of NH2 radical with both singlet and triplet oxygen molecules are investigated by high-level theoretical calculations. A minimal-energy crossing point is found on the 2A″ and 2A′ potential energy surfaces of H2NOO radical, which plays an important role on the product distributions of NH2 + O2(a1Δg) reaction. The temperature- and pressure-dependent rate constants of the reactions are predicted by Rice–Ramsperger–Kassel–Marcus theory and master equation simulations. Subsequently, the influence of O2(a1Δg) on the ignition delay time of ammonia is assessed by updating the existing ammonia combustion model with the computed reaction parameters. The results indicate that 5% O2(a1Δg) in the total oxygen dramatically accelerate the ignition of ammonia by more than one order of magnitude at ≈1000 K and 1 atm, mainly via the NH2 + O2(a1Δg) = H2NO + 3O reaction. Further, the catalytic effects of ammonia, water, and formic acid on the isomerization of the adduct, H2NOO radical, of NH2 + O2 are studied, which will have implications for modeling the oxidation kinetics of ammonia in both atmospheric and combustion conditions.","PeriodicalId":9819,"journal":{"name":"Chemphyschem","volume":"26 16","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144559339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0