TETRAHEDRON
·
2017
·
IF 2.651
Shi-Yuan Liu,Lin-Yan Xu,Chun-Yu Liu,Zhi-Gang Ren,David James Young,Jian-Ping Lang
An efficient catalytic system containing [RuCl 2 (η 6 -p-cymene)] 2 and one P,N ligand, N-diphenylphosphino-2-aminopyridine ( L1 ) was loaded in catalyzing the alkylation of ketones with primary alcohols for a diverse array of substrates. Other five P,N ligands based on pyridin-2-amine and pyrimidin-2-amine were also examined in this reaction to explore the influence of steric hindrance and electronic effects. Monitoring by 1 H NMR and ESI-MS reveals a stable cationic L1 -coordinated ruthenium hydride intermediate, identified as [Ru(η 6 -p-cymene)(κ 2 - L1 )H] + . Organic intermediates consistent with a three-step dehydrogenation , alkylation and hydrogenation pathway were also observed. The final step in this reaction, the ruthenium-catalysed transfer hydrogenation reduction of α,β-unsaturated ketone with benzyl alcohol was performed separately.
✓ 已验证
DOI
高影响因子
Small Structures
·
2024
·Vol. 5
·期 3
·2300418
·
IF 13.9
Bingkun Wang,Zheng Li,Huijuan Wu,Shan Zhang,Guanglin Zhang,Jinqiu Zhang,Shanshui Lian,Li Zheng,Zhongying Xue,Siwei Yang,Guqiao Ding,Wenwu Xu,Shiwei Tang,Gang Wang
Surface-enhanced Raman scattering (SERS) is a versatile spectroscopic technique, which plays a crucial role in enhancing analytical sensitivity, investigating interfacial reaction mechanisms, enabling biosensing, and fostering efficient catalysis. Currently, the common SERS substrates are primarily metal nanostructures, which entail high manufacturing costs, complex processes, and the metal surface undergo change over time and with environmental conditions. These issues limit the development of SERS technology. In this work, a nitrogen-doped graphene (N-graphene) hydrangea was synthesized on a silicon (Si) substrate using plasma-assisted chemical vapor deposition (PACVD), forming an N-graphene hydrangea/Si hybrid structure as a SERS substrate. This substrate offers the advantages of high stability, ultra-sensitivity, and reusability. The three-dimensional nano-cavity structure of graphene can increase the interaction between light and graphene, resulting in an increased localized electric field. Combining theoretical simulation analysis, the introduction of nitrogen (N) elements adjusts the Fermi level of graphene, promoting efficient charge transfer. In practical scenarios, Di(2-ethylhexyl) phthalate (DEHP), a commonly used plasticizer, has raised concerns due to its potential as an endocrine disruptor and carcinogen. The as-prepared SERS substrate achieves a remarkable detection limit of as low as 10 −8 m for DEHP, providing significant support for environmental conservation and human health.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Wei Xia,Congling Li,Li Zhang,Xuemin Yu,Li Zheng,Rui Liu,Aifeng Lv
The development of highly efficient electrocatalysts is of utmost importance for advancing electrochemical energy conversion technologies. Transition metal sulfide heterostructure electrocatalysts have been widely studied and applied in electrocatalysis due to their highly inherent activity in the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) at the interface. We prepared NiS 2 /CoS 2 nanoparticle heterostructures doped with nitrogen-carbon nanotubes (CoS 2 /NiS 2 @N-CNTs) to induce the formation of bifunctional reaction sites. This design contributes to the excellent catalytic activity for electrocatalytic water splitting. The CoS 2 /NiS 2 @N-CNTs electrocatalyst exhibits prominent catalytic activities toward HER and OER, which required low overpotentials of 126 and 205 mV to yield the current density of 10 mA cm −2 in 1 M KOH. The prepared electrocatalysts exhibit fast reaction kinetics with tafel slopes of 71 and 82 mV dec −1 in HER and OER, respectively. The catalyst has a larger electrochemically active surface area (ECSA) of 1030 cm −2 and a strong electron transfer capability with an electrochemical impedance of 41 Ω. These properties are mainly attributed to the unique heterogeneous structure of the catalyst. In addition, CoS 2 /NiS 2 @N-CNTs catalyst is used as both the cathode and anode to fabricate a two-electrode system in a 1.0 M KOH solution measured at 1.53 V. Meanwhile, the stability measurement maintains for 23 h at a current density of 10 mA cm −2 with negligible degradation. This work has successfully developed an approach for rational design and novel synthesis of metal sulfide hybrids as bifunctional electrocatalysts with high activity and stability for overall water splitting.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Ying Han,Xiaoping Zheng,Beibei Jiang,Yuling Tang,Hongyuan Liu,Kemin Zhang,Yaping Guo,Jun Li
The influencing factors, products and mechanism of N -nitrosodimethylamine (NDMA) reduction by zinc (Zn) in the presence of transition-metal ions (Mn 2+ , Co 2+ and Ni 2+ ), were investigated. The NDMA removal by Zn was significantly improved by them, and the promoting effect of Co 2+ and Ni 2+ were better than Mn 2+ . With the decrease of pH values and dissolved oxygen concentrations, the removals of NDMA were enhanced in all reaction systems. NDMA was mainly reduced to unsymmetrical dimethylhydrazine (UDMH) in Zn and Zn/Mn 2+ systems. It was mainly reduced to dimethylamine (DMA) and ammonium (NH 4 + ) in Zn/Co 2+ and Zn/Ni 2+ systems. There were undetected products in all reaction systems. Catalytic hydrogenation was the main mechanism, and active hydrogen atom was the main active species. The presence of Mn 2+ , Co 2+ and Ni 2+ promoted the corrosion of Zn and changed the surface morphology of Zn. The formation of type I film on Zn surface was promoted in the presence of Co 2+ and Ni 2+ , which was conducive to the continuous corrosion of Zn and hydrogen generation. While type II film which would inhibit the corrosion of Zn formed on Zn surface in the presence of Mn 2+ . MnO 2 , Co 3 O 4 and Ni(OH) 2 were formed in Zn/Mn 2+ , Zn/Co 2+ and Zn/Ni 2+ systems, respectively. They would facilitate more generation of active hydrogen atoms.
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Yujia Song,Li Tian,Ruidan Li,Yanjia Guo,Pengfei Han,Guangping Ma,Hanyue Jiang,Wenzhuo Wang,Juan Lu
In this work, g-C 3 N 4 of N-rich vacancy (CNNV) and mesoporous SiO 2 were synthesized. A novel electrochemiluminescence (ECL) sensor for curcumin (Cur) based on CNNV@SiO 2 and Ti 2 AlC was constructed. An initial ECL signal was generated from the CNNV-S 2 O 8 2 − system. SiO 2 significantly adsorbed more S 2 O 8 2 − , thereby enhancing the ECL signal. Ti 2 AlC served as an effective co-reaction promoter, further amplifying the ECL signal of CNNV@SiO 2 -S 2 O 8 2 − system. With the addition of Cur, the ECL signal also decreased, which can be attributed to the resonance energy transfer (RET) mechanism between CNNV (donor) and Cur (acceptor). Under optimal conditions, a strong linear relationship was observed between the change in ECL signal (ΔI) and the logarithm of Cur concentration (lgC Cur ), spanning from 5 × 10 −15 to 5 × 10 −9 mol L −1 with a detection limit of 1.7 × 10 −15 mol L −1 . The constructed ECL sensor was successfully applied to detect Cur in real samples.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemSusChem
·
2024
·
IF 7.5
Yanxiang He,Meilian Tu,Weijiang Gan,Zhixiao Zhu,Muhammad Mushtaq,Mohammad Al-Mamun,Jianqiu Deng,Hao Yang,Zhongmin Wang,M.-Sadeeq Balogun
Graphical A high-performance heterogeneous N-doped FeMoO 4 -Mo 2 N electrocatalyst was synthesized and applied as HER electrocatalyst in alkaline freshwater and alkaline seawater. Benefiting from the individual properties of both N-doped FeMoO 4 and Mo 2 N, the optimized FeMoO 4 -Mo 2 N electrocatalyst requires low overpotentials of 23 and 29 mV to afford 10 mA cm −2 in 1 M KOH freshwater and seawater electrolytes, respectively. Durable and efficient Fe-based electrocatalysts in alkaline freshwater/seawater electrolysis is highly desirable but persists a significant challenge. Herein, we report a durable and robust heterogenous nitrogen-doped FeMoO 4 /Mo 2 N rod-shaped catalyst on nickel foam (denoted NF@FMO/MN) affording hydrogen evolution reaction (HER) low overpotentials of 23/29 mV@10 mA cm −2 and 112/159 mV@100 mA cm −2 in both alkaline freshwater/seawater electrolytes, respectively. These results are significantly superior to the pristine FeMoO 4 catalyst. Theoretical calculations consistently reveals that the combination of N-FeMoO 4 and Mo 2 N effectively reduces water activation energy barrier, modulates the sluggish water-dissociation kinetics and accelerates the hydrogen adsorption process for efficient HER. The enhanced HER performance of the as-designed NF@FMO/MN catalyst is attributed to the in situ hetero-interfacial engineering between N-doped FeMoO 4 and Mo 2 N. This present work nurtures the progress of FeMo-based electrocatalysts in alkaline freshwater/seawater electrolysis.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Lu Hao,Ji Li,Xinxing Wang,Bin Yue,Hong Shao,Feng Li,Tianqi Wang,Xiangting Dong
N-butanol, due to its poisonous and flammable nature, poses a significant danger to human health, making it crucial to monitor its presence in the environment. In this work, FeVO 4 nanofibers (550) with a one-dimensional (1D) structure have been successfully fabricated through a simple electrospinning combined with calcination at 550 °C. FeVO 4 nanofibers (550) exhibit a triclinic crystal structure and possess a 1D fiber morphology. Electrospun FeVO 4 nanofibers (550) are firstly used in gas sensing and have superior performance as n-butanol gas sensors. At an optimized working temperature of 300 °C, FeVO 4 nanofibers (550) achieve a peak response of 4.05 to 100 ppm n-butanol, short response/recovery time (3 and 14 s), remarkable selectivity for n-butanol gas compared to other tested gases. Mechanism of 1D FeVO 4 nanofibers (550) for enhanced gas sensing properties is clarified. Thus, FeVO 4 nanofibers (550) are a potentially promising substitute to the sensing layer of gas sensors.
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2024
·
IF 6.7
Yiting Jiang,Zhejie Chen,Yating Yuan,Linxin Tian,Chuhuang Dong,Wencheng Shen,Jinchao Wei,Shengpeng Wang,Yu Yang,Jia Ge
Alpha-glucosidase (α-Glu) is a hydrolase that promotes the rise of glucose in the blood during the digestion process, and it plays a crucial role in regulating glucose levels within a normal range. Herein, we developed an ultrasensitive colorimetric platform by preparing a Cu–N–C single-atom nanozyme (Cu–N–C SAzyme) with a potent oxidase-like effect on accurately detection of α-Glu and efficient screening of its potential inhibitors. This artificial nanoenzyme was able to catalyze the oxidation of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to blue oxide (oxTMB) without the assistance of H 2 O 2 . In addition, with the participation of α-Glu, l -ascorbic acid-2- O -α- d -glucopyranose (AAG) can be catalyzed to produce ascorbic acid (AA), which significantly reduces the oxidation, resulting in a noticeable fading of the blue color. Therefore, we designed a straightforward colorimetric test for α-Glu activity, achieving detection limits as low as 0.09 U/L and a linear response from 0.25 to 8 U/L. Most importantly, this platform has been effectively applied to measure α-Glu in real samples.
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Cong Liu,Chen Zuo,Qifan Xue,Dongxu Lin,Tao Liu,Jun Luo,Hao Huang,Kai Chen,Yanyan Gao,Jie Zeng,Yong Zhang,Baomin Xu,Tao Yang,Yaohua Mai,Bingsuo Zou,Christoph J. Brabec,Xiaotian Hu
A strong n-type perovskite layer is crucial in achieving high open-circuit voltage ( V OC ) and power conversion efficiency (PCE) in the p-i-n solar cells, as the weak n-type perovskites result in a loss of V OC , and the p-type perovskites contain numerous electron traps that cause the severe carrier recombination. Here, three types of perylene diimide (PDI) based small molecule dopants with different dimensions, including 1D-PDI, 2D-PDI, and 3D-PDI are designed, to produce heavier n-type perovskites. The PDI-based molecules with Selenium atoms have a strong electron-donating ability, effectively enlarging the quasi-Fermi level splitting within the perovskites. Besides, the PDI molecules can coat the surface of the perovskite crystal to form the lattice cage through their conjugate skeletons, which passivates the trap states and improves the n-doping efficiency, as well as the stabilities of perovskites and related devices. With the addition of the 2D-PDI, the small-area solar cells achieved a PCE of 26.06% (25.44% certified) with a high V OC of 1.18 V and a remarkable fill factor of 87.23%. Furthermore, the rigid and flexible perovskite solar modules yielded high PCEs of 21.48% and 20.71%, respectively. This dimensional regulation strategy provides useful guidance for effective n-type doping and high-performance p-i-n solar cells.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Haiyan Wang,Peizeng Yang,Yiqian Song,Deyang Kong,Junhe Lu
UV-based treatment technologies have been widely applied in wastewater treatment plants due to its high efficiency in deactivating pathogens and degrading organic contaminants. However, this study demonstrates that N -nitrosodimethylamine (NDMA), a probable human carcinogen, can be generated during UV treatment of dimethylamine (DMA) pollutants of concern, for example isoproturon (IPU), in the presence of nitrite (NO 2 – ). Quenching tests have identified that in addition to direct photolysis, hydroxyl radicals (HO • ) and nitrogen oxide radicals (NO • and NO 2 • ) generated from NO 2 – photolysis play a crucial role in the reaction. They can react with IPU, leading to hydroxylated and nitrated products. More importantly, NO 2 • couples with a NO • or another NO 2 • to form N 2 O 3 and N 2 O 4 , respectively. As nitrosating agents, N 2 O 3 and N 2 O 4 directly attack the released DMA during IPU degradation, yielding NDMA. At IPU initial concentration of 50 μM, the highest concentration of NDMA was 5.62 μg/L in 2.5 h by UV/NO 2 – , corresponding to the molar yield of 0.22%. This study further reveals that other dimethylamine compounds, such as diuron, imipramine, and tetracyclines, can also serve as NDMA precursors during UV disinfection with NO 2 – present. Given that many environmental contaminants contain DMA moieties and NO 2 – is ubiquitously present in wastewaters, formation of NDMA during UV disinfection is probably a common but overlooked problem, which deserves emerging concern.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Yanping Dong,Xiqiang Tian,Hongji Zhao
Highly efficient synthesis of valuable furfuryl alcohol by furfural hydrogenation is still a challenge for Pt-based catalysts under mild conditions. Herein, we report the synthesis of N-doped TiO 2 nanosheets (N–TiO 2 –ST) by a simple one-step hydrothermal method. Subsequently, platinum catalysts were loaded onto N-doped TiO 2 nanosheets using a simple impregnation method followed by reduction with sodium borohydride (NaBH 4 ). The resulting catalysts exhibited excellent catalytic performance in the hydrogenation of furfural. Especially, the turnover frequency (TOF) of Pt/N–TiO 2 –ST reached 694 h -1 , much higher than that of Pt/TiO 2 -ST (565 h -1 ). Furthermore, the structure and surface properties of as-prepared samples was characterized with the combination of XRD, Raman, N 2 adsorption-desorption, SEM, TEM, XPS, CO chemisorption and CO-FTIR. The excellent catalytic performance of Pt/N–TiO 2 –ST can be ascribed to higher surface area and surface defects (oxygen vacancies) on the N-TiO 2 nanosheets, which improves the diffusion of Pt species on the support surface and forms ultrafine Pt particles to expose more active sites (Pt 0 species) for selective adsorption and activation of C O groups of furfural. The results show that Pt/N–TiO 2 –ST is a viable and promising catalyst for furfural hydrogenation.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Yuancheng He,Zhimeng Shen,Shujun Zhang,Gaobo Chang,Cheng Huang,Zhong Li,Hanqing Zhao
The addition of carbon nanotubes (CNTs) and graphene (G) to nitrogen-doped carbon nanofibers (N–C/CNFs) greatly improves their performance as sodium ion battery anodes. However, there is currently limited research on whether the introduction of nanocarbon materials will affect the surface functional groups, defects, and material structure. Herein, the classical G and CNT were introduced into the N–C/CNFs. And the addition of G promotes the transformation of nitrogen-containing functional groups (NFGs), resulting in a substantial pore structure and an enlarged interlayer distance, which enhances the macroscopic electrochemical performance significantly. The nitrogen-doped graphene/carbon composite nanofibers (N–G/CNFs) exhibit superior electrochemical performance compared to N–C/CNFs and nitrogen-doped carbon nanotube/carbon composite nanofibers (N–CNT/CNFs). After 200 cycles, the N–G/CNFs demonstrate a reversible capacity of 295 mA h g−1 at 0.05 A g−1, significantly higher than the capacities of N–C/CNFs (193 mA h g−1) and N–CNT/CNFs (237 mA h g−1). The Na3V2(PO4)3@C//N–G/CNFs exhibit promising energy and power densities.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）