MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Hong Tian,Yumin Li,Qingping Dai,Shunlang Wei,Bing Lv,Jun Wei,Yupei Qiao
FeVO 4 is recognized as a potential photoelectrode material on account of its relatively narrow bandgap and suitable conduction and valence band positions. However, its photoelectrochemical water splitting performance remains unsatisfactory owing to rapid carrier recombination and poor charge transport capabilities. Herein, a novel p-n FeVO 4 /AgVO 3 heterostructure photoanode was developed by depositing p-type AgVO 3 nanowires onto n-type FeVO 4 nanoporous structures, boosting the PEC properties of the base material. The incorporated AgVO 3 nanostructures enhance light absorption in the visible spectrum, facilitate effective electron-hole separation through optimized interfacial charge transport pathways, and simultaneously extend the carrier lifetime. The built-in electric field in the p-n heterostructure promotes more effective separation and directional motion of photoinduced charge carriers. As a result, the transient photocurrent density of the FeVO 4 /AgVO 3 heterojunction photoanode reaches 0.22 mA cm −2 , which is 3.35 times that of bare FeVO 4 (0.06 mA cm −2 ). Notably, the incorporation of AgVO 3 nanowires significantly improves the photostability of the FeVO 4 photoanode. This work provides a feasible strategy from the perspective of interface engineering for designing high-performance FeVO 4 -based photoelectrodes to enhance photoconversion efficiency.
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Surfaces and Interfaces
·
2025
·
IF 6.3
Ying-Jiao He,Liang-Hong Shu,Yan Xiong,Qun-Zeng Huang
Development of highly-efficient heterostructured photocatalysts capable of fully utilizing full solar spectrum has emerged as a focal point in photocatalytic H 2 evolution from water splitting. Herein, Mn 0.2 Cd 0.8 S/MoSe 2 composite was successfully constructed by attaching full-spectrum responsive MoSe 2 nanospheres on surface of Mn 0.2 Cd 0.8 S polyhedra via in-situ hydrothermal process. The optimal Mn 0.2 Cd 0.8 S/MoSe 2 -5wt% composite photocatalyst yielded the H 2 evolution rate of 34.31 mmol g –1 h –1 under full-spectrum light, significantly surpassing the activities obtained under near-infrared (NIR), ultraviolet (UV), visible (Vis), Vis-NIR and UV-Vis light alone. This outstanding property could be attributed to the synergetic effects of p−n heterojunction and photothermal effect, effectively accelerating interfacial charge transfer, elevating reaction system's temperature and expediting surface reaction, thereby promoting the photocatalytic reaction of Mn 0.2 Cd 0.8 S. This study offers a valuable perspective on utilizing MoSe 2 to construct an efficient photothermal-assisted photocatalysis system.
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Molecular Catalysis
·
2025
·
IF 4.9
Xingguo Yang,Xinhuan Lu,Qinjun Zhang,Hao Liu,Haotian Guo,Lin Zhao,Dan Zhou,Qinghua Xia
The selective hydrogenation of cinnamaldehyde (CAL) to cinnamyl alcohol (COL) is challenging because the hydrogenation of C = C bonds is thermodynamically favored over that of the C = O group. In this work, Ni 3 /Fe@CN-x materials prepared by loading metal Ni onto carbon materials derived from Fe-ZIF were successfully used to selectively hydrogenate the C = O bond of cinnamaldehyde, while single metal Ni@CN-x materials derived from Ni-ZIF materials were successfully used to selectively hydrogenate the C = C bond in the side chain of CAL. Both catalysts shows admirable catalytic activity in the selective hydrogenation reaction of CAL. The reaction results show that the introduction of Ni species into Fe@CN-350 material significantly improved the conversion of CAL and the selectivity of COL, which is attributed to the synergistic effect of bimetallic Ni and Fe, and the excellent hydrogenation activity of metallic Ni. The Ni 3 /Fe@CN-350 catalytic system can achieved 94.3 % CAL conversion and 86.3 % COL selectivity, and the catalyst could be stably recycled 5 times. Under mild conditions (90 °C, 4 h), the single metal Ni@CN-600 catalytic system achieved 100 % CAL conversion and >99 % hydrocinnamaldehyde (HCAL) selectivity, and the catalyst could be stably recycled 10 times.
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Journal of Physical Chemistry Letters
·
2025
·
IF 4.6
Weidong Liang,Yong Zhang,Dongniu Wang,Jianzhao Peng,Jinshuo Zou,Huiqi Li,Zhongxin Song,Manlin Tan,Jun Yu,Lei Zhang
Optimizing the electronic structures of metal sites is desirable for high intrinsic activity. Incorporated metal atoms in a carbon substrate can establish strong electronic interaction with loaded metal oxides. However, this structure may be unstable in a harsh oxygen evolution reaction (OER) environment. Herein, we take the NiSAFe sample of Ni–N–C supported Fe2O3 nanoparticles (NPs) as an example. Both in situ and ex situ characterizations show that the OER activation process facilitates the transformation of Ni single atoms into atomically dispersed NiOOH active species while retaining Fe2O3 NPs. Accordingly, abundant structural defects are formed in the carbon support, enhancing electron transfer and upshifting the d-band center of the NiFe catalyst. As a result, the catalyst exhibits accelerated OER kinetics and optimized adsorption energies for reaction intermediates, delivering outstanding intrinsic activity. A low overpotential of 230 mV at 10 mA cm–2 and a turnover frequency (TOF) more than 9 times higher than that of commercial RuO2 are achieved.
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DOI
PubMed
高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2014
·Vol. 30
·期 1
·150-156
·
IF 0.886
YANG Bing-Jian,WANG Hong,Li Lei,HUANG Bo-Wen,LIAO Xiao-Zhen,HE Yu-Shi,MA Zi-Feng
The development of low-cost and effective electrocatalysts for air electrodes is critical for practical applications of lithium/oxygen batteries. In the present work, phenanthroline (phen) was used as a ligand to prepare a Co(phen)2 complex. The Co(phen)2 complex
was coated on BP2000 and then heat treated at 600, 700, 800, and 900 , to obtain carbon-supported Co-N (Co-N/C) catalysts. The catalytic activities in oxygen reduction reaction/oxygen evolution reaction (ORR/OER) of the prepared catalysts were measured and compared with those of a typical
carbon-supported cobalt tetramethoxyphenylporphyrin (CoTMPP/C) catalyst. The influence of the calcination temperature on the composition and structure of the Co-N/C catalysts was investigated. Electrochemical tests showed that the Co-N/C catalysts prepared at 700 and 800 gave better performances,
comparable to that of the CoTMPP/C catalyst. The superior electrochemical performance of the prepared Co-N/C catalysts and the low cost of the phenanthroline chelating agent make Co-N/C a promising cheap catalyst for lithium/oxygen batteries.
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INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Xiaoyu Jia,Chenxu Zhang,Yongcai Zhang,Enren Zhang
In this study, Fe/N/Cs oxygen reduction reaction (ORR) catalysts with high specific surface area, catalytic activity were synthesized using legume biomass with different protein content. The catalytic activity of the Fe/N/C catalysts was confirmed to be related to the protein content of the biomass precursor by characterization and electrochemical tests. The catalysts (named as Fe/N/C-T) from lactone tofu have the highest N/C ratio related to ORR, and the air-cathode loaded with Fe/N/C-T catalysts exhibited the best ORR performance in linear sweep voltammetry (LSV) tests, which was comparable to that of commercial Pt/C catalysts. MFCs with AC(Fe/N/C-T) air-cathode produced a maximum power density of 0.486 mW cm −2 , higher than Pt/C (0.437 mW cm −2 ) with the same loading. In addition, the Fe/N/C-T catalyst demonstrated high stability and resistance to toxicity in long-term operation, which can be an alternative to commercial Pt/C.
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DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Feng Wei,Yuchen Guo,Shichao Wang,Yaojie Gao,Jun Qiao,Songlin Ran,Mengcheng Han
Supercapacitors (SCs) have been widely used owing to their merits of long cycle life, excellent physiochemical stability and zero-carbon emission. However, the low energy density of SCs restricts their further applications. Herein, the N, P doped carbon nanosheets (NPCNs) were prepared by using silicon-removed carbon as carbon resource derived from rice husk . The as-prepared NPCN not only possesses a large surface area of 1701.6 m 2 g −1 and a high ratio of mesopore volume to total pore volume (62.11 %) for adsorption and transfer of electrolyte ions , but also has a suitable nitrogen and phosphorus content for electron conduction and contribution of additional active sites to generate pseudo-capacitance through redox. Therefore, the excellent electrochemical properties have been obtained for NPCN-based SCs in the alkaline electrolyte , e.g. satisfactory capacitance of 396.1 F g −1 at 0.1 A g −1 , outstanding rate properties of 319.2 F g −1 at 40 A g −1 , long cyclability with capacitance decay of 0.95 % after 30,000 cycles. Additionally, the energy density of the NPCN-based SCs with neutral electrolyte and ionic liquid electrolyte increased 2.67-fold and 11-fold to 33.25 and 137.24 Wh kg −1 , respectively. This study opens up a feasible route by crafting heteroatoms and using high voltage window electrolyte to obtain the high energy density for SCs.
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高影响因子
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
·
2022
·Vol. 2022
·期 33
·e202200316
·
IF 3.261
Yong Wang,Hui Wang,Qifan Yang,Shihua Xie,Hongjun Zhu
Graphical Herein, palladium(II)-catalyzed halogenation of 2-phenylquinazolines using N -halosuccinimides as halogen sources was described via C−H activation under mild reaction conditions. A series of halogen-substituted 2-arylquinazolines were synthesized through C−H functionalization. An efficient quinazoline-assisted ortho -halogenation of 2-arylquinazolines has been developed using N -halosuccinimides as halogen sources with Pd(II)-catalyzed C−H bond activation. No additional ligand and oxidant are required. This protocol is highly regioselective and applicable to a broad range of quinazoline substrates bearing different functional groups, giving yields of up to 98 %. The mechanism of the quinazoline ortho -halogenation was investigated by comprehensive experimentation.
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高影响因子
Frontiers of Chemical Science and Engineering
·
2021
·Vol. 15
·期 5
·1312-1321
·
IF 4.204
Wang Wei,Lv Haijun,Du Juan,Chen Aibing
In this present work, N-doped carbon nanobelts (N-CNBs) were prepared by a confined-pyrolysis approach and the N-CNBs were derived from a polypyrrole (Ppy) tube coated with a compact silica layer. The silica layer provided a confined space for the Ppy pyrolysis, thereby hindering the rapid overflow of pyrolysis gas, which is the activator for the formation of carbonaceous materials. At the same time, the confined environment can activate the carbon shell to create a thin wall and strip the carbon tube into belt morphology. This process of confined pyrolysis realizes self-activation during the pyrolysis of Ppy to obtain the carbon nanobelts without adding any additional activator, which reduces pollution and preparation cost. In addition, this approach is simple to operate and avoids the disadvantages of other methods that consume time and materials. The as-prepared N-CNB shows cross-linked nanobelt morphology and a rich porous structure with a large specific surface area. As supercapacitor electrode materials, the N-CNB can present abundant active sites, and exhibits a specific capacitance of 246 F·g −1 , and excellent ability with 95.44% retention after 10000 cycles. This indicates that the N-CNB is an ideal candidate as a supercapacitor electrode material.
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高影响因子
SOLAR ENERGY
·
2016
·
IF 3.685
Haifeng Yang,Jincheng Zhang,Chunfu Zhang,Jingjing Chang,Zhenhua Lin,Dazheng Chen,Xu Sun,He Xi,Genquan Han,Yue Hao
In this work, we demonstrated a high performance planar heterojunction perovskite solar cell with the polyethylenimine ethoxylated (PEIE) interlayer. By adopting a less polar solvent for PEIE, enhanced device performance and uniformity are achieved. The power conversion efficiency (PCE) of the best device increases by 22% compared to the reference device and reaches 14.82% with J SC of 19.45 mA/cm 2 , V OC of 1.00 V, and FF of 76.31% under AM 1.5G 100 mW/cm 2 light illumination. The UPS measurement shows that the PEIE layer can effectively decrease the energy offset between PCBM and metal electrode. The recombination mechanism was explored by measuring V OC and J SC at various light intensities from 100 to 0.1 mW/cm 2 . It shows that the PEIE layer can suppress the trap-assisted recombination for the devices. The enhancement of the probability of the carriers collection also shows that the recombination is reduced by the PEIE interlayer. Moreover, it is found PEIE layer can improve the stability of the device.
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高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2020
·Vol. 20
·期 12
·7610-7617
·
IF 1.134
Chen Zhongzhen,Huang Haiping,Chen Yanan,Ye Ying,Wu Shuzhen,Wang Wenjing,Hu Yongmei
A novel nanocomposite of N-Doped Carbon Quantum Dots@Carbon Nanotubes was synthesized in this study for electrochemical detection of bisphenol A by differential pulse voltammetry. The nanocomposite was characterized by transmission electron microscopy, scanning electron microscopy,
X-ray powder diffraction and Fourier transform infrared spectroscopy. Electrochemical properties of the nanocomposite modified glassy carbon electrodes were studied via cyclic voltammetry. Differential pulse voltammetry experimental results showed that N-Doped Carbon Quantum Dots@Carbon Nanotubes/glassy
carbon electrode exhibited excellent catalysis activity towards electrochemical oxidation of bisphenol A. The oxidation peak current was linearly increased with concentration of bisphenol A in the range from 0.4 μM to 40 μM, with a limit of detection of 65 nM.
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高影响因子
RSC Advances
·
2021
·Vol. 11
·期 56
·35663-35672
·
IF 3.361
Fang Wang,Zhenzhou Zhu,Jia Guo
ZnO and g-C3N4 provide excellent photocatalytic properties for degradation of antibiotics in pharmaceutical wastewater. In this work, 2D–2D ZnO/N doped g-C3N4 (NCN) composite photocatalysts were prepared for degradation of tetracycline (TC), ciprofloxacin (CIP) and ofloxacin (OFLX). The addition of ZnO resulted in higher separation efficiency and lower recombination rate of photogenerated charge under visible light. The composite photocatalyst showed better degradation performance compared to ZnO or NCN alone. The TC degradation reached 81.3% in 15 minutes by applying the prepared 20% ZnO/NCN composite photocatalyst, showing great competitiveness among literature reported g-C3N4 based photocatalysts. After 30 minutes, the degradation rate of TC, CIP and OFLX reached 82.4%, 64.4% and 78.2%, respectively. The TC degradation constant of the composite photocatalyst was 2.7 times and 6.4 times higher than NCN and CN, respectively. Radical trapping experiments indicated that ·O2− was the dominant active substance. The transference of excited electrons from the conduction band (CB) of NCN to ZnO enhanced the separation of photogenerated electron–hole pairs and simultaneously suppressed their recombination. This study provides a possibility for the design of high-performance photocatalysts for antibiotics degradation in wastewater.
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