Surfaces and Interfaces
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2025
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IF 6.3
Xiyu Zou,Yuzhe Hua,Xiangyang Du,Yunan Shen,Zilong Chen,Huachong Chen,Hui Sui,Guangmin Ren,Qingjie Guo,Man Wu,Hongjing Tian
Addressing such limitations of traditional photocatalysts as poor visible light absorption, substantial electron-hole recombination, and inefficient reactive oxygen species (ROS) generation is crucial. In this paper, oxygen vacancies (OVs) rich Bi 2 MoO 6 (BMO)/ZnSe S-scheme heterojunction was successfully prepared using a simple and mild solvothermal method. The introduction of OVs effectively shortened the band gap and increased the visible light absorption range. The mechanism of inducing OVs into BMO by adapting the concentration of surfactants was uncovered using both experimental and DFT simulation results. OVs-BMO/ZnSe exhibited an enhanced charge transfer capacity because OVs facilitated the formation of a rapid electron transfer pathway at the heterojunction interface. The synergistic effect of OVs and S-scheme heterojunction could effectively inhibit the recombination of photogenerated carriers. Its degradation efficiency and turnover frequency per wattage of light (TOF/P) reached 92.1% and 854.98 × 10 -10 (mol·g −1 ·J -1 ), respectively, during the low power LED white light-driven photocatalytic degradation of 50mg/L TC. The high value of TOF/P demonstrated its practical application potential in comparison with some other reported photocatalysts. Liquid Chromatography-Mass Spectrometry (LC-MS) characterization and ECOSAR simulation results indicated that OVs promoted the generation of ROS, in which ·O–2, 1 O 2 and h + significantly reduced the toxicity of intermediate products.
研究领域:
环境科学
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材料科学
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化学工程
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纳米技术
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产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2020
·Vol. 36
·期 5
·816-820
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IF 1.063
Chu Ning,Xu Shuping,Xu Weiqing
Two different kinds of configurations of 1,4-bis[2-(4-pyridyl)ethenyl]-benzene( trans -bpeb and cis -bpeb) were achieved, and a bpeb dimer was synthesized in dimethyl sulfoxide(DMSO). Compared with the previous work that synthesized the bpeb dimer or polymer in crystal with a template agent needed, the reaction occurred in a solution phase in the present method. A hand-held ultraviolet lamp(365 nm) with the power of 12 W and the Watt density of 0.35 mW/cm 2 can realize the photodimerization of bpeb, instead of the high-power mercury lamp in most previous studies. Unlike other 2+2 cycloaddition in liquid state using catalysts even noble metals, no catalysts were required here, which is cost-saving. Only the trans -pbeb can start the cycloaddition and the formation of the close J-aggregations of trans -pbeb in DMSO is a precondition for explaining the 2+2 photodimerization. The productivity for the 2+2 cycloaddition product was achieved as 55.6%.
研究领域:
有机化学
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光化学
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超分子化学
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材料化学
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合成方法学
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DOI
高影响因子
Nature Communications
·
2018
·Vol. 9
·期 1
·1-9
·
IF 12.353
Zheng Wei,Huang Ping,Gong Zhongliang,Tu Datao,Xu Jin,Zou Qilin,Li Renfu,You Wenwu,Bünzli Jean-Claude G.,Chen Xueyuan
All-inorganic CsPbX 3 (X = Cl, Br, and I) perovskite quantum dots (PeQDs) have shown great promise in optoelectronics and photovoltaics owing to their outstanding linear optical properties; however, nonlinear upconversion is limited by the small cross-section of multiphoton absorption, necessitating high power density excitation. Herein, we report a convenient and versatile strategy to fine tuning the upconversion luminescence in CsPbX 3 PeQDs through sensitization by lanthanide-doped nanoparticles. Full-color emission with wavelengths beyond the availability of lanthanides is achieved through tailoring of the PeQDs bandgap, in parallel with the inherent high conversion efficiency of energy transfer upconversion under low power density excitation. Importantly, the luminescent lifetimes of the excitons can be enormously lengthened from the intrinsic nanosecond scale to milliseconds depending on the lifetimes of lanthanide ions. These findings provide a general approach to stimulate photon upconversion in PeQDs, thereby opening up a new avenue for exploring novel and versatile applications of PeQDs.
研究领域:
光学材料
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光电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Photonics
·
2024
·
IF 32.3
Ming Jiang,Chen Ying,Miao Han,Fan Yong,Wang Shangfeng,Chen Zihan,Guo Zhenhao,Guo Zhixiu,Qi Luyin,Wang Xusheng,Yun Baofeng,Pei Peng,He Haisheng,Zhang Hongxin,Tang Yun,Zhao Dongyuan,Wong Gary Ka-Leung,Bünzli Jean-Claude G.,Zhang Fan
The demand for near-infrared (700–1,700 nm) materials in optical communications, laser sources and biological imaging applications has led to extensive research on lanthanide-doped nanoparticles, owing to their nanostructure modulation and interface property tunability. However, the low molar extinction coefficient of conventional lanthanide sensitizers limits the brightness of lanthanide near-infrared nanoparticles for applications in low-power excitation scenarios. Here we introduce Na 3 CrF 6 , a new crystalline nanoparticle that serves as both sensitizer and host for high-brightness near-infrared emission from lanthanide activators (Er 3+ , Tm 3+ , Yb 3+ or Nd 3+ ). We demonstrate an increase in brightness of up to 370 times compared with the most intense conventional lanthanide-sensitized nanoparticles. This discovery is also validated for other lanthanide-doped nanoparticles sensitized with low-cost transition metals (Mn 2+ or Ni 2+ ). Our transition metal-based nanoparticles represent a powerful toolbox to enable high signal-to-noise-ratio labelling and imaging with low-power excitation sources such as white light-emitting diode or persistent luminescence materials. This work paves the way for next-generation high-brightness near-infrared luminescence systems, suited for a wide range of low-illumination excitation applications.
研究领域:
材料科学
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光学
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纳米技术
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生物医学工程
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产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2023
·Vol. 35
·期 22
·2300380
·
IF 29.4
Jun Li,Chaofeng Wang,Shuilin Wu,Zhenduo Cui,Yufeng Zheng,Zhaoyang Li,Hui Jiang,Shengli Zhu,Xiangmei Liu
Currently, the global COVID-19 pandemic has significantly increased the public attention toward the spread of pathogenic viruses and bacteria on various high-frequency touch surfaces. Developing a self-disinfecting coating on a touchscreen is an urgent and meaningful task. Superlattice materials are among the most promising photocatalysts owing to their efficient charge transfer in abundant heterointerfaces. However, excess electronic defects at the heterointerfaces result in the loss of substantial amounts of photogenerated charge carrier. In this study, a ZnO Fe 2 O 3 superlattice nanofilm is designed via atomic layer deposition for photocatalytic bactericidal and virucidal touchscreen. Additionally, electronic defects in the superlattice heterointerface are engineered. Photogenerated electrons and holes will be rapidly separated and transferred into ZnO and Fe 2 O 3 across the heterointerfaces owing to the formation of Zn O, Fe O, and Zn Fe covalent bonds at the heterointerfaces, where ZnO and Fe 2 O 3 function as electronic donors and receptors, respectively. The high generation capacity of reactive oxygen species results in a high antibacterial and antiviral efficacy (>90%) even against drug-resistant bacteria and H1N1 viruses under simulated solar or low-power LED light irradiation. Meanwhile, this superlattice nanofilm on a touchscreen shows excellent light transmission (>90%), abrasion resistance (10 6 times the round-trip friction), and biocompatibility.
研究领域:
材料科学
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纳米技术
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光催化
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细菌学
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病毒学
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表面科学
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光电子学
✓ 已验证
DOI
PubMed
高影响因子
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