JOURNAL OF ELECTRONIC MATERIALS
·
2019
·Vol. 48
·期 6
·3890-3899
·
IF 1.676
Xia Yongmei,Su Jiangbin,He Zuming
Promising mesoporous Bi 24 O 31 Br 10 /SrTiO 3 (BOB/STO) nanocomposites were successfully designed and fabricated via a three-step approach. The morphology, structure, optical performance, surface area and pore-size distribution of the products were characterized by x-ray powder diffraction, x-ray photoelectron spectroscopy, field-emission scanning electron microscopy, transmission electron microscopy, energy-dispersive x-ray spectroscopy, diffuse reflectance spectroscopy and Brunner–Emmett–Teller analysis. The results indicate that BOB/STO nanocomposites are composed of perovskite STO nanoparticles and monoclinic BOB nanosheets. Compared with pure STO nanoparticles or BOB nanosheets, the mesoporous BOB/STO nanocomposites show a much better photocatalytic activity for the removal of methyl orange solution under simulated sunlight irradiation. In particular, the 10% BOB/STO composite is found to be the optimal composite, over which the dye decomposition reaches 95.3% for 100 min. The photocatalytic decomposition rate of the 10% BOB/STO nanocomposite is found to be 3.4 and 4.09 times higher than that of bare BOB and STO, respectively. The enhanced photocatalytic performance of the BOB/STO nanocomposites is attributed to the efficient charge separation and reduced recombination probability of photogenerated electron–hole (e − –h + ) pairs. Furthermore, the BOB/STO nanocomposites show the considerable stability and recycling capacity in the reaction process. In addition, the photocatalytic mechanism of the BOB/STO nanocomposites is explained by a plausible Z-scheme heterojunction.
研究领域:
材料科学
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环境科学
·
化学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 6
·4822-4835
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IF 2.22
Zhou Nan,Tan Junjie,Li Xi,Wang Lu,Jin Chenglong,Chen Ming,Yu Zhengsong,Liang Yani,Qiu Zhidong,Li Wenlong,Dong Yulin,Xie Zhizhong,Lin Yawei,Qu Deyu,Zhang Chaocan
A series of Bi 5 O 7 I/MIL-53(Fe) (BOI/MIL- w ) composites were successfully prepared by a facile in-situ solvothermal approach. The matched energy bands enabled Bi 5 O 7 I and MIL-53(Fe) to form a Z-scheme heterojunction which resulted in an efficient separation of the photo-induced electron–hole pairs. The photocatalytic activity of BOI/MIL- w was evaluated by the degradation of Rhodamine B (RhB) in water under the visible light irradiation. Compared with Bi 5 O 7 I, photocatalytic performances of BOI/MIL- w notably boosted. When the content of added MIL-53(Fe) was 3 wt%, BOI/MIL-3 presented the highest activity with a degradation efficiency of 99.7% only after 60 min of irradiation. The reaction rate constant k could reach 0.0992 min −1 which was nearly 12.6 times as high as that of Bi 5 O 7 I. Moreover, BOI/MIL- w had a good stability and reusability, which could ensure its practical application. Trapping experiments confirmed that h + and ·O 2 − were the dominant active species during the photocatalytic process, and further demonstrated the formation of the Z-scheme heterojunction facilitated the photocatalytic performance of BOI/MIL- w .
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2024
·Vol. 26
·期 24
·3194-3205
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IF 2.6
Huimin Du,Yanyang Li,Mengran Ouyang,Meifang Liu,Shanshan Hu,Jun Yang
Yb3+/Er3+-doped Bi2(MoO4)3−z(WO4)z phosphors were synthesized via a hydrothermal method combined with subsequent calcination. Under the excitation of a light source of 980 nm, Bi2(MoO4)3:Yb3+/Er3+ phosphors exhibited strong upconversion green light and weak red light emissions. By doping WO42− in Bi2(MoO4)3:Yb3+/Er3+ phosphors, the upconversion luminescence intensity of the phosphors significantly enhanced, which is 42 times higher than that of the undoped WO42− phosphor. With an increase in WO42− doping content, the final color coordinates of Bi2(MoO4)3−z(WO4)z:Yb3+/Er3+ phosphors were (0.2352, 0.7274), which is closer to the standard green CIE coordinates. The maximum CP of WO42−-doped phosphors is as high as 116.68%, which is 74.44% higher than that of the undoped WO42− phosphor. Based on the thermally coupled energy levels (TCLs) of Er3+ (2H11/2/4S3/2 → 4I15/2) in Bi2(MoO4)2.7(WO4)0.3:14%Yb3+,3%Er3+ phosphor, the SR value reached a maximum of 0.0081 K−1 at 323 K and the SA value reached a maximum of 0.0099 K−1 at 398 K. The obtained Bi2(MoO4)3−z(WO4)z:Yb3+/Er3+ phosphors are suitable for upconversion luminescent materials for green displays and have potential advantages in optical temperature measurement.
研究领域:
材料科学
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光学
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产品关联
DOI
高影响因子
MOLECULAR CELL
·
2025
·
IF 16.6
Jianfeng He,Yongyi Zhu,Zichao Tian,Mengqin Liu,Anmin Gao,Wangmi Fu,Fei Lu,Yutong Sun,Yajun Guo,Rongqing Pan,Yuchen Ji,Jianxiang Chen,Huasong Lu,Juan Lin,Xingguo Liang,Chun Kim,Chun Zhou,Huipeng Jiao
Z-DNA-binding protein 1 (ZBP1; also known as DAI or DLM-1) regulates cell death and inflammation by sensing left-handed double-helical nucleic acids, including Z-RNA and Z-DNA. However, the physiological conditions that generate Z-form nucleic acids (Z-NAs) and activate ZBP1-dependent signaling pathways remain largely elusive. In this study, we developed a probe, Zα-mFc, that specifically detected both Z-DNA and Z-RNA. Utilizing this probe, we discovered that inhibiting spliceosome causes nuclear accumulation of Z-RNA:DNA hybrids, which are sensed by ZBP1 via its Zα domains, triggering apoptosis and necroptosis in mammalian cells. Furthermore, we solved crystal structures of the human or mouse Zα1 domain complexed with a 6-bp RNA:DNA hybrid, revealing that the RNA:DNA hybrid adopts a left-handed conformation. Our findings demonstrate that the spliceosome acts as a checkpoint preventing accumulation of Z-RNA:DNA hybrids, which potentially function as endogenous ligands activating ZBP1-dependent cell death pathways.
研究领域:
分子生物学
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免疫学
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细胞生物学
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产品关联
DOI
PubMed
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2021
·Vol. 128
·期 1
·1-14
·
IF 2.584
Chen Peng,Wu Keliang,Peng Xiang,Ma Yue,Yang Xuqi,Duan Xinping,Ma Yan,Liu Zhiyong
Hydrogen and oxygen production based on photocatalytic monolithic water splitting is considered to be one of the effective ways to produce sustainable and clean energy. The key challenge in this process is to develop new photocatalysts that can simultaneously produce H 2 and O 2 at a stoichiometric ratio of 2:1 without the use of any sacrificial agents. In order to solve this problem, highly efficient and ingenious photosystems in nature have been studied intensively. Herein, we prepared printable Z-type composite photocatalysts CdS@TiO 2 /Pt/ITO/WO 3 /Co 3 O 4 mimicking biological vegetative leaves in nature and constructed an “artificial leaf” device that completely decomposes water. We use an electron solid penetrating transporter ITO, which can rapidly transfer photogenerated electrons and photogenerated holes and reduce the compound rate of photogenerated carriers. Thus, the efficiency of photocatalytic total water dissolution is enhanced. This photocatalyst was able to produce both H 2 and O 2 in water with an H 2 production rate of 75.93 μmol g −1 h −1 and an O 2 production rate of 36.49 μmol g −1 h −1 . We designed the oxygen-producing photocatalyst WO 3 /Co 3 O 4 , which produced oxygen at a rate of 159.21 μmol g −1 h −1 6 times higher than that of WO 3 alone. Furthermore, the morphology, composition, and microstructures of the photocatalyst were characterized by field-emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and nitrogen adsorption–desorption.
研究领域:
材料科学
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化学工程
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环境科学
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纳米技术
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
TETRAHEDRON
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2024
·
IF 2.1
Nan Wang,Yuanyuan Huang,Mengke Wang,Weichun Huang,You Zi
Herein, a new approach for the synthesis of ( Z )- N -alkenyl-2-pyridones from 2-pyridones and propiolates using phosphine catalysis under mild conditions is reported. This dual Z -diastereoselective and N -selective reaction demonstrates excellent selectivity, yielding sole ( Z )- N -alkenyl-2-pyridones. Furthermore, scale-up studies confirm its practical applicability, with consistent efficiencies observed.
研究领域:
有机化学
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合成化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Xiaoli Jin,Jian Cao,Huiqing Wang,Chade Lv,Haiquan Xie,Fengyun Su,Xin Li,Ruixue Sun,Shukui Shi,Mengfei Dang,Liqun Ye
Architecting Z-scheme heterojunction can restrain the recombination of photoinduced carriers to improve the photocatalytic performance. However, it still lacks high-efficiency catalysts for sustainable photoreduction of CO 2 . Herein, an Ag-bridged Z-scheme Bi 4 O 5 Br 2 /AgBr heterostructure is successfully developed, which enables room-temperature CO 2 reduction driven by solar energy. In this catalyst, the Ag mediator acts as a bridge to shuttle electrons between Bi 4 O 5 Br 2 and AgBr, separating the electron-hole pairs efficiently and maintaining the original strong reduction reaction. As a result, Z-scheme Bi 4 O 5 Br 2 /AgBr heterostructures show obviously promoted performance of photocatalytic CO 2 reduction in contrast with pristine Bi 4 O 5 Br 2 , delivering a high CO 2 conversion activity of 6.6 and 1.8 μmol g -1 h −1 for CO and CH 4 products, respectively. This study reports an effective reference of Z-scheme Bi 4 O 5 Br 2 /AgBr heterojunction for satisfactory photocatalytic solar energy conversion and synthesis of high value-added products from CO 2 .
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Hongrui Zhu,Chun Zhang,Kefeng Xie,Xingang Li,Guangfu Liao
Defect engineering, exposed crystal facets, and Z-scheme mechanism are promising strategies to greatly promote photocatalytic performance. Herein, the ZnFe 2 O 4 (ZFO) with Ag-doping, oxygen vacancies and different exposed crystal facets was firstly prepared by a facile hydrothermal strategy. Subsequently, the MoS 2 flowers were in-situ grown on the surface of the prepared Ag-doping ZFO (Ag-ZFO) for fabricating MoS 2 /Ag-ZFO Z-scheme heterojunction by hydrothermal strategy. Due to the synergistic effects of defect engineering (Ag-doping and oxygen vacancies), exposed crystal facets, and Z-scheme mechanism, the photocatalytic activity for tetracycline degradation was evidently improved. More importantly, the prepared MoS 2 /Ag-ZFO (T) also show excellent photocatalytic performance under real environment water. This work offers a new insight for future design and development of highly active photocatalysts.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
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2022
·
IF 9.231
Cong Chen,Fei Yu,Xinli Wen,Shuna Chen,Kaixi Wang,Feiquan Wang,Jianming Zhang,Yuanyuan Wu,Puming He,Youying Tu,Bo Li
Two major green leaf volatiles (GLVs) in tea that contribute greatly to tea aroma, particularly the green odor, are (E)-2-hexenal and (Z)-3-hexenal. Until now, their formation and related mechanisms during tea manufacture have remained unclear. Our data showed that the contents of (E)-2-hexenal and (Z)-3-hexenal increased more than 1000-fold after live tea leaves were torn. Subsequently, a new (Z)-3:(E)-2-hexenal isomerase (CsHI) was identified in Camellia sinensis . CsHI irreversibly catalyzed the conversion of (Z)-3-hexenal to (E)-2-hexenal . Abiotic stresses including low temperature, dehydration, and mechanical wounding, did not influence the (E)-2-hexenal content in intact tea leaves during withering, but regulated the proportions of (Z)-3-hexenal and (E)-2-hexenal in torn leaves by modulating CsHI at the transcript level. For the first time, this work reveals the formation of (E)-2-hexenal during tea processing and suggests that CsHI may play a pivotal role in tea flavor development as well as in plant defense against abiotic stresses.
研究领域:
植物学
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食品科学
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分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Tingting Ji,Yuye Yan,Jianxiang Wang,Yingxia Zong,Ruiyang Zhao,Dong Yao,Jishu Han,Lei Wang
Climate change and natural disasters have stimulated the exploration of renewable energy, photocatalytic hydrogen production utilizing solar energy is considered an effective way. In this study, hollow FeNi 2 -MIL-88 nanorods were synthesized by the hydrothermal method, and then FeNi 2 P was obtained by gas phase phosphorization. Finally, SnIn 4 S 8 was utilized to coat the surface of FeNi 2 P through an in-situ growth method to obtain rod-like SnIn 4 S 8 /FeNi 2 P. The results showed that the hydrogen production of SnIn 4 S 8 /FeNi 2 P reached 18083.93 μmol/g within 3 h. And SnIn 4 S 8 /FeNi 2 P showed good stability. The photocurrent response spectra and electrochemical impedance spectra confirmed that SnIn 4 S 8 /FeNi 2 P had good carrier conductivity and effectively inhibited the reorganization of photogenerated carriers. The modification of SnIn 4 S 8 enabled the construction of a Z-scheme heterojunction between SnIn 4 S 8 and FeNi 2 P. It provided more active sites and promoted the separation of photogenerated carriers, ultimately improving the hydrogen production performance of the SnIn 4 S 8 /FeNi 2 P photocatalyst. It would offer essential insights into the design and development of efficient MOFs-derived photocatalysts.
研究领域:
材料科学
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可再生能源
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Xiaojing Yu,Haoran Qiu,Zhe Wang,Bin Wang,Qingnan Meng,Shaodong Sun,Yufei Tang,Kang Zhao
Aiming at comparing the charge separation efficiencies of various heterojunctions, such as p-n junction, metal–semiconductor junction, Z-scheme junction, TiO 2 -Au, TiO 2 -BiOI, TiO 2 -BiOI-Au and TiO 2 -Au-BiOI were synthesized by using n-type TiO 2 , p-type BiOI and plasmon metal Au as components for photocatalytic nitrogen fixation. The as-prepared “Z-scheme” TiO 2 -Au-BiOI photocatalyst showed the highest photocatalytic performance for N 2 photofixation with 543.53 μmol L −1 h −1 g −1 in the pure water system, which is 1.68 times higher than that of TiO 2 -BiOI-Au nanocomposite, 1.85 times higher than that of TiO 2 -BiOI and 6.69 times higher than that of TiO 2 -Au, revealing superiority of the heterojunctions of TiO 2 -Au-BiOI in kinetics among these different heterostructured photocatalysts during the photocatalytic N 2 reduction process. Moreover, the as-prepared TiO 2 -Au-BiOI exhibited considerable performance under real natural environment, showing a promising potential in future application.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 32
·期 1
·015706
·
IF 3.551
Qiao Yin,Zhenzhen Cao,Zhiyuan Wang,Jiaming Zhai,Mingliang Li,Li Guan,Bingbing Fan,Wen Liu,Gang Shao,Hongliang Xu,Hailong Wang,Rui Zhang,Hongxia Lu
Photocatalytic degradation of pollutants has been proved to be an effective strategy for wastewater treatment. Herein, TiO2 nanoparticles were synthesized on a Ti3C2 matrix by in situ growth, forming Z-scheme TiO2@Ti3C2/Cd0.5Zn0.5S (TO/CZS) multilevel structured nanocomposites via one-step hydrothermal route. The effects of hydrothermal temperature and Cd0.5Zn0.5S content on microstructure and properties of composites were assessed. TO/CZS nanocomposites were probed into phase composition, morphological and optical properties with x-ray diffractometer, infrared radiation, scanning electron microscope and UV–vis reflective spectra. Following the hydrothermal reaction at 160 °C for 12 h, TiO2 nanoparticles of 30 nm in diameter were generated in situ on Ti3C2 lamina and Cd0.5Zn0.5S particles were evenly distributed on the Ti3C2 matrix. The photocatalytic activity of TO/CZS composites were evaluated, which found that degradation rate constant (k = 0.028 min−1) of TO/CZS-40 on Rhodamine B was 5.19 times that of pure TiO2 and 4.48 times that of Cd0.5Zn0.5S. Through anchoring Ti3C2 as an electron transition mediator and combination with TiO2 and Cd0.5Zn0.5S, the new Z-scheme between TiO2 oxidized by Ti3C2 and Cd0.5Zn0.5S establishes a multilevel structure of separating electron-hole pairs. This work demonstrates a valid way to control electrons and hole transfer directions efficiently through designing multilevel semiconductor structural designs.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）