ADVANCED FUNCTIONAL MATERIALS
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2024
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IF 18.5
Yingshen Lu,Danmin He,Xiang Yuan,Quanhe Yan,Xin Shu,Ziting Hu,Zifa Zhang,Zhuoyan Liu,Zuimin Jiang,Run Xu,Wenzhen Wang,Zhongquan Ma,Teng Chen,Haitao Xu,Fei Xu,Feng Hong,Hongwei Song
The realization of large-area high-quality perovskite thick films under an atmospheric environment without humidity control is confronting an urgent challenge for the applications in X-ray detection and imaging. A spray-coating method with air as the gas carrier is employed to achieve large-area perovskite thick films for X-ray flat-panel detection applications. To further improve the quality of the thick films, the 10 µm-thick CsPbIBr 2 films with (100)-preferred orientation, low trap density (7.1 × 10 12 cm −3 ) and high resistivity corresponding to low dark current (3.2 × 10 −9 A) are prepared via dual-additive-assisted (NH 4 SCN and L-α-phosphatidylcholine (LP)) solution strategy under atmospheric environment with relative humidity of 60% (60% RH). Thus, the metal-semiconductor-metal-structured (Au/CsPbIBr 2 /Au) transverse X-ray detection device under 40 KeV X-ray irradiation possesses a high sensitivity up to 1420 µC Gy air −1 cm −2 under a weak electric field of 18 V mm −1 and a low dose rate of 3.3 µGy air s −1 that is lower than a dose rate of ≈5.5 µGy air s −1 required for routine medical diagnosis. Strikingly, the unencapsulated device maintains 80% (1120 µC Gy air −1 cm −2 ) of the original sensitivity after 1000 h under the atmospheric environment with 45–55% RH. These results pave the way for the practical applications of perovskite thick films in X-ray medical detection and imaging.
研究领域:
材料科学
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医学成像
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半导体物理
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产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Wulve Fan,Zhiliang Zhu,Hua Zhang,Yanling Qiu,Daqiang Yin
Triphenyl phosphate (TPhP) and transition metal elements have been ubiquitously detected in the atmosphere, which can participate in atmospheric chemical reactions and induce damage to human health. Currently the understanding of TPhP degradation, transformation and cytotoxicity on atmospheric particles surface are still limited. Therefore, this study used laboratory simulation methods to investigate the influence of irradiation time, transition metal salts, relative humidity (RH) to TPhP degradation, transformation and relative cytotoxicity. TPhP was coated on particle surfaces of four transition metal salts (MnSO 4 , CuSO 4 , FeSO 4 and Fe 2 (SO 4 ) 3 ) in the experiment. Within 12 h irradiation, the significant TPhP photodegradation can be observed on all particles surface. Among these influence factors, the irradiation and RH were the crucial aspects to TPhP degradation, which primarily affect the OH concentration in the atmosphere. The transition metal elements only exhibited slightly catalytic effect to TPhP degradation. The mechanism study indicated that the major degradation products of TPhP are diphenyl hydrogen phosphate (DPhP) and OH-DPhP, which originated from the phenoxy bond cleavage and hydroxylation of TPhP induced by OH. As for the cytotoxicity to A549 cells, all the transition metal particles coated with TPhP can cause cellular injury, which was chiefly induced by the transition metal salt. The possible cytotoxicity mechanism of these particles to A549 cells can be attributed to the excessive reactive oxygen species (ROS) production. This study may provide a further understanding of TPhP degradation and related cytotoxicity with the coexistent transition metal salts in the atmosphere.
研究领域:
环境科学
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毒理学
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产品关联
DOI
PubMed
高影响因子
CATALYSIS LETTERS
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2023
·
IF 2.8
Tang Mingqiang,Chen Weijie,Liu Zewei,Pang Jun,Li Chaoping,Liu Sijie,Tan Rong
Poor light absorption ability severely limit the photocatalytic efficiency of metal–organic frameworks (MOFs) for chemical transformations. Herein, we have integrated the zinc(terpyridine) complex as “molecular antennas” into backbone of MOFs, to harvest visible light for aerobic oxidative coupling of amines. Two photoactive MOFs of Zn-CTP [CTP = (4′-(4-carboxyl)-terpyridine] and Zn-TPBA {TPBA = 4-([2,2′:6′,2′′-terpyridin]-4'-yl)benzoic acid} were thus prepared by employing the terpyridine-containing aromatic carboxylate ligands of CTP and TPBA as the organic linkers, respectively, to coordinate with zinc nitrate under solvothermal condition. Characterization results suggested the successful chelation of terpyridine with zinc(II) ions, giving zinc(terpyridine)-containing MOFs with high crystallinity. The incorporated zinc(terpyridine) complexes indeed acted as the “molecular antennas” in MOF to harvest visible light. Furthermore, π-conjugated terpyridine in organic linkers favored the charge transfer, leading to efficient charge separation in MOFs. Both zinc(terpyridine)-containing MOFs thus demonstrated high activities in the visible light-driven oxidation of amines to imines in air at room temperature. Particularly, extended π-conjugated linker of TPBA could further enhance the delocalization of conjugated electrons and optimize the electronic band structure that in favour of photocatalytic activity. As a result, Zn-TPBA enables almost quantitative oxidative coupling of benzylamine under visible light irradiation in atmospheric air, which was even more efficient than other reported photocatalysts in pure oxygen atmosphere. The salient advantages, such as operational simplicity, environmentally friendly, energy efficient, and high efficiency, made such photocatalytic system highly promising and practical in industrial application. Graphical Abstract Zinc(terpyridine) complex acted as “light antennas” in MOFs, making oxidative coupling of amines highly efficient under visible light in air.
研究领域:
材料科学
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化学
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催化
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光化学
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
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2023
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IF 4.6
Luping Zhang,Xuewei Tu,Yutong Chen,Weihang Han,Liangchen Chen,Can Sun,Shouxin Zhu,Yanjiang Song,Hui Zheng
Photocatalytic cycloaddition of CO 2 with epoxides to produce cyclic carbonate is a hot research topic for achieving carbon neutrality. In this work, a catalyst (CoFe 2 O 4 @TPA) with bimetallic oxides doped with organic ligands was synthesized, which could efficiently fix CO 2 to synthesize cyclic carbonate in solvent-free and atmospheric environment by photothermal catalysis. Various characterization results suggest that the catalyst exhibited efficient photocatalytic performance upon the addition of organic ligands (TPA). This pathway of using photocatalytic catalytic reactions under simple conditions provides a new idea for the synthesis of valuable compounds from fixed CO 2 .
研究领域:
环境科学
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催化
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材料科学
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化学工程
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产品关联
DOI
高影响因子
ANTI-CORROSION METHODS AND MATERIALS
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2020
·Vol. 67
·期 3
·295-304
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IF 1.196
Hao Zhou,Kai Zhang,Lin Zhang,Jiamin Lu,Jin Li,Daquan Zhang,Lixin Gao
Purpose The authors have prepared the triazole film on copper surface by click reaction and explored its inhibition mechanism. Design/methodology/approach The protective film is assembled by immersing bronze in solution containing p -toluenesulfonyl azide (TA) and propiolic acid (PA). Findings Fourier transform infrared spectroscopy (FT-IR) indicates that triazole (TTP) film was formed on bronze surface via click chemistry reaction between TA and PA. It shows TTP film has a good protection for bronze in the atmospheric environment simulation solution. Quantum chemical calculation (QC) and molecule dynamics simulation suggests TTP molecule adsorbs on bronze surface via N and O. Originality/value This is beneficial to develop the corrosion inhibitors for the corroded copper alloys.
研究领域:
材料科学
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腐蚀防护
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表面化学
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文化遗产保护
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）