JOURNAL OF CHROMATOGRAPHY A
·
2023
·
IF 4.1
Zhentao Li,Zhengzheng Liao,Xiaoru Ding,Jinfang Hu,Zilin Chen
Herein, a spherical covalent organic framework COF TAPB-DMTP was facilely synthesized from 2,5-dimethoxyterephthalaldehyde (DMTP) and 1,3,5-tri-(4-aminophenyl)benzene (TAPB) as monomers. COF TAPB-DMTP with regular mesoporous and excellent mass transfer ability was first introduced into the capillary and immobilized on the inner wall of the capillary through a simple in situ growth method. Through various characterization results, COF TAPB-DMTP was successfully prepared and modified onto the capillary inner wall. The separation performance and potential of COF TAPB-DMTP modified capillary column was explored. The new developed COF modified column achieved a highly efficiency and selective separation between analytes with different properties, including halogeno benzenes, alkylbenzenes, phenols and sulfonamides. Satisfactory stability and reproducibility were observed on COF TAPB-DMTP modified columns. The intraday, interday and three batch columns relative standard deviations were all less than 1.85 % for the retention time. The separation performance of prepared column has no significant change after 90 continuous runs. Additionally, the COF TAPB-DMTP modified capillary column was successfully used for separation and detection of triazole antifungal drugs in human plasma, and the recoveries of three antifungal drugs (fluconazole, isavuconazole and posaconazole) in spiked samples were in the range of 98.6–100.8 %, 92.4–102.1 % and 99.9–107.5 %, respectively. This self-made column showed excellent application potential in chromatography separation science.
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高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 18
·185402
·
IF 3.874
Bingquan Han,Lei Zhang,Yuwei Cao,Benyi Li,Zhiyuan Liu,Lingbo Xu,Peng Wang,Ping Lin,Xiaoping Wu,Can Cui
CsPbI3 inorganic perovskites with ideal bandgap and much enhanced thermal stability compared with organic−inorganic hybrid perovskites, have attracted much interest in the field of solar cells. The performances of solar cells highly depend on the quality of perovskite films, yet the research on fabrication methods of inorganic perovskites is far below that of organic–inorganic hybrid counterparts. Antisolvent engineering is a widely used method in controlling the morphology and crystallinity of organic–inorganic hybrid perovskites. Its effect varies with parameters such as the physicochemical properties of antisolvents and the compositions of perovskite precursors. Specially, there lacks a comprehensive study comparing different antisolvents used in low-temperature processed CsPbI3 from dimethylammonium-based precursors. In this work, we used three different antisolvents to control the growth of CsPbI3 films in a low-temperature (<200 °C) processed procedure and systematically compared the properties of resultant films. The green antisolvent ethyl acetate (EA) engineered CsPbI3 films exhibit improved morphology and crystallinity as well as reduced defects, compared with the counterparts processed without antisolvent or those with widely employed toxic antisolvents toluene and chlorobenzene. The EA antisolvent engineering results in efficient CsPbI3 perovskite solar cells with a champion power conversion efficiency of 8.8%. Our work thus provides a green and viable way to prepare high quality CsPbI3 perovskite films for optoelectronic applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Shuang Zhou,Qiying Wang,Zhendong Xu,Shenke Xu,Peiyi Yang,Hao Deng,Bobo Li,Yifan Dong,Peigang Han,Yaorong Su
Exploring high performance photocatalysts is of great importance to relieve the environment pollution issues. In this paper, we introduce a facile antisolvent solvothermal method to synthesize methylammonium lead tribromide perovskite (MAPbBr 3 ) nanocrystals and successfully employ them as efficient photocatalysts. Compared to the room temperature synthesized MAPbBr 3 (RT-MAPbBr 3 ), the antisolvent solvothermal synthesized MAPbBr 3 (AS-MAPbBr 3 ) has multiple outstanding properties, such as improved crystallinity with lower grain boundary density, enhanced light absorption in visible range, suitable band gap of 2.31 eV and extended photoluminescence (PL) lifetime as long as 2627.82 ns. By taking advantages of the above merits, the AS-MAPbBr 3 exhibits efficient photocatalytic performance by decomposition of methyl orange under solar light. A high apparent rate constant of 101.2 × 10 −3 is achieved along with excellent cyclability, which significantly outperforms the RT-MAPbBr 3 (56.0 × 10 −3 ) and P25 (16.5 × 10 −3 ). The underlying mechanism for MO photocatalytic degradation is deeply explored and proposed. Our present study suggests that the antisolvent solvothermal method can be a promising method to synthesize perovskite nanocrystals, and might also provide some insights in developing a series of high performance perovskite based photocatalysts.
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ELECTROCHEMISTRY COMMUNICATIONS
·
2021
·
IF 4.724
Qi Chen,Jihuai Wu,Xiaobing Wang,Yuqian Yang,Yitian Du,Ziruo Li,Xinpeng Zhang,Zeyu Zhang,Weichun Pan,Weihai Sun
Hole transport layer is one of the primary factors that improve the optical-electric properties of perovskite solar cells. Spiro-OMeTAD is frequently utilized as hole transport materials in PSCs. However, pristine or oxygen oxidized spiro-OMeTAD has low mobility and conductivity. Herein, cumene hydroperoxide is introduced to accelerate the oxidation of spiro-OMeTAD, which improves the carrier mobility, declines the trap-state density and optimizes the energy match with perovskite layer, leading to the enhancement of the performance of device. Kelvin probe force microscopy images and Atomic force microscopy images show the improvement of interface morphology. Multiple electrochemical characterizations demonstrate the acceleration of spiro-OMeTAD oxidation, the enhancement of conductivity of the doped hole transport material, and the decline of trap-state density and carrier annihilation in hole transport layer/perovskite interface after the modification. The perovskite solar cell doped with optimal concentration acquires a power conversion efficiency of 20.33%, while the undoped device gets an efficiency of 18.00%.
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TALANTA
·
2021
·
IF 6.057
Wenqi Sun,Yikun Liu,Wei Zhou,Zhentao Li,Zilin Chen
Column technology is an important part in capillary electrochromatographic science. Developing novel stationary phase with high separation efficiency and high loading capacity is an essential work. In this work, a novel spherical vinyl-functionalized covalent-organic framework (COF–V) was synthesized at room temperature and firstly employed as stationary phase for CEC-MS analysis. The COF–V based CEC column was characterized by scanning electron microscopy, X-ray diffraction and Fourier transform infrared spectroscopy. The results proved the successful modification of COF–V. The COF–V based column possesses the advantages like strong electroosmotic flow , high separation efficiency and high loading capacity. The CEC column showed powerful separation selectivity to several kinds of compounds, and the highest column efficiency (theoretical plates, N) was over 1.4 × 10 5 plates·m −1 for methylbenzene . Besides, the COF–V modified column exhibited excellent repeatability and stability. The relative standard deviations (RSDs) of retention times for intra-day (n = 5), inter-day (n = 3) runs and column-to-column (n = 3) were all less than 2.1%. Hence, the COF–V modified column was successfully applied in CEC-MS for determination of antiepileptic drug , triazine herbicides and active ingredients in traditional Chinese medicine.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Tao Wang,Sumin Hou,Huafang Zhang,Yi Yang,Wen Xu,Tianyong Ao,Miao Kang,Gencai Pan,Yanli Mao
Low-dimensional organic-inorganic hybrid perovskite materials have attracted much attention in photoelectric devices due to their exotic performance in optoelectronics compared with their bulk and thin-film counterparts. In this article, using a simple ligand-assisted deposition method, we successfully synthesized uniform methylammonium lead iodide (MAPbI 3 ) perovskite nanorods, nanotriangles and nanocubes, and investigated their photoelectric properties after fabricated into photodetectors (PDs) on SiO 2 /Si substrates. It is found that the synthesized MAPbI 3 nanorods not only have extremely small optical band gap (minimum of ~1.36 eV), but also have long photoluminescence (PL) lifetime (longest of ~7.81 μs) and high absolute PL quantum yields (maximum of ~ 45%), and the PL lifetime is more than about one order of magnitude higher than that the reported previously. The PDs based on MAPbI 3 nanorods presented a wide spectral response “window” from 350 to at least 950 nm, and exhibited a photoresponsivity of 12.2 mA/W, a detectivity of 2.67 × 10 11 Jones, the on/off ratio of more than 800, the rise/decay time constants of 18/25 ms, under the excitation at 405 nm. Further analysis suggests that the dramatically improved photo-electric conversion properties of the nanorods PDs could be closely related with their morphology dependent properties, including bandgap, PL lifetime, trap density (n trap ) and carrier concentration. These results provide a simple and effective method for preparing different morphology low-dimensional MAPbI 3 , and discuss the mechanism of morphology-dependent photoelectric performance of PDs, which is of great significance for potential applications in the field of photoelectronic devices.
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Energy Storage Materials
·
2021
·
IF 17.789
Gaozhan Liu,Jiamin Shi,Mengting Zhu,Wei Weng,Lin Shen,Jing Yang,Xiayin Yao
All-solid-state lithium batteries with high safety and high energy density are one of the most promising next generation energy storage devices. However, the enhancement of energy density of all-solid-state lithium batteries is generally hindered by the thick and heavy solid electrolyte layer. In this work, a 5 nm thick homogeneous polydopamine layer is coated on the Li 6 PS 5 Cl electrolyte particles in organic alkali solution, resulting in a modified adhesive particle surface. Free-standing polydopamine-coated Li 6 PS 5 Cl thin film with thickness of 35 μm could be achieved by cold pressing. All-solid-state lithium battery with the polydopamine-coated Li 6 PS 5 Cl thin film is assembled and exhibits a discharge capacity of 485.1 mAh g −1 after 100 cycles with a capacity retention of 78.5% at 0.1 C and 25 °C. A high full-cell level energy density of 284.4 Wh kg −1 can be realized with reduced thickness and weight of electrolyte layer.
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Nanomaterials
·
2021
·Vol. 11
·期 2
·405
·
IF 5.076
Daocheng Hong,Mingyi Xie,Yuxi Tian
Solution-processed organometal halide perovskites (OMHPs) have been widely used in optoelectronic devices, and have exhibited brilliant performance. One of their generally recognized advantages is their easy fabrication procedure. However, such a procedure also brings uncertainty about the opto-electric properties of the final samples and devices, including morphology, stability, coverage ratio, and defect concentration. Normally, one needs to find a balanced condition, because there is a competitive relation between these parameters. In this work, we fabricated CH3NH3PbI3films by carefully changing the ratio of the PbI2to CH3NH3I, and found that the stoichiometric and solvent engineering not only determined the photoluminescence efficiency and defects in the materials, but also affected the photostability, morphology, and coverage ratio. Combining solvent engineering and the substitution of PbI2by Pb(Ac)2, we obtained an optimized fabrication condition, providing uniform CH3NH3PbI3films with both high photoluminescence efficiency and high photostability under either I-rich or Pb-rich conditions. These results provide an optimized fabrication procedure for CH3NH3PbI3and other OMHP films, which is crucial for the performance of perovskite-based solar cells and light emitting devices.Keywords:CH3NH3PbI3;stoichiometric modification;morphology;photostability;solvent engineering
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MOLECULES
·
2021
·Vol. 26
·期 11
·3398
·
IF 4.412
Yi Long,Kun Liu,Yongli Zhang,Wenzhe Li
Inorganic cesium lead halide perovskites, as alternative light absorbers for organic–inorganic hybrid perovskite solar cells, have attracted more and more attention due to their superb thermal stability for photovoltaic applications. However, the humid air instability of CsPbI2Br perovskite solar cells (PSCs) hinders their further development. The optoelectronic properties of CsPbI2Br films are closely related to the quality of films, so preparing high-quality perovskite films is crucial for fabricating high-performance PSCs. For the first time, we demonstrate that the regulation of ambient temperature of the dry air in the glovebox is able to control the growth of CsPbI2Br crystals and further optimize the morphology of CsPbI2Br film. Through controlling the ambient air temperature assisted crystallization, high-quality CsPbI2Br films are obtained, with advantages such as larger crystalline grains, negligible crystal boundaries, absence of pinholes, lower defect density, and faster carrier mobility. Accordingly, the PSCs based on as-prepared CsPbI2Br film achieve a power conversion efficiency of 15.5% (the maximum stabilized power output of 15.02%). Moreover, the optimized CsPbI2Br films show excellent robustness against moisture and oxygen and maintain the photovoltaic dark phase after 3 h aging in an air atmosphere at room temperature and 35% relative humidity (R.H.). In comparison, the pristine films are completely converted to the yellow phase in 1.5 h.Keywords:CsPbI2Br;perovskite solar cells;ambient air temperature assisted crystallization;film quality;photophysical properties
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Journal of Inorganic and Organometallic Polymers and Materials
·
2021
·Vol. 31
·期 11
·4260-4271
·
IF 3.543
Zhang Xuan,Wang Tongfei,Li Songjun,Shen Xiaojuan
Abstract In this article, a novel silicon-based electrode was designed with the facile solution methods. With the modification of highly conductive PEDOT:PSS layer on the SiNWs by the spin-coated method (SiNWs-PSS), three-dimensional (3D) porous network polyaniline nanofibers (PANI) film was uniformly electrodeposited on the silicon surface (SiNWs-PSS@PANI). The sheet resistances of the PEDOT:PSS layer with different surfactants as well as the deposition time of the PANI were investigated. After optimization, the fabricated SiNWs-PSS@PANI electrode displayed high capacitance about 301.71 mF cm −2 at the current density of 1 mA cm −2 , which enhanced ~ 29 fold comparing to 10.18 mF cm −2 of electrode without the PEDOT:PSS layer between the SiNWs and PANI (SiNWs@PANI), outperforming most values of the reported silicon-based electrodes. The electrode designed in this paper provides a new idea to fabricate high-performance of silicon-based micro-supercapacitors with the simple and low-temperature method. Graphic Abstract
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Nanomaterials
·
2021
·Vol. 11
·期 11
·2844
·
IF 5.076
Zheng Lu,Hu Zhou,Chao Ye,Shi Chen,Jinyan Ning,Mohammad Abdul Halim,Sardor Burkhanovich Donaev,Shenghao Wang
Iron pyrite is a cheap, stable, non-toxic, and earth-abundant material that has great potential in the field of photovoltaics. Electrochemical deposition is a low-cost method, which is also suitable for large-scale preparation of iron pyrite solar cells. In this work, we prepared iron pyrite films by electrochemical deposition with thiourea and explored the effect of sulfurization on the synthesis of high-quality iron pyrite films. Upon sulfurization, the amorphous precursor film becomes crystallized iron pyrite film. Optical and electrical characterization show that its band gap is 0.89 eV, and it is an n type semiconductor with a carrier concentration of 3.01 × 1019cm−3. The corresponding photovoltaic device shows light response. This work suggests that sulfurization is essential in the electrochemical preparation for fabricating pure iron pyrite films, and therefore for low-cost and large-scale production of iron pyrite solar cells.Keywords:iron pyrite;electrochemical deposition;thiourea;sulfurization
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高影响因子
SOLAR ENERGY
·
2021
·
IF 5.742
Sike Yang,Wenbo Ma,Zhenlong Zhang,Jichun Zhu,Yuefeng Liu,Huafang Zhang,Yanli Mao
In this paper, CuInS 2 nanocrystals were prepared and used to fabricate inverted perovskite solar cells (PSCs) with the CuInS 2 nanocrystals as a hole transport material (HTM). The average power conversion efficiency (PCE) of the PSCs with CuInS 2 is 16.22%, which is close to the average PCE of the NiO-based devices (17.32%). The PCE of the champion PSC with CuInS 2 has been reached 17.34%, and that of the control PSC with NiO (18.33%). Moreover the inverted PSCs with CuInS 2 present an enhanced stability compared with the NiO-based control devices. The PCE of the inverted PSCs based on CuInS 2 maintains 70% of the original when they are placed in ambient atmosphere for 96 h, while the PCE of the control devices with NiO decreased to 60% of the beginning. These results indicate that CuInS 2 nanocrystal is an excellent HTM which could be applied to assemble the inverted PSCs.
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