JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Yanping Wang,Kexin Li,Dezhen Fang,Xiushen Ye,Haining Liu,Xiaoli Tan,Quan Li,Jun Li,Zhijian Wu
A new composite adsorbent (AMP@MOF-76(Sm)) grafted ammonium molybdophosphate onto MOF-76(Sm) was synthesized via a solvothermal method and well-characterized by SEM-EDS, particle size analysis , N 2 adsorption-desorption isotherms, TG, FT-IR, XRD and XPS analysis . The adsorption behaviors of Rb + and Cs + on synthesized AMP@MOF-76(Sm) were investigated depending on the parameters of solution pH, ionic strength, contact time, ion concentration and temperature. The adsorbent can adsorb Rb + and Cs + from the solution when the solution pH ranged from 4.0 to 10.0 and the coexisted ion (Na + ) has little effect on the adsorption amounts of both Rb + and Cs + . The adsorption kinetic data fitted well with pseudo-second order kinetic models . The adsorption equilibrium of Rb + and Cs + on AMP@MOF-76(Sm) is better explained by the Langmuir isotherm model and the maximum adsorption amounts for Rb + and Cs + are 0.490 mmol g −1 and 0.434 mmol g −1 , respectively. Furthermore, the AMP@MOF-76(Sm) could be easily reused at least four times using 3.0 mmol L −1 ammonia nitrate as the eluent . The mechanism of the adsorption of Rb + and Cs + is proposed to be a combination of electrostatic attraction and ion exchange mechanism.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Nano Energy
·
2019
·
IF 15.548
Yudi Wang,Jialong Duan,Xiya Yang,Liqiang Liu,Leilei Zhao,Qunwei Tang
Inorganic cesium lead tri-bromine (CsPbBr 3 ) perovskite is a star material in modern optoelectronic and electronic nanodevices due to its fascinating optical and electronic properties and excellent stability in atmosphere. However, the unique dielectric behavior still remains to be exploited. Herein, inorganic CsPbBr 3 perovskite is introduced into triboelectric nanogenerators for the first time in view of its tremendous dielectric and electrical properties. Electron binding energy, dielectric properties and surface potentials are systematically optimized through doping Ba 2+ into CsPbBr 3 lattice to form CsPb 1-x Ba x Br 3 ( x = 0.01–0.13) perovskites. The output performances are significantly improved on account of enhanced space charge polarization and increased work function. An open-circuit voltage of 220 V, short-circuit current density of 22.8 mA m −2 and maximized power density of 3.07 W m −2 are registered by the champion CsPb 0.91 Ba 0.09 Br 3 based TENG with lighting up over 80 LED lights. Finally, impacts of temperature and relative humidity on the output performance of perovskite TENG are investigated, high durability and stability of the perovskite TENGs are presented indicating the remarkable reversibility and adaptability of all-inorganic CsPbBr 3 perovskites in TENG for mechanical energy harvesting .
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Zhihang Zhang,Wenjing Zhai,Guangyuan Li,Wenhao Zheng,Xinyu Li,Lin Huang,Liufang Chen,Lin Lin,Guoliang Yuan,Zhibo Yan,Jun-Ming Liu
Tin halide perovskites are rising as promising candidates for next-generation optoelectronic materials due to their good optoelectronic properties and relatively low toxicity. However, the high defect density and the easy oxidation of Sn2+ have limited their optoelectronic performance. Herein, we report the treatment of the FASnI3 (formamidinium tin, FA) perovskite film by a bifunctional cesium fluoride (CsF) additive, which improves the film quality and significantly enhances the photoelectric performance. The responsivity of the perovskite-based photodetector (PD) with an optimal CsF concentration of 15% is over 60 times larger than that of the PD without CsF. It indicates that both the Cs substitution and the fluoride anion additive from CsF inhibit the oxidation of Sn2+, optimize the crystal growth, and passivate the defects, demonstrating the dual roles of the CsF additive in improving the photoelectric performance. This work offers valuable insights into the additive selection for developing high-quality tin-based perovskite films and devices.
研究领域:
材料科学
·
光电子学
·
纳米技术
·
化学工程
✓ 已验证
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 30
·17653-17659
·
IF 3.119
Dingyan Xu,Qun Wan,Siyao Wu,Yu Zhao,Xinglei Xu,Liang Li,Gufeng He
Lead halide perovskites have been considered promising materials for optoelectronic applications owing to their superior properties. CsPbBr3 nanocrystals (NCs) with a narrow particle size distribution and a narrow emission spectrum are synthesized by ligand-assisted re-precipitation (LARP), a low-cost and facile process. In inverted CsPbBr3 NC LEDs, a dual hole injection layer (HIL) of 1,4,5,8,9,11-hexaazatriphenylene-hexacarbonitrile (HAT-CN)/MoO3 is introduced to enhance hole injection and transport, because HAT-CN can extract electrons easily from the hole transport layer and leave a large number of holes there. The current and power efficiencies of the optimized device with a dual HIL are 1.5- and 1.8-fold higher than those of the single HIL device. It is believed that the dual HAT-CN/MoO3 HIL effectively promotes hole injection and has promise for application in many other devices.
研究领域:
材料科学
·
光电技术
✓ 已验证
DOI
高影响因子
Laser & Photonics Reviews
·
2021
·Vol. 15
·期 10
·2100278
·
IF 13.138
Qionghua Mo,Chen Chen,Wensi Cai,Shuangyi Zhao,Dongdong Yan,Zhigang Zang
The photoluminescence quantum yield (PLQY) of CsPbBr 3 perovskite nanocrystals (NCs) prepared by the hot-injection method can exceed 90%, which have attracted intensive attention for white light-emitting diodes (WLEDs). However, the whole hot-injection experiment requires air isolation and relatively high temperature. In addition, the poor stability of CsPbBr 3 NCs impedes their applications. Here, a facile method is reported to synthesize CsPbBr 3 @ZrO 2 NCs at room temperature in air. Owing to using ZrO 2 coated CsPbBr 3 NCs, the prepared CsPbBr 3 @ZrO 2 NCs not only present a PLQY of 80% but also exhibit an enhanced stability to heat and moisture. Furthermore, WLEDs are fabricated with CsPbBr 3 @ZrO 2 NCs and commercial red phosphors (CaAlSiN 3 :Eu 2+ ) on blue LEDs chips. The fabricated WLEDs exhibit a correlated color temperature (CCT) of 4743 K and luminous efficacy as high as 64.0 Lm W –1 . In addition, visible light communication with a high data rate of 33.5 Mbps is achieved using the WLEDs. This work provides a room temperature strategy to coat zirconia for CsPbBr 3 @ZrO 2 NCs, benefiting to enhance the optical performance and stability, as well as the promotion of the great potentials in solid-state illuminating and visible light communication applications.
研究领域:
材料科学
·
光学工程
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2015
·
IF 3.368
Chunyan Sun,Feng Zhang,Jianfang Cao
The faujasite-Y confined ammonium molybdophosphate (AMP–Y) were successfully synthesized for the first time using ammonium molybdophosphate and natural clay from Qaidam Basin as starting materials. The final products were characterized by XRF, XRD, FTIR, 27 Al and 31 P MAS NMR, and N 2 adsorption/desorption, which indicated that Qaidam natural clay is a promising low-cost precursor for the production of zeolite Y support. Various loadings of ammonium molybdophosphate could be well encapsulated in the supercage of Y zeolite using a ‘build-bottle-around-ship’ method. The resultant composite materials were effective for the adsorption of cesium ion from solution.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2022
·Vol. 24
·期 45
·7962-7970
·
IF 3.756
Meng Li,Jingtao Xu,Yang Song,Feiyong Chen
Although various cations have been explored as a substitute for Pb2+ in CsPbX3 nanocrystals (NCs), there has been little research to study the influence of the doping methods on the doping results. Cu2+ is one such candidate as a transition metal with low toxicity, yet there are limited studies on Cu2+-doped CsPbX3 NCs, especially on the effect of the doping methods. Herein, Cu2+ was successfully doped into CsPbBr3 NCs with the replacement of Pb2+via a hot-injection method and postsynthetic cation-exchange reaction. Using the hot-injection method, the introduction of additional Cu2+ promoted the formation of CsPbBr3 nanoplates with a uniform thickness. The size of the CsPbBr3 nanoplates increased with the increase in the temperature. Differently, using the postsynthetic cation-exchange reaction, doping moderate Cu2+ ions into CsPbBr3 NCs evidently improved the PLQY, prolonged the PL lifetime, and decreased the non-radiative decay, resulting from an effective passivation of the surface defects on CsPbBr3 NCs. The different effect of Cu2+ was the outcome of how the CuBr2 interacted with the CsPbBr3 NCs in the different protocols. Our results should promote further research on the substitution of Pb2+ with other cations, providing effective protocols to prepare low-dimensional CsPbBr3 nanoplates with a uniform thickness and easily controlled lateral size, and can achieve an enhancement of the PLQY of CsPbBr3 NCs, which will benefit the further development of CsPbX3 in optoelectronic and other fields.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Ran Ran,Hanwen Yan,Guoliang Zhang,Zengxi Li,Gang Wang,Gongying Wang,Weiguang Su,Chunshan Li
Supported Cs-based catalysts are considered as potential candidates for methyl methacrylate (MMA) synthesis via one-step aldol condensation, but they suffer from low activity. In this paper, the acid–base properties of the Cs/SiO2 catalyst were modulated by loading different amounts of the Al element. The changes in structural and physicochemical properties following Al introduction were revealed by a series of characterizations. In-depth investigation of the catalytic mechanism through in situ DRIFT combined with DFT calculations unveiled the synergistic effects between the Al and Cs components on the promotion of catalytic performance. The results showed that the presence of Al species facilitated the formation of weak and medium acid and base sites, along with the dispersion of the active Cs component, leading to an improvement of MMA yield. Additionally, the kinetic studies indicated that the addition of Al efficiently reduced the activation energy in comparison to pristine Cs/SiO2.
研究领域:
化学工程
·
催化科学
✓ 已验证
DOI
高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2014
·Vol. 113
·期 2
·605-614
·
IF 0.983
Liu Hong,Yang Guohai
Gas-phase transformation of toluene is carried out on Cs-exchanged NaY zeolite in a fixed-bed tubular reactor and it is observed that toluene can transform through dealkylation, producing benzene and a small amount of hydrogen under the experimental conditions. After a definite activation period, the transformation of toluene can achieve its steady state with the yield of benzene above 25 % for a relatively long continuous time at low space velocity. Combining the results of characterization and catalytic performances, it can be concluded that benzene is the steadiest product except the carbonaceous residues within the CsY zeolite pores. The in situ carbonaceous deposition experiment shows a similar trend of the carbonaceous forming process and the yield of benzene, indicating the important role of carbonaceous species in the formation of benzene, i.e., it is necessary for the accumulation of carbonaceous species in the initial stage of reaction. The discovery in the current work sheds light on new strategies for the transformation of other similar compounds.
研究领域:
催化化学
·
材料化学
·
物理化学
·
能源化学
·
工业催化
✓ 已验证
DOI
高影响因子
Nanoscale
·
2022
·Vol. 14
·期 42
·15691-15700
·
IF 8.307
Shixun Wang,Ran Shi,Bing Tang,Yuan Xiong,Arsenii Portniagin,Xin Zhao,Stephen V. Kershaw,Run Long,Andrey L. Rogach
The co-doping of double perovskites is a useful approach in terms of improving their stability and photoluminescence quantum yield. Herein, Bi3+ and Te4+ cations have been co-doped into Cs2AgInCl6 nanocrystals. Doping with Te4+ cations promotes radiative recombination of self-trapped excitons due to increased defect formation energies of silver and indium vacancies, according to experimental and theoretical results. When used in excess, the TeO2 precursor would generate residual TeO2, Te2O3Cl2, R2TeO, or all three of them, which confined undesired chlorine ions on oxygen vacancies to counteract the pull from the Cs2AgInCl6 host, resulting in improved coordination with surface oleic acid ligands. As a result, 1% Bi and 8% Te co-doped Cs2AgInCl6 nanocrystals reach a high photoluminescence quantum yield of 34% and show an improved stability, maintaining over 70% of their original emission intensity after storage for more than 1 month. These findings are important in the context of producing high-performance properly doped double perovskite nanocrystals for optoelectronic applications.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Kun Bai,Ruosheng Zeng,Bao Ke,Sheng Cao,Xiaogang Xue,Rihui Tan,Bingsuo Zou
Doping has been established as a powerful approach for endowing novel properties to perovskite nanocrystals (NCs).However, the fast formation of perovskites makes the fundamental understanding of doping processes in these NCs very rare. In the present work, a mild temperature (<100 °C) approach to produce Mn 2+ doped CsPbCl 3 (Mn:CsPbCl 3 ) perovskite NCs in toluene is reported. The effects of the introduced Mn/Pb ratios in the raw materials as well as the temperature on the structure and photoluminescence (PL) properties of Mn:CsPbCl 3 NCs were investigated systematically. The as-synthesized Mn:CsPbCl 3 NCs shown a strong Mn 2+ emission at 594 nm with a PL quantum yield (QY) of 52%, and the doping concentrations can be easily tailored from 1.8 atom % to 13.3 atom % by changed the Mn/Pb feed ratios. The study revealed that the reaction temperature plays a key role in Mn:CsPbCl 3 NCs. Through elemental and microstructure characterization , it was surprisingly found that lattice ejection of Mn ions occurred at 100 °C. This result greatly enhances the understanding of the “basic process” of Mn 2+ doping in CsPbCl 3 NCs, which provides some insights into the preparation of metal ion doped perovskite NCs.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Jianing Cheng,Yanan Li,Wei Qu,Min Sun,Yiwen Liu,Wangzhou Shi,Weijie Du,Yiwen Zhang
Mn-doped CsPbCl 3 nanocrystals are considered to be a promising material for luminescence and display applications owing to Mn doping provides a way to introduce new optical properties and reduce the use of toxic Pb. Complicate ion-exchange and hot-injection are commonly used for the fabrication of the nanocrystals. Developing a fast and efficient synthesis method remains a challenge so far. Herein, we developed a simplified solid-state mechanochemical approach to synthesize Mn-doped CsPbCl 3 nanocrystals and investigated the structure and luminescence properties of the as-synthesized nanocrystals. Cubic morphology of Mn-doped CsPbCl 3 nanocrystals with average size of 13 nm have been obtained by this approach. Mn was successfully incorporated in CsPbCl 3 perovskite nanocrystals , resulting in a high photoluminescence quantum yield of 40.7% with an improvement of stability. Emission peak of 594 nm that can be assigned to the luminescence of Mn 2+ d-d transition was observed under 365 nm UV excitation. The color of the luminescence changed from blue to warm white to yellow depended on the amount of Mn doping, exhibiting a tunable-color property. It is expected that this approach provides an effective route that would help for synthesis of perovskite nanocrystals doped with different dopants .
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）