ACS Applied Electronic Materials
·
2025
·
IF 4.7
Qingkun Kong,Xiaochen Wang,Wuyang Fan,Yangqing Wu,Xin Xu,Junsheng Chen
Metal halide perovskites (MHPs) with stimuli-responsive photoluminescence (PL) have attracted widespread attention for their application in optical encryption. However, existing metal halide perovskites typically exhibit a monochromatic PL emission and response to a single stimulus. As a result, they show limited encryption security. Therefore, it is crucial to develop a strategy to transition from single-stimulus responsive materials to multistimuli responsive ones. Herein, for the first time, we reported a strategy through cation alloying to form CsxRb2–xMnBr4(H2O)2 with multistimuli responsive PL. A continuous PL color change of CsxRb2–xMnBr4(H2O)2 was achieved from nonluminous, red and green light emissions with temperature, which is attributed to the chemical transformation from CsxRb2–xMnBr4(H2O)2 to Rb2MnBr4, RbMnBr3, Rb3MnBr5, and Cs3MnBr5. More importantly, Cs+ alloying can enable the chemical transformation from CsxRb2–xMnBr4(H2O)2 to RbMnBr3, Cs3MnBr5, and Rb3MnBr5 in isopropanol accompanied by PL change from red to green. Furthermore, such a chemical transformation of CsxRb2–xMnBr4(H2O)2 can also be triggered by water. These results highlight Cs alloying as a unique strategy to expand the multistimuli responsive PL modes of MHPs. Our findings present a straightforward approach for designing multistimuli responsive materials with potential applications in information storage, anticounterfeit labeling, and information security.
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高影响因子
LANGMUIR
·
2025
·
IF 3.9
Ruoyi Chen,Fuding Tan,Xiang Wang,Yuxin Hou,Ming Ouyang,Xingyun Guan,Peng Liu,Zuliang Wu,Shuiliang Yao,Steven L. Suib,Daiqi Ye
The transportation and transformation of biogenic isoprene are vital for the organic carbon cycle in the troposphere. As a typical mineral with high oxidation potential, Fe-substituted cryptomelane oxidizes the surface monolayer of isoprene into formic and acetic acids, and simultaneously, the Mn4+ ions in the structure are reduced to Mn3+ and Mn2+. The flow of H2O in isoprene decreases the adsorption and oxidation of isoprene significantly, even at low relative humidity (10%). As physisorbed H2O retains Fe-substituted cryptomelane’s crystal structure and oxidation ability, the adsorption and oxidation capacity recovers when H2O is absent in the isoprene flow. Theoretical calculations on (001) surfaces show that isoprene prefers to be adsorbed by the Fe3+ site and H2O tends to form hydrogen bonds. Due to the decrease in total adsorption energy of H2O and isoprene, Fe-substituted cryptomelane favors the adsorption of H2O in the flow of humid isoprene. The low oxidation performance at ambient relative humidity suggests that direct oxidation by aerosols of mineral dust might not be the transformation pathway of biogenic isoprene at night.
研究领域:
大气科学
·
环境化学
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Ming-Long Wang,Yi-Fei Sun,Hong-Nan Chen,Jin-Rong Zhong,Dan Rao,Yu Liu,De-Jun Xuan,Bei Liu,Chang-Yu Sun,Guang-Jin Chen
The CO 2 -H 2 O emulsion has multiple advantages in forming hydrate, such as easily adjustable CO 2 -to-H 2 O ratio, large contact area, strong sweep efficiency, and ability to carry chemical agents, which holds great promise for large-scale solid CO 2 geological sequestration. This paper systematically investigates the kinetics of hydrate formation from CO 2 -H 2 O emulsion and the corresponding morphological features in glass beads under different pore sizes at 3.27–7.15 °C and 10–14 MPa. Quantitative results on CO 2 hydrate formation rates, quantities, conversion rates, and hydrate saturations are obtained. Overall, under multi-factors, the conversion rates of CO 2 hydrate range from 22.9 % to 56.3 %, and hydrate saturations range from 18.5 % to 45.4 %. Here, lower temperature and higher pressure can enhance hydrate formation and increase the final conversion rate. As the pore size decreases, CO 2 hydrate conversion ratio increases, but the formation rate shows a significant decline. Additionally, under flowing conditions, hydrate conversion rates are further increased to 44.4 %–76.5 %, and its enhancement mechanism has been observed and revealed. Even though CO 2 droplets remain spatially separated, hydrate formation still demonstrates remarkably rapid propagation. These results prove the potential of CO 2 emulsion as an excellent medium for CO 2 hydrate storage and provide a direction for more effective carbon storage.
研究领域:
化学工程
·
环境科学
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高影响因子
Joule
·
2024
·
IF 38.6
Jun Wang,Jiajia Wang,Jianyong Feng,Yingfei Hu,Huiting Huang,Ningsi Zhang,Minyue Zhao,Wangxi Liu,Changhao Liu,Zhi Zhu,Shicheng Yan,Tao Yu,Ce Zhang,Wei Yao,Zhigang Zou,Zhaosheng Li
The primary source of oxygen in space exploration is derived from water electrolysis. Herein, we discovered a mild photochemical hydrogenation process that can convert CO 2 into carbon nanotubes (CNTs) and H 2 O by using a Co-based catalyst. Hence, astronauts can extract oxygen from CO 2 metabolism to close the oxygen recycling loop (overall reaction: CO 2 → C + O 2 ), allowing for ∼100% theoretical oxygen recovery. This photochemical technique has enabled a high turnover number (the molar ratio of C to Co) of 240 for CNT formation during a 100 h reaction in a flow reactor. The oxygen recovery efficiency reaches approximately 68% when using flowing CO 2 and H 2 , surpassing the theoretical maximum (50%) for the Sabatier reaction combined with water electrolysis at the International Space Station. The tip-growth mode of CNTs principally allows long-term oxygen recovery from CO 2 , in addition to space manufacturing of CNTs.
研究领域:
空间探索
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材料科学
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环境工程
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2023
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IF 2.6
Yan Feng,Shi-Hua Sang,Kuang-Yi Zhu,Chun-Tao Hu,Xiao-Feng Guo,Xiao-Tian Tan
The studies of mean activity coefficients of the NaBr–SrBr2–H2O solutions are of great significance for the development of underground brines in the Sichuan Basin of China. In this article, the mean activity coefficients of NaBr in the NaBr–SrBr2–H2O solutions have been studied by the cell potential method. The range of the determined ionic strength fraction yb of SrBr2 is 0.0, 0.2, 0.4, 0.6, and 0.8, and the total ionic strength I ranges from 0.0100 to 1.0000 mol·kg–1. First, the cell potentials of NaBr in NaBr–H2O solutions and NaBr–SrBr2–H2O solutions are measured by composite ion-selective electrodes. Then, the mean activity coefficients of NaBr in mixed solutions were calculated by using the measured cell potential data and the Nernst equation. Consequently, the mixed ion interaction parameters θNa+,Sr2+ and φNa+,Sr2+,Br– of the Pitzer model at 308.2 K were fitted by a multiple linear regression method. Finally, the above parameters and the Pitzer model were used to calculate the mean activity coefficients of SrBr2 and relevant thermodynamic properties (osmotic coefficient Φ, water activity aw, and excess Gibbs free energy GE) in NaBr–SrBr2–H2O solutions. In addition, the solubilities of NaBr and SrBr2 in mixed solutions were predicted using the Pitzer model. The predicted theoretical values are in good agreement with the experimental values. The fitted mixed ion interaction parameters have good applicability for solubility prediction.
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高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 32
·11010-11016
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IF 6.4
Fan Chen,Xiao-Jun Wang,Wenhao Bai,Xuehu Zhang,Wen Hao,Changhua Zhang,Tongtong Xuan
Zero-dimensional (0D) lead-free halide perovskites are emerging as promising light-emitters, which can be applied as light conversion materials for illumination and display. Herein, we prepared a series of Sb3+:Rb2InCl5·H2O perovskites by a simple and efficient coprecipitation method. The Rb2InCl5·H2O perovskite gives no emission due to the parity-forbidden transition. When Sb3+ is doped into Rb2InCl5·H2O, radiative transition occurs. Under 365 nm excitation, the Sb3+:Rb2InCl5·H2O perovskites show an intense orange-red emission peak at 615 nm, ascribed to the 3P1 to 1S0 transition of Sb3+. The brightest luminescence of Sb3+:Rb2InCl5·H2O was achieved by doping 40%Sb3+, with a high photoluminescence quantum yield (PLQY) of 62.1% and an external quantum efficiency (EQE) of 30.2%. Furthermore, the prepared Sb3+:Rb2InCl5·H2O perovskite exhibits a distinguished thermal stability. At 150 °C, its PL intensity remains 68% of that measured at room temperature, with a high thermal activation energy of 0.184 eV. By combining Sb3+:Rb2InCl5·H2O with a blue-emitting Eu2+:BaMgAl10O17 (Eu2+:BAM) phosphor, bright warm-white light with a color rendering index of 88 and a correlated color temperature of 3242 K was achieved. To sum up, the prepared Sb3+:Rb2InCl5·H2O orange-red perovskites have the advantages of suitable excitation and emission peak positions, high emission intensity, high PLQY and EQE, excellent stability, and environmental friendliness, making them very attractive in the field of lighting and displays.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Shumin Hong,Ting Li,Min Xiao,Teerawat Sema,Hongxia Gao,Zhiwu Liang
The concept of phase change absorbents has been widely studied as a novel and low-energy consumption option for CO 2 capture. This work screened diethylene glycol dimethyl ether (DGM) from 17 physical solvent species as a better phase change accelerator for absorbents of 2-(methylamino)ethanol (MAE)-physical solvent-H 2 O. Then, the optimized mass ratio of 30:49:21 for MAE-DGM-H 2 O solution was investigated with phase change behaviors, CO 2 absorption–desorption performance, cyclic capacity, and energy consumption. The experimental results showed that the cyclic CO 2 capacity reached 1.32 mol/L and the CO 2 -rich phase made up only 50.4 % of the total volume for the 30 wt%MAE-49 wt%DGM-21 wt%H 2 O, as well as its regenerative energy consumption was 40 % lower than that of 30 wt% monoethanolamine (MEA) solution. Also, the viscosity and surface tension gap of the CO 2 -rich phase and CO 2 -lean phase for the optimized absorbent were studied. It was observed that those gaps increase with the increasing mass ratio of DGM. In addition, the possible phase change mechanism was proposed by using the dipole moment values of components calculated by Gaussian (B3LYP/6-31G) coupled with 13 C NMR spectra.
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高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Hongyu Cen,Jiaojiao Cao,Zhenyu Chen,Xingpeng Guo
The corrosion inhibition performance of 2-mercaptobenzothiazole (MBTH) for carbon steel in a CO 2 -H 2 O system was investigated by weight loss, surface analysis, electrochemical measurements, and quantum chemical calculations. Results showed that MBTH could effectively protect carbon steel from CO 2 corrosion and inhibition efficiency of MBTH in supercritical CO 2 was higher than that in non-supercritical CO 2 situation. The differential capacitance curves revealed that excess positive charges would be on the surface of carbon steel in the supercritical-CO 2 system while negative charges accumulated on carbon steel surface in non-supercritical CO 2 condition. The adsorption model was proposed to explain the inhibition mechanism of MBTH.
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高影响因子
JOURNAL OF CATALYSIS
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2019
·
IF 7.723
Da Yang,Lei Liu,Dong-Liang Wang,Yong Lu,Xiao-Li Zhao,Ye Liu
A series of novel multi (bi-/tri-/tetra-)-dentate phosphines with good robustness against water and oxygen were synthesized and fully characterized. It was found that the developed ionic tri-dentate phosphine ( L2′ ) enabled Pd-catalyzed alkoxycarbonylation of alkynes most efficiently while H 2 O was used as an additive instead of acid. As for L2′ , its unique steric configuration with two types of potential P-P chelation modes (P⋯P distance of 4.31 Å and 4.36 Å respectively) to Pd-centre rendered the corresponding Pd-catalyst high activity and good stability for alkoxycarbonylation of alkynes. The in situ FT-IR analysis also verified that the formation and stability of Pd–H active species were greatly facilitated with the presence of L2′ as well as H 2 O additive. In addition, as an ionic phosphine, L2′ based PdCl 2 (MeCN) 2 system immobilized in RTIL of [Bmim]NTf 2 could be recycled for 7 runs without obvious activity loss or metal leaching.
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高影响因子
ACS Catalysis
·
2019
·
IF 12.221
Mengrui Zhang,Vikram Singh,Xuefu Hu,Xinyi Ma,Jingkun Lu,Chao Zhang,Jingping Wang,Jingyang Niu
Design and synthesis of high-performance heterogeneous catalysts are of immense interest in chemical industries. Herein, ultrafine H2O coordinated WOx nanoparticles (H2O–WOx, average diameter 2.24 nm) embedded into porous carbon matrix have been obtained via space-confinement pyrolysis with postmodification oxidation approach. The synthesized H2O–WOx nanoparticles exhibit high activities toward olefin epoxidation reaction using H2O2 as oxidant. In epoxidation of cis-cyclooctene, the turnover frequency of the catalyst can achieve as high as 949 h–1, an activity comparable to the highest of all reported early transition-metal based catalysts. UV–vis spectra and controlled catalytic experiments have been performed to ascertain the possible active site in the catalyst: compared with traditional WO3 and peroxide coordinated W-(η2-O2) species, the water coordinated H2O–WOx can transform to hydroperoxide HOO–WOx in the presence of H2O2, and the HOO–WOx species can be further activated by proton acid to enhance its catalytic activities.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Yujie Zhan,Jian Ji,Haibao Huang,Miao He,Dennis Y.C. Leung,Shuilian Liu,Yajie Shu,Qiuyu Feng,Ruijie Xie,Ruimei Fang,Xinguo Ye
Catalytic oxidation and AOPs normally require catalysts or chemical oxidants during VOCs degradation, making these processes costly and complex. We herein developed a facile system, VUV photolysis in pure water (VUV/H 2 O), for efficient VOCs degradation without auxiliary substances. The performance and mechanism of this system was intensively studied through controlling reaction conditions, detecting intermediates and analyzing reaction process during toluene degradation. Compared with direct VUV photolysis of gaseous toluene (VUV/Gas), the VUV/H 2 O system exhibited higher removal efficiency (83%) and mineralization rate (80%) of gaseous toluene bubbled into the system. In addition, no O 3 and gaseous byproducts were detected in the outlet gas stream. The excellent performance of VUV/H 2 O was attributed to the generation of more ·OH from the VUV photolysis of water and the continuous degradation of accumulated intermediates dissolved in water. The high CO 2 yield under an air atmosphere demonstrated that the dissolved oxygen in the water was essential for toluene mineralization since it was involved in the ring-fragmentation of toluene. According to various radicals and organic intermediates detected, possible pathway of toluene degradation in the VUV/H 2 O system was also proposed, which include OH addition, hydrogen abstraction and isomerization. The water after reaction can be effectively purified by sustaining VUV irradiation. This study presents a facile VUV/H 2 O system without auxiliary substances for efficient VOCs degradation and provides an insight into its degradation mechanism.
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高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Liang Jing,Qingmei Cen,Qi Pang,Jin Zhong Zhang
In this work, lead-free zero-dimensional (0D) all-inorganic perovskite Mn2+-doped Cs2InCl5·H2O microcrystals (MCs) with introduced Bi3+ ion were synthesized by supersaturation recrystallization at room temperature. The electronic bandgap of the MCs is tuned from ∼5.1 to ∼3.1 eV, and the electronic absorption is enhanced in the 200–400 nm region by Bi3+ incorporation. Upon excitation at 365 nm, the MCs with introduced Bi3+ exhibit strong red emission peaking at 640 nm, which is attributed to the Mn2+ transition (4T1g → 6A1g). Simultaneous Mn2+ and Bi3+ incorporation into Cs2InCl5·H2O shows 60 times enhancement of the 640 nm emission band compared to Mn2+ alone. This PL enhancement is attributed to the energy transfer (ET) from the [BiCl6]3– octahedron, which acts as a UV light absorber and exciton donor, to [MnCl6]4–. In addition, a yellow-light-emitting diode (LED) device based on the Cs2In0.45Bi0.55Cl5·H2O:17%Mn MCs was fabricated and evaluated, showing high color saturation at a drive current of 420 mA and good stability. This study demonstrates a new method for achieving efficient red emission by incorporating ns2 metal ions and Mn ions in 0D lead-free metal halides.
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高影响因子
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