Journal of Energy Chemistry
·
2024
·
IF 14
Baofei Sun,Wei Chen,Yanyi Huang,Daofu Wu,Heng Luo,Faguang Kuang,Hongmei Ran,Yichen Liu,Liqin Gao,Jinchen Zhou,Bo Gao,Qiang Huang,Xiaosheng Tang
Metal halide perovskites (MHP) are potential candidates for the photocatalytic reduction of CO 2 due to their long photogenerated carrier lifetime and charge diffusion length. However, the conventional long-chain ligand impedes the adsorption and activation of CO 2 molecules in practical applications. Here, a ligand modulation technology is employed to enhance the photocatalytic CO 2 reduction activity of lead-free Cs 2 AgInCl 6 microcrystals (MCs). The Cs 2 AgInCl 6 MCs passivated by Oleic acid (OLA) and Octanoic acid (OCA) are used for photocatalytic CO 2 reduction. The results show that the surface defects and electronic properties of Cs 2 AgInCl 6 MCs can be adjusted through ligand modulation. Compared with the OLA-Cs 2 AgInCl 6 , the OCA-Cs 2 AgInCl 6 catalyst demonstrated a significant improvement in the catalytic yield of CO and CH 4 . The CO and CH 4 catalytic yields of OCA-Cs 2 AgInCl 6 reached 171.88 and 34.15 µmol g −1 h −1 which were 2.03 and 12.98 times higher than those of OLA- Cs 2 AgInCl 6 , and the total electron consumption rate of OCA-Cs 2 AgInCl 6 was 615.2 µmol g −1 h −1 which was 3.25 times higher than that of OLA-Cs 2 AgInCl 6 . Furthermore, in situ diffuse reflectance infrared Fourier transform spectra revealed the enhancement of photocatalytic activity in Cs 2 AgInCl 6 MCs induced by ligand modulation. This study illustrates the potential of lead-free Cs 2 AgInCl 6 MCs for efficient photocatalytic CO 2 reduction and provides a ligand modulation strategy for the active promotion of MHP photocatalysts.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Xuelian Liu,Min Ye,Fangyuan Lin,Ling-ou Yang,Jie Lin,Yaqi Jiang,Dongjie Tian,Xi Chen
Ammonia (NH 3 ) is a common pollutant in water and an important indicator of environmental pollution. Its determination is of great significance to environmental protection. We synthesized ligand-free Cs 2 AgInCl 6 :Bi at room temperature to establish a low toxicity, rapid, and simple fluorescence assay for the selective determination of NH 3 in water. Studies have shown that there is a good linear relationship with the concentration of NH 3 in the range of 1.00 ∼ 20.00 mg L -1 and the determination limit is 0.40 mg L -1 . The selectivity for NH 3 is higher than other substances may exist in the water (eg. Na + , SO 4 2- ). Subsequently, X-ray diffraction, scanning electron microscopy, fourier transform infrared spectroscopy, time-resolved fluorescence spectroscopy and ultraviolet absorption spectra were used to investigate the possible mechanism of NH 3 reaction with Cs 2 AgInCl 6 :Bi. The water samples of lakes and rivers were analyzed by the proposed method and indophenolblue method, the results shown that there is no significant difference between the two methods. The reliable results (0.1%< RSD < 4.1%) and the satisfactory recovery (99.0%∼102.5%) were obtained by direct determination method and mark recovery method. Therefore, the simple, rapid and low-toxicity fluorescence method established in this work provides a promising approach for NH 3 analysis in environmental water.
研究领域:
环境科学
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分析化学
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DOI
高影响因子
ACS Applied Optical Materials
·
2023
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IF 0
Yingzhen Wu,Lin Lin,Pan Lu,Wenjun Ma,Zheng Li,Mingze Zhang,Yuanming Yang,Niuniu Ju,Yanan Zhang,Huanjie Liao,Zhuohong Feng,Zhezhe Wang,Zhiqiang Zheng
Up until now, the applications of lanthanide ion-doped lead-free double perovskite Cs2AgInCl6 nanocrystals (NCs) have been rarely reported, especially in fluorescence anticounterfeiting and coding. Here, we successfully incorporated Tb3+/Ho3+ ions into Cs2AgInCl6 NCs by the hot-injection method. Benefiting from the energy transfer process, Tb3+- and Ho3+-codoped Cs2AgInCl6 NCs showed tunable emission color in a green-blue-orange triangle region. Combining our NCs with transparent ink for printing, we put forward the applications of color bar codes and color QR codes (3D codes) as well as information encryption. Compared with traditional codes, color bar codes and 3D codes conquer the shortcomings of low information density, weak information security, and poor aesthetics. Furthermore, through double-mode excitation, we list an encoding table corresponding to 26 letters and 10 numbers. The encoding table embodies the application value of information encryption and coding.
研究领域:
材料科学
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光学
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信息安全
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DOI
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 31
·15192-15199
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IF 3.925
Zhihui Rao,Zhilin Li,Xiujian Zhao,Xiao Gong
Cs2AgInCl6 lead-free double perovskites are environmentally benign with easily modulated fluorescence. However, their wide band gap (∼3.3 eV) and forbidden optical transitions limit their visible application. Herein, we prepared Cs2AgInCl6 microcrystals (MCs) and corresponding doped samples (bismuth: Bi3+, samarium: Sm3+, and Bi3+–Sm3+) to achieve such a functionality by a precipitation method at low temperature (80 °C). Bi3+-doped Cs2AgInCl6 MCs introduce 1S0 to 1P1 absorption with a fluorescence enhancement at lower excitation energy (370 nm). Although the f–f transition of Sm3+ is parity forbidden, Bi3+–Sm3+ co-doped Cs2AgInCl6 MCs show a combination of luminescence in the visible range with two sharp additional spectral features at 567 and 600 nm, which are attributed to the 4G5/2 → 6H5/2 (∼567 nm) and 4G5/2 → 6H7/2 (∼600 nm) transitions of Sm3+ ions. We proposed a mechanism in which Cs2AgInCl6:Bi–Sm MCs achieve mutual enhancement of fluorescence through recombination of self-trapped excitons and energy-transfer transitions. Moreover, thermogravimetric (TG) analysis indicated that the materials have remarkable thermal stability. Afterwards, light-emitting diodes (LEDs) with bright yellow light were fabricated by combining Cs2AgInCl6:Bi–Sm MCs with a 365 nm chip, and the corresponding color coordinate is about (0.535, 0.440) with a 2000 K correlated color temperature (CCT).
研究领域:
材料科学
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光学
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DOI
高影响因子
Materials Advances
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2022
·Vol. 3
·期 10
·4381-4386
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IF 0
Liyan Chen,Hangjie Jiang,Zhaohua Luo,Guoqiang Liu,Xianhui Wu,Yongfu Liu,Peng Sun,Jun Jiang
Cs2AgInCl6 lead-free double perovskite materials have potential applications in lighting and high-energy ray detection. However, the transition of Cs2AgInCl6 single crystals (SCs) is parity forbidden, resulting in low photoluminescence (PL) efficiency. In this study, we provide a strategy to break the parity forbidden transition by substituting Sc for In. The PL efficiency is greatly increased by 43%. In addition, the thermal stability is improved from 7.4%@475 K to 51.3%@475 K, which is attributed to the formation of Sc–Cl covalent bonds instead of In–Cl ionic ones. These results demonstrate that a suitable method makes a great contribution to promoting the possible application of Cs2AgInCl6 in the future.
研究领域:
材料科学
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光电
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固体物理
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DOI
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Keke Li,Sen Li,Wule Zhang,Zhifeng Shi,Di Wu,Xu Chen,Pei Lin,Yongtao Tian,Xinjian Li
Photocatalytic applications of halide perovskites have attracted increasing attention. However, lack of stability and lead toxicity of lead halide perovskites have hindered their applications. Metal halide double perovskite (DP) Cs 2 AgInCl 6 is a stable, environment-friendly semiconductor with direct band gap, and then the best promising alternative to lead halide perovskites. Here, the applications of Cs 2 AgInCl 6 DP to photocatalytic degradation of organic pollutants have been developed, in which the octahedral Cs 2 AgInCl 6 DP particles (~3.33 eV) were prepared by precipitation from acid solutions. The as-prepared samples exhibit high photocatalytic activity, which can degrade about 98.5% of water-insoluble carcinogen Sudan Red III in only 16 min, and have a good stability for 5 cycle operations. Furthermore, the Cs 2 AgInCl 6 DP also can degrade Rhodamine B, Methyl orange and Methyl red efficiently, demonstrating a highly-efficient and stable ethanol solvent-based photocatalytic system for organic pollutants degradation. The high photocatalytic activity could be attributed to direct band gap and long carrier lifetime of Cs 2 AgInCl 6 DP. These unique features of Cs 2 AgInCl 6 DP indicate that it could have a good application prospect for photocatalytic degradation of organic pollutants.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
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IF 5.3
Chenglin Gong,Lin Lin,Yingzhen Wu,Yanan Zhang,Zhuohong Feng,Zhezhe Wang,Yantang Huang,Zhiqiang Zheng
In this research, double perovskite quantum dots Cs 2 AgInCl 6 : Tb 3+ /Sm 3+ /Bi 3+ are synthesized employing a high-temperature thermal injection method. The temperature-dependent emission spectra and the fluorescence decay curves of samples show the quantum dots can be applied to dual-mode temperature sensing employing fluorescence intensity ratio technique (between 656 nm (Sm 3+ ) and 549 nm (Tb 3+ )) and fluorescence lifetime thermometry (549 nm (Tb 3+ )), achieving maximal relative sensitivities of 3.24%/K (351 K) and 0.68%/K (373 K), respectively. This study offers valuable insights into the temperature sensing capabilities of these quantum dots, which shows that these quantum dots are promising high-sensitivity dual-mode temperature sensing materials.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
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IF 9.038
Xiao-Kai Gong,Xiao-Song Zhang,Xin Liu,Ru-Kun Ding,Jia-Jia Zhang,Hao Yin,Zhao-Wei Zhang,Lan Li,Jian-Ping Xu
Lead halide perovskite have attracted world-wide attention regarding their serious hazards on ecological environment and human health. To improve both the emission intensity and stability of Cs 2 AgInCl 6 , this study explores using SiO 2 to structurally adjust Cs 2 AgInCl 6 . Note that including SiO 2 changed the growth style and crystal morphology of Cs 2 AgInCl 6 from an octahedron to a truncated octahedron. After structural adjustment, the unit cells scattered, and the absorption limit broke. Moreover, SiO 2 was demonstrated to passivate the material’s surface to form an anti-oxidation protective layer. Consequently, the photoluminescence emission intensity increased by 181.5% and the stability of Cs 2 AgInCl 6 improved by 83.11%. This work provides a methodology and reference for future improvements to the luminescence of Cs 2 AgInCl 6 . Furthermore, a novel double-emission phenomenon ( λ ex = 365 nm: λ em ≈ 580 nm; λ ex = 325 nm: λ em ≈ 505 nm) of Cs 2 AgInCl 6 at cryogenic temperatures (20 K) was discovered; this phenomenon explains the shoulder emission problem of 400–450 nm at room temperature and clarifies the luminescence mechanism of Cs 2 AgInCl 6 .
研究领域:
材料科学
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光学
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产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2021
·
IF 4.126
Qiaohui Liao,Qian Meng,Liang Jing,Jiamin Pang,Qi Pang,Jin Zhong Zhang
In this study, a facile approach is used to enhance the broad orange emission efficiency and stability as well as monodispersity of Cs2AgInCl6 nanocrystals (NCs) via doping Bi3+ and surface passivation with potassium bromide. While the pristine Cs2AgInCl6 NCs show an excitonic absorption peak at 280 nm, the doped NCs have an additional absorption peak at 365 nm, which is attributed to direct bismuth s–p transition. Compared to the low photoluminescence (PL) quantum yield (QY) of 0.04% for the pristine Cs2AgInCl6 NCs due to parity forbidden transition, the doped NCs show a PLQY of 5.82%, a significant improvement due to breaking of the parity forbidden transition. The PLQY can be further increased to 8.59% for Cs2AgIn0.9Bi0.1Cl6 when passivated with KBr. This work demonstrates that the combination of doping and surface passivation can substantially improve the PL of the Cs2AgInCl6 double perovskite. A model is proposed to explain the observed enhancement in PL and stability.
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
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Endian Cui,Xiangyang Yuan,Luomeng Tang,Lu Yang,Xiaoyan Yang,Xiaoling Liao,Jianfeng Tang,Yanan Zhao,Wei Sun,Kai Liu,Yingshuai Liu,Jing Liu
Incorporation of lanthanide ions (Ln 3+ ) can remarkably enhance the structural stability and optical properties of lead-free perovskite NCs. Herein, we have established the relationship between the intrinsic emission of Cs 2 AgInCl 6 host and the Ln 3+ by Eu 3+ , Tb 3+ doping in Cs 2 AgInCl 6 NCs, realizing tunable luminescence of NCs in the visible region. Experimental studies and density functional theory (DFT) calculations analysis show that Eu 3+ and Tb 3+ occupy the sites of In 3+ in Cs 2 AgInCl 6 , the defect formation energy for Cs 2 AgInCl 6 :Ln 3+ is larger than the pristine Cs 2 AgInCl 6 , resulting in a more stable cubic double perovskite structure. The optical band gap increases with the increase in Ln 3+ doping percentage. Turning excitation from 250 nm to 300 nm, the broad self-trapped excitons (STEs) emission is more remarkable, and the narrow Ln 3+ emission is less notable. The emitted color can be adjusted from white to red and to green light by altering the doping concentration of Eu 3+ or Tb 3+ and excitation wavelength. This work promotes the design and optoelectronic application of desired lead-free perovskites.
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
Materials Horizons
·
2023
·Vol. 10
·期 4
·1406-1415
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IF 13.3
Shiling Jin,Renfu Li,Jiwen Zhu,Tao Pang,Tianmin Wu,Hongbing Zhan,Yuanhui Zheng,Feng Huang,Xueyuan Chen,Daqin Chen
Nonlinear multi-phonon (2–7) absorption in the Na+/Bi3+-alloyed Cs2AgInCl6 lead-free double perovskites with ∼100% photoluminescence quantum yield and superior stability is observed for the first time, which can be pumped by a femtosecond laser in a wide spectral range (800–2600 nm). First-principles calculations verify that the parity-forbidden transition from the valence band maximum and conduction band minimum (at the Γ point) is not broken by Na+/Bi3+ doping, and strong optical band-to-band absorption occurs at the L&X points. Time-resolved emission spectra evidence that single-photon and multi-photon pumping leads to the same self-trapped exciton transition and high-order nonlinear absorption will not induce a remarkable thermal effect. Finally, we demonstrate that the Cs2Na0.4Ag0.6In0.99Bi0.01Cl6 DP shows great potential for next-generation wavelength-selective and highly sensitive multiphoton imaging applications.
研究领域:
材料科学
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光学
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光子学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nanoscience Au
·
2021
·
IF 0
Shixun Wang,Jinsong Qi,Stephen V. Kershaw,Andrey L. Rogach
Lead-free double cation metal halide perovskites have recently attracted considerable attention, with continuing research efforts focusing on the improvement of their stability and photoluminescence quantum yield (PL QY). In this study, Ce3+ has been co-doped together with Bi3+ into lead-free double perovskite Cs2AgInCl6 nanocrystals (NCs) in order to improve their crystallinity and PL QY. Both uncoordinated chloride ions and silver vacancies could be eliminated using this co-doping strategy, and the resulting Ce3+,Bi3+-co-doped Cs2AgInCl6 NCs showed adjustable PL emission peaks in the range of 589 to 577 nm by varying the doping amount of Ce3+ with a fixed feeding ratio of bismuth precursor set at 1%. Cs2AgInCl6 NCs doped with 1% Bi alone reached a PL QY of 10% for the PL peak centered at 591 nm, while those co-doped with 1% Bi and 2% Ce together achieved the highest PL QY of 26% for the PL peak centered at 580 nm. The use of Ce3+ as a dopant promoted the localization of self-trapped excitons to prevent PL quenching, although the ion’s 5d excited state may potentially provide an energetically favorable indirect route for the radiative relaxation process. This also resulted in a blue shift of the PL maximum and increased the exciton binding energy, thus promoting the radiative recombination of self-trapped excitons.
研究领域:
材料科学
·
光学
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DOI
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