JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Yang Liu,Feng-Qi Shi,Xin Hao,Meng-Yu Li,Lin Cheng,Cheng Wang,Kai-Yao Wang
Efficient adsorption of radioactive 137 Cs + and 60 Co 2+ and their decay products 137 Ba 2+ and 60 Ni 2+ bears significance for hazard elimination in case of nuclear emergency, which relies on the adsorption rate enhancement that takes advantages of compositional and structural optimization. Herein, we report a zinc-doped selenidostannate constructed from T2-supertetrahedral clusters, namely K 3.4 (CH 3 NH 3 ) 0.45 (NH 4 ) 0.15 Zn 2 Sn 3 Se 10 ·3.4 H 2 O ( ZnSnSe‐1K ). The soft Se and micro-porosity synergistically endow this material with a binding affinity to Cs + , Ba 2+ , Co 2+ , and Ni 2+ ions and ultrafast kinetics with R > 97.6% in 2–60 min. In particular, ZnSnSe‐1K can remove 99.34% of Cs + in 2 min ( K d Cs > 1.5 × 10 5 mL g −1 ), contributing to a record rate constant k 2 of 9.240 g mg −1 min −1 that surpasses all metal chalcogenide adsorbents. ZnSnSe‐1K exhibits good acid/base tolerance (pH = 0–12), and the adsorption capacities at neutral are 253.61 ± 9.15, 108.94 ± 25.32, 45.76 ± 14.19 and 38.49 ± 2.99 mg g −1 for Cs + , Ba 2+ , Co 2+ , and Ni 2+ , respectively. The adsorption performances resist well co-existing cations and anions, and the removal rates can keep above or close to 90% even in sea water. ZnSnSe‐1K is employed in continuous column and membrane filtration, both of which shows excellent elimination efficiency ( R > 99%) for mixed Cs + , Ba 2+ , Co 2+ , and Ni 2+ . Especially, the membrane with an ultrathin (70 µm) ZnSnSe‐1K layer can remove 97–100% Cs + in suction filtration with a short contact time of 0.33 s. Combined with the simple synthesis, facile elution and great irradiation resistance, ZnSnSe‐1K emerges as a selenide adsorbent candidate for use in environmental remediation especially that involving nuclear waste disposal .
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Nano Energy
·
2023
·
IF 17.6
Xiangcong He,Jinju Zheng,Tao Yang,Deliu Ou,Chris R. Bowen,Songhan Shi,Qiaochu Chen,Hui Fu,Shuangwu Huang,Yumin Ye,Xiaocheng Huang,Wenna Liu,Weiyou Yang
Piezoelectric nanogenerators (PENGs), which operate based on mechanical-to-electrical energy conversion, have been widely explored for exciting applications in modern devices such as wearable electronics , self-powered sensors, and energy harvesters . Herein, we report on high-performance PENGs based on Cs 2 Ag 0.3 Na 0.7 InCl 6 double perovskite (CDP) within a polyvinylidene fluoride (PVDF) matrix, which exhibit enhanced polarity due to rationally designed Zr/Te codoping. As a proof of concept , the resultant PENGs based on Zr/Te codoped CDP@PVDF deliver an excellent piezoelectric output, with a maximum open-circuit voltage and short-circuit current density of 67 V and 18 μA·cm −2 . This level of performance is ∼19 and ∼12 times higher than PVDF-based PENGs with no CDP, and ∼2 and ∼4 times higher than CDP@PVDF-based PENGs without doping or with single Te doping, and ∼1 and ∼2 times higher than CDP@PVDF-based PENGs with single Zr doping, respectively. Moreover, the as-assembled PENGs exhibit impressive potential in wearable energy harvesters, motion sensors, and DC-power devices with robust stability, underscoring their bright future toward practical applications.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Yinhua Wang,Songchao Bai,Hao Liang,Chao Li,Tianya Tan,Gang Yang,Jiwei Wang
Lead-free double perovskites have become the research hotspot in the optoelectronic fields. Then, it is a challenge to utilize the lattice doping by different rare earth ions with rich energy level and unique luminescence for emerging photonic applications. Here, we successfully prepared Sb 3+ and Ln 3+ ions doped Cs 2 NaYCl 6 single crystals (SCs), bringing tunable bright luminescent emissions of blue, red, and white light, the highest photoluminescence quantum yield (PLQY) is up to 58.33%. Based on excellent and tunable luminescent properties, the multicolor light-emitting diodes (LEDs) applications for the rare earth-based double perovskite SCs were designed. These findings indicate that rare earth-based double perovskite will provide a broader application space for lighting.
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DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 39
·15067-15073
·
IF 4.569
Yi Huang,Junben Huang,Yong Zhang
Metal thiophosphates have aroused much research interest due to their structural chemistry and possible applications as infrared functional materials. In this study, five quaternary Sr-based alkali metal thiophosphates ASrPS4 (A = Li, Na, K, Rb, Cs) were obtained. Their structural comparison shows that their symmetry undergoes transformation from tetragonal (I41/acd) to monoclinic (P21/c) to orthorhombic (Pnma) system, which is induced by the cation size effects and coordination features of different alkali metal cations. The experimental and theoretical results demonstrate that the band gaps of all title compounds are large, namely 3.6–3.9 eV (experimental results) and 3.78–4.12 eV (HSE06). Theoretical analyses indicate that the [PS4] group could be regarded as a good unit for designing wide band gap compounds, and the birefringence of NaSrPS4 is 0.08 at the fundemental 1064 nm wavelength, which shows that it may be a potential infrared birefringent material.
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CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Weijie Ren,Qing Chang,Ning Li,Jinlong Yang,Shengliang Hu
Carbon dots (CDs) are incorporated into the interlamination of covalent triazine frameworks (CTFs) for significantly enhanced photocatalytic H 2 O 2 production. Benefiting from CDs-induced rapid nucleation and growth of CTFs on their surface, it can be realized to achieve 13.5-fold increase in hourly productivity and the unique nanoscale sandwich structures featuring excellent charge separation properties. The resultant photocatalyst allows both the oxygen reduction reaction and water oxidation reaction to generate H 2 O 2 at the same time, exhibiting H 2 O 2 yield exceeding the production rate of the pure CTFs 22.6 folds and a solar-to-chemical conversion efficiency of 0.16%. The experimental results reveal that CDs play multiple roles in CTFs, including timely extraction and storage of photoexcited holes and the creation of intermediate bands favoring long wavelength light absorption and utilization. Besides, CDs-induced surface polarization electric field in the interlamination of CTFs can be modulated by simply adsorbing alkali metal ions to further facilitate the carrier separation and migration. As thus, the promising H 2 O 2 production efficiency is achieved.
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CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Liangmiao Zhang,Yi Du,Hui Xia,Fang xia,Guang Yang,Yanfeng Gao
Hydroxypropyl cellulose (HPC) hydrogel is a promising material for fabricating energy saving smart windows. However, its lower critical solution temperature (LCST = 42 °C) is much higher than comfortable room temperatures. In this work, we applied surface polymerization of acrylic acid (AA) monomers on HPC chains and synthesized HPC-polyacrylic acid (PAA) hydrogels with precisely controllable LCST in the range of 23.0–42.0 °C. The fabricated HPC-PAA hydrogel smart windows exhibited excellent T lum , 22 °C of 91.8% and ΔT sol , 22–40 °C of 73.7%, outperforming VO 2 hydrogel composites and photothermal nanoparticles doped hydrogel smart windows. Meanwhile, cesium tungsten bronze (Cs 0.32 WO 3 ) photothermal nanoparticles can be introduced to the HPC-PAA hydrogel matrix, and the near infrared (NIR) shielding ability of Cs 0.32 WO 3 allowed significant reduction of NIR transmittance of the smart windows from 81.7% to 41.6% at 22 °C, and from 19.3% to 3.6% at 40 °C. Temperature regulation tests in model houses revealed outstanding heat-shielding performance of Cs 0.32 WO 3 (0.4 wt %)/HPC-PAA hydrogel smart windows, especially compared with ordinary double-glass windows. Furthermore, the HPC-PAA hydrogel and Cs 0.32 WO 3 (0.4 wt %)/HPC-PAA hydrogel are non-toxic, biocompatible, low-cost, suggesting their suitability for energy-saving smart window applications.
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ADVANCED MATERIALS
·
2022
·Vol. 34
·期 43
·2204801
·
IF 32.086
Fei Zhang,Yingchun Zhou,Zhipeng Chen,Meng Wang,Zhuangzhuang Ma,Xu Chen,Mochen Jia,Di Wu,Jiawen Xiao,Xinjian Li,Yu Zhang,Zhifeng Shi,Chongxin Shan
Flexible scintillator screens with environmental stability, high sensitivity, and low cost have emerged as candidates for X-ray imaging applications. Here, a large-scale and cost-efficient solution synthesis of the vacancy-ordered double perovskite Cs 2 ZrCl 6 , which is characterized by thermal activation delayed fluorescence (TADF) dominated by triplet emission under X-ray irradiation, is demonstrated. The large Stokes shift and efficient luminescence collection of TADF effectively ensure the light outcoupling efficiency. Further, flexible X-ray scintillator screens with an area of 400 cm 2 are prepared using poly(dimethylsiloxane) (PDMS) as the carrier, exhibiting excellent scintillation properties with light yields as high as 49 400 photons MeV −1 , spatial resolutions up to 18 lp mm −1 and detection limits as low as 65 nGy s −1 . Finally, the high-quality imaging results of non-planar and dynamic objects by such screens are demonstrated. It is believed that the explored Cs 2 ZrCl 6 @PDMS flexible scintillator screens would offer a big step toward expanding the application range of scintillators in different environments.
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Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 48
·18154-18163
·
IF 8.067
Bingxu Liu,Lihua Wang,Xiao Gong,Haiguang Zhao,Yuanming Zhang
Luminescent solar concentrators (LSCs) are large-area sunlight collectors, and they are able to reduce the cost of electricity and are suitable for application in building integrated photovoltaics. The key factor determining the optical efficiency of the LSC is the optical properties of the fluorophores. Among various types of fluorophores, carbon quantum dots (C-dots) have attracted great attention because of their size/shape/composition dependent optical properties and high stability. Although LSCs based on C-dots have been reported recently, it is still a big challenge to produce highly-bright cost-effective C-dots on a large-scale via a simple approach for efficient LSC fabrication. In this work, we demonstrate a simple solvent-free heating method using metal salts as dehydrating agents to produce C-dots in a large-quantity (100 gram per batch). The as-prepared C-dots have a typical absorption ranging from 300 to 500 nm, a large Stokes shift of 0.73 eV, a quantum yield (QY) as high as 70% and a small absorption/emission spectral overlap. The metal cation can not only contribute to the dehydration of the precursors, but also cap the C-dot surface by forming a stable structure, leading to a strong absorption peak at 405 nm and a large Stokes shift because of the intermediate energy states. Compared to Cu, Fe, Mg, Al, and Sr cations, Ca2+/Ba2+ capped C-dots exhibited the highest QY because of the efficient surface passivation. As a proof-of-concept, we fabricated the laminated LSCs using the as-obtained C-dots as fluorophores. The optimized LSC based on C-dots produced using BaCl2 or CaCl2 exhibits an external optical efficiency as high as 3.2% with a lateral size of 100 cm2. These results indicate that the solvent-free heating method can provide high-quality C-dots as building blocks for potential LSC applications.
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Analytical Methods
·
2022
·Vol. 14
·期 45
·4669-4679
·
IF 3.532
Lvcheng Liu,Yuqi Ling,Junshan Han,Tingting Hao,Xing Li
Solvated mercuric ions (Hg2+), a toxic and harmful water pollutant, can easily accumulate in organisms and cause serious damage to the kidney, liver, and central nervous system. To realize rapid and efficient detection of mercury (II) ions in water sources, a kind of new colorimetric sensor of gold nanoparticles (AuNPs) functionalized with ribavirin (Rib-AuNPs) was proposed and characterized by TEM, DLS, XRD, and UV-vis in this work. The color of the Rib-AuNP solution rapidly changed from wine-red to gray-blue with the addition of Hg2+ based on the aggregation mechanism. The limits of detection (LODs) are 0.20 μM by the naked eye and 3.64 nM by UV-vis spectroscopy with a fine linear relationship in the range of 0–0.25 μM (R2 = 0.9834) and 0.25–0.80 μM (R2 = 0.9893) of Hg2+, indicating that the detection system of Rib-AuNPs could be applied to analyze Hg2+ with excellent selectivity and anti-interference in real water samples.
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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2022
·Vol. 331
·期 12
·5641-5648
·
IF 1.754
Smolenski Valeri,Novoselova Alena,Yan Yongde,Xue Yun,Ma Fuqiu
The equilibrium potentials of Me(III)/Me (Me = Dy, U) couples and the double Me–Ga, Me–Cd alloys vs. Cl − /Cl 2 reference electrode were measured at the temperature range 673–973 K in molten LiCl–KCl–CsCl eutectic by open-circuit potentiometry. The apparent standard potential and the base thermodynamic properties of alloys were determined. Separation factor for Dy/U couple was calculated on gallium and cadmium electrodes. In addition, it was found that the application of gallium electrodes has a significant advantage over cadmium electrodes in the process of electrochemical separation of uranium and dysprosium.
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JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Meiting Yang,Shun Cheng,Fan Yang,Hangtao Ye,Yihuang Chen,Weidong Xiang,Shuang Pan,Xiaojuan Liang
Metal halide perovskite has been widely researched in the field of wide color gamut backlight due to its excellent luminescence properties. However, the toxicity of lead and thermal stability issue greatly hindered its practical application. In this regard, environmentally friendly manganese halide perovskites has intrigued great attention. Herein, facile yet robust preparation of highly emissive all-inorganic manganese halides is presented via a one-step pure aqueous solution-based method without using corrosive acid solution. The introduction of Zn 2+ cation-alloying enables the weakly luminescent Cs 3 MnCl 5 to exhibit exceptionally efficient green emission at 521 nm. The alloyed Cs 3 Mn x Zn (1-x) Cl 5 exhibits superior optical properties as well as improved thermal stability. In particular, alloyed Cs 3 Mn x Zn (1-x) Cl 5 still retained 74% of the initial fluorescence intensity when the heating temperature was raised up to 225 °C. Furthermore, within the protective encapsulation of polydimethylsiloxane (PDMS) matrix, the prepared Cs 3 Mn x Zn (1-x) Cl 5 @PDMS films demonstrates excellent air, water and blue-light stability, which can be readily applied as light conversion films in backlit display. The as-prepared Cs 3 Mn x Zn (1-x) Cl 5 @K 2 SiF 6 : Mn 4+ @PDMS films displayed excellent quality and the color gamut was over 113% of the NTSC 1953 standard. This work provides a simple and effective pure aqueous-based strategy for the development of environment-friendly perovskite materials for the application of wide color gamut backlit display.
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Small
·
2022
·Vol. 18
·期 44
·2204198
·
IF 15.153
Mengyan Cao,Zhilin Li,Xiujian Zhao,Xiao Gong
Lead-free perovskites have gained much interest for photovoltaic and optoelectronic applications. But instability and low quantum efficiency significantly limit their prospects for future applications. Here, a general route is reported to synthesize highly stable lead-free perovskites on a large scale with remarkably enhanced quantum efficiency. Two typical vacancy-ordered double perovskites (Cs 2 ZrCl 6 and Cs 2 SnCl 6 ) and their corresponding Bi 3+ or Sb 3+ doped samples are synthesized in ionic liquids (ILs) solutions via a simple solution method. These prepared perovskite samples all exhibit high-quality crystalline structures and their photoluminescence quantum yields (PLQYs) all show an increase close to 200% compared to the samples prepared in the hydrochloric acid system. The PLQY of Sb-doped Cs 2 ZrCl 6 with excellent thermal stability can reach up to 90.2%, which is the highest value reported for this system (Cs 2 ZrCl 6 :Sb). Density functional theory calculations reveal that the corresponding interaction between the ILs and the samples can effectively improve the crystal quality and reduce energy loss. The potential applications of the prepared samples for high-performance white light-emitting diodes and optical anti-counterfeiting are also demonstrated. The findings provide a straightforward way to obtain ultrahigh quantum efficiency vacancy-ordered double perovskites with good thermal stability and excellent optoelectronic properties.
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