CERAMICS INTERNATIONAL
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2022
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IF 5.532
Chongguang Lyu,Yuchi Qian,Guixiang Zhan,Jiaxiao Yuan,Kaiyue He,Huihua Min,Chang Liu,Yang Cao,Xuefen Song,Huifang Ma,Yunfei Liu,Lin Wang
Rare earth ions have been widely investigated as active dopants in various materials because of their distinct optical, electronic and magnetic properties . Halide perovskite resistive memories have attracted increasingly recent interest for tremendous potential applications in computation and data storage techniques. However, it remains unexplored to implement rare earth doping strategy for tuning perovskite resistive memories. Here, we report read-only memories based on environment-friendly and air-stable lead-free double perovskite Cs 2 AgBiBr 6 films, which is particularly tuned by rare earth La 3+ doping. We use the vacuum sublimation and solution processing method to obtain Cs 2 AgBiBr 6 crystals doped by different content La 3+ , and fabricate resistive memory devices based on doped Cs 2 AgBiBr 6 films. The simplest sandwich-like structure composed of ITO/La-doped-Cs 2 AgBiBr 6 /Ag only is designed in cross-bar array architecture with high-integration and simple operation. The resistive memory device of La-doped Cs 2 AgBiBr 6 films demonstrate a typical write-once-read-many-times (WORM) behavior with low onset voltage of 1 V and long retention time of 12000 s. In particular, the ON/OFF ratio of the La-doped Cs 2 AgBiBr 6 film is 100 times higher than that of the undoped Cs 2 AgBiBr 6 film. This study provides a new insight to design and manipulate memory devices based on lead-free halide perovskite materials through doping effect of rare earth ions.
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ACS Sustainable Chemistry & Engineering
·
2022
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IF 9.224
Wenya Chen,Qingyun He,Ziyao He,Qin Wang,Jing Ding,Qiao Huang,Xiaojuan Liang,Zhaoping Chen,Weidong Xiang
In recent years, all-inorganic metal lead halide cesium perovskites (CsPbX3, X = Cl, Br, and I) have shown excellent luminescence performance in the field of wide color gamut backlight displays. However, Pb2+ in CsPbX3 easily leaks because of the unstable structure of CsPbX3, which seriously threatens human health. However, Mn-based metal halides (MHs) have unique environmentally friendly characteristics. In this work, Zn2+-doped Cs3MnBr5 MHs were successfully prepared, which exhibited highly efficient green emissions at 520–522 nm. Moreover, Cs3MnxZn(1–x)Br5 shows excellent stability at room temperature (25 °C) compared with Cs3MnBr5. More excitingly, when Cs3MnxZn(1–x)Br5 was encapsulated in a polystyrene (PS) polymer, Cs3MnxZn(1–x)Br5@PS showed better water, acid, daylight, and blue light stabilities. In addition, the backlight display device was designed based on different green–red ratios and thicknesses of Cs3MnxZn(1–x)Br5@K2SiF6:Mn4+@PS light conversion films, and the color gamut was over 109% of the NTSC 1953 standard, which is better than that of the reported WLED devices based on Mn-based MHs thus far. This work undoubtedly shows that Mn-based MHs have great application potential in wide color gamut backlight displays and provide a practicable route to fabricate nontoxic, low-cost, and high-performance liquid crystal displays.
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Journal of Cleaner Production
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2022
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IF 11.072
Xiran Lin,Tao Shen,Minghui Li,Jingwen Shaoyu,Wei Zhuang,Ming Li,Hong Xu,Chenjie Zhu,Hanjie Ying,Pingkai Ouyang
Effectively removing heavy metals from the wastewater using a green low-cost natural polymer-based adsorbent received a great deal of attention. In this study, natural γ-polyglutamic acid (γ-PGA) and ε-poly-L-lysine (ε-PL) functionalized lignin (DLGS and DLLS) were synthesized through demethylation/phenolation and amination to increase its intrinsic reactivity and adsorption sites, which were used to remove heavy metals from aqueous solutions. DLGS and DLLS were comprehensively characterized by 31 P, 2D HSQC NMR, and elemental analysis (EA). The adsorption property of DLGS and DLLS for Pb 2+ have been systematically investigated. The adsorption kinetics and isotherms were compliant with the pseudo-second-order model and Langmuir isotherm model, respectively. The maximum adsorption capacity of DLGS and DLLS for Pb 2+ was 275.9 and 231.8 mg g −1 at 298 K, respectively, which is higher than that of most of the lignin-based adsorbent reported. Furthermore, it is confirmed that DLGS and DLLS exhibit excellent selectivity for removing Pb 2+ through competitive adsorption experiments. Based on the Fourier transform infrared spectrum (FTIR) and X-ray photoelectron spectroscopy (XPS) and the density functional theory (DFT) calculations, the hydroxyl, carboxyl, amino, methoxyl, and dithiocarbamate groups are contributed to the binding with Pb 2+ , and density functional theory calculation further suggested dithiocarbamate and the carboxyl group are the primary active sites.
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ELECTROCHIMICA ACTA
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2022
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IF 7.336
Lusheng Liang,Qiu Xiong,Zilong Zhang,Yaming Yu,Peng Gao
Defects can easily form at the surfaces and grain boundaries of solution-processed organic-inorganic halide perovskites films, leading to undesired non-radiative recombination and ion migration in the device. Consequently, this limits the performance of perovskite solar cells (PSCs). Herein, a new organic ammonium halide salt with cyano (-CN) functional group, 4-cyanobenzenaminium iodide (CNBAI), was developed to passivate the defects in the bulk of perovskite films. It was found that the CNBAI can improve the film morphology of the perovskite layer and passivate the various types of defects in the perovskite. On the one hand, the -CN group could bind with the under-coordinated Pb 2+ and form intermolecular halogen bonds with the iodide atom in perovskite, as illustrated by X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy measurements. On the other hand, CNBAI could fill the iodide vacancy with its own iodide ions. For the first time, we demonstrate experimentally that the -CN group can simultaneously interact with Pb 2+ and form CN … I halogen bond in the perovskite. In addition, the introduced CNBAI improved energy alignment between the perovskite and adjacent charge transport layers. Finally, the PSCs fabricated with CNBAI-based perovskite films achieved the best PCE of 22.4% with negligible hysteresis and displayed good long-term stability.
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JOURNAL OF LUMINESCENCE
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2022
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IF 4.171
Xiao Wei,Yaqian Li,Tong Wang,Jifeng Guo,Shen Zhang,Xinyi Wang,Xinni Liu,Fengjie Wang
All-inorganic perovskite quantum dots (IPQDs) have become the most popular materials in the field of fluorescence detection due to their excellent optical properties . However, it is still a challenge to implement IPQDs detection in the water environment. In this work, IPQDs stably existing in aqueous solution were successfully prepared and used as fluorophores, and large mesoporous silica nanoparticles (LMSNs) were used as support. A novel LMSNs@IPQDs fluorescence sensor was developed for the specific fluorescence detection of tetracycline (TC) in aqueous solution. The results showed that there was a good linear relationship between the fluorescence quenching degree of LMSNs@IPQDs and TC concentration in the range of 0.7–15 μM, and the detection limit was 93 nM. The fluorescence quenching mechanism was mainly the electron transfer between TC and IPQDs. At the same time, the LMSNs@IPQDs fluorescence sensor had better specific selectivity and anti-interference ability to TC. The method was applied to the determination of TC concentration in water environment and the recoveries were 94.7%–106.3%. This work has achieved a breakthrough of IPQDs in water detection and opened up a way for the application of IPQDs in fluorescence detection.
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ACS Sustainable Chemistry & Engineering
·
2022
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IF 9.224
Yunlong Yang,Yuanlong Guo,Jili Yuan,Haibo Xie,Chengtao Gao,Tianxiang Zhao,Qiang Zheng
The design and facile preparation of ionic liquids (ILs)-functionalized polymer materials is a hot research topic due to their potential wide applications. Herein, taking the reaction advantage of a cyclic anhydride with an alcoholic compound to atom-economically generate a carboxyl ester pending a carboxylic acid moiety, porous organic framework (POF) materials pending carboxylic acids and imidazolium-based ILs (CILs-POFm) were facile synthesized via the acylation reaction of hydroxyl group-functionalized ILs with a styrene maleic anhydride copolymer. The CILs-POFm material properties were facilely adjusted by changing the molar ratio of the mono-hydroxyl-functionalized ILs to the dihydroxyl-functionalized ILs. CILs-POFm materials showed abundant mesoporous structures with a porous diameter of approximately 23.83–48.16 nm, a surface area of up to 274.4 m2 g–1, and a superior CO2 adsorption capacity of 1.71–2.14 mmol g–1 at 273 K and 1 atm. As a proof of concept application, the coupling reaction of epoxides with CO2 to produce cyclic carbonates was studied by using the CILs-POFm materials as catalysts under solvent-free and co-catalyst-free conditions. The findings indicated that the CILs-POF0.5 exhibited a satisfactory catalytic activity and reusability for a large scope of epoxides. Based on the experimental results and density functional theory (DFT) simulations, a synergetic catalytic mechanism was proposed based on the pended carboxylic acidic groups and IL groups. This study not only provided an atom-economic strategy to prepare POFs pending both carboxylic acids and ILs, but also showed new insights into the design of functionalized POF materials with great application potential in energy storage materials, separation, and green catalysis.
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INORGANIC CHEMISTRY
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2022
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IF 5.436
Wei Shen,Liu Yang,Jingting Feng,Yanfeng Chen,Wei Wang,Jianbin Zhang,Lihui Liu,Kun Cao,Shufen Chen
Generally, solvents used to synthesize perovskite NCs are toxic, which leads to waste liquid pollution and environmental degradation. Herein, we developed a novel environmentally friendly polar solvent method to synthesize CsPbBr3 nanocrystals (NCs). Over 65% photoluminescence quantum yield (PLQYs) for NCs could be maintained over 45–850 h of storage time, and a maximum was 78% at 750 h. Such amazing stability in polar solvents is dominated by a ripening process, which heals surface defects. Additionally, their solid films also exhibited good moisture stability. Furthermore, CsPbBr3 NCs were applied to inkjet-printing to prepare high-quality patterned films.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Lan Ding,Fenghua Bai,Burenbayaer Borjigin,Yuning Li,Huiqin Li,Xiaojing Wang
Solar-energy-driven CO 2 conversion into valuable chemical fuels holds great renewable potential. However, most photocatalysts' weak CO 2 adsorption limits more artificial photosynthesis for further utilization. Herein, we present an in situ assembling approach to produce stable Cs 2 AgBiBr 6 /Ce-UiO-66-H composite, in which a tight contact interface between the two participated components was constructed. Benefiting from the photocatalytic properties and high adsorption capacity for CO 2 , the optimized 20Cs 2 AgBiBr 6 /Ce-UiO-66-H adsorption-photocatalyst exhibits outstanding performance for reductive CO 2 deoxygenation with considerable CO generation rate (309.01 μmol g −1 h −1 ) under simulated solar light irradiation with 300 W Xe lamp, which is about 2.1 and 2.7 times than that of pure Cs 2 AgBiBr 6 and Ce-UiO-66-H, respectively. The excellent catalytic conversion of CO 2 is ascribed to the effective solar harvest and quickly photo-excited carriers’ separation in such assembled architecture. Importantly, due to the in-situ synthesis, Cs 2 AgBiBr 6 QDs are intercalated in the Ce-UiO-66-H frameworks and it could lead to improved stability and induce abundant oxygen vacancies in Cs 2 AgBiBr 6 /Ce-UiO-66-H, which can maintain unchangeable CO 2 conversion rate under wet air with consecutive ten hours of the recycling test. In this work, the combining metal–organic frameworks and lead-free halide perovskite provide great potential for artificial photocatalytic CO 2 -to-CO conversion under a mild gas–solid reaction condition via utilizing solar energy.
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CHEMICAL ENGINEERING JOURNAL
·
2022
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IF 16.744
Zihao Cui,Yaqiang Wu,Shuhui Zhang,Hui Fu,Guoqiang Chen,Zaizhu Lou,Xiaolei Liu,Qianqian Zhang,Zeyan Wang,Zhaoke Zheng,Hefeng Cheng,Yuanyuan Liu,Ying Dai,Baibiao Huang,Peng Wang
Lead-free halide perovskites have attracted a lot of attention as a new type of photoelectric conversion material in various solar energy-related applications involving photocatalysis. However, the perovskite photocatalysts still face the problem of insufficient performance arising mainly from the weak charge carrier migration currently. Exploring the strategies to promote the carrier separation efficiency maintains an urgent need. Different from the previous surface modification and construction of heterojunction, herein, we report a new lead-free perovskite solid solution of Cs 3 (Bi x Sb 1−x ) 2 Br 9 with tunable band gap prepared via a facile and efficient co-precipitation method. The introduction of Sb atoms in Cs 3 Bi 2 Br 9 has obviously broadened the absorption of visible light, and making it to be a prominent visible-light photocatalyst for the selective oxidation of thioanisole to methyl phenyl sulfoxide in n -hexane. The single-particle PL study proves that the obtained CBSB (Cs 3 (Bi x Sb 1−x ) 2 Br 9 ) solid solution has a longer carrier lifetime than Cs 3 Bi 2 Br 9 (CBB). In-situ ESR spectra demonstrate that O 2 − plays an important role during the oxidization process. The CBSB also has a superb stability, showing no apparent decrease in the catalytic activity in a five-cycle experiment. We believe our work can provide new understanding in promoting carrier lifetime of the lead-free perovskite materials, present a new approach for selective photo-oxidation, and may shed light on other solar energy conversion areas related to halide perovskites.
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Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 35
·12644-12651
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IF 8.067
Zhi-Bin Liang,Xu Chen,Xiang-Ji Liao,Jing-Jing Li,Yue Yang,Cai-Feng Wang,You-Xuan Zheng,Su Chen
Methods allowing the facile synthesis of chiral nanomaterials with interesting chiroptical properties are highly desirable. Herein, guided by fiber-spinning chemistry (FSC), we develop a one-step strategy enabling continuous production of stable chiral perovskite nanocrystals (PNCs) with high photoluminescence (PL) quantum yields (QYs) and circularly polarized luminescence (CPL). The FSC process uses spinning nanofibers of polyacrylonitrile (PAN) as reactors for in situ generation of chiral methylammonium lead bromine (MAPbBr3) PNCs tailored with R-(+)-methylbenzylammonium bromide (R-MBABr) or (S)-(−)-methylbenzylammonium bromide (S-MBABr). The resultant R(S)-MBABr-modified MAPbBr3 PNCs/PAN nanofiber films, referred to as R(S)-PNCs/PAN nanofiber films, show green fluorescence with a high PL QY of up to 88%, and preserve a PL QY of 60% after storage in the atmosphere for 180 days (vs. complete fluorescence quenching in 1 day in air for pristine R(S)-PNCs). Significantly, these nanofiber films exhibit circular dichroism (CD) and circularly polarized luminescence (CPL) with dissymmetry factor (glum) values of 10−3 at room temperature. Structural and optical characterization results confirm that R(S)-MBABr passivates the surface defects of MAPbBr3 PNCs to highly enhance the PL QY, and guarantees chirality transfer into PNCs to cause chiroptical features of CD and CPL, while the PAN nanofiber encapsulation greatly improves the PL stability of chiral PNCs. The R(S)-PNCs/PAN nanofiber films with excellent optical properties and stability are potential candidates for various optoelectronic applications.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2022
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IF 9.463
Baodeng Chen,Hongqiang Li,Shifeng Zhang,Xuejun Lai,Xingrong Zeng,Xiangrong Wu,Xiantao Cheng,Hong Liu
Ingenious microstructure design is crucial for piezoresistive pressure sensor to achieve excellent sensing performances and water repellency. Herein, we propose a new strategy to prepare high-performance polydimethylsiloxane (PDMS) sponge-based piezoresistive pressure sensor with superhydrophobicity. The silver nanoparticles and reduced graphene oxide on the skeleton surface of PDMS sponge jointly constructed mountain ridge-like microstructure and endowed the sensor with conductive network. The sensor exhibited high sensitivity, wide detection range, fast response and exceptional repeatability (4,000 loading–unloading cycles) and was applied for detecting human motions and daily scenarios. Owing to the hierarchical microstructure and the surface modification by 1H,1H,2H,2H-perfluorooctyltriethoxysilane, the sensor showed a high water contact angle of 156°, and the response signal kept stable even being sprayed by water. The prepared high-performance and superhydrophobic piezoresistive pressure sensor in this work has great potential in wearable electronics, healthcare monitoring and smart robot.
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Bioactive Materials
·
2022
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IF 16.874
Yue Xu,Yuan You,Luyao Yi,Xiaoyi Wu,Yaning Zhao,Jian Yu,He Liu,Ya Shen,Jingmei Guo,Cui Huang
Dental caries is one of the most prevalent human diseases resulting from tooth demineralization caused by acid production of bacteria plaque. It remains challenges for current practice to specifically identify, intervene and interrupt the development of caries while restoring defects. In this study, inspired by natural dental plaque, a stimuli-responsive multidrug delivery system ( [email protected] ) has been developed to prevent tooth decay and promote enamel restoration. Classic spherical core-shell structures of micelles dual-loaded with antibacterial and restorative agents are self-assembled into bacteria-responsive multidrug delivery system based on the pH-cleavable boronate ester bond, followed by conjugation with salivary-acquired peptide (SAP) to endow the nanoparticle with strong adhesion to tooth enamel. The constructed [email protected] specifically adheres to tooth, identifies cariogenic conditions and intelligently releases drugs at acidic pH, thereby providing antibacterial adhesion and cariogenic biofilm resistance, and restoring the microarchitecture and mechanical properties of demineralized teeth. Topical treatment with [email protected] effectively diminishes the onset and severity of caries without impacting oral microbiota diversity or surrounding mucosal tissues. These findings demonstrate this novel nanotherapy has potential as a promising biomedical application for caries prevention and tooth defect restoration while resisting biofilm-associated diseases in a controlled manner activated by pathological bacteria.
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