JOURNAL OF HAZARDOUS MATERIALS
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2020
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IF 9.038
Shuyue Ren,Qiaofeng Li,Jingyi Wang,Bingyan Fan,Jialei Bai,Yuan Peng,Shuang Li,Dianpeng Han,Jin Wu,Jiang Wang,Kang Qin,Zunquan Zhao,Baoan Ning,Tie Han,Huanying Zhou,Zhixian Gao
A rapid and ultrasensitive method for colourimetric/photothermal dual-readout detection was developed using an 808 nm NIR laser and a thermal imaging app on mobile phone. Norfloxacin was used as a model contaminant to demonstrate this universal rapid detection method. It is innovatively, to use the advanced two-dimensional material black phosphorus as a colourimetric/photothermal reagent for the first time. The samples were added to the strip, and the analytes were selectively captured on the conjugate pad by monoclonal antibody-modified magnetic/upconversion nanocomposites . The samples flowed through the strips by capillary action until reaching the control line, where immune complex formation occurred due to the presence of secondary antibody. The added black phosphorus could be captured by the the antigens which were directly exposed to the test line and a brown band could be observed by naked eye. Upon illumination by NIR light for 1 min, the real-time temperature is obtained for quantitative analysis through the thermal imaging performed by mobile phone camera. This method can achieve the detection of norfloxacin in water samples within 20 min, and the detection limits of colorimetric and photothermal readout can reach 45 pg mL −1 . Compared with conventional strips, this method provided an increased sensitivity by about two orders of magnitude, with a integrated portable laser and a mobile phone. It is a valuable method for rapid detection and can be applied to other environmental contaminants as well.
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PubMed
高影响因子
Nano Energy
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2020
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IF 16.602
Shuai Zhang,Hongli Liu,Xianggao Li,Shirong Wang
All-inorganic perovskite quantum dots (PQDs) have attracted great attention in optoelectronic applications . However, compared with green and red PQDs, the poor photoluminescence quantum yield (PLQY) and terrible external quantum efficiencies (EQE) of blue-emission PQDs light-emitting diodes (QLEDs) have limited their further development in display field. Here, a general strategy for enhancing PLQY and EQE through lanthanum ions doping is proposed. Density functional theory (DFT) calculations confirmed that the partial substitution of La 3+ for Pb 2+ leads to a reduced defect states and an increased radiative recombination , meanwhile, a higher carrier temperature and exciton binding energy are also obtained. In consequence, a maximum PLQY of 84.3% is obtained for La 3+ -doped CsPb(Br x Cl 1-x ) 3 PQDs with emissions ranging from 448 to 500 nm. In terms of devices, phase separation and ion migration are effectively alleviated with La 3+ profiting from the constricted lattice and stronger interaction between La and Cl. Resultantly, QLEDs with La 3+ -doped PQDs show the maximum EQE of 2.17% (480 nm) and 3.25% (489 nm), which is higher than state-of-the-art records at this wavelength.
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高影响因子
MATERIALS & DESIGN
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2020
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IF 6.289
Guanghui Liu,Ju Xu,Ruixing Li
Recently, nano-cesium tungsten bronze (Cs x WO 3 ) is found to be a new candidate for the application in solar filter due to its high visible transmittance and excellent near-infrared shielding ability. However, a typical two-dimensional (2D) Cs x WO 3 has not been reported since 2D nanomaterials have attracted great attention due to their fascinating properties, e.g., graphene. Herein, a novel synthesis system and related mechanisms are tried to develop for synthesizing 2D Cs x WO 3 via hydrothermal method, which an original inspiration derived from the morphology control of sulfides. The results indicate that morphology modifier represents a new strategy in which thiourea and oleylamine interact synergistically rather than independently to synthesize 2D Cs 0.3 WO 3 . The more regular and larger the rectangular nanosheet, the broader and stronger the light absorption, the rectangular Cs 0.3 WO 3 nanosheets with the maximum size are synthesized from thiourea, oleylamine and HCl concentrations of 4, 0.061 and 320 mmol/L, respectively, and exhibit a broad and strong absorption spectrum. The above nanosheet shows excellent instantaneous photo-thermal conversion property resulting in an obvious temperature increases from 20 °C to 88.5 °C when it was irradiated by 50 W halogen lamp for 10 s. Finally, both chemical reaction and morphological evolution in the synthesis processes are revealed.
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高影响因子
CHEMISTRY OF MATERIALS
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2020
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IF 9.567
Chenghao Bi,Xuejiao Sun,Xin Huang,Shixun Wang,Jifeng Yuan,Jun Xi Wang,Tönu Pullerits,Jianjun Tian
All inorganic halide perovskites in the form of colloidal quantum dots (QDs) have come into people’s view as one of the potential materials for the high-efficiency solar cells; nevertheless, the high surface trap density and poor stability of QDs restrict the performance improvement and application. Here, we obtain colloidal inorganic perovskite CsPb1–xZnxI3 QDs by the hot-injection synthesis process with the addition of ZnCl2. Synchrotron-based X-ray absorption fine structures demonstrate that the guest Zn2+ ions are doped into the CsPbI3 structure to improve the local ordering of the lattice of the perovskite, reducing the octahedral distortions. The increase of the Goldschmidt tolerance factor and the Pb–I bond energy also enhance the stability of the perovskite structure. Furthermore, the Cl– ions from ZnCl2 occupy the iodide vacancies of the perovskite to decrease the nonradiative recombination. The synergistic effect of doping and defect passivation makes for stable colloidal CsPb0.97Zn0.03I3 QDs with ultralow density of trap states. The champion solar cell based on the QDs shows a power conversion efficiency of 14.8% and a largely improved stability under ambient conditions.
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高影响因子
Journal of Materials Chemistry C
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2020
·Vol. 8
·期 29
·9861-9866
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IF 7.059
Hanwen Zhu,Yu Tian,Supeng Yang,Yang Shen,Enze Xu,Jianxin Tang,Yang Jiang
Surface engineering and doping are common methods used to enhance the emission properties of perovskite quantum dot light-emitting diodes (PeQLEDs), and more effective methods need to be developed. Here, we introduce a spin-coated trioctylphosphine oxide (TOPO) layer that spontaneously forms concave–convex micro grid structures between the hole-transport layer (TFB) and the CsPbBr3 quantum dot (QD) layer. The unique concave–convex micro grid structures change with the concentration of TOPO solution and the type of solvent, which may be caused by the surface tension. Spectral measurements reveal that the TOPO layer passivates the surface defects between the perovskite QDs. The finite-difference-time-domain (FDTD) method proves that these concave–convex micro grid structures also increase light output from the quantum dot light-emitting diodes (QLEDs). As a result, green perovskite QD light emitting diodes (LEDs) of 514 nm with a Luminous Efficiency (LE) of 3975 cd m−2, Current Efficiency (CE) of 18.8 cd A−1 and External Quantum Efficiency (EQE) of 6.7% can be achieved, which are improved three-fold compared to the CsPbBr3 QLEDs without the TOPO layer. Our work suggests that the micro grid structures of the TOPO layer provide a novel and facile way to enhance the performance of the perovskite QLEDs.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2020
·Vol. 31
·期 2
·2001493
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IF 16.836
Qianqian Fan,Wei Guo,Yubing Si,Xin Wang,Bo Wang,Yongzhu Fu
Organosulfides are promising high-capacity cathode materials for rechargeable lithium batteries. However, they are hindered by several key challenges including the electronic/ionic insulation and solubility issues of the discharged products. Herein, TiS 2 nanosheets@carbon nanotubes (TiS 2 NSs@MWCNT) are proposed as a promoter and booster toward phenyl tetrasulfide (PTS). It serves as a bifunctional mediator, not only anchoring active materials in the cathode through chemical adsorption but also facilitating the reaction kinetics. The Li-organosulfide cell yields a reversible discharge capacity of 467.6 mAh g −1 and a high capacity retention of 81.9% after 200 cycles at 0.5 C rate. When the PTS areal mass loading is 5.8 mg cm −2 and the electrolyte/PTS ratio is 3.8 µL mg −1 , a high specific capacity of 444 mAh g −1 at 0.5 C rate can still be achieved. The strong anchoring and electrocatalysis effects of TiS 2 toward PhSLi and polysulfide are revealed using experimental and computational approaches. The study sheds light on metal sulfides as mediators to improve the cycling life of Li-organosulfide batteries and provides deep comprehension of the instinct interaction evolution at molecular level, which is invaluable for fabrication of electrode materials.
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高影响因子
Journal of Materials Chemistry C
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2020
·Vol. 8
·期 29
·9968-9974
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IF 7.059
Hui Xiao,Yi Wei,Peipei Dang,Shuang Liang,Ziyong Cheng,Guogang Li,Jun Lin
Perovskite nanocrystals (NCs) have aroused wide interest in the field of optoelectronics. Herein, a quantitative post-processing method is proposed to precisely alter the photoluminescence of lead halide perovskite NCs by ligand substitution using a multidentate multifunctional polymer ligand with amide, carboxylic acid and terminal double bond groups. Surprisingly, the synergistic effect of the ligand leads to a continuously blue-shifted emission over a wide visible region (∼100 nm) with increasing addition of the polymer ligand. Moreover, the full width at half maximum (fwhm) also gradually narrows, indicating the formation of a uniform particle size after the ligand surface interaction. Simultaneously, the terminal double bonds can be cross-linked with styrene to protect perovskite NCs from moisture. These results provide a new route for controllable photoluminescence regulation and preliminarily explore the correlation between the luminescence properties of perovskite NCs and polymer ligands.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Aizhao Pan,Lihe Yan,Xiaoqin Ma,Youshen Wu,Yanfeng Zhang,Guijiang Zhou,Ling He
Lead halide perovskite nanocrystals (NCs) have shown exceptional optoelectronic characteristics and photovoltaic performance ; however, their instability has limited their use in optoelectronic applications. Herein, we introduce a facile and effective in-situ synthesis strategy to prepare stable core-shell colloidal perovskite nanocrystal-polymer micelle composites (abbr. ap -POSS-PMMA- b -PDMAEMA@CsPbBr 3 ) by using amphiphilic copolymer (abbr. ap -POSS-PMMA- b -PDMAEMA) self-assembled “reverse micelle” templates. The amphiphilic block copolymer with hydrophobic ( ap- POSS and polymethylmethacrylate, PMMA) and hydrophilic blocks (poly 2-(dimethylamino)ethyl methacrylate, PDMAEMA) can be regulated to self-assemble into “reverse” micelles. The micelle serves as a confined nanoreactor during perovskite crystallization, which passivates the perovskite surface by forming a multidentate capping shell and yields the formation of multi-nanocubes with size between 6 and 8 nm and a photoluminescence quantum yield (PLQY) that surpasses 60%. Benefitting from femtosecond transient absorption (fs TA) and time-resolved photoluminescence (PL) spectroscopy studies, the excited carrier dynamics of the obtained composites substantiate fewer internal band-gap trap states from micelle-induced CsPbBr 3 NCs. The films cast from these composites showed enhanced water-resistant properties as compared to bare NCs and previously reported encapsulated NCs. Therefore, the copolymer “reverse” micelle induced in-situ grown NCs provide a potential approach for further engineering the morphology of NC-based composites and open the door to potential scalable and robust optoelectronic applications.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Bing Deng,Yanqing Zhu,Jingling Li,Xia Chen,Kun He,Juan Yang,Kaili Qin,Zhuoneng Bi,Xiudi Xiao,Shuaijun Chen,Xueqing Xu,Gang Xu
In this study, an efficient green light-emitting CuInS 2 /ZnS core/shell quantum dots were synthesized using a low temperature (130 °C) hot injection methods combined with multi-layers ZnS coating strategy. S-OAm (S powder dissolved in oleylamine) was used as sulfur source instead of conventional dodecanethiol, which supplied high concentration of H 2 S at low temperature and led to explosive nucleation of CuInS 2 and hence high concentration small size of CIS cores. Meanwhile, this method could supply enough sulfur sources for the ZnS coating process , resulting in high quality ZnCuInS 2 alloyed interface and ZnS surface coating layers, which led to excellent lattice match between the CuInS 2 core and ZnS shells, and better surface passivation . As the consequence, a maximum photoluminescence quantum yields of ∼85% at peak wavelength of ∼530 nm has been achieved. Based on this, the light emitting diodes with a maximum luminance of 4450 cd m −2 , luminous efficiency of 3.52 cd A −1 and an external quantum efficiency of 1.44% has been obtained, which is the best result so far for the green emission light emitting diodes based on the CuInS 2 quantum dots.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
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IF 16.683
Xuesong Zhao,Yingying You,Shaobin Huang,Yixiao Wu,Yiyang Ma,Guan Zhang,Zhenghua Zhang
Photocatalytic production of hydrogen peroxide from water and oxygen is a promising technique due to the green and sustainable solar-to-chemical energy conversion. However, in the absence of organic sacrificial agents as electron donors, the relatively low photocatalytic H 2 O 2 productivity is still far from satisfactory. Herein, we present a Z‐scheme photocatalytic production of hydrogen peroxide over Bi 4 O 5 Br 2 /g-C 3 N 4 heterostructure under visible light without additive organics. The obtained Bi 4 O 5 Br 2 /g-C 3 N 4 heterostructure exhibited a highest H 2 O 2 production of 124 μM in 60 min by a Z-scheme photocatalytic mechanism. The photoinduced electrons of Bi 4 O 5 Br 2 combine with the holes of g-C 3 N 4 at the contact interface, and the e − and h + of the heterostructure are mainly derived from the conduction band of g-C 3 N 4 and valence band of Bi 4 O 5 Br 2 , respectively. As such, more e − and h + of Bi 4 O 5 Br 2 /g-C 3 N 4 heterostructure are available to reduce oxygen and oxidize water, respectively, with more ·O 2 − and ·OH generated and thus more H 2 O 2 produced.
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高影响因子
JOURNAL OF LUMINESCENCE
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2020
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IF 3.28
Yue Lu,Yong Yang,Li Guan,Dawei Wang,Jinxin Zhao,Jingfa Yang,Zhiren Wei,Fenghe Wang,Zhiping Yang,Xu Li
ZnS coating with oleic acid nano-particles have been successfully synthesized through the oil-phase thermal injection method. As-prepared samples are characterized by powder X-ray diffraction, transmission electron microscopy and spectra analysis. The emission color of ZnS NPs changes from blue to cyan with different ratio of Zn/S. ZnS: x Eu 3+ NPs with different doping concentrations of Eu 3+ ions have different emission intensities and CIE coordination. The emission peaks vary with the change of y value of ZnSe y S 1- y NPs, and the chromaticity coordinate transit from green to yellow region. The emission color and mechanism of the luminescent properties of ZnS, ZnS: x Eu 3+ and ZnSe y S 1- y NPs are studied in detail. The results indicate that the thermal mixture injection without toxic is an effective and green method for synthesizing metal sulphitde, and the energy level structure, particle size, photoluminescence of ZnS can be achieved by forming different defect or doping of Eu or Se ions .
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
·
IF 10.652
Dejun She,Shaojun Peng,Li Liu,Huihui Huang,Yingyan Zheng,Yiping Lu,Daoying Geng,Bo Yin
Hypothermal photothermal therapy (HPTT) employs hyperthermia (<45 °C) to destroy tumor cells with negligible side effects to the surrounding normal tissues. Despite extensive studies, the clinical translation of HPTT is severely hindered, owing to the discounted therapeutic effect and maximum permissible power of near-infrared (NIR) laser by food and drug administration (FDA). Herein, we report a rational design of red blood cell membranes (RBCs) coated FeS 2 (FeS 2 @RBCs) with strong absorption at NIR-Ⅱ window for effective HPTT augmented chemodynamic therapy (CDT). FeS 2 @RBCs exhibits prolonged blood circulation and negligible immune response, leading to improved tumor accumulation for enhanced HPTT. Furthermore, the CDT effect of FeS 2 @RBCs is significantly augmented by the temperature elevation in the tumor region, which leads to the synergetic HPTT and CDT. Lipidomics analysis reveals that the damage of tumor cells by CDT is via the lipid peroxidation. In addition, FeS 2 @RBCs exhibits self-enhanced magnetic resonance imaging after reacting with H 2 O 2 in tumor region for imaging-guided laser irradiation. Thus, FeS 2 @RBCs achieves remarkable inhibition of subcutaneous 4T1 breast tumor growth without obvious side effects by a 1064 nm laser irradiation of 1.0 W/cm 2 (FDA approved power density). Overall, this work provides a HPTT augmented CDT strategy for effective cancer therapy with a clinical approved laser power, which may pave the way for the clinical application of HPTT augmented CDT in the future.
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高影响因子
危险品化学品经营许可证（带存储）