Small
·
2022
·Vol. 18
·期 41
·2203152
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IF 15.153
Jingjing Wang,Shaofeng Zhang,Yunfei Li,Cuiyu Wu,Wenfei Zhang,Hailong Zhang,Zheng Xie,Shuyun Zhou
The continuous white-light emission of carbon dots (CDs) can be applied to producing multicolor laser emissions by one single medium. Meanwhile, the solid-state emission greatly contributes to its practical application. In this work, a strategy to realize the in-situ hybridization of silane-functionalized CDs (SiCDs) and 1,3,5-benzenetricarboxylic acid trimethyl ester (Et3BTC) by a one-pot solvothermal method is reported. Significantly, the SiCDs/Et3BTC hybrid crystals exhibit ultra-broadband random laser emission over the near ultraviolet-visible region under 265 nm nanosecond pulsed laser excitation. The wavelength region of laser emission is achieved from 315 to 600 nm within an emission band of CDs-based materials. It is worth noting that the wavelength range of the laser is wider than the previously reported works. It is proposed that the continuous white-light emission of SiCDs caused by multiple fluorescence centers mainly gives rise to the broadband random laser emission. Moreover, the crystals are conducive to forming resonance and realizing solid-state laser emission. This in-situ method is expected to enable a more convenient, cheaper, and greener approach to prepare luminescent hybrids for application in multicolor laser displays, multi-level laser anti-counterfeiting, supercontinuum light sources, and so on.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Chunping Su,Mengxi Cheng,Fan Tian,Fengxi Chen,Rong Chen
In this work, gold/bismuth oxychloride (Au/BiOCl) nanocomposites with different morphologies were successfully prepared by simple solvothermal method and sodium borohydride reduction method, which exhibited significantly efficient visible-light-driven photocatalytic disinfection for Staphylococcus aureus ( S.aureus ). Particularly, the flower-like Au/BiOCl nanocomposite showed the highest photocatalytic bactericidal performance among the prepared Au/BiOCl samples. The radical trapping experiments revealed that the hole was the main reactive species responsible for the inactivation of S.aureus over Au/BiOCl composite. The enhanced photocatalytic bactericidal effect could be attributed to the enhanced adsorption intensity of visible light that originated from the surface plasmon resonance (SPR) effect of Au, rapid transfer and space transport of hot electrons caused by the hierarchical structure of BiOCl layered compound. Furthermore, the Au/BiOCl coating prepared on stainless steel wire mesh via in-situ synthesis method exhibited excellent superhydrophilic/underwater superoleophobic performance, which endowed the coating with anti-oil-fouling in water. More importantly, compared with Au/BiOCl powder catalyst, the prepared Au/BiOCl coating with anti-oil-fouling also possessed high photocatalytic bactericidal activity and stable recycling performance.
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ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Aicheng Zhang,Xuwen Wu,Xinping Ouyang,Hongming Lou,Dongjie Yang,Yong Qian,Xueqing Qiu
Inspired by the UV-blocking of lignin in plants and the adhesion of catechol in mussel dopamine, light-colored lignin-based microcapsules ((OMC + BMDM)/LS-OH3-T) with strengthened UV-blocking and good bioadhesion were obtained by demethylation modification of sodium lignosulfonate (LS) and encapsulation of chemical sunscreen actives. The results show that the adhesion between LS and skin improved from 0.158 to 0.173 mN/m due to the formation of catechol groups. When (OMC + BMDM)/LS-OH3-T was used as the unique active ingredient in the sunscreen, the sun protection factor (SPF) reached 86.67, fully meeting the daily sunscreen requirement. In addition, the color of microcapsule-based sunscreen was close to pure white, which effectively solves the dark color problem of the existing lignin-based sunscreens. As it demonstrates good biocompatibility, this new light-colored lignin-based sunscreen agent has good application potential in the skincare field.
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Chaoqun Li,Sai Shi,Dong Gao,Boying Li,Guoqiang Song,Yafei Chen,Hailong An,Chengfen Xing
The gated state of anion channels is involved in the regulation of proliferation and migration of tumors. Specific regulators are urgently needed for efficacious cancer ablation. For this purpose, it is essential to understand the molecular mechanisms of interaction between the regulators and anion channels and apply this knowledge to regulate anion channels. Transmembrane 16A (TMEM16A) is the molecular basis of the calcium-activated chloride channels. It is an anion channel activated by Ca2+, and the inhibition of TMEM16A is associated with a decrease in tumorigenesis. Herein, we characterized a natural compound procyanidin (PC) as an efficacious and selective inhibitor of TMEM16A with an IC50 of 10.6 ± 0.6 μM. Our research revealed the precise sites (D383, R535, and E624) of electrostatic interactions between PC and TMEM16A. Near-infrared (NIR)-light-responsive photothermal conjugated polymer nanoparticles encapsulating PC (CPNs-PC) were established to remotely target and regulate the TMEM16A anion channel. Upon NIR irradiation, CPNs-PC downregulated the signaling pathway downstream of TMEM16A and arrested the cell cycle progression of cancer cells and improved the bioavailability of PC. The tumor inhibition ratio of CPNs-PC was superior to PC by 13.4%. Our findings enabled the development of a strategy to accurately and remotely regulate anion channels to promote tumor regression using NIR-light-responsive conjugated polymer nanoparticles containing specific inhibitors of TMEM16A.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Longshi Rao,Qing Zhang,Bin Sun,Mingfu Wen,Jiayang Zhang,Shudong Yu,Ting Fu,Xiaodong Niu
Cesium lead halide perovskite crystals have attracted widespread attention due to their excellent photoelectric properties. However, their intrinsic instability and the photoluminescence quantum yield (PLQY) sharply dropped in the solid-state limit their practical applications. Besides, the current synthesis strategies either need a variety of ligands, or an anti-solvent, which will result in potential environmental risks. Herein, we address the above issues simultaneously by embedding CsPbBr 3 in a large bandgap Cs 4 PbBr 6 matrix by high-speed mechanical mixing without using any ligands and highly toxic anti-solvent. Changing the molar ratio of PbBr 2 /CsBr, centrifugation time, and the solution concentration, the optimized CsPbBr 3 /Cs 4 PbBr 6 show a high PLQY of up to 79%. In addition, mechanistic studies show that the origin of green luminesce of CsPbBr 3 /Cs 4 PbBr 6 microcrystals is closely related to the CsPbBr 3 inclusion theory, but not to the Br vacancy theory, in which CsPbBr 3 embedded in Cs 4 PbBr 6 to form a CsPbBr 3 /Cs 4 PbBr 6 heterostructure . By taking advantage of the heterostructure, the photostability and thermostability of CsPbBr 3 /Cs 4 PbBr 6 are significantly enhanced. In addition, the high optical and temperature/humidity-stable performances of CsPbBr 3 /Cs 4 PbBr 6 are verified by applying them to white LEDs (WLEDs). The electroluminescence intensity of WLEDs remains 70% of the original one after being stored in a chamber with high temperature and high humidity (85 °C/RH 85%) for 40 h, and the device displays luminous efficiency of 74.5 lm/W at 20 mA. This result provides a solid foundation for their scale applications in lighting, displays, and other optoelectronic and photonic devices.
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Hongyuan Li,Bowen Zhang,Bo Zhang,Hari Bala,Xiangli An,Nian Sha,Zeyu Sun,Wei Zhang,Zhanying Zhang
All-inorganic perovskite materials have attracted much attention in the field of photocatalysts due to their unique photoelectric properties.However, the inherent poor stability of perovskite quantum dots significantlyhinders their practical applications. Herein, to settle the instabilities of inorganic perovskite materials, Sn-TiO 2 coated CsPbBr 3 quantum dots named CsPbBr 3 /Sn-TiO 2 , are fabricated via resaturated recrystallization, sol–gel coating and solvothermal crystallization.The XRD results demonstrated that the core–shell structure of CsPbBr 3 /Sn-TiO 2 nanocrystals was successfully synthesized.Moreover, excellent dispersion is verified for CsPbBr 3 /Sn-TiO 2 nanocrystals with a core–shell structure by TEM. The particle size of CsPbBr 3 /Sn-TiO 2 nanocrystals is 15–30 nm, where the core size for CsPbBr 3 quantum dots is 4–8 nm, and the Sn-TiO 2 shell thickness is 2–8 nm.The photocatalytic activity of nanocomposites was studied by the photodegradation of RhB aqueous solution under the irradiation of 100 mWcm −2 air mass 1.5 global AM1.5G sunlight. Compared with traditional photocatalyst P25, the core–shell structured CsPbBr 3 /Sn-TiO 2 nanocrystals exhibited better photocatalytic performance, with a degradation efficiency of 96.6% and a degradation rate constant of 10.68 × 10 -2 min −1 in 30 min of catalytic time, which was five times higher than that of P25.The core–shell structured CsPbBr 3 /Sn-TiO 2 nanocrystals have long-term stability in water system and have potential practical application value in the field of environmental governance.
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ANALYTICA CHIMICA ACTA
·
2022
·
IF 6.911
Yu Du,Siqi Yu,Zhaohui Li,Huangxian Ju
This work designs a competitive consumption strategy of surface electron donor and light absorption for quenching the photocurrent of ZnSnO 3 nanocubes/BiOI nanoarrays/polydopamine (ZnSnO 3 NCs/BiOI NAs/PDA) as a photoactive material. This material can be formed on electrode surface by successive coating and deposition to provide a substrate for immobilization of capture antibody, and producing strong photocurrent in the presence of ascorbate acid as a surface electron donor due to the well matching structure of band gaps between ZnSnO 3 NCs and BiOI NAs, the excellent light absorption ability and high photo-electron conversion efficiency of BiOI NAs and PDA, and the accelerated electron transfer . Using ascorbate oxidase loaded dopamine-melanin nanosphere (DAM-AAO) as a label of the signal (secondary) antibody, the sandwich-type immunoreaction leads to dual photocurrent quenching of the label through the competitive consumption of ascorbate acid with enzymatic oxidation and the light absorption by DAM nanosphere. Thus, a sensitive “On-Off” photoelectrochemical (PEC) immunosensing method is constructed for the analysis of neuron specific enolase (NSE). The proposed method shows a detection range of 0.1 pg/mL −50 ng/mL and a detection limit of 0.03 pg/mL. The excellent performance and the recovery text demonstrated the practicability of the designed strategy and label in immunoassay of different protein biomarkers.
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Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 28
·14923-14932
·
IF 14.511
Qianqian Fan,Siying Wei,Jianzhong Ma,Wenbo Zhang,Lu Wen
In recent years, the focus on lead-free halide perovskite nanocrystals (NCs) has now been shifted to their utilization as photocatalysts due to their strong light absorption and tunable photo-responsive range. Current studies have promised Cs2AgBiBr6 NCs to be a born photocatalytic material that will self-passivate to generate BiOBr when it encounters water. In this work, a unique Cs2AgBiBr6/BiOBr composite was found in water-soaked Cs2AgBiBr6 NCs, which was further diagnosed as a Z-type heterojunction to enhance the photocatalytic process. Meanwhile, variations in the structure and photocatalytic behavior of Cs2AgBiBr6 NCs in RhB solution with different water contents were investigated in detail. Results showed that appropriate water content could accelerate the visible-light-driven degradation of RhB by almost 1.5 times, but excessive water (more than 50 vt%) may result in weak or negative enhancement. Accordingly, the bandgap matching, carrier separation and the resultant photocatalytic mechanism of water-soaked Cs2AgBiBr6 NCs were discussed and proposed. This research will offer a new idea for the application of halide perovskite in a water-involved photocatalytic system.
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PROGRESS IN ORGANIC COATINGS
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2022
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IF 6.206
Jian Wei,Li Yuan,Guozheng Liang,Aijuan Gu
Endowing near-infrared light (NIR) induced self-healing coatings with high transparency is an interesting issue with big challenge. Herein, starting from designing an acrylate resin system and surface activated W 18 O 49 nanowires (mW 18 O 49 ), a new kind of NIR induced self-healing composite coating was developed, which is coded as ACWx (x is the loading of mW 18 O 49 in each coating). The effect of mW 18 O 49 loading on the integrated performance of ACWx coatings was studied. As the content of mW 18 O 49 increases, the transparency of ACWx coatings decreases, but the transmittance at 550 nm of all coatings is still >83.9 %. In addition, ACW0.5 and ACW0.65 composite coatings exhibit outstanding NIR induced self-healing ability after irradiation under NIR (power density of 2.5 W/cm 2 ) for 3 min. Meanwhile, the integrated properties including adhesion, flexibility, hardness, gloss, acid and alkali resistance of ACWx composite coatings meet the application requirements of automotive varnishes.
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Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 19
·4930-4938
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IF 7.779
Ying Lv,Yunkai Li,Siting Fan,Changjian Chen,Yuting Cai,Hai Xu,Rong-Jun Xie
Here, we report a yellow phosphor (Ba,Sr)Si3Al3O4N5:Yb2+, which not only has an ultra-high internal quantum efficiency of 86.9% and a full width at half maximum of 146 nm (4712 cm−1), but also shows superior water resistance and thermal stability. The thermal quenching activation energy of the optimized Ba0.5Sr0.4Si3Al3O4N5:0.1Yb2+ phosphor was determined to be 0.25 eV. By combining a 450 nm chip with (Ba,Sr)Si3Al3O4N5:Yb2+, a single-phosphor-converted warm white light-emitting diode with CIE chromaticity coordinates of (0.3289, 0.3539), a correlated colour temperature of 5650 K and a colour rendering index of 80 under a driven current of 150 mA was successfully fabricated. A high temperature aging test demonstrated the excellent luminous efficacy (98.5%@288 h) and CIE chromaticity coordinate stability of the white light-emitting diode.
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JOURNAL OF MATERIALS SCIENCE
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2022
·Vol. 57
·期 32
·15474-15487
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IF 4.682
Liu Jiaxin,Qi Fei,Zhang Nan,Yang Jiayu,Liang Zhiyu,Tian Changqing,Zhang Wenxia,Tang Xiaosheng,Wu Daofu,Huang Qiang
Exploring novel and efficient photocatalysts to accelerate CO 2 photoreduction into useful chemicals or fuels is of great significance. In this work, we developed the three-dimensional (3D) structural heterojunction photocatalysts composed of ReS 2 and Cu 2 O by a drop-casting approach. The ReS 2 microspheres with nanosheets were deposited on the 3D structure of Cu 2 O/Cu foams. The analysis of UV–Vis absorption and PL spectra showed that the ReS 2 @Cu 2 O/Cu heterostructure delivered enhanced visible light absorption and improved charge carrier separation. The resulting ReS 2 @Cu 2 O/Cu-180 exhibited the CO yield of 14.3 µmol g −1 under the visible light irradiation. The realized S-scheme heterostructure not only promoted the separation of the photogenerated electron and hole pairs, but also enhanced the visible light absorption. Furthermore, the enriched electrons with high reducing abilities aggregated into the conduction band and diffused to the surface of Cu 2 O for favoring the CO 2 reduction and CO formation. This study is expected to provide a strategy to prepare high-performance S-scheme photocatalysts to perform efficient photocatalytic CO 2 reduction.
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JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Yunyan Kang,Dongna Li,Riyue Dong,Haoran Zhang,Wei Li,Xuejie Zhang,Xian Yang,Bingfu Lei
Red carbon dots (R-CDs), yellow-green carbon dots (Y-CDs) and blue carbon dots (B-CDs) were successfully synthesized by one-step hydrothermal method using o-phenylenediamine and dopamine hydrochloride as raw materials by adjusting the pH of the reaction solvent. The Fourier transform infrared (FT-IR) spectra, X-ray photoelectron spectroscopy (XPS) spectra and optical properties of CDs show that these three CDs have similar types but different contents of functional groups, resulting in different fluorescence emission . R-CDs and Y-CDs compound with polyvinyl alcohol (PVA) to form bright R-CDs/PVA and Y-CDs/PVA phosphors, while B-CDs/PVA phosphors have weak fluorescence. Compared with R-CDs and Y-CDs solution, the fluorescence emission of the phosphors was significantly enhanced for the matrix inhibits the process of non-radiative transition. Based on the thermostability and broad emission peaks of CD-based phosphors, light-emitting diode (LED) was fabricated using R-CDs/PVA and Y-CDs/PVA phosphors as fluorescent material. The prepared LED exhibits white light with a color coordinate of (0.32, 0.33), correlated color temperature (CCT) of 6067 K and color rendering index (CRI) of 78.2. The environmental-friendly CD-based white light-emitting diode (WLED) was successfully fabricated.
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