Designing and Fabricating a Vulcanized ZnAl LDH-Modified g‑C₃N₄ Heterojunction for Enhanced Visible-Light-Driven Photocatalytic Degradation Activity

Modulation of the structure and composition of a binary heterojunction can skillfully transfer photoinduced charge carriers and perfectly boost the photodegradation performance of pollutants in wastewater under a 300 W Xe lamp illumination. Herein, a novel binary heterojunction ZnAlSx@g-C3N4 with different load proportions of ZnAlSx was perfectly constructed by readily hydrothermal treatment and characterized experimentally by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, Fourier transform infrared spectroscopy, UV–vis spectroscopy, diffuse reflectance spectroscopy, photoluminescence, and so forth. The photodegradation performance of tetracycline (TC) by prepared ZnAlSx@g-C3N4 was measured under various photocatalytic conditions, including TC pollutant concentration, catalyst dosage, pH values, and competing ions in the photocatalytic system. The results suggested that the ZASCN-3 (30 wt % of ZAS compared to CN) composites exhibited the best photodegradation activity (94.05%), with h+ as the primary active substance and O2•– as the second-most important substance, which was over 2.2 and 5.0 orders of degradation rate higher than pure ZAS and CN, respectively. The improved photocatalytic ability of ZASCN composites was put down to intimate contact interfaces between ZAS and CN and Z-scheme electron–hole pairs induced, which were sped up by the efficient separation of photogenerated carriers. In addition, the ZASCN-3 composites exhibited an outstanding stable photodegradation activity based on the cycling test and the superior widespread applicability toward other pollutants, including dyes, antibiotics, and environmental water. The plausible Z-scheme photocatalytic mechanism for TC degradation over the ZASCN hybrid was surmised according to the trapping experiments

Additional file 1: of Synthesis of Nitrogen and Sulfur Co-doped Carbon Dots from Garlic for Selective Detection of Fe3+

Figures S1–S8 and Tables S1–S4. Figures depicting AFM and XRD (Figure S1), absorption of different volume of EA and different reaction time (Figure S2), QY of different reaction time and TEM of CD-1 (Figure S3), FTIR of CD-1 and CD-4 (Figures S4), XPS spectra of CD-1 and CD-4 (Figures S5 and 6), QY of different amount of S source (Figures S7), absorption and PL of S source (Figures S8), different reaction temperature (Table S1), comparison of different natural materials (Table S2), elemental compositions (Table S3), comparison of Fe3+ detection (Table S4)(DOC 2718 kb

Efficient Homojunction/Heterojunction Photocatalyst via Integrating CsPbBr₃ Quantum Dot Homojunction with TiO₂ for Degradation of Organic Dyes

A novel TiO2–CsPbBr3(Q) photocatalyst is proposed and rationally constructed, where CsPbBr3 perovskite quantum dots (QDs) of various sizes inside mesopore TiO2 (M-TiO2) are integrated. These perovskite QDs, generated in situ within M-TiO2, establish a type-II homojunction. Interestingly, a Z-scheme heterojunction is simultaneously formed at the interface between CsPbBr3 and TiO2. Due to the coexistence of the type-II homojunction and the Z-scheme heterojunction, photogenerated electrons are effectively transferred from TiO2 to CsPbBr3, thereby suppressing carrier recombination and thus enhancing the degradation of rhodamine B (RhB). Compared with pure CsPbBr3 and TiO2, TiO2–CsPbBr3(Q) shows significantly enhanced photocatalytic performance for RhB degradation. The degradation efficiency of RhB in the presence of the TiO2–CsPbBr3(Q) attains 97.7% in 5 min under light illumination, representing the highest efficiency observed among photocatalysts based on TiO2. This study will facilitate the development of superior semiconductor catalysts for photocatalytic applications

Efficient and Stable CsPb(Br/I)₃@Anthracene Composites for White Light-Emitting Devices

Inorganic perovskite quantum dots bear many unique properties that make them potential candidates for optoelectronic applications, including color display and lighting. However, the white emission with inorganic perovskite quantum dots has rarely been realized due to the anion-exchange reaction. Here, we proposed a one-pot preparation to fabricate inorganic perovskite quantum dot-based white light-emitting composites by introducing anthracene as a blue emission component. The as-prepared white light-emitting composite exhibited a photoluminescence quantum yield of 41.9%. By combining CsPb­(Br/I)₃@anthracene composites with UV light-emitting device (LED) chips, white light-emitting devices with a color rendering index of 90 were realized with tunable color temperature from warm white to cool white. These results can promote the application of inorganic perovskite quantum dots in the field of white LEDs

Wanderungsbewegungen in Europa Perspektiven und Aufgaben ; ein Diskussionspapier der Kommission der EKD fuer Auslaenderfragen und Ethnische Minderheiten

BAFl / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Mn-Doped Multiple Quantum Well Perovskites for Efficient Large-Area Luminescent Solar Concentrators

Luminescent solar concentrators (LSCs) can be used as large-area sunlight collectors, which show great potential in the application of building-integrated photovoltaic areas. Achieving highly efficient LSCs requires the suppression of reabsorption losses while maintaining a high photoluminescence quantum yield (PLQY) and broad absorption. Perovskites as the superstar fluorophores have recently emerged as candidates for large-area LSCs. However, highly emissive perovskites with a large Stokes shift and broad absorption have not been obtained up to now. Here, we devised a facile synthetic route to obtain Mn-doped multiple quantum well (MQW) Br-based perovskites. The Br-based perovskite host ensures broad absorption. Efficient energy transfer from the exciton to the Mn dopant produces a large Stokes shift and high PLQY simultaneously. By further coating the perovskites with Al2O3, the stability and PLQY are greatly elevated. A large area of liquid LSC (40 cm × 40 cm × 0.5 cm) is fabricated, which possesses an internal quantum efficiency (ηint) of 47% and an optical conversion efficiency (ηopt) reaching 11 ± 1%, which shows the highest value for large-area LSCs

There was a correlation between the levels of CLU and GRP78 in clinical HCC specimens.

<p>(A–B) Representative immunostaining for CLU and GRP78 is shown for three patient samples (A: ×50; B: ×200). (C) Positive correlation between CLU expression and GRP78 level was examined in tumor tissues derived from 96 patients (r = 0.294, <i>P</i><0.01).</p

CLU associates with GRP78 under ER stress conditions.

<p>(A) Western blot confirmed the presence of GRP78 in CLU co-IP. HCC cell lines (SMMC7721, HCCLM3 and HepG2) were treated with 1 µg/ml TN for 24 h. Pre-cleared protein from whole cell lysates were incubated with goat anti-CLU antibody and then detected with anti-GRP78. (B–D) HCC cell lines (SMMC7721, HCCLM3 and HepG2) were treated with 1 µg/ml TN for 24 h and then co-immunostained with anti-CLU (green) and anti-GRP78 (red). The signals were detected with A1R MP Multiphoton Confocal Microscope. (E) CLU-HepG2 cells were treated with 1 µg/ml of TN for 24 h, the GRP78 was detected by immunostaining with anti-GRP78 (red). Ectopically expressed CLU is tagged with GFP (green). All these data were from a representative experiment and the representative result was from at least three independent experiments.</p

CLU knockdown enhances TN treatment induced apoptosis in SMMC7721 and HCCLM3 cells.

<p>(A–B) SMMC7721 and HCCLM3 cells were infected twice for a total of 2 days (1 day for each infection). The expression of CLU in SMMC7721 and HCCLM3 cells were inhibited through lentivirus-mediated shRNA interfering followed by 1 µg/ml of TN treatment for 24 h. Protein extracts were analyzed for CLU, GRP78 and GAPDH. (C–D) CCK8 assay was performed to determine cell viability after TN treatment with indicated concentrations for 24 h. The results indicated a synergistic effect of CLU knockdown with TN treatment. The values of relative survival rate were normalized with untreated cells. *<i>P</i><0.05, versus mock group. TN-induced cell apoptosis in SMMC7721 and HCCLM3 cells were measured by Western blot analysis of PARP cleavage (CF, cleaved form) (E–F) and flow cytometry (sub-G1) (G–J). All these data were from a representative experiment and the representative result was from at least three independent experiments.</p

CLU induction following TN treatment is cytoprotective via increasing the expression of GRP78.

<p>(A) Control, mock and CLU-HepG2 cells were treated with 1 µg/ml of TN for 24 h. Protein extracts were analyzed for CLU, GRP78 and GAPDH. (B) CCK8 assay was performed to determine cell viability after TN treatment with indicated concentrations for 24 h. The values of relative survival rate were normalized with untreated cells. *<i>P</i><0.05, versus mock group. (C–E) TN-induced cell apoptosis in HepG2 cells were measured by Western blot analysis of PARP cleavage (CF, cleaved form) and flow cytometry (sub-G1). The results indicated that CLU played a protective role on HCC cells under ER stress condition. (F) HepG2 cells were transfected with scramble siRNA or siRNA specific for GRP78 followed by 1 µg/ml of TN treatment for 24 h. Protein extracts were analyzed for GRP78 and GAPDH. Knockdown of GRP78 expression in HepG2 inhibited TN induced GRP78 expression. (G) CLU overexpressed HepG2 cells were transfected with scramble siRNA or siRNA specific for GRP78 followed by 1 µg/ml of TN treatment for 24 h. Protein extracts were analyzed for CLU, GRP78 and GAPDH. (H–J) TN-induced cell apoptosis in HepG2 cells were measured by Western blot analysis of PARP cleavage (CF, cleaved form) and flow cytometry (sub-G1). The results suggested GRP78 may be important in mediating the protective effect of CLU under ER stress condition. All these data were from a representative experiment and the representative result was from at least three independent experiments.</p