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Highlights: [•] The structural colored fiber was prepared by a magnetic field induced photopolymerization method. [•] Long-range one-dimensional superparamagnetic chains were formed in PEGDA resin. [•] The structural colors (blue, green, and red) were generated instantaneously in micro-space. [•] This process may have great potential for development in the actual fiber dyeing process. [ABSTRACT FROM AUTHOR]

The heterostruture system achieves an evolution yield of 287.08 µmol g−1 during 4h reaction with highly CO selectivity (99%), which is equivalent to a 3.87-fold improvement in CO evolution rate compared to the parent CPB QDs. [Display omitted] • Negatively charged Cu-TCPP nanosheets and positively CPB QDs yield heterojunction. • The CPB@Cu-TCPP-x photocatalyst exhibit enhanced photocatalytic conversion of CO 2. • The highest R electron is 150.1 µmol g−1h−1, higher than other CPB-based composites. CsPbBr 3 quantum dots (CPB QDs) have great potential in photoreduction of CO 2 to chemical fuels. However, the low charge transportation efficiency and chemical instability of CPB QDs presents a considerable challenge. Herein, we describe the electrostatic assemblies of negatively charged colloidal two dimensional (2D) Cu-Tetrakis(4-carboxyphenyl) porphyrins (Cu-TCPP) nanosheets and positively CPB QDs to construct the hydride heterojunction. The photogenerated electron migration from CPB QDs to Cu-TCPP nanosheets has been witnessed, providing the supply of long-lived electrons for the reduction of CO 2 molecules adsorbed on Cu-TCPP matrix. As a direct result, The CPB@Cu-TCPP-x (x wt% of CPB QDs) photocatalysts exhibit significantly enhanced photocatalytic conversion of CO 2 , compared to the parent Cu-TCPP nanosheets or single CPB QDs. Especially, when with 20% CPB QDs, the heterostruture system achieves an evolution yield of 287.08 µmol g−1 in 4 h with highly CO selectivity (99%) under visible light irradiation, which is equivalent to a 3.87-fold improvement compared to the pristine CPB QDs. Meanwhile, the CH 4 generation rate can be up to 3.25 µmol g−1. This optimized construction of heterostructure could provide a platform to funnel photoinduced electrons to the reaction center, which can both act as a crucial capture and the reaction actives of CO 2. [ABSTRACT FROM AUTHOR]

Abstract Dy3+-activated Bi 4 Si 3 O 12 -Bi 4 Ge 3 O 12 pseudo-system phosphors have been synthesized by a solid state reaction method and characterized using XRD, SEM and fluorescence spectrometry. Upon 279 nm excitation, the emission of Dy3+ ions is observed at 486 nm (blue), 574 nm (yellow) and 662 nm (red), corresponding to 4F 9/2 → 6H 15/2 , 4F 9/2 → 6H 13/2 and 4F 9/2 → 6H 11/2 transitions, respectively. The different kinds of excitation for the luminescence intensity behaviors have been discussed through efficient Bi3+ → Dy3+ energy transfer. As Si4+ is substituted by Ge4+, the crystallization and the intensity of emission are improved; however, the value of correlated color temperature (CCT) is also increased. The values of CIE chromaticity coordinates and CCT endorse warm white light emission from the phosphor. The paper shows that phosphor could be a potential single-emitting-component warm white emitting for LED applications. Graphical abstract The energy transfer process from Bi3+ to Dy3+ takes place in Dy3+-activated Bi 4 Si 3 O 12 -Bi 4 Ge 3 O 12 pseudo-system phosphors and the value of CCT will increase when Si4+ is substituted by Ge4+. fx1 [ABSTRACT FROM AUTHOR]