CARBOHYDRATE POLYMERS
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2017
·
IF 4.811
Qiyang Wang,Jinhua Guo,Yixiang Wang,Lingyun Chen,Jie Cai,Lina Zhang
In this study cellulose hydrogels with lanthanide ions nanoparticles embedded in were prepared via in situ doping using a low-temperature alkali hydroxide/urea aqueous solution as a cellulose solvent. Depending on the type and relative concentrations of the constituent lanthanide ions, the color of light emission were modulated to generate the three primary colors and other adjusted colors by blending red, green and blue at certain ratios. This work has opened new and convenient pathway to create regulated fluorescent cellulose hydrogels for potential applications in the fields of bioimaging and fluoroimmunoassay.
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APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Fengyu Tian,Dongfang Hou,Fuchao Hu,Kui Xie,Xiuqing Qiao,Dongsheng Li
1D porous CdS nanoparticles/TiO 2 nanofibers heterostructure has been fabricated via simple electrospinning and a successive ionic layer adsorption and reaction (SILAR) process. The morphology, composition, and optical properties of the resulting CdS/TiO 2 heterostructures can be rationally tailored through changing the SILAR cycles. The photocatalytic hydrogen evolution and decomposition of rhodamine B (RhB) of the as-synthesized heterostructured photocatalysts were investigated under visible light irradiation. Compared to TiO 2 nanofibers，the as-obtained CdS/TiO 2 heterostructures exhibit enhanced photocatalytic activity for hydrogen production and decomposition of RhB under visible-light irradiation. The heterojunction system performs best with H 2 generation rates of 678.61 μmol h −1 g −1 under visible light irradiation which benefits from the two effects: (a) the 1D porous nanofibrous morphology contributes to not only more active sites but also more efficient transfer of the photogenerated charges (b) the synergetic effect of heterojunction and photosensitization reducing the recombination of photogenerated electrons and holes.
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CHEMISTRY-A EUROPEAN JOURNAL
·
2016
·Vol. 22
·期 34
·12160-12165
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IF 5.771
Fang Chen,Zhaohui Ren,Siyu Gong,Xiang Li,Ge Shen,Gaorong Han
Graphical Pick a side : Ag 2 O was selectively deposited on the positive polar surface of ferroelectric PbTiO 3 (PTO) nanoplates by a photochemical reaction. Formation of Ag 2 O is attributed to the oxidation of freshly formed silver nanoparticles by oxygen during visible-light irradiation. The composite shows efficient photocatalytic performance, which may be caused by the ferroelectric polarization effect of the PTO nanoplate. In this work, single-crystal and single-domain PbTiO 3 nanoplates are employed as substrates to prepare Ag 2 O/PbTiO 3 composite materials through a photodeposition method. It is revealed that silver oxide nanocrystals with an average size of 63 nm are selectively deposited on the positive polar surface of the ferroelectric substrate. The possible mechanism leading to the formation of silver oxide is that silver ions are first reduced to silver and then oxidized by oxygen generation. The composite shows an efficient photodegradation performance towards rhodamine B (RhB) and methyl orange (MO) under visible-light irradiation. Such highly efficient photoactivity can be attributed to the ferroelectric polarization effect of the substrate, which promotes the separation of photogenerated electrons and holes at the interface.
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Nanophotonics
·
2016
·Vol. 5
·期 4
·565-572
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IF 4.333
Wei Chen,Kai Wang,Junjie Hao,Dan Wu,Jing Qin,Di Dong,Jian Deng,Yiwen Li,Yulong Chen,Wanqiang Cao
In this research, we have developed an approach by incorporating quantum dots (QDs) with red emission into mesoporous silica microspheres through a non-chemical process and obtained luminescent microspheres (LMS). Owing to the lattice structure of LMS, QDs were effectively protected from intrinsic aggregation in matrix and surface deterioration by encapsulant, oxygen and moisture. The LMS composite has therefore maintained large extent luminescent properties of QDs, espe-cially for the high quantum efficiency. Moreover, the fabricated white light emitting diode (WLED) utilizing LMS and YAG:Ce yellow phosphor has demonstrated excellent light performance with color coordinates around (x = 0.33, y = 0.33), correlated color temperature between 5100 and 5500 K and color rendering index of Ra = 90, R9 = 95. The luminous efficiency of the WLED has reached up to a new record of 142.5 lm/W at 20 mA. LMS provide a promising way to practically apply QDs in lightings and displays with high efficiency as well as high stability.
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Journal of Materials Chemistry C
·
2024
·
IF 5.7
Ciyuan Huang,Shasha Shi,Songlin Cai,Yue Qiao,Caiyun Wang,Linji Yang,Yuchen Wang,Hao Cheng,Tao Yang,Kai Huang,Bingsuo Zou,Tao Liu
Congo red (CR), a stable benzidine diazo dye due to its azo bonds, resists natural photodegradation and poses a significant ecological threat. Herein, organic photocatalyst material PM7:ITC-2Cl@C was integrated with natural biochar to establish a high-performance photocatalyst coupling with adsorption. PM7:ITC-2Cl@C demonstrated complete degradation of 100 mg/L CR in 10 min under indoor weak light, sustaining degradation efficiency above 99% within 20 cycles. The removal efficiency of TOC contents in simulated aquatic environment containing 100mg/ L of CR were over 81%. PM7:ITC-2Cl@C possesses broad photon utilization (450-760 nm) and sequential measurements confirm its remarkable electron-hole separation, and the catalyst surface with functional groups containing oxygen and hydrogen also aids radical generation. Additionally, the strong adsorption of biochar fosters an environment for effective interaction with active oxygen species, ensuring constant pollutant contacting. Moreover, radical quench measurements indicated h+, ·OH, and ·O2- as key reactive oxygen species. The potential degradation pathways of CR were explored via LC-MS and DFT analysis, while toxicity analysis revealed low toxicity in the intermediates, suggesting the promising prospects of this system. This approach demonstrates the high-performance PM7:ITC-2Cl@C to significantly enhance the catalytic oxidative degradation process of dying wastewater.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2024
·Vol. 22
·期 1
·1-11
·
IF 10.6
Wang Zhiwen,Jiang Nan,Jiang Zhixin,Wang Hao,Guo Yuxin,Zhong Fanglu,Gui Bin,Chen Yueying,Deng Qing,Zhou Qing,Hu Bo
Efficient thrombolysis in time is crucial for prognostic improvement of patients with acute arterial thromboembolic disease, while limitations and complications still exist in conventional thrombolytic treatment methods. Herein, our study sought to investigate a novel dual-mode strategy that integrated ultrasound (US) and near-infrared light (NIR) with establishment of hollow mesoporous silica nanoprobe (HMSN) which contains Arginine-glycine-aspartate (RGD) peptide (thrombus targeting), perfluoropentane (PFP) (thrombolysis with phase-change and stable cavitation) and indocyanine green (ICG) (thrombolysis with photothermal conversion). HMSN is used as the carrier, the surface is coupled with targeted RGD to achieve high targeting and permeability of thrombus, PFP and ICG are loaded to achieve the collaborative diagnosis and treatment of thrombus by US and NIR, so as to provide a new strategy for the integration of diagnosis and treatment of arterial thrombus. From the in vitro and in vivo evaluation, RGD/ICG/PFP@HMSN can aggregate and penetrate at the site of thrombus, and finally establish the dual-mode directional development and thrombolytic treatment under the synergistic effect of US and NIR, providing strong technical support for the accurate diagnosis and treatment of arterial thrombosis. Graphical Abstract
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Small Methods
·
2025
·
IF 9.1
Yaning Luo,Sheng Wang,Wenqiang Li,Xu Cao,Chengxi Zhang,Jun Dai,Lin Wang,Xuyong Yang
Metal halide perovskite nanocrystals (PeNCs) have emerged as promising materials for next-generation light-emitting diodes (PeLEDs) due to their outstanding optical properties. However, synthesis challenges such as rapid crystallization often introduce defects that degrade device performance. Herein, a dual-ligand approach employing trioctylphosphine oxide (TOPO) and phenylphosphinic acid (PPIA) is introduced to coordinate Pb 2 ⁺ ions, effectively slowing the crystallization process and minimizing defect formation. The obtained PeNCs exhibit a high photoluminescence quantum yield (PL QY) of 93%. Additionally, the PPIA ligand enhances electrical conductivity via π-electron resonance, enabling more efficient charge transport in FAPbBr 3 films. As a result, the optimized PeLEDs achieve a peak external quantum efficiency (EQE) of 24.2% and a luminance of 32 840 cd m − 2 , significantly outperforming the control devices, which exhibit an EQE of 12.1% and a luminance of 1577 cd m − 2 . Furthermore, the operational lifetime of the optimized PeLEDs is 5.3 times longer than that of the control devices. These findings offer a promising pathway for advancing the performance and stability of PeLEDs.
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ACTA PHYSIOLOGIAE PLANTARUM
·
2024
·Vol. 46
·期 3
·1-11
·
IF 2.4
Wu Wenqing,Li Simeng,Gu Wei,Tian Rong,Luo Man,Tang Junjie,Tang Min,Wu Yinzhi
Alismatis rhizoma is an essential medicine in clinical practice. Asian water plantain ( Alisma orientale (Sam.) Juzep) is one of the original plants of Alismatis rhizoma. Previous studies have identified the optimal light intensity range for the growth and development of A. orientale , but the mechanism by which light intensity affects the accumulation of secondary metabolites of A. orientale is unknown. The aim of this study was to investigate the effect of light intensity on the accumulation of triterpenoids in A. orientale saplings and its potential molecular mechanism. The dry weight and contents of total triterpenes and indicative components (alisol B 23-acetate and alisol C 23-acetate) as well as the expression of key enzyme genes in the triterpene biosynthesis pathway under different light intensities (50–600 μmol m −2 ·s −1 ) were determined. The results showed that the accumulation of dry matter and the contents of total triterpenes, alisol B 23-acetate, and alisol C 23-acetate increase first and then decrease with increasing light intensity, with the maximum values of 31.65 g, 18.35 mg·g −1 , 1.91 mg·g −1 , and 0.13 mg·g −1 recorded at light intensities of 400, 200, and both of 300 μmol m −2 ·s −1 , respectively. Light intensities of 200–400 μmol m −2 ·s −1 promote the expressions of key enzyme genes and the accumulation of total triterpenes significantly. Correlation analysis showed that the expression levels of key enzyme genes are significantly correlated with total triterpene and indicative component contents, and these correlations are strongest under moderate light intensities. Overall, our results reveal that a moderate light intensity of 200–400 μmol m −2 ·s −1 is beneficial for the growth and synthesis of protostane triterpenes in A. orientale seedlings, and that its probable mechanism involves the upregulated expression of enzymes that are key in the synthesis of triterpenoid ingredients. This study clarified the suitable light intensity range for the synthesis and accumulation of protostane triterpenes of A. orientale , which provided scientific basis for the production of high-quality superior forms of A. orientale .
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Cheng Qin,Yumeng Qi,Qing Zheng,Xiaolei Teng,Ahmed A. Allam,Ahmed Rady,Zunyao Wang,Ruijuan Qu
In this study, we conducted a systematic study of bisphenol AF (BPAF) removal by visible light coupled zero valent iron activated persulfate (Vis/Fe 0 /PS) system. The results showed that in Fe 0 /PS system, the removal rate of BPAF increased by 46.4% with the addition of Vis. New mechanisms were proposed: that PS became excited under Vis irradiation, which favored its reaction with Fe 2+ to produce more free radicals. Moreover, Fe 3+ could form complex with mono-hydroxylated and mono-carboxylated intermediate of BPAF, and the photoinduced ligand-metal charge transfer (LMCT) process could effectively transfer the charge to the metal ion, accelerating the reduction of Fe 3+ to Fe 2+ to enhance the generation of free radicals. The generation of hydroxylation products of bisphenol AF in the Vis/Fe 0 /PS system was greatly increased compared to the Fe 0 /PS system. The Vis/Fe 0 /PS system had a great application prospect, as it reduced the economic cost of treating bisphenol AF by at least 49.5% compared to other methods. Moreover, 99.6% of bisphenol AF was degraded after 45 min of reaction under natural light. Findings of this study provides new insights into the synergistic role of Vis in Fe 0 /PS systems and may advance the practical application of Vis/Fe 0 /PS system in water and wastewater treatment.
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THIN SOLID FILMS
·
2024
·
IF 2
Tiebiao Qiu,Xin Jin,Lina Wang,Ting Lei,Guohao Bo,Jian Zhang
Sb 2 S 3 has garnered significant attention in photovoltaic applications due to its suitable bandgap, single stable orthogonal phase and excellent stability. However, due to the coexistence of indirect transition parts in the bandgap, a thicker Sb 2 S 3 absorption layer is usually required to achieve decent light absorption in solar cells, which inevitably leads to an increase in trapped states in the bulk. Therefore, it is of great importance to realize more photogenerated carriers without increasing charge recombination. Here, we realized the in-situ growth of high-quality Sb 2 S 3 micropillar arrays on the template prepared by laser direct writing. Compared with the traditional thick layer, this array structure with less material usage can not only achieve more light absorption by enhancing photon scattering, but also optimize carrier transport at the interface by expanding their contact area with the hole transporting layer. This work provides a strategy for controllably achieving enhanced light absorption of Sb 2 S 3 structures, which is a perspective for the improvement of highly efficient solar cells.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Rongrong Hu,Wenfang Peng,Lin Cheng,Qiaoyun Wu,Gaolei Dong,Pan Liang,Bobo Yang,Yuefeng Li,Jun Zou,Donghai Feng
Metal halide perovskite nanocrystals (NCs) are emerging for emitting applications due to their high photoluminescence (PL) quantum yield and wide PL wavelength tunability. Here, the light-induced PL enhancement in complexes of CsPbBr3 NCs and 1-octanethiol (OT) molecules (refers to below as NC–OT complexes) is investigated. In comparison with that of as-grown CsPbBr3 NCs, the PL intensity of NC–OT complexes is lower before light illumination. While after ultraviolet light illumination, the PL performance of NC–OT complexes is improved in both air and nitrogen atmospheres. Compared with air atmospheres, anaerobic atmospheres are more effective at increasing the PL intensity because of eliminating photo-oxidation. The light illumination prevents the nonradiative process and enhances the radiative emission in NC–OT complexes, supported by transient PL and photobleaching measurements, due to better surface passivation through thiol–ene reactions. The light-induced PL enhancement in NC–OT complexes provides valuable information for the applications of perovskite nanomaterial-based emitting devices.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Baoting Tan,Jia Yan,Xujie Cao,Zhilong Song
Environmental pollution, particularly from printing and dyeing wastewater, has become an increasingly critical issue due to its persistence and resistance to conventional treatment methods. Photocatalytic technology, which efficiently harnesses solar energy, offers a promising solution by minimizing secondary pollution. Tungsten trioxide (WO 3 ), a visible-light-responsive N-type semiconductor, has garnered attention due to its strong photocurrent signal and high photosensitivity. However, the rapid recombination of photogenerated electron-hole pairs limits its photocatalytic efficiency. To address this, we have enhanced the photocatalytic performance of WO 3 by forming a composite with carbon nitride (CN), creating a Z-type heterojunction (CN/WO 3 ). The Z-scheme heterojunction facilitates efficient charge carrier separation, which significantly improves the photocatalytic activity under visible light irradiation. The optimized CN/WO 3 composites enable an apparent rate constant of 0.021 min −1 for rhodamine B (RhB) degradation under visible light irradiation, which is 7.8 and 10.5 times greater than that of CN (0.0027 min −1 ) and WO 3 (0.0020 min −1 ), respectively. The efficient charge separation and extended visible light absorption make CN/WO 3 composites a promising material for large-scale environmental remediation, offering a cost-effective and scalable approach to organic pollutant degradation.
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