ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Chen Sun,Hao Lu,Cheng-Yang Yue,Honghan Fei,Shaofan Wu,Shuaihua Wang,Xiao-Wu Lei
Rewritable luminescent paper is particularly crucial, considering the ultrahigh paper consumption and confidential information security, but a highly desirable stimuli-responsive smart luminescent material with excellent water solubility has rarely been studied. Herein, a new type of rewritable paper made by highly efficient green light emissive zero-dimensional (0D) organic manganese halides is rationally designed by virtue of the reversible photoluminescence (PL) off–on switching. Specifically, the green emission can be linearly quenched by water vapor in a wide humidity range and again recovered in a dry atmosphere, which make it a smart hydrochromic PL off–on switching and humidity sensor. Benefiting from the reversible luminescence off–on switch and excellent water solubility, rewritable luminescent paper is realized through water-jet security printing technology on 0D halide-coated commercial paper with high resolution. The printed/written information can be easily cleaned by slight heating with outstanding “write–erase–write” cycle capabilities. In addition, multiple light source-induced coincident green light emissions further provide convenience to realize anti-counterfeiting, encryption and decryption of confidential information, and so forth. This work highlights the superiority of dynamic ionic-bonded 0D organic manganese halides as reversible PL switching materials in rewritable luminescent paper, high-security-level information printing, storage and protection technologies, and so forth.
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高影响因子
Journal of Nano Research
·
2021
·
IF 2.929
Bi Quan Su,Yinxia feng,Liang Xian,Li Sheng,Qi Qi Li
Photochemistry to prepare platinum nanoparticles (Pt NPs) is an essential way to control Pt NPs catalyst size distribution. This article reports a series of morphologically controlled syntheses of Pt NPs loaded on modified carbon nanotube (Pt-CNTs). In the synthesis, Polyethylene glycol (PEG) participates in reactions both as a reducing agent and a stabilizer. Visible light irradiation was adopted as a kinetic controlling approach. Typical 4-nitrophenol (4-NP) reduction was adopted to probe the catalytic performances. Characterizations prove that visible light irradiation is an effective way to control the reaction process. In the optimized reaction conditions, i.e., when the ratio PEG:H2O is 1:9, and the pH is 10, the as-prepared Pt NPs are consequently in a very narrow sized distribution with an average diameter of 1.29 nm. The Pt-CNTs present a high reaction rate constant of 0.624 min-1 in the catalytic reduction of 4-NP. All the research results are beneficial for exploring more green chemistry and facile photochemical approaches in the controlled preparation of Pt nanocatalysts.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Ruiting Zhang,Yahong Jin,Chuanlong Wang,Haoyi Wu,Li Chen,Yihua Hu
The ultraviolet (UV) light detection has important applications in photochemistry, material aging , plant cultivation, and integrated circuit lithography. And photochromic materials have attracted more and more attention in technological applications due to their different physical and chemical properties before and after irradiation with a specific excitation light source. Therefore, it is a very interesting work to realize the detection of ultraviolet light intensity based on photochromic materials with good response to ultraviolet light. Here, we design a dual excitation detection mode based on the inorganic photochromic material SrHfO 3 : Ho 3+ , and propose a simple and high-precision UV intensity detection method. The doping of Ho 3+ ions optimizes the photochromic effect of the SrHfO 3 host material and also enables the material to integrate the up-conversion and the downshifting luminescence modes. Different luminescence quenching degrees appear in response to photochromic effect between up-conversion and the downshifting luminescence modes, thereby constructing a dual excitation mode for high-precision UV light intensity detection. In addition, flexible films and 3D micro-rod arrays using the as-obtained photochromic material were designed and fabricated a photochromism platform toward the implementation of optical information storage. This work not only provides a photochromic platform for optical data storage, but also opens a way for simplification of UV intensity detection with high accuracy.
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高影响因子
CATALYSIS TODAY
·
2018
·
IF 4.667
Shuanglong Ma,Sihui Zhan,Yuguo Xia,Pengfei Wang,Qianlei Hou,Qixing Zhou
The Ag/ZnO/g-C 3 N 4 composite photocatalyst, which was synthesized by thermal polymerization of a melamine precursor combined with solvothermal reaction, was used as a visible-light-driven biocide toward Escherichia coli ( E. coli ). The Ag/ZnO/g-C 3 N 4 composite displayed considerably increased visible-light-driven bactericidal activity compared to g-C 3 N 4 , Ag/g-C 3 N 4 , and ZnO/g-C 3 N 4 powders. The photocatalytic destruction of E. coli cells was verified by fluorescence-based cell live/dead analysis and SEM. The mechanism of increased bactericidal effect was studied by UV–vis diffuse reflectance spectroscopy, photoluminescence spectroscopy, photocurrent response, and electrochemical impedance spectroscopy (EIS). The enhanced photocatalytic bactericidal effect was attributed to the matching conduction band levels of g-C 3 N 4 and ZnO and the surface plasmon resonance (SPR) effect of Ag nanoparticles, which resulted in enhanced adsorption of visible light, reduced recombination of free charges, and rapid separation and transportation of photogenerated electrons-holes. The disinfection mechanism was investigated using different chemical scavengers and electron spin-resonance spectroscopy (ESR), and indicating the important role of h + and H 2 O 2 . Furthermore, taking into account the bulk availability and better bactericidal effect of Ag/ZnO/g-C 3 N 4 , this work provides a new pathway to develop advanced materials for water disinfection.
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高影响因子
Science China-Materials
·
2024
·Vol. 67
·期 3
·954-964
·
IF 6.8
Chen Jiayue,Cao Meilian,Yue Yiying
The high-value utilization of lignin meets the demand for the reclamation of wastes and is of great significance for achieving carbon neutrality. However, lignin is unstable and prone to melting and deformation at high temperatures, requiring a long period of stabilization. The carbon nanofiber (CNF) membrane prepared by electrospinning has advantages such as high aspect ratio, low density, good light absorption, and a large number of pores favorable for steam transportation. Based on co-electrospinning, a lignin-based CNF membrane material was prepared in this work. The preparation process of this material can not only save the stabilization time of lignin-based nanofibers but also improves the hydrophilicity and light absorbance of the membrane through zinc chloride activation and the addition of pore-forming agents (terephthalic acid and polymethyl methacrylate). As a photothermal layer of an interfacial solar evaporation system, the membrane has a light absorption of 94.3% over the whole sun spectrum. Furthermore, the interfacial solar evaporation system with the prepared CNF membrane as the photothermal layer has an evaporation rate of 1.43 kg m −2 h −1 under one sun, with an evaporation efficiency of 93.8%. In addition, the evaporator has good circulation and salt resistance ability. After 15 h of continuous illumination, it still maintains excellent evaporation rate. This type of CNF membrane with lignin as the main carbon source has great potential as a photothermal conversion material in future desalination applications.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 11
·16795-16804
·
IF 0
Li Haiyu,Xu Mingze,Zhang Tingsong
The issue of water pollution has emerged as a formidable challenge, prompting a pressing need for solutions. The utilization of metal nanoparticles with surface plasmon resonance and semiconductor composite photocatalysts is regarded as a highly effective approach to solve this problem. g-C 3 N 4 is an effective catalyst for the degradation of organic pollutants. Its photocatalytic performance is usually enhanced by the use of the noble metal Au Ag. However, the high cost of these materials limits their application. In this study, we present the synthesis of Al NPs/g-C 3 N 4 nanocomposites using the bridging effect of ligands. The characterized of transmission electron microscopy (TEM), X-ray diffractometer (XRD) and ultraviolet-visible spectroscopy (UV-Vis) proved that Al NPs/g-C 3 N 4 with a wider light absorption range were successfully synthesized. The effects of ligands, (glutathione (GSH), glutamic acid (GAG), and cysteine (CYS)), Al diameter (40 to 200 nm) and the ratio of Al to g-C 3 N 4 (1:1 to 5:1) on the photocatalytic degradation of methylene blue (MB) by Al NPs/g-C 3 N 4 were also evaluated. The results showed that the optimum degradation efficiency of Al NPs/g-C 3 N 4 for MB at 5 mg/L reached 100% within 60 min, which was 11 times higher than that of pure g-C 3 N 4 . The principal analysis of Al enhancing the photocatalytic performance of g-C 3 N 4 was studied through transient photocurrent spectroscopy (TPC), electrochemical impedance spectroscopy (EIS), and steady-state transient fluorescence spectroscopy (PL). The results confirmed that hot carriers generated by localized surface plasmon resonance (LSPR) of Al nanoparticles increase the carrier concentration. In addition, the Schottky barrier generated by Al and g-C 3 N 4 could also improve the carrier separation rate and increase the carrier lifetime. This work is expected to solve the problem of organic wastewater treatment and lay the foundation for subsequent research on photocatalysis. Graphical abstract
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JOURNAL OF HAZARDOUS MATERIALS
·
2018
·
IF 6.434
Lei He,Yanan Dong,Yane Zheng,Qingming Jia,Shaoyun Shan,Yaqin Zhang
A novel magnetic MIL-101(Fe)/TiO 2 composite was synthesized for photo degradation of tetracycline (TC) under solar light. The composite was characterized by XRD, TGA, SEM, TEM, EDS, BET, FTIR, XPS, VSM, ESR, and PL. The resultant composite was environment friendly material, which exhibited high TC degradation efficiency and excellent reusability. In the meantime, it could be separated easily from TC solution by using magnet, which would save significant time and cost of preparation and degradation, having broad prospect in application. Using 1 g L −1 magnetic MIL-101(Fe)/TiO 2 at pH = 7, 92.76% degradation efficiency was achieved under solar light irradiation in 10 min for 20 mg L −1 TC. Further experiments indicated that TiO 2 introduced in the composite played an important role in the degradation process, which could be activated by the UV light in solar light to generate large amount of O 2 − and OH radicals. The degradation efficiency of TC in this paper was significantly higher than other research papers reported in last three years. This study put forward new magnetic Fe-based metal-organic frameworks (MOFs)/TiO 2 composite for degrading pharmaceutical wastewater.
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高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 12
·3617-3622
·
IF 6.641
Mingcai Li,Xuejie Zhang,Haoran Zhang,Weibin Chen,Li Ma,Xiaojun Wang,Yingliang Liu,Bingfu Lei
At present, blue-red composite LED light sources used for plant lighting are mainly composed of blue light and red light; the blue light is provided by gallium nitride LED chips, but the full-width at half-maximum (FWHW) is only approximately 25 nm, while the blue light required by plants for photosynthesis is wider. Focusing on this problem, this work reported that a dual emitting phosphor-in-glass plate (Dual-PiGP) was prepared towards a high power and dual broadband emitter, in which BaMgAl10O17:Eu2+ (BAM) and CaAlSiN3:Eu2+ (CASN) provide blue and red emission, respectively. Dual-PiGP exhibited several merits, including a high quantum efficiency of 93.90%, a superior thermal stability (80.1%@150 °C of the peak intensity at 25 °C), and a dual broad spectrum with a full-width at half-maximum (FWHM) of 50 and 106 nm at 446 and 645 nm, respectively. Moreover, a proof-of-concept Dual-PiGP plant lamp for application in indoor plant factories was successfully fabricated with Dual-PiGP and a 385 nm emitting LED chip, yielding blue- (400–500 nm) and red-light (580–780 nm) emission that matches well with the absorption spectrum of chlorophyll. The Dual-PiGP plant lamps were applied indoors to cultivate Italian lettuce, and commercial plant lamps assembled by LED chips were chosen as reference. The cultivation results indicated that the biomass of Italian lettuce was 12.12% greater than those cultivated using commercial plant lamps. Further analysis also certificated that the content of soluble protein and total chlorophyll were also improved. The Dual-PiGP light converter strategy provides an option for next-generation plant growth LEDs.
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高影响因子
Scientific Reports
·
2015
·Vol. 5
·期 1
·12005
·
IF 5.578
Cui Yan-Li,Guo Xiao-Ning,Wang Ying-Yong,Guo Xiang-Yun
N-aryl imidazoles play an important role as structural and functional units in many natural products and biologically active compounds. Herein, we report a photocatalytic route for the C-N cross-coupling reactions over a Cu/graphene catalyst, which can effectively catalyze N-arylation of imidazole and phenylboronic acid and achieve a turnover frequency of 25.4 h −1 at 25 o C and the irradiation of visible light. The enhanced catalytic activity of the Cu/graphene under the light irradiation results from the localized surface plasmon resonance of copper nanoparticles. The Cu/graphene photocatalyst has a general applicability for photocatalytic C-N, C-O and C-S cross-coupling of arylboronic acids with imidazoles, phenols and thiophenols. This study provides a green photocatalytic route for the production of N-aryl imidazoles.
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高影响因子
Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 17
·4683-4690
·
IF 5.976
Bingyan Zhu,Wenyu Ji,Zongquan Duan,Yang Sheng,Ting Wang,Qilin Yuan,Han Zhang,Xiaosheng Tang,Hanzhuang Zhang
During the last three decades, there has been significant development of quantum dot light emitting diodes (QLEDs) due to their widespread applications. However, common QLEDs depend on cadmium, which is toxic and limits their all-inclusive applications. To address this challenge, herein, we report a highly efficient and low turn-on voltage Cd-free inverted QLEDs with eco-friendly Zn–Ag–In–S quantum dots as the emissive layers. The device performance is closely related to the properties of the hole transport layer (HTL), which are explored by employing different hole transport materials, namely, 4,4′,4′′-tris(carbazol-9-yl) triphenylamine (TCTA) and N,N′-bis(naphthalen-1-yl)-N,N′ bis(phenyl)-benzidine (NPB). Although the energy levels of the lowest unoccupied molecular orbitals (LUMO) of TCTA and NPB are similar, electron leakage from the QDs to NPB is observed, which deteriorates the device performance. An excellent QLED can be achieved if a thick TCTA layer is introduced next to the QDs. Additionally, the QLED with a stepwise HTL consisting of TCTA/NPB presents a slightly higher current efficiency than the TCTA-only device, revealing that the reduction in holes accumulated at the QDs/HTL interface is beneficial for enhancing the device efficiency. Compared to the previously reported Zn–Ag–In–S based QLEDs, our device exhibits a low turn-on voltage of 2.2 V and the highest luminance (over 2000 cd m−2) and efficiency (larger than 2.1 cd A−1).
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高影响因子
Heliyon
·
2023
·
IF 4
Shengxuan Wang,Hao Cui,Sijia Jin,Xiaodong Pi,Haiyan He,Chunhui Shou,Deren Yang,Lei Wang
The textured surfaces to reduce light reflectivity by using acid-alkali chemical etching and SiN x films are generally necessary for commercial crystalline silicon solar cells. However, this etching process requires a large amount of environmentally harmful acid-alkali solution and has limited options for texture and size. To overcome these disadvantages, a new anti-reflection strategy is proposed in this study, which is using soft nanoimprint lithography to prepare the textured structures on the outside of the SiN x films. The polyurethane with a high refractive index of 1.64 is selected as the texture material, and different templates are selected to prepare it into different light trapping structures, including positive-inverted pyramids, inverted lace cones, and positive-inverted moth-eye nanostructures allowing for easy customization of the textured structures. The finite element simulation and experiments demonstrate that these light trapping structures have a wide spectrum anti-reflection performance in visible and near-infrared bands. With the back surface of the commercial passivated emitter rear contact (PERC) bi-facial solar cells as the imprint substrates, some light trapping structures can reduce the surface weighted average light reflectivity (R w ) at the band of 300–1200 nm from 18.31% to less than 10% and the optimal structures can reduce R w to 8.71%. This anti-reflection strategy can also be applied to thin-film solar cells and crystalline silicon solar cells of other structures, such as HIT, Topcon, Perovskite/c-Si tandem, and so forth, which shows great development potential.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jinxing Yu,Peiyi Yan,Feng Chen,Shu Jin,Xiaoxiang Xu,Jun Qian
Semiconductor-based photocatalytic techniques provide a durable and environmentally benign route to disinfect microbes. However, their disinfection activities are often limited by inadequate use of photocarriers (e − and h + ), particularly for narrow bandgap semiconductors. Here, we directly grow narrow bandgap semiconductor MgIn 2 S 4 onto In 2 O 3 to fabricate MgIn 2 S 4 @In 2 O 3 hierarchical tubular heterostructures. Using the model microbes Escherichia coli bacteria, we demonstrate that MgIn 2 S 4 @In 2 O 3 can achieve an exceptionally high antimicrobial activity (7 log reduction in viable cells count for 30 min illumination) although MgIn 2 S 4 and In 2 O 3 alone are almost inactive. Owing to the intimate contact between MgIn 2 S 4 and In 2 O 3 , MgIn 2 S 4 @In 2 O 3 enables efficient photocarrier separation which supports continuous production of copious reactive species ( i.e. h + and O 2 − ) for disinfection. Numerical simulation indicates that photocarriers are spatially well-separated in MgIn 2 S 4 @In 2 O 3 due to the type-II heterojunction formed. These findings signify the possibility to achieve high antimicrobial activity from otherwise almost inactive semiconductors by properly constructing the heterogeneous interfaces.
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高影响因子
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