ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yue Tian,Ying Li,Chuqiao Hu,Yaqian Yang,Di Chen,Guozhen Shen
Weak-light detection technology is widely used in various fields, including industry, high-energy physics, precision analysis, and reflection imaging. Metal–semiconductor–metal (MSM) photodetectors demonstrate high detectivity and high response speed and are one of the suitable structures for the preparation of weak-light detectors. However, traditional MSM photodetectors tend to exhibit high dark currents, which are not conducive to performance improvement. Here, a MXene–Cs3Bi2I9–MXene weak-light detector is proposed. Based on the MXene–Cs3Bi2I9 Schottky junctions, the dark current is reduced by 2 orders of magnitude and the responsivity is significantly improved compared with the traditional Cr/Au–Cs3Bi2I9–Cr/Au MSM photodetector. The device demonstrates excellent photodetection capacity with a photoresponsivity of 6.45 A W–1, a specific detectivity of 9.45 × 1011 Jones, and a fast response speed of 0.27/2.32 ms. Especially, the device yielded a superior weak-light detectable limit of 10.66 nW cm–2 and demonstrated excellent optical communication capability. Moreover, such a flexible device shows little degradation in photodetection performance after extreme bending for 4500 cycles, proving remarkable bending endurance and flexibility. The obtained results highlight the great potential of such Cs3Bi2I9/MXene devices as a stable and environmentally friendly candidate for weak-light detection.
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高影响因子
LANGMUIR
·
2023
·
IF 3.9
Zhilin Li,Qiaoqiao Li,Mengyan Cao,Zhihui Rao,Xinyu Shi,Liujiang Zhou,Xiujian Zhao,Xiao Gong
Low-dimension perovskite materials have attracted wide attention due to their excellent optical properties and stability. Herein, Sb3+-doped Cs2ZrCl6 crystals are synthesized by a coprecipitation method in which Sb3+ ions partially replace Zr4+ ions. The Cs2ZrCl6:xSb3+ powder shows blue and orange–red emissions under a 254 and 365 nm light, respectively, due to the [ZrCl6]2– octahedron and [SbCl6]3– octahedron. The photoluminescence quantum yield (PLQY) of Cs2ZrCl6:xSb3+ (x = 0.1) crystals is up to 52.5%. According to experimental and computational results, the emission mechanism of the Cs2ZrCl6:xSb3+ crystals is proposed. On the one hand, a wide blue emission with a large Stokes shift is caused by the self-trapping excitons of [ZrCl6]2– octahedra under a 260 nm excitation. On the other hand, the luminescence mechanism of [SbCl6]3– octahedron is divided into two parts: 1P1 → 1S0 (490 nm) and 3P1 → 1S0 (625 nm). The broad-band emission, high PLQY, and excellent stability endow the Cs2ZrCl6:xSb3+ powders with the potential for the fabrication of white light-emitting diodes (WLEDs). A WLED device is fabricated using a commercial 310 nm NUV chip, which shows a high color rendering index of 89.7 and a correlated color temperature of 5333 K. In addition, the synthesized Cs2ZrCl6:xSb3+ crystals can be also successfully used for information encryption. Our work will provide a deep understanding of the photophysical properties of Sb3+-doped perovskites and facilitate the development of Cs2ZrCl6:xSb3+ crystals in encrypting multilevel optical codes and WLEDs.
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JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
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2023
·
IF 3.6
Chuang Liu,Ziyang Liu,Jie Wang,Yanjie Bai,Xun Sun,Qiang Yang,Xinlong Ma,Huan Zhou,Lei Yang
Efficient hemorrhage control of severe wound injuries is an urgent medical need, deserving agents with promising blood coagulation and biocompatible characteristics. Current work developed polydopamine (PDA) functionalized porous starch powder (PS-PDA) for emergency bleeding treatment. The micro-morphology and elements, chemical groups, and porosity of PS-PDA were systematically characterized. Its comparison with porous starch (PS) revealed the promising potential of this composite in medical practice. On one hand, PS-PDA showed superior surface area and biomineralization affinity over PS, along with comparable hemo/cyto-compatibility. On the other hand, the photothermal effect of PDA under near Infrared (NIR) light paved the possibility to accelerate blood coagulation in situ. In vivo studies indicated PS-PDA can significantly reduce blood loss and improvement of hemostasis efficiency accompanied by NIR light exposure. These results suggest that this newly developed PS-PDA powder can serve as a promising hemostatic material for bleeding wound control.
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高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Yuanyuan Wang,Lang Du,Xuemin Hu,Wenyan Zhang,Lingyun Hao,Kaining Ding,Hangmin Guan,Yingfei Hu
2,2′,4,4′-tetrabromodiphenyl ether (BDE-47) is a highly toxic organic pollutant. Owing to the high structural stability, BDE-47 is difficult to be naturally decomposed. In this study, Au nanoparticles decorated flower-like ZnIn 2 S 4 microspheres were successfully fabricated and applied for the rapid removal of BDE-47 driven by visible-light irradiation. It was revealed that 3 wt% Au-loaded ZnIn 2 S 4 (Au/ZnIn 2 S 4 ) has the highest removal rate for BDE-47 (0.90118 h −1 ). A study of the reaction path and mechanism shows that the bromine adjacent to the oxygen atom in BDE-47 tends to be removed via electron transfer. This is attributed to the band-gap excitation of ZnIn 2 S 4 , the surface plasmon resonance effect of the Au nanoparticles, and the Schottky junctions between them. Furthermore, density functional theory calculations show that the strong affinity between Au 0 and the bromine atom adjacent to the oxygen atom in BDE-47 can lengthen the carbon–bromine bond and further weaken the bond upon the accumulation of electrons. This may be the main reason for the rapid debromination of BDE-47. This study provides a new perspective on the photocatalytic removal of moderately brominated polybrominated diphenyl ethers.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Wenhao Sun,Hongrui Cheng,Jing Zhang,Xiao Fang,Wenkai Chen,Jiefang Zhu,Yuanhui Zheng
The direct hybridization of Pt and g-C 3 N 4 generally forms a Schottky barrier between the two components, which unavoidably hinders the migration of photogenerated electrons from g-C 3 N 4 to the Pt cocatalyst. Herein, we report the first efficient allochroic Pt/g-C 3 N 4 photocatalyst that can form an ohmic contact through photoconversion of semiconducting g-C 3 N 4 to metalloid, accompanied with the charge carrier storage and photocatalyst color change, which is proved experimentally and theoretically. Through intermittent exposure of Pt/g-C 3 N 4 photocatalyst to air for a few minutes during photocatalysis, the photocatalyst shows the highest hydrogen evolution performances. The ohmic contacts greatly promote the electron transfer from the semiconducting g-C 3 N 4 to the Pt cocatalyst driven by the built-in electric field. In addition, the mechanism for the photocatalyst deactivation and activation is presented. The compositional tuning of the allochroic g-C 3 N 4 through light irradiation and exposure to air can control over the photocatalytic activity and long-term stability for hydrogen evolution. This report for the first time unveils the deactivation and regeneration mechanisms of SCN.
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Nanomaterials
·
2023
·Vol. 13
·期 7
·1221
·
IF 5.3
Chen Jiang,Meiyan Wu,Fang Zhang,Chao Liu,Mingliang Sun,Bin Li
Tunicate nanocellulose with its unique properties, such as excellent mechanical strength, high crystallinity, and good biodegradability, has potential to be used for the preparation of light management film with tunable transmittance and haze. Herein, we prepared a whole tunicate cellulose film with tunable haze levels, by mixing tunicate microfibrillated cellulose (MFC) and tunicate cellulose nanofibrils (CNF). Then, the obtained whole tunicate cellulose film with updated light management was used to modify the organic solar cell (OSC) substrate, aiming to improve the light utilization efficiency of OSC. Results showed that the dosage of MFC based on the weight of CNF was an important factor to adjust the haze and light transmittance of the prepared cellulose film. When the dosage of MFC was 3 wt.%, the haze of the obtained film increased 74.2% compared to the pure CNF film (39.2%). Moreover, the optimized tunicate cellulose film exhibited excellent mechanical properties (e.g., tensile strength of 168 MPa, toughness of 5.7 MJ/m3) and high thermal stability, which will be beneficial to the workability and durability of OSC. More interestingly, we applied the obtained whole tunicate cellulose film with a high haze (68.3%) and high light transmittance (85.0%) as an additional layer to be adhered to the glass substrate of OSC, and a notable improvement (6.5%) of the power conversion efficiency was achieved. With the use of biodegradable tunicate cellulose, this work provides a simple strategy to enhance light management of the transparent substrate of OSC for improving power conversion efficiency.Keywords:cellulose composite films;cellulose nanofibrils;micro-fibrillated cellulose;tunicate;organic solar cells
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 11
·1-13
·
IF 2.8
Liu Jinsong,Sun Zhongbao,Wu Zhengying,Huang Yanfang,Zhu Kongjun,Zheng Hongjuan,Wang Jie,Chen Jiankang
AgBr/Bi 2 SiO 5 photocatalyst with Z-scheme structure was obtained via a hydrothermal reaction, calcination, and in situ precipitation process. The as-prepared AgBr/Bi 2 SiO 5 composite photocatalytically degraded 96.2% of RhB under visible light irradiation within 30 min. Moreover, the photodegradation efficiency remained above 81.7% after being reused five times. Trapping experiments revealed that ·O 2− was the main reactive species during RhB photodegradation. The degradation mechanism study of AgBr/Bi 2 SiO 5 showed that the Z-scheme structure between AgBr and Bi 2 SiO 5 facilitated the separation of charge carriers, thereby improving the photocatalytic degradation with the assistance of a dye sensitization effect. This work provides a reference for developing other Z-scheme photocatalysts for the removal of organic pollutants.
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CHEMOSPHERE
·
2023
·
IF 8.8
Litao Jia,Chenjia Yang,Xiaoyong Jin,Dan Wang,Fanghua Li
A hot research topic in visible-light-driven photoelectrocatalytic (PEC) oxidation technology is the development of superior photoanode materials. The design of the photoanode system with a direct Z-scheme charge transfer mechanism is crucial to achieving effective charge separation for sustainable photoelectrocatalysis. Here, a novel Bi / Bi 2 S 3 /α-MoO 3 heterostructure was successfully assembled by a simple and feasible strategy. The direct Z-scheme heterogeneous formed between Bi 2 S 3 and α-MoO 3 has the advantages of low resistance, high optical response current and the surface plasmon resonance (SPR) effect of Bi nanoparticles (Bi NPs). Thus, the efficiency of photogenerated carrier separation and transfer is further enhanced, and the catalytic activity is significantly improved. It is impressive that the unique photoanode has achieved a maximum removal efficiency of 85.8% of tetracycline (TC) pollutants under visible light irradiation within 60 min and has excellent stability, which is expected to degrade antibiotics efficiently and environmentally in harsh environments. These characteristics give Bi / Bi 2 S 3 /α-MoO 3 promising candidates for practical applications in antibiotic degradation.
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高影响因子
ACS Applied Polymer Materials
·
2023
·
IF 5
Jiashuo Hu,Shuangye Yang,Zihao Chen,Yiping Chen,Jie Wei
In this work, we developed inverse opal photonic crystals (IOPCs) for real-time identifiable labels by tuning the structure color and chemical color under ultraviolet (UV) light and near-infrared (NIR) light. We prepared IOPCs by etching a silica photonic crystal template in thermosensitive hydrogel added to 2,2-diphenyl-2H-naphtho [1,2-b] pyran-6-carbaldehyde (NP). In this way, the transparent hydrogel turned red under UV light due to the photochromic naphthopyran. Meanwhile, the green structure color of IOPCs was superimposed with the red chemical color of the hydrogel, so that IOPCs with naphthopyran (IOPCs/NP) appeared yellow. When irradiated by NIR light, the structure color of IOPCs turned blue from green due to the volume contraction of the thermosensitive hydrogel. When irradiated by UV and NIR light simultaneously, the blue structure color of IOPCs was superimposed with the red chemical color of the hydrogel, and the IOPCs/NP would finally appear purple. Thus, we realized the real-time controllable IOPCs by two light sources. Based on this, we designed a series of identifiable labels with multiple colors under UV and NIR light, which expanded the application of information anticounterfeiting and identification.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Zihan Guan,Yaqiang Wu,Peng Wang,Qianqian Zhang,Zeyan Wang,Zhaoke Zheng,Yuanyuan Liu,Ying Dai,Myung-Hwan Whangbo,Baibiao Huang
A simple and efficient light-assisted method is employed to prepare powder samples of all-inorganic mixed-perovskite CsPbBr 3-x I x from CsPbBr 3 by ion exchange in aqueous HBr/KI solution such that the concentration of I in a sample particle decreases on going from the surface to the interior. CsPbBr 3-x I x /Pt, namely, CsPbBr 3-x I x samples loaded with Pt nanoparticles, shows a high performance for the hydrogen evolution under visible-light irradiation in aqueous HBr solution saturated with CsPbBr 3 . The H 2 evolution rate of the CsPbBr 3-x I x /Pt powders (200 mg) is determined to be 224 μmol h −1 , under 120 mW cm -2 visible-light (λ ≥ 420 nm) illumination. The CsPbBr 3-x I x samples have a high stability, with no apparent decrease in the catalytic activity after 50 h of repeated H 2 evolution experiments. The apparent quantum efficiency of CsPbBr 3-x I x /Pt is determined to be 2.15% under the irradiation of 450 nm light.
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RSC Advances
·
2019
·Vol. 9
·期 2
·721-729
·
IF 3.049
Yu An,Pengwu Zheng,Xiaofei Ma
A novel floating visible-light photocatalyst (HGMs–TiO2/Ag3PO4) composite was prepared using amino modified low-density hollow glass microspheres (HGMs) as carriers to disperse and support TiO2 and Ag3PO4 photocatalysts. The surface morphology, crystal structure and optical properties of the HGMs–TiO2/Ag3PO4 composites were characterized and the Ag3PO4 content on the surface of the microspheres was determined by atomic absorption spectrometry (AAS). Methylene blue (MB) was chose as the organic pollutant to investigate the visible-light catalytic properties of the HGMs–TiO2/Ag3PO4 composites. For HGM composite photocatalysts, when the theoretical mass ratio of TiO2 to Ag3PO4 on the surface of HGMs is 1 : 1.5, the visible-light catalytic activity of the composite is superior to pure Ag3PO4 and a TiO2/Ag3PO4 photocatalyst with a mass ratio of 1 : 1.5 under the same conditions, due to the increased light-contact area and the photocatalytic active sites, since the TiO2 and Ag3PO4 particles can be well dispersed on the surface of the floating HGMs. Furthermore, the deposits of TiO2 and Ag3PO4 on the HGM surface form a heterostructure, facilitating the separation of electron–hole (e− – h+) in the energy band, and elevating the photocatalytic activity and cycle stability of Ag3PO4. This work indicates that floating HGMs–TiO2/Ag3PO4 composites could become a promising photocatalyst for organic dye removal due to the low cost and high visible-light responsiveness.
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高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2019
·
IF 2.722
Jianxin Liu,Fangxia Xie,Rui Li,Tan Li,Zehui Jia,Yunfang Wang,Yawen Wang,Xiaochao Zhang,Caimei Fan
A novel TiO 2-x /Ag 3 PO 4 composite photocatalyst with controllable oxygen vacancies (V o ·) amount was designedly prepared to avoid the photocorrosion and promote reduction capacity of Ag 3 PO 4 photocatalyst. The V o · on TiO 2-x work as molecular oxygen activation center trapping electron and O 2 to form ·O 2 - , and then avoided the electrons combine with h + and/or Ag + . Compared with Ag 3 PO 4 , TiO 2-x , and TiO 2 /Ag 3 PO 4 , TiO 2-x /Ag 3 PO 4 showed obviously efficient visible light and natural indoor weak light photocatalytic activity and stability for the photodegradation of Bisphenol A (BPA). The photoelectric conversion spectra, Ag 3d XPS narrow scan spectra, ESR DMPO-·O 2 - species spectra revealed that the TiO 2-x /Ag 3 PO 4 had a higher photocurrent density, lower photocorrosion and more generation of superoxide radical than those of Ag 3 PO 4 . Interestingly, compare with single h + degradation pathway over Ag 3 PO 4 , the h + and ·O 2 - synergistic degradation pathway over TiO 2-x /Ag 3 PO 4 is more beneficial to the BPA degradation. This work highlights the relations between the photocatalyst structure, active species and pollutant degradation pathway.
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