Photonics Research
·
2023
·Vol. 11
·期 10
·1791-1801
·
IF 7.6
Tianyu Liu,Peng Ran,Yirong Su,Zeng Chen,Renchen Lai,Weidong Shen,Yaoguang Ma,Haiming Zhu,Yang (Michael) Yang
Exciton-polaritons offer the potential to achieve electrically pumped perovskite polariton lasers with much lower current thresholds than conventional photonic lasers. While optically pumped exciton-polaritons have been widely studied in halide perovskites, electrically-pumped polaritons remain limited. In this study, we demonstrate the use of a solution-processing strategy to develop halide perovskite polariton light-emitting diodes (LEDs) that operate at room temperature. The strong coupling of excitons and cavity photons is confirmed through the dispersion relation from angle-resolved reflectivity, with a Rabi splitting energy of 64 meV. Our devices exhibit angle-resolved electroluminescence following the low polariton branch and achieve external quantum efficiencies of 1.7%, 3.85%, and 3.7% for detunings of 1.1, −77, and −128 meV, respectively. We also explore devices with higher efficiency of 5.37% and a narrower spectral bandwidth of 6.5 nm through the optimization of a top emitting electrode. Our work demonstrates, to our knowledge, the first room-temperature perovskite polariton LED with a typical vertical geometry and represents a significant step towards realizing electrically pumped perovskite polariton lasers.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Yahui Zhou,Xiaohua Cheng,Zijian Duan,Xin Liu,Huiyu Yang,Bo Deng
Black TiO 2 microspheres photocatalysts with high light absorption intensity and photosensitive activity were prepared by a simple two-step method of flame-assisted combustion hydrolysis of tetrabutylorthotitanate (TBOT) and NaBH 4 reduction. The black TiO 2 microspheres photocatalysts were characterized by XRD, TEM, XPS, EELS , and UV-Vis absorption spectroscopy . The results show that the reduced TiO 2 exhibits a unique core-shell composite structure with a large number of oxygen vacancies and defects in the outer layer due to Ti 3+ , which effectively reduces the band gap of the photocatalyst. Compared with the commercial P25 catalyst, B-TiO 2 (1:7) showed higher removal of carbamazepine (CBZ) under visible light and its photocatalytic activity was 1.7 times higher than that of P25. This high photocatalytic activity is due to the efficient separation of electron-hole pairs, creating a greater number of active species. B-TiO 2 (1:7) maintained high activity after five repeated cycles and achieved 89.7 % removal of CBZ.
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2023
·
IF 6.2
Jun Yan,Xin Song,Haipeng Wu,Guoqiang Zhang,Huaiguo Xue,Jiefeng Gao
Superhydrophobic and light-responsive actuators (SLRAs) can be driven to move on water surface remotely and in a non-contact manner, and have shown promising applications in soft robotics, environmental protection, etc. It remains a big challenge to develop high performance SLRAs with excellent thermal stability, fast light responsivity and controllable motion. Here, we propose a layer-by-layer vacuum filtration method to prepare flexible, freestanding and superhydrophobic composite films composed of alternately deposited oleylamine modified acid carbon nanotubes (O-ACNTs) and aramid nanofibers (ANFs). The composite film has excellent thermal stability with the maximum weight loss rate temperature as high as 520 ℃. The closely packed structure and strong interlayer interaction ensure the surface stability and durability of the composite film. The composite film possesses excellent photothermal conversion performance, and can maintain the structure integrity without deformation when its surface temperature reaches 208 °C. When used as a self-propelled actuator, the SLRA film can response to the light quickly and move on the water surface, and the motion speed and direction can be controlled by adjusting the irradiation intensity and position. The outstanding thermal stability guarantees the stability and reliability of the self-propelled motions. The present study opens a new avenue to design high performance SLRAs.
✓ 已验证
产品关联
DOI
高影响因子
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
·
2023
·Vol. 649
·期 20
·e202300091
·
IF 1.4
Zhongzhi Wang,Rui Shi,Pengcheng Hao,Xin Qiao,Senchuan Song
In this work, a Eu(TTA) 3 BIP complex with a novel structure was synthesized and characterized. The Eu(TTA) 3 BIP complex has a wide excitation band and can be excited by light in the ultraviolet and blue regions. The characteristic red light of Eu(III) is emitted when the complex is excited. The use of the 2-(Pyrimidin-2-yl)-1H-benzo[d]imidazole (BIP) ligand improved the UV resistance of the complex. Moreover, the blue light reducing film prepared by the Eu(TTA) 3 BIP complex can effectively weaken blue light irradiation. In addition, the Eu(TTA) 3 BIP complex exhibits fluorescence thermal quenching properties. This provides the possibility for temperature sensing.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 15
·1-12
·
IF 2.8
Zhao Wenwu,Zhang Mingming,Li Zihan,Li Shizhuo,Zhang Jiaqi,Liu Jian,Hao Bin,Zhao Lihong,Liu Xiaowen
A new rare earth borate photocatalytic material ErBO 3 has been successfully prepared by hydrothermal method. Due to the particularities of f – f electron transition of Er 3+ ion, ErBO 3 becomes a visible light responsive photocatalytic material. ErBO 3 exhibits certain photodegradation ability to RhB molecules. Then, a series of GO@ErBO 3 composites were prepared by using GO as a co-catalyst. The properties of samples were characterized using XRD, FE-SEM, XPS, FT-IR, Raman, and BET methods. Through detection analysis, it was found that the combination of GO could improve the visible light absorption performance, the specific surface area and the photogenerated carrier separation efficiency of ErBO 3 material, and then the visible light responsive photocatalytic material 0.5 wt%GO@ErBO 3 with excellent performance was obtained. The prepared composite exhibited high degradation performance towards pollutants which affirmed potential the applicability of the proposed degradation system for degrading real industrial effluents.
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Yuyue Huang,Qingjie Xie,Huijuan Wang,Muhammad Imran Nawaz,Huihui Zhang,Shilin Song,Kun Hu,Qiangshun Wu
Trimethoprim (TMP), a kind of emerging pollutant, has attracted considerable attention. To achieve an effective degradation of the TMP, a simulated solar light/periodate (SSL/PI) system was set up by using the Xe lamp as the SSL source. The critical parameters affecting the degradation, including the PI content, the TMP concentration as well as the initial pH, were analyzed. The obtained results show that the TMP removal could reach 92 % after 50 min of treatment under the condition of 4 mM PI addition while lower TMP concentrations showed higher degradation percentages. The efficient TMP degradation in the SSL/PI system was achieved in a wide range of the solution pH. The quenching test proved that IO 3 , IO 4 , 1 O 2 , OH, and O 2 − were critical reactive species for the TMP degradation in the SSL/PI system and the electron spin resonance analysis proved the generation of 1 O 2 and OH. Three possible pathways of the TMP degradation were proposed according to the LC-MS detection and Pathway II might be the specific one according to the density functional theory (DFT) calculation. Toxicity evaluation showed that the toxicity of the initial TMP solution reduced after the treatment, which confirmed the effectiveness of the PI activation by the SSL.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
YuTong Song,TingLin Guo,HaoBo Xue,Xi Hu,Jinbo Bai,Beibei Wang,Shenghua Ma
The scarcity of fresh water resources poses a significant challenge to humanity; therefore, it is necessary to advance the development of a sustainable and highly efficient evaporator. However, the light absorption capability of traditional evaporators is limited to only the top layer, and the single-sided absorption characteristics impose constraints on their efficiency. Herein, we propose a novel method for manufacturing double-sided light absorption evaporators, which mainly includes porous carbon/ceramic nanofilm and graphene upper and lower films as the light absorption layer of the photothermal conversion evaporator, and then the hydrophilic film interlayer transfers water upward. The transmission rate of seawater is affected by the tilt angle at which the evaporator is inserted; therefore, identifying the optimal working angle becomes crucial. Under conditions of inclination angle (15–75°), the evaporation rate of the evaporator with the optimum tilt angle reaches 3.15 kg m–2 h–1. The results of outdoor experiments demonstrate that the double-sided evaporator exhibits an evaporation rate 0.7 kg m–2 h–1 higher than that of the single-sided during noon hours. Furthermore, we simulate the evaporation efficiency of outdoor sunlight at different tilt angles through COMSOL. The design of the double-sided evaporator offers a novel pathway for the future development of high-performance solar-driven evaporators in large-scale applications.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Yanting Tang,Jielin Huang,Shuaifei Liu,Dandan Xiang,Xinqi Ma,Xin Yu,Mingxue Li,Quanhui Guo
Mesocrystals are types of fascinating multifunctional materials in fabricating rapid charge transport pathways, and surface engineering could be considered as a significant influencing factor in boosting charge separation for efficient photocatalytic application. In this work, surface engineered Ta 2 O 5−x mesocrystals were synthesized by facile alkali treatment strategy for enhanced visible light photocatalytic tetracycline degradation. The highly enhanced photocatalytic activity could be attributed to the highly increased surface areas and surface hydroxyl groups to compare with those of commercial Ta 2 O 5 and pristine Ta 2 O 5−x mesocrystals, which could provide more surface reactive sites and high electron density center for trapping photo-generated holes. Besides, possible tetracycline transformation pathways over surface engineered Ta 2 O 5−x mesocrystals and visible light photocatalytic mechanism were also proposed in this work. Current work also provides a facile strategy for regulating surface property of ultrawide bandgaps semiconductors for enhanced visible light photocatalytic performance.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Miao Hu,Aihua Yan,Fan Li,Fei Huang,Ji Huang,Qiaopeng Cui,Xinyang Wang
Heterojunction photocatalysts with intimate contact are very promising for organics photodegradation due to their high efficiency in enhancing the light absorption, inhibiting the carrier recombination and improving the photogenerated electron/hole separation. In this study, we demonstrated a two-step hydrothermal method to construct indium sulfide/bismuth oxybromide (In 2 S 3 /BiOBr) heterojunctions for the first time. Importantly, the optoelectronic dynamics of carrier separation efficiency, charge transport and electron/hole recombination rate were tuned to an optimal domain through a series of experiments. As a result, the photocatalytic activity of In 2 S 3 /BiOBr heterojunctions was greatly enhanced under visible-light irradiation. The as-synthesized IS/BOB-0.2 heterojunctions exhibited the highest photocatalytic ability, which was approximately 4.75 times and 11.26 times higher than that of pure BiOBr and TiO 2 P25 catalysts. This work will provide a better insight into the formation mechanism BiOBr-based Z-scheme heterojunctions with high photocatalytic performance.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2021
·
IF 9.676
Zeming Gu,Jun Qian,Ran Wang,Meilin Lv,Xiaoxiang Xu,Chun Luo
Layered Aurivillius compound Bi 5 Ti 3 CrO 15 has been synthesized by a hydrothermal method for the application as a photocatalyst to liberate hydrogen from water. Bi 5 Ti 3 CrO 15 owns a narrow band gap ( E g ~2.46 eV) and shows stable photocatalytic activity under both full range ( λ ≥250 nm) and visible light illumination ( λ ≥420 nm). A short hydrothermal reaction time is critical to achieve high photocatalytic activity as defects such as Cr 6+ and Bi 5+ can be avoided. An AQE as high as 3.66% at 420 nm ± 20 nm has been recorded, warranting promising application in the field of solar energy conversions. DFT calculation reveals the important role of Cr 3+ cations for visible light sensitivity of Bi 5 Ti 3 CrO 15 .
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2021
·Vol. 28
·期 3
·825-834
·
IF 2.496
Zhang Long,Ge Jianhua,Liu Yujie,Zheng Xuyang,Du Pingwu
Solar-driven reduction of dinitrogen to ammonia remains greatly challenging due to the stable triple bond between N atoms. In this study, g-C 3 N 4 photocatalysts were synthesized via ozone etching method. Due to the O 3 treatment, the resulting photocatalysts were rich in carbon vacancies. Etching g-C 3 N 4 with ozone for two hours (O 3 GCN-2), resulted in the decrease of size, and the structure becoming less compact. The specific surface area of O 3 GCN-2 increased up to ~ 12.751 m 2 ·g −1 , in comparison with that of the bulk g-C 3 N 4 (BGCN) that was only ~ 5.652 m 2 ·g −1 . The nitrogen fixation efficiency of O 3 GCN-2 was 2.72 times higher than that of BGCN under visible light irradiation. UV–vis, electrochemical impedance spectroscopy, and photocurrent measurements showed that O 3 GCN-2 had enhanced visible light absorption properties and enhanced electron–hole separation efficiency. The possible mechanism of the photocatalytic nitrogen fixation was also investigated. This study may provide a novel idea and insight for the design of efficient photocatalysts for nitrogen fixation.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Zhaohui Wu,Jie Shen,Nan Ma,Zhongfu Li,Min Wu,Difa Xu,Shiying Zhang,Wenhui Feng,Yongfa Zhu
Enhancing spatial charge separation efficiency through directional charge transfer is one of the vital strategies to improve the photocatalytic performances. Bi 4 O 5 Br 2 nanosheets with vertical aligned (11−3), (32−2), and (112) facets were constructed to achieve the efficient directional charge transfer and separation based on the distinctive electronic and band structures of different facets. That is, the photoexcited electrons migrate to the top surface of (11−3) facet of the Bi 4 O 5 Br 2 nanosheets, while the holes transfer to the lateral surface of (32−2) and (112) facets. As a result, such Bi 4 O 5 Br 2 nanosheets with vertical aligned facets has highly strengthened the visible-light photodegradation efficiency of bisphenol A (BPA), which is around 6 times higher than that of BiOBr nanosheets. This work provides new sight to rational design the facets of photocatalysts for effective separation of charge carriers and promoted photocatalytic performances.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）