FUEL
·
2022
·
IF 8.035
Haiping Yang,Shuai Yan,Dingding Yao,Hao Luo,Kuo Zeng,Jun Li,Dian Zhong,Haoyu Xiao,Hanping Chen
A novel photo-thermal catalytic pyrolysis of LDPE was conducted with a solar simulator for effective and energy-conserving production. Four photothermal catalysts, including TiO 2 , NiTi(Ni/TiO 2 ), NiAl(Ni/Al 2 O 3 ) and NiTiAl(Ni/TiO 2 /Al 2 O 3 ), were prepared to study the performance on gas and carbonaceous production at variant temperatures (500 °C, 600 °C and 700 °C). NiTiAl reached carbon nanotubes(CNTs) yield of 280 mg/g plastics with simultaneous hydrogen yield of 54 mmol/g even at 700 °C. For the better understanding of light-induced carbon deposition and hydrogen evolution, pyrolysis in pure thermal mode was also carried out over NiTiAl for comparison, where H 2 production of 28 mmol/g and little carbon product was found. It turns out that the introduction of irradiation together with support component deliberately mediated the metal-support interaction in NiTiAl by certain photoelectrons transfer, which was favorable for CNTs growth and hydrogen evolution. It is expected to provide a design strategy of catalysts in solar pyrolysis of carbonaceous feedstock.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Yiqiao Song,Yong Zhang,Mo Ma,Jianxu Ren,Can Liu,Junjiang Tan
In order to realize effective detection of target gas without traditional heating condition, a strategy to detect gas assisted by light illumination has attracted more and more attention. Especially, visible light illumination brings opportunities and challenges for gas detection without heating condition. Herein, the formaldehyde (HCHO) sensing properties of HoFeO 3 nanoparticles assisted by various light illuminations (λ = 365-660 nm) are systematically investigated, and red light with 660 nm is proved to be the best assisting light for HCHO detection. The detection limit of light-assisted gas sensor toward HCHO can reach sub ppm level, which is about 80 ppb. Meanwhile, it can also achieve good anti-interference performance against environmental humidity, namely, the maximum drift of response value is 9 within the humidity range of 11%–75% RH. The low detection limit and outstanding anti-interference against humidity are ascribed to the increase of the activation energy between HCHO and surface adsorbed oxygen ions and the suppression of adsorbed water molecules, which are provided by the 660 nm light illumination.
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高影响因子
CHEMICAL PHYSICS LETTERS
·
2018
·
IF 1.686
Shiyu Zuo,Haiming Xu,Wei Liao,Lei Sun,Qiang Li,Jie Zan,Binyang Zhang,Dongya Li,Dongsheng Xia
In this study, g-C 3 N 4 Cu 2 O was successfully synthesized in the presence of PEG-400 surfactant via an acid treatment hydrothermal method and a high-temperature calcination method. The structures and properties of as-synthesized samples were characterized using a range of techniques, such as XPS, TEM, PL and BET. The g-C 3 N 4 Cu 2 O heterojunction exhibits the enhanced photocatalytic performance and high stability. It is revealed that the addition of PEG can promote the heterojunction effect of g-C 3 N 4 Cu 2 O, effectively improving the crystallinity and specific surface area of the photocatalyst, separation efficiency of photocarriers, and light absorption, thus enhancing the photocatalytic performance.
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高影响因子
CRYSTAL GROWTH & DESIGN
·
2023
·
IF 3.8
Huijuan Zhang,Wenyan Luo,Zaichun Sun,Chunya Li
Bismuth oxyiodides have been gradually regarded as a kind of promising optoelectronic material, owing to their various merits, like relatively narrow and tunable band gap, high anisotropic crystal structure, and less toxicity. However, the investigation of bismuth oxyiodide-based photodetectors is still in the early stage, which might be attributed to the immature film deposition techniques in controlling their phase composition and surface morphology. In this work, high-quality Bi4O5I2 thin films were synthesized for the first time by a facile solution-based deposition technique, mist chemical vapor deposition. The synthesized Bi4O5I2 thin films were composed of vertically aligned nanoplatelets. With the increasing synthesis temperatures, the size of the nanoplates and film thickness increased. The iodide content was influenced by the synthesis temperatures such that the I:Bi molar ratio for the Bi4O5I2 thin films at intermediate temperature was close to 50%. The Bi4O5I2 photoelectrochemical (PEC)-type photodetectors were fabricated and exhibited excellent photodetection performance with the highest responsivity of 19.4 mA/W and detectivity of 3.54 × 1010 Jones. In addition, Bi4O5I2 PEC-type photodetectors presented good long-term stability in that the photocurrent density only decreased by around 25% after 6 h, which was superior to most 2D material-based PEC-type photodetectors. These results demonstrated that the Bi4O5I2 thin film has great potential in high-performance optoelectronic devices.
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2019
·
IF 3.355
Hui-Ping Qi,Hui-Long Wang,De-Ying Zhao,Xin-Kui Wang
The novel magnetic superstructure GO-TiO 2 mesocrystal composites (Fe 3 O 4 /GO-TMC) were synthesized by solvothermal reaction process and subsequent amidation reaction using amino-functionalized Fe 3 O 4 with different morphologies, TiO 2 mesocrystals (TMC) and graphene oxide (GO). The morphology, crystallization, chemical compositions and microstructure characteristics of the magnetic Fe 3 O 4 /GO-TMC composites were investigated by different techniques. It can be confirmed that the magnetic superstructure TiO 2 mesocrystal composites consist of TiO 2 mesocrystals and Fe 3 O 4 with different morphologies homogeneously anchored on graphene oxide through chemical bonding. The unique morphologies of Fe 3 O 4 and TiO 2 mesocrystals were maintained in the final magnetic composite products. The photocatalytic performances of the prepared samples were evaluated for the degradation of Rhodamine B (RhB) under visible light irradiation. The results showed the magnetic Fe 3 O 4 /GO-TMC samples were more superior to TMC and GO-TMC. The high photocatalytic efficiency could be ascribed to the advantages and synergic effects of different components in the Fe 3 O 4 /GO-TMC samples.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 55
·期 10
·4265-4278
·
IF 3.442
Hu Miao,Yan Aihua,Cui Qiaopeng,Huang Fei,Li Dengke,Li Fan,Huang Ji,Qiang Yinghuai
In this work, nickel sulfide (NiS)/bismuth oxybromide (BiOBr) hybrids were synthesized by a two-step hydrothermal method. Some advanced tools were employed to characterize the crystal phase, morphological evolution, light absorption and photocatalytic performance. Significantly, NiS/BiOBr hybrids exhibited enhanced photocatalytic activity toward rhodamine B (RhB) degradation under visible light irradiation. Comparatively, NS/BOB-3.0 showed the highest degradation rate, over 2.5 times higher than that of pure BiOBr. Furthermore, the retarded recombination rate of photogenerated carriers contributed to the improved photocatalytic performance. The results indicate that hybrids may be a promising method for enhancing the photocatalytic ability of BiOX-based semiconductor.
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高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Sen Jin,Zuhao Shi,Huijuan Jing,Libo Wang,Qianku Hu,Deliang Chen,Neng Li,Aiguo Zhou
Here, we report a visible-light photocatalyst (Mo2C-MXene/CdS) with H2 production rate higher than that of state-of-the-art catalysts based on noble metals or other MXenes. The photocatalyst was constructed from Mo2C MXene, Cd(NO3)2·4H2O, and thiourea with ethylenediamine, which has an acanthosphere structure with Mo2C two-dimensional (2D) sheets covered by wurtzite CdS nanocrystals. From theoretical calculation, Mo sites in the Mo2C-MXene/CdS(110) heterostructure provide an efficient reaction site for the hydrogen evolution reaction (ΔGH* = −0.18 eV). The electronic structures demonstrate that this heterostructure has favorable band gap and band edge position for water splitting. In experimental measurements, the photocatalyst shows a H2 production rate of 17 964 μmol g–1 h–1. The H2 production is ca. 20% higher than the previously reported value of Ti3C2 MXene catalysts and ca. 11% higher than that of noble-metal catalysts. Therefore, Mo2C-MXene/CdS heterostructure is a promising catalyst with ultrahigh performance to replace noble-metal catalysts.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2023
·
IF 13.6
Bo Yang,Wenjing Wang,Zhenzhong Hu,Boxiong Shen,Sheng-Qi Guo
Developing new photocatalysts to achieve efficient removal of phthalate esters (PAEs) in water is an important research task in environmental science. However, existing modification strategies for photocatalysts often focus on enhancing the efficiency of material photogenerated charge separation, neglecting the degradation characteristics of PAEs. In this work, we proposed an effective strategy for the photodegradation process of PAEs: introducing vacancy pair defects. We developed a BiOBr photocatalyst containing “Bi-Br” vacancy pairs, and confirmed that it has an excellent photocatalytic activity in removing phthalate esters (PAEs). Through a combination of experimental and theoretical calculations, it is proved that “Bi-Br” vacancy pairs can not only improve the charge separation efficiency, but also alter the adsorption configuration of O 2 , thus accelerating the formation and transformation of reactive oxygen species . Moreover, “Bi-Br” vacancy pairs can effectively improve the adsorption and activation of PAEs on the surface of samples, surpassing the effect of O vacancies. This work enriches the design concept of constructing highly active photocatalysts based on defect engineering, and provides a new idea for the treatment of PAEs in water.
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DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2017
·
IF 5.951
Long Sun,Ting Du,Chao Hu,Juanni Chen,Jian Lu,Zhicheng Lu,Heyou Han
Carbon-based nanomaterials have been widely developed into innovative antimicrobial agents due to their advantages of high surface-to-volume ratio, extremely high mechanical strength, and distinct physicochemical properties. Here, the nanocomposite of graphene oxide/graphitic carbon nitride (GO/g-C3N4), a free-metal photocatalyst, was fabricated through sonication at room temperature and its antibacterial activity against Escherichia coli (E. coli) was investigated. The 100 μg/mL GO/g-C3N4 composite was found to kill 97.9% of E. coli after 120 min visible light irradiation, which was further confirmed by fluorescent-based cell membrane integrity assay. Additionally, the holes produced by photocatalysis were confirmed by electron spin resonance (ESR) spectra and trapping experiments to participate in photocatalytic sterilization as principal active species and were further verified by transmission electron microscopy (TEM) and scanning electron microscope (SEM) to lead to the distortion and rupture of cell membrane and finally cell death. Further photoluminescence (PL) spectra, cyclic voltammetry, photocurrent generation, and impedance spectroscopy (EIS) characterization revealed that the introduction of GO contributed to separate photogenerated electrons and prevents the electron–hole pairs of g-C3N4 from recombing to generate more h+, thus directly improving the bactericidal ability of GO/g-C3N4. Reusability assays indicated that the GO/g-C3N4 retained more than 90% of activity after four cycles of use. This study facilitates an in-depth understanding of the mechanism of visible light-driven disinfection and provides an ideal candidate sterilizing agent for treating microbial-contaminated water.
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高影响因子
Journal of the American Chemical Society
·
2020
·
IF 14.612
Peishen Li,Ziang Zhou,Qiang Wang,Ming Guo,Shaowei Chen,Jingxiang Low,Ran Long,Wen Liu,Peiren Ding,Yunyun Wu,Yujie Xiong
Photocatalytic nitrogen fixation represents a green alternative to the conventional Haber–Bosch process in the conversion of nitrogen to ammonia. In this study, a series of Bi5O7Br nanostructures were synthesized via a facile, low-temperature thermal treatment procedure, and their photocatalytic activity toward nitrogen fixation was evaluated and compared. Spectroscopic measurements showed that the tubular Bi5O7Br sample prepared at 40 °C (Bi5O7Br-40) exhibited the highest electron-transfer rate among the series, producing a large number of O2.– radicals and oxygen vacancies under visible-light photoirradiation and reaching a rate of photocatalytic nitrogen fixation of 12.72 mM·g–1·h–1 after 30 min of photoirradiation. The reaction dynamics was also monitored by in situ infrared measurements with a synchrotron radiation light source, where the transient difference between signals in the dark and under photoirradiation was analyzed and the reaction pathway of nitrogen fixation was identified. This was further supported by results from density functional theory calculations. The reaction energy of nitrogen fixation was quantitatively estimated and compared by building oxygen-enriched and anoxic models, where the change in the oxygen vacancy concentration was found to play a critical role in determining the nitrogen fixation performance. Results from this study suggest that Bi5O7Br with rich oxygen vacancies can be used as a high-performance photocatalyst for nitrogen fixation.
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PubMed
高影响因子
CURRENT APPLIED PHYSICS
·
2021
·
IF 2.48
Ning Liu,Fangtian You,Chao Ji,Hongkang Gong,Qi Song,Jiasen Li,Chunjun Liang,Zhiqun He
Perovskite light-emitting diodes (PeLEDs) prepared by the all-solution-process are gradually coming into view due to their low cost and flexible production process. However, the performance of CsPbBr 3 device is limited by the high non-radiative recombination losses due to incomplete surface coverage and grain defects. Here a quaternary ammonium salt, tetrabutylammonium hexafluorophosphate (TBA-PF 6 ) was simultaneously introduced into perovskite emission layers (CsPbBr 3 ) and electron transport layer (TPBi (1,3,5-Tris(1-phenyl-1H-benzimidazol-2-yl) benzene) dissolved in ethyl acetate). As a result, the morphology and luminescence of CsPbBr 3 films were improved, and the energy level of TPBi was more conducive to charge transport. Consequently, the maximum luminance and current efficiency of the modified green-emitting PeLEDs are improved. Furthermore, the optimized device had an operating life of more than 20 min at an initial luminance of 1230 cd/m 2 . This work provides a simple and easy method to be scaled up for the development of low-cost all-solution-processed PeLEDs.
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高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 13
·4496-4504
·
IF 7.393
Qinghong Zheng,Huixin Li,Yiling Zheng,Yinan Li,Xi Liu,Shuangxi Nie,Xinhua Ouyang,Lihui Chen,Yonghao Ni
A cellulose-based flexible organic light-emitting diode (OLED) with enhanced stability and light extraction efficiency was prepared by using a PEDOT:PSS PH1000 transparent conductive electrode coated on regenerated cellulose film (RCF). The PH1000/RCF transparent conductive electrode exhibits extra-high bending stability as compared to the traditional ITO/RCF electrode, which can be attributed to the highly flexible nature of PH1000 and the strong interaction between PH1000 and cellulose. Finite-difference-time-domain simulations show that, due to the smaller refractive index mismatch between PH1000 and RCF, a small proportion of photons are confined in the optical waveguide. The external quantum efficiency of the PH1000/RCF OLED (3.65%) is enhanced by nearly 36.2%, as compared to the ITO/RCF OLED device (2.68%). The ITO-free cellulose-based flexible OLED with enhanced stability and external quantum efficiency would be attractive in a wide range of applications, such as flexible displays, wearable devices and so on.
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高影响因子
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