JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2021
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IF 4.291
Chuanlei Li,Xiaonan Tan,Jiahai Ma
Photocatalytic oxidation technology as the environment-friendly treatment method can oxidize organic pollutants into pollution-free small-molecule inorganic substances by producing radicals, holes and hydrogen peroxide. To effectively improve photocatalytic activity, Photo-Fenton reaction of innergenerated-H 2 O 2 is purposed, and the morphology of semiconductor photocatalysts must be precisely controlled during the formation process. According to the experimental characterization and photocatalytic analysis, it is evident that the resultant large specific surface area and good optical capability play the synergetic contributions for their superior pollutant degradation during photocatalysis and Photo-Fenton reaction. Fortuitously, the combination of g-C 3 N 4 nanosheets with CdS (SCNO@CdS) provides plentiful bi-functional redox sites and displays an excellent synergistic catalytic effect. Furthermore, the superior prosperity with multi-functions to degrade mixed dyes including Photo-Fenton and Photocatalysis reaction, and the maximum production rate of H 2 O 2 is 7971.0 μmol·h −1 ·g −1 by 40 wt% SCNO@CdS under irradiation. Without adding hydrogen peroxide will broaden the foresight of Photo-Fenton in the future.
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高影响因子
Journal of Materials Chemistry C
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2021
·Vol. 9
·期 38
·13103-13114
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IF 7.393
Yanpei Fei,Feng Chen,Wei Fang,Aleksander Hejna,Lixin Xu,Tong Liu,Mingqiang Zhong,Jintao Yang,Tairong Kuang
The high conductivity and excellent mechanical properties of polymer composites favor their application as piezoresistive strain sensors. However, developing polymer composites with desirable piezoresistance, mechanical and durable properties is challenging. Herein, we developed conductive cellulose/MWCNTs aerogels using the freeze-drying technique. Furthermore, we explored the application of the highly-sensitive piezoresistive polymer composites following supercritical carbon dioxide (ScCO2) foaming, in cellulose/MWCNTs aerogel-thermoplastic polyurethane (TPU) nanocomposites. Conductive polymer composite (CPC) foams exhibited a significantly low percolation threshold (MWCNTs loading of ∼0.07 vol%) and high piezoresistive sensitivity (GF value of 7.84) owing to the low density (∼0.15 g cm−3) of cellulose/MWCNTs, high porosity (90%) and high electric conductivity (2.04 S m−1). The microcellular structure of composite foams was stable with regard to energy loss coefficient and piezoresistance after several compression cycles (1000 cycles). The behavior of the prepared CPC foams under different conditions was evaluated. The findings of the study showed that the piezoresistive sensors can be used in real-time monitoring of human movement.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Ziqiang Zheng,Ting Wang,Fang Han,Qing Yang,Benxia Li
The development of visible light responsive photocatalysts for simultaneous production of hydrogen (H 2 ) fuel and value-added chemicals is greatly promising to solve the energy and environmental issues by improving the utilization efficiency of solar energy. Herein, the three-component Ni/(Au@CdS) core–shell nanostructures were constructed by the hydrothermal synthesis followed with photodeposition. The intimate integration of plasmonic Au nanospheres and visible-light responsive CdS shells modified with Ni cocatalyst facilitated the generation and separation of electron-hole pairs as well as reduced the overpotential of hydrogen evolution. The Ni/(Au@CdS) photocatalyst exhibited excellent performance toward the selective transformation of benzyl alcohol under anaerobic conditions, and the yields of H 2 and benzaldehyde reached up to 3882 and 4242 μmol·g −1 ·h −1 , respectively. The apparent quantum efficiency (AQE) was determined to be 4.09% under the irradiation of 420 nm. The systematic studies have verified the synergy of plasmonic effect and metal cocatalyst on enhancing the photocatalysis. This work highlights the desirable design and potential application of plasmonic photocatalysts for solar-driven coproduction of H 2 fuel and high-value chemicals.
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PubMed
高影响因子
Nano Research
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2021
·Vol. 15
·期 3
·1809-1816
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IF 8.897
Geng Shuo,Tian Fenyang,Li Menggang,Liu Yequn,Sheng Jie,Yang Weiwei,Yu Yongsheng,Hou Yanglong
The hydrogen evolution reaction (HER) of molybdenum disulfide (MoS 2 ) is limited in alkaline and acid solution because the active sites are on the finite edge with extended basal plane remaining inert. Herein, we activated the interfacial S sites by coupling with Ru nanoparticles on the inert basal plane of MoS 2 nanosheets. The density functional theory (DFT) calculation and experimental results show that the interfacial S electronic structure was modulated. And the results of Δ G H* demonstrate that the adsorption of H on the MoS 2 was also optimized. With the advantage of interfacial S sites activation, the Ru-MoS 2 needs only overpotential of 110 and 98 mV to achieve 10 mA·cm −2 in both 0.5 M H 2 SO 4 and 1 M KOH solution, respectively. This strategy paves a new way for activating the basal plane of other transition metal sulfide electrocatalysts for improving the HER performance.
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高影响因子
APPLIED SURFACE SCIENCE
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2021
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IF 6.707
Yue Xi,Hao-Qiang Feng,Yi-Ke Li,Qun-Zeng Huang
Modification with co-catalyst has been regarded as an effective strategy to improve the photocatalytic H 2 evolution activity of Mn x Cd 1−x S. Herein, cauliflower-like Mn x Cd 1−x S decorated with Ni 2 P nanoparticles has been prepared via solvothermal method. Experiment results confirmed that modification with Ni 2 P could promote charge transfer efficiency and boost surface reaction rate of Mn x Cd 1−x S. The superior activity of 14.20 mmol g −1 h −1 was obtained over the 3 wt% Ni 2 P/Mn 0.2 Cd 0.8 S composite, which was approximately an 8.3-fold enhancement over pure Mn 0.2 Cd 0.8 S. Furthermore, the activity over Mn 0.2 Cd 0.8 S modified with Ni 2 P was higher than other Ni-based co-catalysts (Ni, Ni 2 S, Ni(OH) 2 , NiB and NiSe 2 ) modification. This work offers a new perspective to design highly efficient photocatalytic system towards H 2 evolution.
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高影响因子
Journal of Energy Chemistry
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2021
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IF 9.676
Xiangang Lin,Haiwei Du,Daochuan Jiang,Peng Zhang,Zhiwu Yu,Hong Bi,Yupeng Yuan
The n-π* electronic transition in polymeric carbon nitride (PCN) can remarkably harvest visible light, which thus potentially promotes the photocatalytic hydrogen H 2 generation. However, awaking the n-π* electronic transition has proven to be a grand challenge. Herein, we reported on the awakening of n-π* electronic transition by microwave thermolysis of urea pellet, which yielded the PCN with absorption edge of 600 nm, near 140 nm red-shift from 460 nm of pristine PCN. The n-π* electronic transition endows PCN with an increased photocatalytic H 2 generation, with a highest H 2 rate of 61.7 μmol h −1 under visible light exposure, which is near 6 times higher than that by using the PCN from the thermolysis of urea pellets in an electric furnace (10.6 μmol h −1 ). Furthermore, the n-π* transition in PCN leads to the longest wavelength of 535 nm that can initiate H 2 generation, remarkably longer than the absorption edge of pristine PCN (460 nm). This work manifests the advantages of microwave sintering route to awaken the n-π* electronic transition in PCN for an increased photocatalytic performance.
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高影响因子
ACS Applied Energy Materials
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2021
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IF 6.024
Kai Lv,Dewen Zheng,Yangyang Shi,Xi Zhang,Feihong Wang,Jianming Li,Shanyu Wang,Binbin Dong,Lu Yuan Hao,Liangjun Yin,Xin Xu,Yuxi Xian,Simeon Agathopoulos
Electrode design and fabrication are of major importance for hydrogen evolution reaction applications, as far as high-efficiency and low-cost production of hydrogen are concerned. This paper reports on a titanium-nitride-ceramic-membrane electrode modified by MoS2 nanoflakes. Porous TiN-ceramic membranes were fabricated by phase-inversion tape-casting, followed by pressureless sintering. The as-prepared TiN membranes contained straight finger-like pores with an average diameter of 80 μm and smaller pores with an average diameter of 1–3 μm. Then, MoS2 nanoflakes were perpendicularly, densely, and uniformly grown on the surface of the TiN grains through the one-pot hydrothermal method. The optimized MoS2/TiN membrane electrode displayed a low overpotential of 113 mV at 10 mA cm–2, a Tafel slope of 78 mV dec–1, a small charge transfer resistance of 1.44 Ω, and a high double-layer capacitance of 504 mF cm–2. It also exhibited excellent stability with slight degradation after 80 h testing at an overpotential of 150 mV in 0.5 M H2SO4. The high conductivity of the TiN substrate, the similar chemical bonds, which favored the rapid electron transfer between MoS2 and TiN, the abundant exposed active sites of MoS2 nanoflakes, and the unique dual-pore structure resulted in the above superior electrocatalytic activity. The proposed successful utilization of conventional ceramic-membrane technology to prepare electrocatalysts based on membrane electrodes has potential for large-scale application in industrial hydrogen production.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Meng Li,Yan-Wen Li,Peng-Fei Yu,Hai-Ming Zhao,Lei Xiang,Nai-Xian Feng,Qin-Ke Li,Ke-Ying He,Xuan Luo,Quan-Ying Cai,Shao-Qi Zhou,Ce-Hui Mo,King-Lun Yeung
High-effective catalyst for activating peroxymonosulfate (PMS) to degrade pollutant in wastewater and minimize its toxicity is crucial. Herein, CoFe 2 O 4 /montmorillonite composites (CF/MO) were synthesized and used as high-effective PMS catalysts for the degradation of tetracycline (TC). The CoFe 2 O 4 nanoparticles were firmly loaded on the surface of MO with Fe O Al bonds, preventing the leaching of metal ions and bringing superior reusability and stability. It was optimized that the 20%-CF/MO showed superior catalytic activity to activate PMS for TC degradation, and SO 4 − was the dominant active species for TC complete degradation within 30 min and achieved high kinetic rate of 0.178 min −1 . The ultrahigh catalytic performance toward TC degradation was ascribed to the cycles and regeneration of Co(III)/Co(II) and Fe(III)/Fe(II) synthergetic surface redox couples in the catalysts. The TC degradation pathway and reaction mechanism in the 20%-CF/MO/PMS system were also proposed based on DFT calculation. The ecotoxicity of degradation products was assessed using proteomics, and the toxicity of TC was found to decrease significantly as the reaction progressed.
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高影响因子
CRYSTENGCOMM
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2021
·Vol. 23
·期 23
·4229-4236
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IF 3.545
Sheng Wang,Yan Wang,Yu Zhuang,Wei Lian,Hengdong Ren,Yin Liu,Tianshu Zhang,Ling Bing Kong
In this paper, palygorskite (Pal) and spherical zinc sulfide (ZnS) nanopowders were successfully synthesized by using a simple hydrothermal method. The ZnS nanoparticles were supported on the framework of Pal without agglomeration, thereby increasing the specific surface area of Pal/ZnS nanocomposites (from 36.33 m2 g−1 to 83.85 m2 g−1). The acquired nanocomposites exhibited a significant enhancement in photoactivity for the degradation of rhodamine B under simulated sunlight irradiation. Specifically, when the content of Pal was 40%, the nanocomposite showed optimal photocatalytic activity, with a degradation rate of rhodamine B of 100% in 150 min. The improved photocatalytic performance of the nanocomposites may be attributed to the fact that the incorporation of Pal not only strengthened the adsorption of rhodamine B, but also reduced the band gap energy of the nanocomposites and the recombination rate of electrons and holes. Such inexpensive high-performance Pal/ZnS nanocomposites could find potential applications for the degradation of organic dyes.
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高影响因子
MICROCHEMICAL JOURNAL
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2021
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IF 4.821
Kunxia Li,Xiujuan Qiao,Haiyan Zhao,Yaping He,Qinglin Sheng,Tianli Yue
In this work, we have synthesized the novel carbon dots-black phosphorus nanohybrid (CDs-BP). And a novel label-free electrochemical aptasensor based on CDs-BP was constructed for ultrasensitive detection of Ochratoxins A (OTA). The morphology and structure of nanocomposite were analyzed by transmission electron microscope, X-ray photoelectron spectroscopy, Zeta potential, et al. The CDs-BP nanohybrid, an excellent carrier for the immobilization of aptamer (Apta), was prepared through C-P bond, resulting in the enhancement of the electrochemical sensing performance for OTA detection. The results showed that the aptasensor had a wide linear range towards OTA (0.1 fg/mL − 10.0 ng/mL) with a low detection limit of 0.03 fg/mL under the optimal conditions. The proposed aptasensor displayed good electrochemical stability and excellent selectivity to OTA detection. Moreover, a satisfactory practical application results were obtained for different actual samples of wheat and grape juice samples. Thus, a new aptasensor was raised based on the CDs-BP nanocompound for the electrochemical detection of contaminants in edible agricultural food.
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高影响因子
CATALYSIS LETTERS
·
2021
·Vol. 152
·期 1
·263-275
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IF 3.186
Wei Jian,Huang He,Luo Qinglong,Liu Na,Wang Xueying,Wang Xuefeng,Zhong Mei,Huang Xueli
Few layer (< 5 layers) MoS 2 mixed with a 1T phase has the characteristics of a large specific surface area and an improved active site distribution. Therefore, it has been increasingly study for the catalytic hydrodesulfurization of polycyclic compounds. In this paper, few-layer MoS 2 with a high proportion of the 1T phase is synthesized by a one-step solvothermal method using a green non-toxic ethanol/water solvent. Results show that few-layer MoS 2 (3–5 layers) with a 1T phase up to 48% can be synthesized in a 50% ethanol solvent. This MoS 2 is used to catalyse the hydrodesulfurization reaction of dibenzothiophene, and the target product conversion rate reaches 84.2%. Among them, biphenyl accounts for 70.2%, phenylcyclohexane accounts for 13.9%, and bicyclohexane accounts for 0.4%. According to the Hansen solubility parameter (HSP) distance Ra, the effects of solvents on the structure and morphology of MoS 2 and the conversion of dibenzothiophene hydrodesulfurization are determined. This work is significant for the synchronous synthetic exfoliation of MoS 2 with a controllable number of layers, a higher ratio of the 1T phase and good catalytic HDS of polycyclic compounds. Graphic Abstract Few layers and high proportion of 1T phase MoS 2 by solvothermal synthesis for catalytic hydrodesulfurization of dibenzothiophene.
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高影响因子
SOLAR ENERGY
·
2021
·
IF 5.742
Junye Tong,Shaotong Wang,Gang Wang,Yue Liu,Yuxiang Wang,Liping Chen,Lingling Wang,Daocheng Pan,Xintong Zhang,Yichun Liu
Ion doping strategy is a promising method to enhance the efficiency of Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells, however, most of the reported works focus on studying the single ion doping in CZTSSe absorber layers . Here, Li + &Ag + and Li + &Cd 2+ double-ion-doping strategy are applied to improve the microstructure and device performances. We found that the double-ion-doping strategy can obviously increase the grain size, reduce the thickness of fine-grain layers and enhance the device performances. Furthermore, the PCEs of Li + &Ag + and Li + &Cd 2+ doped CZTSSe solar cells are up to 8.87% and 8.39%, respectively. It shows an encouraging improvement of over 43.5% and 35.8% enhancement compared with the traditional method (6.18%), and significantly higher than single ion doping strategy (7.60%, 7.99% and 7.11% for Li + , Ag + , and Cd 2+ doped CZTSSe solar cells). This work provides a new solution to improve the microstructure and device performances of CZTSSe solar cells.
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高影响因子
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