Synthesis of S-Doped porous g-C3N4 by using ionic liquids and subsequently coupled with Au-TiO2 for exceptional cocatalyst-free visible-light catalytic activities

Raziq, Fazal; Humayun, Muhammad; Ali, Asad; Wang, Tingting; Khan, Abbas; Fu, Qiuyun; Luo, Wei; Zeng, Heping; Zheng, Zhiping; Khan, Bilawal; Shen, Huahai; Zu, Xiaotao; Li, Sean; Qiao, Liang

doi:10.1016/j.apcatb.2018.06.009

Cited by 154 publications

(53 citation statements)

References 44 publications

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“…Numerous methods such as hydrothermal, surfactant-template and sol-gel methods have been used to develop porous nanostructure with large surface area. It is reported that well-synthesized nanostructures are often used to further boost the performances of electrodes [20][21][22][23] . This is because good electrochemical reactions are usually found on the surfaces of the first few atomic layers, increasing the capacitance efficiency of electrode materials.…”

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confidence: 99%

Marigold flower like structured Cu2NiSnS4 electrode for high energy asymmetric solid state supercapacitors

Isacfranklin

Yuvakkumar

Ravi

et al. 2020

Sci Rep

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The growth in energy devices and the role of supercapacitors are increasingly important in today’s world. Designing an electrode material for supercapacitors using metals that have high performance, superior structure, are eco-friendly, inexpensive and highly abundant is essentially required for commercialization. In this point of view, quaternary chalcogenide Cu2NiSnS4 with fascinating marigold flower like microstructured electrodes are synthesized using different concentrations of citric acid (0, 0.05 M, 0.1 M and 0.2 M) by employing solvothermal method. The electrode materials physicochemical characteristics are deliberated in detail using the basic characterization techniques. The electrochemical studies revealed better electrochemical performances, in particular, Cu2NiSnS4@0.1 M-CA electrode revealed high 1029 F/g specific capacitance at 0.5 A/g current density. Further, it retained 78.65% capacity over 5000 cycles. To prove the practical applicability, a full-cell asymmetric solid-state device is fabricated, and it delivered 41.25 Wh/Kg and 750 Wh/Kg energy and power density at 0.5 A/g. The optimum citric acid added Cu2NiSnS4 electrode is shown to be a promising candidate for supercapacitor applications.

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confidence: 99%

Marigold flower like structured Cu2NiSnS4 electrode for high energy asymmetric solid state supercapacitors

Isacfranklin

Yuvakkumar

Ravi

et al. 2020

Sci Rep

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“…Even though theoretical and numerous experimental studies have been done on the BiOBr/ g-C 3 N 4 , reports on CO 2 reduction are lacking, and further investigation is still needed to figure out the intrinsic photocatalytic mechanism of CO 2 reduction on BiOBr/ g-C 3 N 4 . In addition, previous studies indicate that element doping such as S doping can promote the performance of photocatalytic CO 2 reduction (Raziq et al, 2018;Wang et al, 2018;Ojha et al, 2019). It can be inferred that the introduction of S atom into BiOBr/g-C 3 N 4 (BiOBr/S-g-C 3 N 4 ) can improve the photocatalytic CO 2 reduction performance.…”

Section: Introductionmentioning

confidence: 99%

DFT Study on Regulating the Electronic Structure and CO2 Reduction Reaction in BiOBr/Sulphur-Doped G-C3N4 S-Scheme Heterojunctions

Fei

Zhang

et al. 2021

Front. Nanotechnol.

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Photocatalytic CO2 reduction is a promising method to mitigate the greenhouse effect and energy shortage problem. Development of effective photocatalysts is vital in achieving high photocatalytic activity. Herein, the S-scheme heterojunctions composed by BiOBr and g-C3N4 with or without S doping are thoroughly investigated for CO2 reduction by density functional theory (DFT) calculation. Work function and charge density difference demonstrate the existence of a built-in electric field in the system, which contributes to the separation of photogenerated electron-hole pairs. Enhanced strength of a built-in electric field is revealed by analysis of Bader charge and electric field intensity. The results indicate that S doping can tailor the electronic structures and thus improve the photocatalytic activity. According to the change in absorption coefficient, system doping can also endow the heterojunction with increased visible light absorption. The in-depth investigation indicates that the superior CO2 reduction activity is ascribed to low rate-determining energy. And both of the heterojunctions are inclined to generate CH3OH rather than CH4. Furthermore, S doping can further reduce the energy from 1.23 to 0.44 eV, indicating S doping is predicted to be an efficient photocatalyst for reducing CO2 into CH3OH. Therefore, this paper provides a theoretical basis for designing appropriate catalysts through element doping and heterojunction construction.

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“…3 Presently, utilization of natural resources of fossil fuels is rapid because the increase in population rate is quite high which demands alternative environment-friendly energy resources. [4][5][6] One such way which can help to have a balance between demand and consumption of energy can be achieved using photovoltaic technologies in an environment-friendly atmosphere. 7 In today's world research studies providing a more promising solution to overcome energy crises gain warm attention.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of clay‐armored coatable sulfonated polyimide nanocomposites as robust polyelectrolyte membranes

Ali

Said

et al. 2021

J of Applied Polymer Sci

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Herein, coatable sulfonated polyimide (SPI) and clay-reinforced SPI membranes SPI-clay 3%, SPI-clay 5%, and SPI-clay 7% were successfully fabricated by one-step high temperature via direct imidization method. The membranes were cast as a coatable thin film using a solution casting method and grafted vermiculite clay nanoparticle were incorporated into the neat SPI as reinforcement by the sonication method. Three different formulated nanocomposite membranes were investigated using different characterization techniques such as Fourier transform infrared spectroscopy as peaks at 1166 and 1227 cm À1 confirmed successful sulfonation. In Proton ( 1 H) NMR synthesis of SPI confirmed as aromatic proton at 7.3-8.8 ppm depicts successful sulfonation and X-ray diffraction results confirmed the crystalline structure of clay, as its content increased (7%) clear diffraction peak arises at 6 and 25 . Scanning electron microscopy (SEM) provides information about surface morphology of clay reinforced SPI membranes, and SEM micrographs shown uniform dispersion of clay nanofillers and developed easy transfer of electron. Thermogravimetric analysis was performed to investigate the thermal stability of synthesized films, results of thermographs shown degradation in the range of 510-600 C. Different physicochemical parameters employed and their results show the effectiveness of synthesized clay reinforced SPI membranes. Water uptake (WU%) about 0.96%, hydrolytic about 98 h and oxidative stability up to 80 C, ions exchange capacity about 3.16 mmol/g for synthesized clay reinforced SPI membranes. Measurement regarding Dimensional changes was also investigated and dimensional changes (1.557 Δt/Δl). All these results reveal that the clay-reinforced coatable SPI membranes are a promising material for polymer electrolyte membranes to be used in fuel cell energy applications.

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Synthesis of S-Doped porous g-C3N4 by using ionic liquids and subsequently coupled with Au-TiO2 for exceptional cocatalyst-free visible-light catalytic activities

Cited by 154 publications

References 44 publications

Marigold flower like structured Cu2NiSnS4 electrode for high energy asymmetric solid state supercapacitors

Marigold flower like structured Cu2NiSnS4 electrode for high energy asymmetric solid state supercapacitors

DFT Study on Regulating the Electronic Structure and CO2 Reduction Reaction in BiOBr/Sulphur-Doped G-C3N4 S-Scheme Heterojunctions

Synthesis of clay‐armored coatable sulfonated polyimide nanocomposites as robust polyelectrolyte membranes

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