A Nitrogen-Rich Covalent Triazine Framework as a Photocatalyst for Hydrogen Production by Ruizhi Gong, Liuliu Yang, Shuo Qiu, Wan-Ting Chen, Qing Wang, Jiazhuo Xie, Geoffrey I. N. Waterhouse, Jing Xu

“…CTF-CN possessed strong absorption at visible wavelengths, with UV-vis measurements suggesting a band gap energy in the range 2.7-2.9 eV. A 5 wt.% Pt/CTF-CN was found to be a promising photocatalyst for hydrogen production, affording a rate of 487.6 μmol g-1 h-1 in a H2O/TEOA/CH3OH solution under visible light. …”
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Structural, morphological, and optical characterization of indium selenide (In2Se3) obtained by mechanical alloying by Josue Fernando Teoyotl Sosa, José Álvaro David Hernández de la Luz, Osvaldo López Hernández, Gabriel Juárez Diaz, Primavera López Salazar

“…Photoluminescence (PL) spectra show an emission of around 1.26 eV, lower than that reported in the literature, and the optic band gap energy E _g , determined by transmission spectra and the Tauc method, was 1.23 eV, a value not previously reported for this phase.…”
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Dynamic Hydrogen Production from Methanol/Water Photo-Splitting Using Core@Shell-Structured CuS@TiO2 Catalyst Wrapped by High Concentrated TiO2 Particles by Younghwan Im, Sora Kang, Kang Min Kim, Taeil Ju, Gi Bo Han, No-Kuk Park, Tae Jin Lee, Misook Kang

“…The synthesized core@shell-structured CuS@TiO2 particles absorbed a long wavelength (a short band gap) above 700 nm compared to that pure TiO2, which at approximately 300 nm, leading to easier electronic transitions, even at low energy. …”
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Characterizations of synthesized laser scribed graphene/molybdenum disulfide (LSG/MoS2) hybrids for supercapacitor performance by Mugashini Vasudevan, Aiswarya Kanesan, Sathaniswarman Remesh, Veeradasan Perumal, Pandian Raja, Mohamad Nasir Mohamad Ibrahim, Saravanan Karuppanan, Subash Gopinath, Mark Ovinis

“…In this study, LSG/MoS2 hybrids were fabricated to overcome the graphene zero band gap, restacking issues of molybdenum disulfide and to induce the electrical conductivity. …”
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Optimization of photocatalytic degradation of Eriochrome Black T from aqueous solution using TiO2-biochar composite by Mohammednur Abdu, Solomon Tibebu, Saeideh Babaee, Abebe Worku, Titus A.M. Msagati, Jemal Fito Nure

“…The synthesis resulted in an anatase phase crystal structure, a reduced band gap of 2.69 eV, and a significant surface area increase from 38 m²/g to 78 m²/g. …”
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Antibacterial and photocatalytic activities of biosynthesized zinc oxide nanoparticle using novel plant P. macrosolen L. leaf extract by Abel Saka Gungure, Leta Tesfaye Jule, N. Nagaprasad, Krishnaraj Ramaswamy, Shanmugam Ramaswamy

“…The FTIR spectrum also revealed broad and strong peaks corresponding to –OH groups, confirming the high concentration of phenolic acids present in the extract. The energy band gap of the biosynthesized ZnO Nanoparticles, calculated using the Tauc relation, was found to be 3.0 eV, indicating the presence of a blue shift. …”
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Electrocatalytic detection of Acetaminophen by sodium ferrite by Saima Perveen, Jameel Ahmed Baig, Mohammad Nur-e-Alam, Mohsin Kazi, Shahabuddin Memon, Tasneem Gul Kazi, Khalil Akhtar, Sajjad Hussain

“…The Na2Fe4O7-NPs were characterized by advanced analytical techniques such as x-ray diffraction (XRD), fourier transform infrared (FTIR), UV–visible, atomic force microscopy (AFM), zeta potential, zeta sizer, energy dispersive x-ray (EDX) and field emission scanning electron microscopy (FESEM) which displayed that the Na2Fe4O7-NPs possess hexagonal structure, a narrow band gap (1.475 eV), corresponding to their excellent electronic capability, nanosize of particles, rough surface and highly stable nature for electrochemical analysis. …”
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New Approach of the Oxidant Peroxo Method (OPM) Route to Obtain Ti(OH)4 Nanoparticles with High Photocatalytic Activity under Visible Radiation by André E. Nogueira, Lucas S. Ribeiro, Luiz F. Gorup, Gelson T. S. T. Silva, Fernando F. B. Silva, Caue Ribeiro, Emerson R. Camargo

“…The highest photocatalytic activity can be attributed to the strong visible light absorption, due to the narrow band gap, and the effective separation of photogenerated electron-hole pairs caused by the peroxo groups on the Ti(OH)4 surface.…”
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Kinetics, central composite design and artificial neural network modelling of ciprofloxacin antibiotic photodegradation using fabricated cobalt-doped zinc oxide nanoparticles by Asmaa I. Meky, Mohamed A. Hassaan, Mohamed A. El-Nemr, Howida A. Fetouh, Amel M. Ismail, Ahmed El Nemr

“…Tauc plot displayed that the optical energy band-gap of ZnO NPs (3.21) slowly declines with Co doping (2.75 eV). …”
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Harnessing defects in Ag/CeO2 for enhanced photocatalytic degradation of antibiotic in water: Structural characteristics, in-depth insights on mechanism, degradation pathway by Ajit Kumar Dhanka, Emerson C. Kohlrausch, Raghabendra Samantray, Vinod Kumar, Balaram Pani, Nityananda Agasti

“…Notably, the addition of Ag to CeO2 reduces the band gap energy to 2.90 eV, accompanied by an increase in Ce3+ content which is correlated with an increase in oxygen vacancies. …”
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Wide-Gap p-μc-Si1-xOx:H Films and Their Application to Amorphous Silicon Solar Cells by Taweewat Krajangsang, Sorapong Inthisang, Aswin Hongsingthong, Amornrat Limmanee, Jaran Sritharathikhun, Kobsak Sriprapha

“…The properties of p-μc-Si1-xOx:H films were characterized by conductivity, Raman scattering spectroscopy, and spectroscopic ellipsometry. The wide optical band gap p-μc-Si1-xOx:H films were optimized by CO2/SiH4 ratio and H2/SiH4 dilution. …”
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Site-specific substitution in atomically precise carboranethiol-protected nanoclusters and concomitant changes in electronic properties by Vivek Yadav, Arijit Jana, Swetashree Acharya, Sami Malola, Harshita Nagar, Ankit Sharma, Amoghavarsha Ramachandra Kini, Sudhadevi Antharjanam, Jan Machacek, Kumaran Nair Valsala Devi Adarsh, Tomas Base, Hannu Häkkinen, Thalappil Pradeep

“…We show that Au preferentially occupies the core, while Cu localizes in the tetrahedral shell, influencing stability and structural diversity of the clusters. The band gap expands systematically (2.09 eV for Ag17 to 2.28 eV for AuAg12Cu4), altering optical absorption and emission. …”
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Manganese ferrite-graphite oxide-chitosan nanocomposite for efficient dye removal from aqueous and textile wastewater under UV and sunlight irradiation by Nazila Mohammad Hosseini, Shabnam Sheshmani, Ashraf S. Shahvelayati

“…DRS analysis indicated band gap energies of 3.1 eV for MnFe2O4, 3.0 eV for MnFe2O4/GO, and 3.5 eV for MnFe2O4/GO/CS. …”
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Emerging contaminant removal using eco-friendly zinc ferrite nanoparticles: Sunlight-driven degradation of tetracycline by Ramesh Vinayagam, Syonaa Batra, Gokulakrishnan Murugesan, Louella Concepta Goveas, Thivaharan Varadavenkatesan, Ashton Menezes, Raja Selvaraj

“…The nanoparticles exhibited a band gap of 4.87 eV, broad UV–visible absorption, and a specific surface area of 77.99 m2/g with a mean pore size of 10.79 nm, all contributing to enhanced photocatalytic activity. …”
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Solanum tuberosum Leaf Extract Templated Synthesis of Co3O4 Nanoparticles for Electrochemical Sensor and Antibacterial Applications by Eneyew Tilahun Bekele, H. C. Ananda Murthy, Dhanalakshmi Muniswamy, Yeshaneh Adimasu Lemenh, Minale Shegaw Shume, Gezahegn Tadesse Ayanie, Avvaru Praveen Kumar, C. R. Ravikumar, R. Balachandran, Arpita Roy

“…SEM-EDX and TEM analyses suggest that the green-synthesized Co3O4 NPs are spherical in shape without the presence of impurities. The band gap Eg values of the 1 : 2, 1 : 1, and 2 : 1 volume ratios of Co3O4 NPs were found to be 1.83, 1.77, and 2.19 eV, respectively. …”
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Synthesis and Characterization of Copper Ferrite Nanoparticles for Efficient Photocatalytic Degradation of Organic Dyes by Julia Mazurenko, A. K. Sijo, Larysa Kaykan, Volodymyr Kotsyubynsky, Łukasz Gondek, Antoni Zywczak, Mateusz Marzec, Oleksii Vyshnevskyi

“…Optical and photocatalytic properties were investigated using spectrophotometry, revealing an optical band gap of 1.85 eV, which demonstrates potential for photocatalytic activity under visible light. …”
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Insights into the photocatalytic removal of malachite green organic pollutant by highly efficient hard responsive Ba1 − xCoxDyyFe12−yO19 catalysts by Himanshi, Basant Lal, Ankit Verma, Suman, Jahangeer Ahmed, Arunima Singh, Chan Choon Kit, Rohit Jasrotia, Natrayan Lakshmaiya, Varun Mehra, Abhishek Kandwal

“…The specific surface area (SSA) of the HF1 sample is 3.523 m2/g, whereas the band gap values of co-doped barium hexaferrites are found within the range of 1.61 to 1.75 eV. …”
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Green synthesis and enhanced photocatalytic performance of Co-Doped CuO nanoparticles for efficient degradation of synthetic dyes and water splitting by Daniel Masekela, Lovedonia K. Kganyakgo, Kwena D. Modibane, Tunde L. Yusuf, Sheriff A. Balogun, Wilson M. Seleka, Edwin Makhado

“…The optical and electrochemical properties, including the energy band gap, transient photocurrent response (TPR), and charge-transfer resistance (Rct), were assessed using chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS), respectively. …”
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Elevating photovoltaic efficiency: Cobalt doping approaches with sustainable transition metal cations in lead halide perovskite solar cells by M.I. Khan, Saddam Hussain, M. Atif, J.E. Leal-Perez, B.A. García-Grajeda, J.M. Mendivil-Escalante

“…Further assessment of the optical properties by UV–Vis analysis reveals that the incorporation of 3 % Co2+ doping into MAPbI2Br reduced the band gap energy to 1.84 eV. All in all, in terms of important solar cell performance metrics, the introduction of 3 % Co2+ doping to MAPbI2Br has led to significant improvements. …”
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Water remediation and antibacterial characteristics of CdO, graphene oxide and reduced graphene oxide blended CdO nanoparticles – A comparative study by N. Manjula, A.R. Balu, N. Arunkumar, S. Chitra Devi, M. Sriramraj, V. Rajamani, A. Vinith

“…Blending GO reduced CO's band gap from 2.44 to 2.41 and rGO lowered it to 2.39 ​eV. …”
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