SATYABRATA SUBUDHI
@iitk.ac.in
POSTDOCTORAL RESEARCHER
IIT KANPUR
EDUCATION
PhD in Chemistry
RESEARCH, TEACHING, or OTHER INTERESTS
Materials Chemistry, Materials Science, Inorganic Chemistry, Chemistry
Scopus Publications
Scopus Publications
Srabani Dash, Suraj Prakash Tripathy, Satyabrata Subudhi, Pragyandeepti Behera, Bhagyashree Priyadarshini Mishra, Jayashree Panda, and Kulamani Parida
American Chemical Society (ACS)
Photocatalytic hydrogen production and pollutant degradation using a heterogeneous photocatalyst remains an alternative route for mitigating the impending pollution and energy crisis. Hence, the development of cost-effective and environmentally friendly semiconducting materials with high solar light captivation nature is imperative. To overcome this challenge, α-MnO2 nanorod (NR)-modified MOF UiO-66-NH2 (UNH) was prepared via a facile solvothermal method, which is efficient toward H2 evolution and oxy-tetracycline hydrochloride (O-TCH) degradation. The field-emission scanning electron microscopy (FESEM) and high-resolution transmission electron microscopy (HR-TEM) results of the α-MnO2@UNH (MnU) hybrid reveals its nanorod embedded in MOF matrix, and the X-ray photoelectron spectroscopy (XPS) result confirms the interaction of UNH moiety with α-MnO2 NRs. Additionally, the outstanding separation of photogenerated excitons and the charge-transfer efficacy are further validated by photoluminescence (PL), time-resolved photoluminescence (TRPL), electrochemical impedance spectroscopy (EIS), and transient photocurrent analysis, which are the key causes for photoactivity augmentation in the MnU composites. The MnU-2 composite shows a superior O-TCH degradation efficiency of 93.23% and an excellent H2 production rate of about 410.6 μmol h-1 upon light irradiation. This study provides significant evidence in favor of the suggested mediator-free S-scheme-adapted charge migration path, and it effectively explains the enhanced exciton separation leading to extraordinary catalytic efficiency of the proposed composite.
Suraj Prakash Tripathy, Satyabrata Subudhi, Asheli Ray, Pragyandeepti Behera, Gayatri Swain, Manjari Chakraborty, and Kulamani Parida
American Chemical Society (ACS)
Hydrogen and oxygen evolution via photocatalytic water splitting remains the quintessential alternative to fossil fuels. Photocatalysts must be sufficiently robust, competent, and productive toward harnessing sunlight in order to utilize the solar spectrum for maximal photocatalytic output. Herein, we have fabricated the MgIn2S4/UiO-66-NH2 composite via a facile solvothermal route and have determined its efficacy toward light-induced H2 and O2 generation reactions through water splitting with the aid of different sacrificial agents. Initially, the formation of pristine and composite materials was ascertained by PXRD, FTIR, etc. Moreover, with the aid of sophisticated morphological characterization techniques (FESEM and HRTEM), the intricate interaction between MgIn2S4 and UiO-66-NH2 was revealed. Additionally, the XPS studies suggested the effective interaction between the individual components with binding energy shifting suggesting the transfer of electrons from Zr-MOF to MgIn2S4. The PL and electrochemical aspects supported the effective photogenerated charge segregation in the prepared composite leading to superior photocatalytic outputs. Amidst the prepared composites of (3, 5, and 7 wt %) MgIn2S4/UiO-66-NH2, the 5 wt % or UM-2 composite displays optimal H2 and O2 evolution performances of 493.8 and 258.6 μmol h-1 (4-fold greater than for pristine MgIn2S4 and UiO-66-NH2), respectively. The nanocomposite's enhanced performance is indeed a consequence of the coadjuvant interaction among pristine UiO-66-NH2 and MgIn2S4 components that transpires via the Z-scheme-mediated charge transfer by enabling facile exciton segregation and channelization. Moreover, the composite inherited the remarkable framework stability of parent Zr-MOF, and the MgIn2S4 insertion had a negligible impact on the framework integrity. This work will offer a valuable model for developing robust Zr-MOF-based nanocomposite photocatalysts and evaluating their superior performance toward photocatalytic water redox reactions.
Jayashree Panda, Suraj Prakash Tripathy, Srabani Dash, Asheli Ray, Pragyandeepti Behera, Satyabrata Subudhi, and Kulamani Parida
Royal Society of Chemistry (RSC)
IT-MOFs and their derived nanomaterials: a strategic approach towards stupendous photocatalysis. This mini-review elucidates the crystal fabrication strategy, and emerging photocatalytic applications of IT-MOFs.
Pragyandeepti Behera, Asheli Ray, Suraj Prakash Tripathy, Lopamudra Acharya, Satyabrata Subudhi, and Kulamani Parida
Elsevier BV
Asheli Ray, Suraj Prakash Tripathy, Srabani Dash, Satyabrata Subudhi, and Kulamani Parida
American Chemical Society (ACS)
Suraj Prakash Tripathy, Satyabrata Subudhi, Asheli Ray, Pragyandeepti Behera, Jayashree Panda, Srabani Dash, and Kulamani Parida
Elsevier BV
Asheli Ray, Satyabrata Subudhi, Suraj Prakash Tripathy, Lopamudra Acharya, and Kulamani Parida
Wiley
AbstractPhotocatalytic H2O2 and H2 evolution are the sustainable alternative to meet the energy crisis. To fabricate an efficacious photocatalyst, here a robust MOF‐derived porous C/N co‐doped ZnO nano‐granular particles modified via in situ coupling with NixPy cocatalyst is developed. C and N are doped in ZnO via calcination of Zn‐MOF that narrows the bandgap of ZnO as verified by UV–vis DRS. More in, NixPy acts as robust cocatalyst, which enhances light absorption ability in the visible region. The existence of C, N, and Ni–P components along with their tremendous charge carrier dynamics are confirmed from XPS, PL, TRPL, and electrochemical analysis, respectively, that enhances the photoctalytic activity effectively. Hence, the H2O2 production rate and H2 evolution rate for optimized composite C/N‐ZNP‐2 are observed to be 2495.1 ± 62.3 µmol h−1 g−1and 12265 ± 112.4 µmol h−1 g−1, which are 2.8 and 2.7 folds higher than C/N‐ZnO, respectively. Additionally, the PO bond helps in inhibiting the further decomposition of H2O2. Consequently, the porous nature as well as larger surface area along with the presence of NixPy cocatalyst in C/N‐ZnO facilitates the overall reaction mechanism, hence paving the path for a robust photo‐catalyst towards sustainable energy generation.
Lekha Paramanik, Satyabrata Subudhi, and K.M. Parida
Elsevier BV
Bhagyashree Priyadarshini Mishra, Lopamudra Acharya, Satyabrata Subudhi, and Kulamani Parida
Elsevier BV
Pragyandeepti Behera, Satyabrata Subudhi, Suraj Prakash Tripathy, and Kulamani Parida
Elsevier BV
Suraj Prakash Tripathy, Satyabrata Subudhi, Asheli Ray, Pragyandeepti Behera, and Kulamani Parida
Royal Society of Chemistry (RSC)
Janus MOFs holds a novel strategy in overcoming the shortcomings of conventional metal–organic frameworks (MOFs) as well as non-porous Janus nanoparticles by exhibiting non-centrosymmetry and multi-functionality.
Suraj Prakash Tripathy, Satyabrata Subudhi, Asheli Ray, Pragyandeepti Behera, Asim Bhaumik, and Kulamani Parida
American Chemical Society (ACS)
A mixed-valency bimetallic Ce/Zr MOF with Ce3+/Ce4+ ions incorporated and an oxygen vacancy-rich single-component photocatalyst have been designed through the one-step solvothermal route to harness photons from the visible-light spectrum for green energy (H2) generation and ciprofloxacin (CIP) degradation. The one-pot-engineered bimetallic Ce/Zr MOF shows visible-light-active characteristics accompanied by a narrower band gap, along with enhanced exciton separation and superior ligand-to-metal charge transfer (LMCT), due to the presence of an interconvertible Ce3+/Ce4+ ions pair in comparison to its pristine MOF counterpart. The Ce ion insertion led to increase in electron density around the Zr4+ ion, along with generation of some oxygen vacancies (OV), which cumulatively led to the rise in the photo-reaction output. The synthesized UNH (Ce/Zr 1:1) MOF displayed a boosted photocatalytic H2 production rate of 468.30 μmol h-1 (ACE = 3.51%), which is around fourfolds higher than that of pristine MOFs. Moreover, for CIP photodegradation, the UNH (Ce/Zr 1:1) shows an enhanced efficiency of 90.8% and follows pseudo-first-order kinetics with a rate constant of 0.0363. Typically, the active species involved in the photo-redox reaction of the CIP photodegradation follows the order hydroxyl radical (OH•) < superoxide radical (O2•-), as confirmed by the TA and NBT tests. Consequently, the bimetallic Ce/Zr MOF can be readily employed as a robust photocatalyst with enhanced tendencies towards CIP degradation and H2 evolution.
Suraj Prakash Tripathy, Satyabrata Subudhi, Snehaprava Das, Malay Kumar Ghosh, Mira Das, Raghunath Acharya, Rashmi Acharya, and Kulamani Parida
Elsevier BV
Sriram Mansingh, Satyabrata Subudhi, Sabiha Sultana, Gayatri Swain, and Kulamani Parida
American Chemical Society (ACS)
Suraj Prakash Tripathy, Satyabrata Subudhi, and Kulamani Parida
Elsevier BV
Satyabrata Subudhi, Suraj Prakash Tripathy, and Kulamani Parida
Royal Society of Chemistry (RSC)
This review focuses on the possible synthesis route, characterization techniques, and mechanistic pathways involved in the photocatalytic applications of MO@MOFs.
Satyabrata Subudhi, Suraj Prakash Tripathy, and Kulamani Parida
Royal Society of Chemistry (RSC)
This review is dedicated to the brave COVID warriors fighting against the COVID-2019 pandemic.
Satyabrata Subudhi and Kulamani Parida
Elsevier BV
Satyabrata Subudhi, Gayatri Swain, Suraj Prakash Tripathy, and Kulamani Parida
American Chemical Society (ACS)
Hydrogen evolution from water splitting by means of a photocatalytic approach is an ideal future energy source and free of fossil reserves, in contrary photocatalytic O2 evolution remains a bottleneck due to high over potential and low efficiency. For reasonable use of solar light, photocatalysts must be sufficiently stable and efficient toward harvesting of sunlight from both theoretical and practical viewpoints. In this regard, here we have prepared MoS2-modified UiO-66-NH2 MOF through a facile hydrothermal technique and evaluated its efficiency toward photocatalytic H2 and O2 evolution by water splitting in the presence of sacrificial agents. A couple of similar type of analyses have been studied previously; however, this analysis represents a diverse scientific approach on the basis of interfacial contact toward reveal the actual potential of nanoflakes MoS2 as well as UiO-66-NH2. In this regard the as-synthesized photocatalyst was well-characterized by XRD, FTIR, UV-vis diffuse reflectance spectra, FESEM, HRTEM, XPS, and BET analysis techniques, which provide sufficient evidence toward successful synthesis of the pristine materials and efficacious anchorage of MoS2 on the active surface of UiO-66-NH2 by the ionic interaction between Zr-O and S/Mo. Among the synthesized photocatalysts (3 wt %) MoS2/UiO-66-NH2 shows the optimum outcome toward H2 and O2 evolution, i.e., 512.9 μmol/h (4.37 times greater than bare UiO-66-NH2) and 263.6 μmol/h (4.25 and 11.32 times greater than bare UiO-66-NH2 and MoS2, respectively). The superior performance obtained by the composite is due to the synergistic effect of pristine UiO-66-NH2 and MoS2 which proceeds through a type-II interband alignment for the facile channelization of excitons. This investigation will bestow a beneficial blue-print to construct challenging photocatalysts and to find out the paramount performance toward photocatalytic water redox reaction.
Satyabrata Subudhi, Lekha Paramanik, Sabiha Sultana, Sriram Mansingh, Priyabrat Mohapatra, and Kulamani Parida
Elsevier BV
Sriram Mansingh, Kundan Kumar Das, Arjun Behera, Satyabrata Subudhi, Sabiha Sultana, and Kulamani Parida
Royal Society of Chemistry (RSC)
Doped anatase TiO2 towards photocatalytic N2 fixation and TCH degradation under visible light illumination.
Suraj Prakash Tripathy, Satyabrata Subudhi, Rashmi Acharya, Raghunath Acharya, Mira Das, and Kulamani Parida
Springer Science and Business Media LLC
Satyabrata Subudhi, Sriram Mansingh, Gayatri Swain, Arjun Behera, Dharitri Rath, and Kulamani Parida
American Chemical Society (ACS)
The abolition of environmental pollutants and production of hydrogen (H2) from water using a heterogeneous photocatalyst is a demanding science of the current scenario to solve the increasing environmental pollution and worldwide energy catastrophe in modern life. To validate this purpose, the design of low-cost and durable semiconductor-based photocatalysts with great light absorption capacity becomes the most challenging issue for researchers. Regarding this, herein the phosphotungstic acid (HPW)-anchored Zr6O4(OH)4(BDC)6 (UiO-66) metal-organic framework (MOF), i.e., HPW@UiO-66, has been prepared by a hydrothermal method and is efficient, stable, and capable of harvesting solar energy toward the degradation of tetracycline hydrochloride (TCH) and H2 production in the presence of a sacrificial donor. The ionic interaction between HPW and UiO-66 plays a key role toward the photostability and charge-transfer mechanism of the composite and is well characterized with X-ray diffraction, UV diffuse-reflectance spectroscopy, Fourier transform infrared, and X-ray photoelectron spectroscopy. A total of 30 wt % HPW@UiO-66 shows a maximum degradation of about 87.24% of a 20 ppm TCH solution in 60 min of solar-light irradiation and about 353.89 μmol/h of H2 production. The conduction- and valence-band potentials are well characterized with Mott-Schottky measurement and a delay charge recombination process through electrochemical impedance spectroscopy. The proposed mediator-free Z-scheme-oriented electron-hole migration route is well supported by photoluminescence, and the scavenger test well explains the better charge-carrier separation and high catalytic performance of the prepared composite. This research will bestow an advantageous blueprint to fabricate novel and challenging photocatalysts toward the photocatalytic treatment of environmental pollutants and H2 evolution.
Satyabrata Subudhi, Sriram Mansingh, Suraj Prakash Tripathy, Ashutosh Mohanty, Priyabrat Mohapatra, Dharitri Rath, and Kulamani Parida
Royal Society of Chemistry (RSC)
The current study on Au/Pd@UiO-66-NH2 explores a novel approach towards photocatalytic SMC coupling reaction. This investigation highlights a well studied mechanistic pathway towards the formation of biphenyl as the target product.
Mitarani Sahoo, Sriram Mansingh, Satyabrata Subudhi, Priyabrat Mohapatra, and Kulamani Parida
Royal Society of Chemistry (RSC)
A plasmonic AuPd bimetal-decorated GO/LDH nano-photocatalyst displays encouraging Suzuki coupling performance under visible light illumination.