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1

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Highly ordered iron oxide-mesoporous fullerene nanocomposites for oxygen reduction reaction and supercapacitor applications

Benzigar, Mercy R. ; Joseph, Stalin ; Saianand, Gopalan ; [et al.]

Elsevier BV ; 2019

In: Microporous and Mesoporous Materials Vol. 285 ( 2019-09), p. 21-31

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In: Microporous and Mesoporous Materials, Elsevier BV, Vol. 285 ( 2019-09), p. 21-31

Type of Medium: Online Resource

ISSN: 1387-1811

URL: Article

DOI: 10.1016/j.micromeso.2019.04.071

Language: English

Publisher: Elsevier BV

Publication Date: 2019

detail.hit.zdb_id: 2012505-7

SSG: 13

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2

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One Pot Synthesis of New Gold Nanoparticles Dispersed Poly(2-aminophenyl boronic acid) Composites for Fabricating an Affinity Based Electrochemical Detection of Glucose

Sai-Anand, Gopalan ; Gopalan, Anantha-Iyengar ; Kang, Shin-Won ; [et al.]

American Scientific Publishers ; 2014

In: Science of Advanced Materials Vol. 6, No. 7 ( 2014-07-01), p. 1356-1364

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In: Science of Advanced Materials, American Scientific Publishers, Vol. 6, No. 7 ( 2014-07-01), p. 1356-1364

Type of Medium: Online Resource

ISSN: 1947-2935 , 1947-2943

URL: Article

DOI: 10.1166/sam.2014.1836

Language: English

Publisher: American Scientific Publishers

Publication Date: 2014

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3

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Preparation of Visible Light Photocatalytic Graphene Embedded Rutile Titanium(IV) Oxide Composite Nanowires and Enhanced NOx Removal

Lee, Jun-Cheol ; Gopalan, Anantha-Iyengar ; Sai-Anand, Gopalan ; [et al.]

MDPI AG ; 2019

In: Catalysts Vol. 9, No. 2 ( 2019-02-11), p. 170-

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In: Catalysts, MDPI AG, Vol. 9, No. 2 ( 2019-02-11), p. 170-

Abstract: The quest for developing highly efficient TiO2-based photocatalysts is continuing and, in particular, evolving a new strategy is an important aspect in this regard. In general, much effort has been devoted to the anatase TiO2 modifications, despite there being only a few recent studies on rutile TiO2 (rTiO2). To the best of our knowledge, studies on the preparation and characterization of the photocatalysts based on the intentional inclusion of graphene (G) into rTiO2 nanostructures have not been reported yet. Herein, we develop a new type of TiO2-based photocatalyst comprising of G included pure rTiO2 nanowire (abbreviated as rTiO2(G) NW) with enhanced visible light absorption capability. To prepare rTiO2(G) NW, the G incorporated titanate electrospun fibers were obtained by electrospinning and subsequently heat treated at various temperatures (500 to 800 °C). Electrospinning conditions were optimized for producing good quality rTiO2(G) NW. The rTiO2(G) NW and their corresponding samples were characterized by appropriate techniques such as X-ray diffraction (XRD), scanning electron microscopy, high-resolution transmission electron microscopy and UV-vis diffuse reflectance spectroscopy to ascertain their material characteristics. XRD results show that the lattice strain occurs upon inclusion of G. We present here the first observation of an apparent bandgap lowering because of the G inclusion into TiO2 NW. While anatase TiO2 NW exhibited poor visible light photocatalysis towards NOx removal, the rTiO2(G) NW photocatalyst witnessed a significantly enhanced (~67%) photocatalytic performance as compared to anatase TiO2(G) NW. We concluded that the inclusion of G into rTiO2 nanostructures enhances the visible light photoactivity. A plausible mechanism for photocatalysis is suggested.

Type of Medium: Online Resource

ISSN: 2073-4344

URL: Article

DOI: 10.3390/catal9020170

Language: English

Publisher: MDPI AG

Publication Date: 2019

detail.hit.zdb_id: 2662126-5

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4

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Fabrication of a Self-Powered Glucose Sensor Using Carbon Nanotube-Based Nanomesh and Direct Electron Transfer: A Prospective Approach for Energy Harvesting in Sensor Networks

Anand, Gopalan Sai ; Komathi, Shanmugasundaram ; Gopalan, Anantha Iyengar ; [et al.]

American Scientific Publishers ; 2010

In: Journal of Nanoelectronics and Optoelectronics Vol. 5, No. 2 ( 2010-08-01), p. 129-134

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In: Journal of Nanoelectronics and Optoelectronics, American Scientific Publishers, Vol. 5, No. 2 ( 2010-08-01), p. 129-134

Type of Medium: Online Resource

ISSN: 1555-130X , 1555-1318

URL: Article

DOI: 10.1166/jno.2010.1078

Language: English

Publisher: American Scientific Publishers

Publication Date: 2010

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5

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A new optical-electrical integrated buffer layer design based on gold nanoparticles tethered thiol containing sulfonated polyaniline towards enhancement of solar cell performance

Gopalan, Sai-Anand ; Gopalan, Anantha-Iyengar ; Vinu, Ajayan ; [et al.]

Elsevier BV ; 2018

In: Solar Energy Materials and Solar Cells Vol. 174 ( 2018-01), p. 112-123

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In: Solar Energy Materials and Solar Cells, Elsevier BV, Vol. 174 ( 2018-01), p. 112-123

Type of Medium: Online Resource

ISSN: 0927-0248

URL: Article

DOI: 10.1016/j.solmat.2017.08.029

Language: English

Publisher: Elsevier BV

Publication Date: 2018

detail.hit.zdb_id: 2012677-3

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6

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Mixed Copper/Copper‐Oxide Anchored Mesoporous Fullerene Nanohybrids as Superior Electrocatalysts toward Oxygen Reduction Reaction

Saianand, Gopalan ; Gopalan, Anantha‐Iyengar ; Lee, Jun‐Cheol ; [et al.]

Wiley ; 2020

In: Small Vol. 16, No. 12 ( 2020-03)

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In: Small, Wiley, Vol. 16, No. 12 ( 2020-03)

Abstract: Developing a highly active, stable, and efficient non‐noble metal‐free functional electrocatalyst to supplant the benchmark Pt/C‐based catalysts in practical fuel cell applications remains a stupendous challenge. A rational strategy is developed to directly anchor highly active and dispersed copper (Cu) nanospecies on mesoporous fullerenes (referred to as Cu‐MFC 60 ) toward enhancing oxygen reduction reaction (ORR) electrocatalysis. The preparation of Cu‐MFC 60 involves i) the synthesis of ordered MFC 60 via the prevalent nanohard templating technique and ii) the postfunctionalization of MFC 60 with finely distributed Cu nanospecies through incipient wet impregnation. The concurrence of Cu and cuprous oxide nanoparticles in the as‐developed Cu‐MFC 60 samples through relevant material characterizations is affirmed. The optimized ORR catalyst, Cu(15%)‐MFC 60 , exhibits superior electrocatalytic ORR characteristics with an onset potential of 0.860 vs reversible hydrogen electrode, diffusion‐limiting current density (−5.183 mA cm −2 ), improved stability, and tolerance to methanol crossover along with a high selectivity (four‐electron transfer). This enhanced ORR performance can be attributed to the rapid mass transfer and abundant active sites owing to the synergistic coupling effects arising from the mixed copper nanospecies and the fullerene framework.

Type of Medium: Online Resource

ISSN: 1613-6810 , 1613-6829

URL: Issue

URL: Article

DOI: 10.1002/smll.v16.12

DOI: 10.1002/smll.201903937

Language: English

Publisher: Wiley

Publication Date: 2020

detail.hit.zdb_id: 2168935-0

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7

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Cost-Effective Production of TiO2 with 90-Fold Enhanced Photocatalytic Activity Via Facile Sequential Calcination and Ball Milling Post-Treatment Strategy

Gopalan, Anantha-Iyengar ; Lee, Jun-Cheol ; Saianand, Gopalan ; [et al.]

MDPI AG ; 2020

In: Materials Vol. 13, No. 22 ( 2020-11-10), p. 5072-

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In: Materials, MDPI AG, Vol. 13, No. 22 ( 2020-11-10), p. 5072-

Abstract: Titanium dioxide (TiO2), the golden standard among the photocatalysts, exhibits a varying level of photocatalytic activities (PCA) amongst the synthetically prepared and commercially available products. For commercial applications, superior photoactivity and cost-effectiveness are the two main factors to be reckoned with. This study presents the development of simple, cost-effective post-treatment processes for a less costly TiO2 to significantly enhance the PCA to the level of expensive commercial TiO2 having demonstrated superior photoactivities. We have utilized sequential calcination and ball milling (BM) post-treatment processes on a less-costlier KA100 TiO2 and demonstrated multi-fold (nearly 90 times) enhancement in PCA. The post-treated KA100 samples along with reference commercial samples (P25, NP400, and ST01) were well-characterized by appropriate instrumentation and evaluated for the PCA considering acetaldehyde photodegradation as the model reaction. Lattice parameters, phase composition, crystallite size, surface functionalities, titanium, and oxygen electronic environments were evaluated. Among post-treated KA100, the sample that is subjected to sequential 700 °C calcination and BM (KA7-BM) processes exhibited 90-fold PCA enhancement over pristine KA100 and the PCA-like commercial NP400 (pure anatase-based TiO2). Based on our results, we attribute the superior PCA for KA7-BM due to the smaller crystallite size, the co-existence of mixed anatase-srilankite-rutile phases, and the consequent multiphase heterojunction formation, higher surface area, lattice disorder/strain generation, and surface oxygen environment. The present work demonstrates a feasible potential for the developed post-treatment strategy towards commercial prospects.

Type of Medium: Online Resource

ISSN: 1996-1944

URL: Article

DOI: 10.3390/ma13225072

Language: English

Publisher: MDPI AG

Publication Date: 2020

detail.hit.zdb_id: 2487261-1

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8

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Improving Photovoltaic Properties of P3HT:IC60BA through the Incorporation of Small Molecules

Xu, Binrui ; Sai-Anand, Gopalan ; Gopalan, Anantha-Iyengar ; [et al.]

MDPI AG ; 2018

In: Polymers Vol. 10, No. 2 ( 2018-01-26), p. 121-

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In: Polymers, MDPI AG, Vol. 10, No. 2 ( 2018-01-26), p. 121-

Type of Medium: Online Resource

ISSN: 2073-4360

URL: Article

DOI: 10.3390/polym10020121

Language: English

Publisher: MDPI AG

Publication Date: 2018

detail.hit.zdb_id: 2527146-5

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9

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Recent Progress in the Abatement of Hazardous Pollutants Using Photocatalytic TiO2-Based Building Materials

Gopalan, Anantha-Iyengar ; Lee, Jun-Cheol ; Saianand, Gopalan ; [et al.]

MDPI AG ; 2020

In: Nanomaterials Vol. 10, No. 9 ( 2020-09-16), p. 1854-

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In: Nanomaterials, MDPI AG, Vol. 10, No. 9 ( 2020-09-16), p. 1854-

Abstract: Titanium dioxide (TiO2) has been extensively investigated in interdisciplinary research (such as catalysis, energy, environment, health, etc.) owing to its attractive physico-chemical properties, abundant nature, chemical/environmental stability, low-cost manufacturing, low toxicity, etc. Over time, TiO2-incorporated building/construction materials have been utilized for mitigating potential problems related to the environment and human health issues. However, there are challenges with regards to photocatalytic efficiency improvements, lab to industrial scaling up, and commercial product production. Several innovative approaches/strategies have been evolved towards TiO2 modification with the focus of improving its photocatalytic efficiency. Taking these aspects into consideration, research has focused on the utilization of many of these advanced TiO2 materials towards the development of construction materials such as concrete, mortar, pavements, paints, etc. This topical review focuses explicitly on capturing and highlighting research advancements in the last five years (mainly) (2014–2019) on the utilization of various modified TiO2 materials for the development of practical photocatalytic building materials (PBM). We briefly summarize the prospective applications of TiO2-based building materials (cement, mortar, concretes, paints, coating, etc.) with relevance to the removal of outdoor/indoor NOx and volatile organic compounds, self-cleaning of the surfaces, etc. As a concluding remark, we outline the challenges and make recommendations for the future outlook of further investigations and developments in this prosperous area.

Type of Medium: Online Resource

ISSN: 2079-4991

URL: Article

DOI: 10.3390/nano10091854

Language: English

Publisher: MDPI AG

Publication Date: 2020

detail.hit.zdb_id: 2662255-5

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10

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Electrostatic nanoassembly of contact interfacial layer for enhanced photovoltaic performance in polymer solar cells

Sai-Anand, Gopalan ; Gopalan, Anantha-Iyengar ; Lee, Kwang-Pill ; [et al.]

Elsevier BV ; 2016

In: Solar Energy Materials and Solar Cells Vol. 153 ( 2016-08), p. 148-163

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In: Solar Energy Materials and Solar Cells, Elsevier BV, Vol. 153 ( 2016-08), p. 148-163

Type of Medium: Online Resource

ISSN: 0927-0248

URL: Article

DOI: 10.1016/j.solmat.2016.04.018

Language: English

Publisher: Elsevier BV

Publication Date: 2016

detail.hit.zdb_id: 2012677-3

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