@phdthesis{oai:kyutech.repo.nii.ac.jp:00007469,
 author = {Alvin Lim Teik Zheng},
 month = {2022-01-04},
 note = {1 Introduction and Literature Review||2 Accessing Effects of Aliphatic Dicarboxylic Acid Towards the Physical and Chemical Changes in Low Temperature Hydrothermally Reduced Graphene Hydrogel||3 Hydrothermally Reduced Graphene Hydrogel Intercalated with Divalent Ions for Dye Adsorption Studies||4 Design of Reduced Graphene Hydrogel with Alkylamine Surface Functionalization Through Immersion/Agitation Method and Its Adsorption Mechanism||5 Synthesis of Silver Nanoparticles /Porphyrin/Reduced Graphene Oxide Hydrogel as Dye Adsorbent for Wastewater Treatment||6 Cu2o/Tio2 Decorated on Cellulose Nanofiber/Reduced Graphene Hydrogel for Enhanced Photocatalytic Activity and Its Antibacterial Applications||7 Conclusions and Recommendations, The depletion of natural and man-made quality water sources has become rampant today. In this study, functionalized three-dimensional （3D） graphene architecture prepared via the facile hydrothermal treatment has been systematically explored as an ingenious strategy in the mitigation of various pollutants; also extending to the mitigation of bacterial infestation. The morphological, structural, thermal, optical, and textural properties of the hydrothermally modified reduced graphene hydrogels （rGH） were systematically studied. In Chapter One, the synthesis methods with a specific focus on hydrothermally prepared 3D graphene structure are discussed. The fundamentals of adsorption and photocatalysis are also explored. The recent findings on the applications of hybrid 3D graphene-based architectures for the remediation of noxious pollutants are also briefly shared. An effort has also been made to collate recent anti-bacterial disinfections applications using hybrid three-dimensional graphene architectures. In Chapter Two, the effect of dicarboxylic acid as cross-linkers in hydrothermally prepared reduced graphene hydrogel is briefly explored. It was found that a higher specific surface （SSA） of the hydrogel is obtained for shorter chain length DCAs. The subsequent chapter, Chapter Three deals with the evaluation of the intercalation of alkali earth metal divalent ions in hydrothermally prepared graphene hydrogel on the adsorption capability towards cationic dyes, methylene blue, and rhodamine B. In Chapter Four, the functionalization of various alkylamine chain lengths on the surface of graphene hydrogel was carried out using a simple two-step method involving hydrothermal treatment, followed by immersion/agitation treatment. The evaluation of the adsorption capability of the modified hydrogels towards methylene blue （MB） and bisphenol-A （BPA） was carried out. Chapter Five deals with the preparation of a novel self-assembled reduced graphene hydrogel modified with silver nanoparticles （AgNPs） and various porphyrin complexes. The AgNPs were successfully decorated on the reduced graphene sheets via electrostatic interactions. On the other hand, the interaction of porphyrin complexes with the Ag/rGH is via esterification and π-π interactions. The adsorption capability of the modified hydrogels towards methylene blue （MB） is further evaluated. Chapter Six covers the preparation and characterization of photocatalyst loaded on three-dimensional graphene hydrogel for photocatalytic degradation of methyl orange. The assessment of their antibacterial activity towards Escherichia coli showed a promising result. In Chapter Seven, an attempt has been made to conclude on important findings from each chapter. Besides, some recommendations for future studies were proposed to bring added value to this existing research. This study may not have covered all aspects of hydrothermally prepared graphene hydrogel in terms of the applications in wastewater remediation, but, hopefully, this dissertation could provide a brief overview of the simple yet easy method of hydrothermal to functionalize the reduced graphene hydrogel. Certainly, this PhD dissertation will be useful to new entrants and experienced researchers intending to employ hydrothermally reduced graphene hydrogel in the future for environmental remediation purposes, 九州工業大学博士学位論文 学位記番号：生工博甲第417号 学位授与年月日：令和3年9月24日, 令和3年度},
 school = {九州工業大学},
 title = {Functionalization of Graphene through Hydrothermal Treatment to Produce Hydrogel/Aerogel and Its Applications},
 year = {}
}