An investigation on neat and modified aluminium al based layered double hydroxide for energy and environmental applications

Abstract

Energy crises and environmental pollution are the two major issues affecting newlineliving life globally. Population growth and large industrialization enforce these issues newlinethrough water, air pollution and energy requirements. So in the need of hour, newlineintroduction of a clean energy system and environmental remediation technology are newlinebiggest challenge for researcher. The diminution of fossil fuel encourage for an newlinealternative source of energy. In this search solar energy accepted as an innumerable newlinerenewable source of clean energy. By implementing a green technology semiconductor newlinebased photocatalysis can be used for energy conversion and environmental contaminant newlineelimination. Designing an efficient adsorbent for water purification is another green newlineapproach for environmental remediation. Bearing in mind these above reason, the newlinepresent investigation based on construction of an efficient material like aluminium based newlinelayered double hydroxide and its modified form by employing many synthetic strategy newlinelike (i) metal cation doping in the brucite layer of LDH for surface area modification (ii) newlinemodified LDH based on heterostructure formation through p-n junction for efficient newlineseparation and migration of space charge region. newlineAluminium based LDHs have high crystallinity which is beneficial for the newlinenanosheets growth, that s also leads to increase the thickness of LDH and existence of newlinemore OH- group projected to have high hydrophilic surface, improved the surface newlinechemical reaction and it modified form showed high photocatalytic activity (water redox newlinereaction and Chromium reduction) as well as adsorption (Malachite green removal).The photocatalytic activity of as-synthesized CoAl LDH, NiAl LDH and MgAl newlineLDH has been compared towards chromium (VI) reduction. The XRD result indicates newlinethe pure formation of LDH phase with the degree of crystallization, which depends on newlinethe incorporated metal and confirmed the LDH formation. The larger crystallinity CoAl newlineLDH exhibited 99% Cr(IV) degradation than NiAl LDH (87%) and MgAl LDH (51%) at newlinepH 5. CoAl