Tunable microscopic aggregation morphology of α-Ni(OH)2 for enhanced photocatalytic degradation of fracturing flowback fluid with ozone synergy

In this study, hydrothermal synthesis was used to prepare α-Ni(OH) 2 , which is a steady-state photocatalytic material. Furthermore, ball milling for the 1:1 loading of with nano-alumina (Al O 3 ), hexagonal boron nitride (h-BN), and activated carbon (AC). The performances these four materials in degradation fracturing flowback fluid were investigated under synergistic catalytic effect ozone. results showed that effect, /nano -Al photocatalyzed formation active hydroxyl radicals (·OH) superoxide (·O − turn degraded return solution. Although ozone itself can spontaneously form certain ·OH water, compared nano- Al higher valence band 0.2eV provided more sites better electron migration efficiency conversion ozone, improving process ( Figure 11 ). addition, unlike other two types carriers, nano-Al could provide intergranular support nanopillared increasing specific surface area number sites.