Self-assembly of carbon nanotube/graphitic-like flake/BiOBr nanocomposite with 1D/2D/3D heterojunctions for enhanced photocatalytic activity

Novel BiOBr by compositing low-cost biochar for efficient ciprofloxacin removal: the synergy of adsorption and photocatalysis on the degradation kinetics and mechanism insight

“… 33 The other two peaks at 286.53 eV and 288.44 eV correspond to C–O and C O bonds, indicating that C–O–Bi might be formed between C and BiOBr, which was beneficial to the charge transfer during light excitation. 34 The efficient charge transfer prevented light-induced electron–hole recombination in order to enhance the photocatalytic activity. 35 The peaks of O 1s appeared at 530.09 eV and 532.02 eV, respectively.…”

Green Assembly of Covalently Linked BiOBr/Graphene Composites for Efficient Visible Light Degradation of Dyes

“…[12][13][14][15]17 According to previous reports, most BiOBr−graphene composites focus on the formation of inorganic BiOBr nanocrystals by selectively loading onto the graphene surface via a free nucleation and growth process in a mixed solution of metal salts and graphene oxide (GO). 13,15,17 However, this technique has few possible downsides. First of all, only a portion of the graphene sheet surface can be covered by discrete BiOBr nanocrystals, and thus, most of the graphene surface remains uncovered and contact interaction between them is also limited, which appears to reduce the composite's photocatalytic activity and active locations.…”

“…Organic dyes and pigments discharged into the environment mixed with industrial wastewater pose threats to human health and Mother Nature. , Efficient utilization of solar energy in terms of newly developed photocatalytic degradation technology has been identified as a clean and economic approach for toxicity removal from industrial liquid waste and hence reversing or stopping environmental damage. − Among the various semiconductor photocatalysts that have been developed, including TiO 2 , ZnO, Ag 3 PO 4 , Bi 2 WO 6 , BiVO 4 , and others, specific importance has been given to two-dimensional (2D) layered BiOBr fabricated by interleaving [Bi 2 O 2 ] slabs with slabs of double bromine. The band gap and internal interleaving electric field of 2D layered BiOBr are such that considerable photocatalytic activity can be achieved by visible light excitation. , However, individual BiOBr shows limited photocatalytic activity owing to least efficient captivation of visible light, sluggish charge transfer capability, and nonideal electron–hole pair separation efficiency. , Hence, research efforts have been made to fabricate composites of BiOBr with functional materials of recent interest such as graphene or graphitic-like flakes for developing advanced photocatalytic decontaminants, which open possibilities to combine favorable characteristics of both the materials. − …”

“…Additionally, oxygen-containing functional groups distinguish graphene oxide (GO) from graphene. Reduction of GO produces reduced graphene oxide (RGO), and it is commonly used as a precursor for simple and efficient fabrication of optimized composites due to graphene’s unique properties such as exceptional electrical conductivity, huge specific surface area, and extraordinary transparency. − Thus, various BiOBr–graphene composites have been fabricated to enhance the photocatalytic activity of BiOBr. − , According to previous reports, most BiOBr–graphene composites focus on the formation of inorganic BiOBr nanocrystals by selectively loading onto the graphene surface via a free nucleation and growth process in a mixed solution of metal salts and graphene oxide (GO). ,, However, this technique has few possible downsides. First of all, only a portion of the graphene sheet surface can be covered by discrete BiOBr nanocrystals, and thus, most of the graphene surface remains uncovered and contact interaction between them is also limited, which appears to reduce the composite’s photocatalytic activity and active locations .…”

“… 9 , 10 Hence, research efforts have been made to fabricate composites of BiOBr with functional materials of recent interest such as graphene or graphitic-like flakes for developing advanced photocatalytic decontaminants, which open possibilities to combine favorable characteristics of both the materials. 11 − 15 …”