MoS₂ with structure tuned photocatalytic ability for degradation of methylene blue

Abstract

In this work, a series of nanostructured molybdenum disulfide (MoS2) with various morphologies, such as spherical, flower-like, coil and hollow were synthesized via a one-step hydrothermal method. The photocatalytic properties of as obtained MoS2were evaluated by degrading methylene blue (MB) under visible light. Interestingly, the flower-like MoS2 exhibited the best photocatalytic activities. It is ascribed that the suitable porous structures of flower-like MoS2 can increase the number of exposed active sites, which facilitate the efficient adsorption and transfer of MB to the active sites. Meanwhile, the special structure of flower-like MoS2 can improve light absorption efficiency owing to the increasing of light paths. Furthermore, its 2D stacked petals possess abundant active sites, which will effectively affect the photocatalytic efficiency. This study indicates that the surface area of nanomaterials is not a dominated factor in photocatalytic performance. The surface morphology has a great influence on the photocatalytic performance, which provides a feasible guide for synthesizing efficient photocatalytic nanomaterials.

Promising performance of chemically exfoliated Zr-doped MoS2 nanosheets for catalytic and antibacterial applications

“…3a 100), ( 101), ( 103), (006), ( 105) and (106) planes respectively. 2,24,25 Observed reections reveal hexagonal phase without impurity peak, which correlated well with JCPDS card no. 00-37-1492.…”

“…Around 97.5% of the earth's water reservoir is salty which leaves only 2.5% water that is held in reserve for the sustenance of humankind. 1,2 Untreated wastewater emanating from various industries such as, cosmetics, paper, textile and chemical manufacturing not only serves to pollute and diminish an already limited supply of clean water but also creates a hazard for the environment and living species alike. 3 In view of above, it has become of utmost importance to devise innovative ways to purify polluted water in order to make its availability more widespread especially in developing countries where this issue requires immediate attention.…”

Germanene Nanosheets: Achieving Superior Sodium‐Ion Storage via Pseudointercalation Reactions

“…The third stage of weight loss could be probably ascribed to the loss of Cl. [41] In addition, the Brunauer-Emmett-Teller (BET) method was performed to measure the specific area of germanene with a value of around 15.6 m 2 g À1 , which is comparable with that of 2D MoS 2 [42] (Figure S4, Supporting Information). Generally speaking, the low value of specific area is mainly due to the stacking and collapse of germanene during the testing procedure, compared to monolayer graphene.…”

Engineering the Performance and Stability of Molybdenum Disulfide for Heavy Metal Removal

“…These values are compared to the theoretical bulk density of MoS 2 , which is approximately 5.06 g cm –3 , suggesting crystallinity differences as a result of growth temperature conditions . Specific surface areas (SSAs) ranged from 0.01 to 0.04 m 2 g –1 , which are values generally lower than those previously reported for supported and nonsupported MoS 2 . − The lower specific surface areas may be attributed to the fact that the MoS 2 film is grown on a planar crystalline substrate support, in contrast to most studies in which the MoS 2 is used as a porous powder dispersion. ,, These SSA values are generally within the same order of magnitude and are not correlated to growth temperatures.…”