Open AccessEffects of Prepared WSe2 with Two Different Reductants on Its Photocatalytic Reduction Performance of Carbon Dioxide
Author(s) -
Zheng Luo,
Y H Li,
Fan Guo,
L X Zhang,
Bingya Hou,
Jinhan Guo,
S N Wang
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/701/1/012043
Subject(s) - photocatalysis , bet theory , materials science , catalysis , absorption (acoustics) , specific surface area , adsorption , desorption , nanotechnology , analytical chemistry (journal) , chemistry , organic chemistry , composite material
Fossil fuel combustion and automobile exhaust emissions are the main causes of the greenhouse effect. An effective measure to solve this problem is to convert carbon dioxide into green and clean energy. Photocatalytic technology is a green technology with important application prospects in the energy and environmental fields. At present, the catalyst has some defects, such as specific surface area is lower, the photoelectric-hole pair recombination rate is fast and the quantum efficiency is low. Therefore, effective photocatalysts have become the focus of researchers. In the paper, WSe 2 was successfully prepared by the hydrothermal reaction using two different reductants and solvents, and the XRD, UV-Vis DRS, N 2 adsorption-desorption tests are adopted for characterization of prepared sample. The XRD, UV-Vis DRS and BET characterization results show that the WSe 2 samples prepared with two reductants both contain pure-phase WSe 2 , and the location distribution of main diffraction peaks is consistent with that of hexagonal WSe 2 (JCPDS card, PDF#38-1388); the prepared WSe 2 presents photo response within the range of 200-700nm, but compared with WSe 2 (NaBH 4 ), the light absorption intensity of WSe 2 (N 2 H 4 .H 2 O) is significantly enhanced; compared with WSe 2 (NaBH 4 ), the specific surface area of WSe 2 (N 2 H 4 .H 2 O) is bigger, which are 3.4 m 2. g −1 and 3.0 m 2 g −1 , respectively. After photocatalytic reaction for 12h with the catalyst of two different WSe 2 (N 2 H 4 .H 2 O) and WSe 2 (NaBH 4 ), WSe 2 (N 2 H 4 .H 2 O) shows great photocatalytic activity, and the overall yields of CH 3 OH are 327.13 μmol g −1 cat and 46.32 μmol g − 1 cat, respectively.